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QUARTERLY REPORT
OF
SOUTHERN REGION
Q3 (OCT-DEC’16)
SOUTHERN REGIONAL LOAD DESPATCH CENTRE
POWER SYSTEM OPERATION CORPORATION LTD
BANGALORE
INDEX
1. POWER SUPPLY POSITION a.) Peak Demand met and Unrestricted Demand b.) Demand Chart c.) Energy availability and Requirement d.) Energy availability and Requirement chart
2. QUALITY OF SERVICE a) Frequency profile b) Voltage Profile
3. INTERREGIONAL EXCHANGES 4. SCHEDULE VS DRAWAL OF STATES 5. WIND GENERATION IN SOUTHERN REGION 6. SUMMARY REPORT
a) Commissioning of new Generating units b) Commissioning of new Transmission lines c) Commissioning of new Substations d) Commissioning of new Line/Bus reactors. e) Transmission constraints & Voltage problems affecting Grid operation
i) Transmission constraints ii) ICT constraints iii) Low voltage iv) High voltage
f) Major Disturbances affecting Grid operation i) Grid Disturbances ii) Grid Incidences
1. POWER SUPPLY POSITION
a) Peak Demand Met and Unrestricted Demand
Month State/UTUnrestricted
Demand (MW)Peak Demand Met
(MW)Shortage (MW) Shortage (%)
Andhrapradesh7404.00 7404.00 0.00 0.00
Telangana7789.00 7789.00 0.00 0.00
Karnataka9574.26 9574.26 0.00 0.00
Kerala3606.97 3603.80 3.17 0.09
Tamilnadu14687.70 14687.70 0.00 0.00
Pondicherry338.00 338.00 0.00 0.00
S.Region41647.50 41610.00 37.50 0.09
Andhrapradesh7296.00 7296.00 0.00 0.00
Telangana7561.00 7561.00 0.00 0.00
Karnataka9888.01 9870.57 17.45 0.18
Kerala3625.40 3622.24 3.17 0.09
Tamilnadu14163.30 14163.30 0.00 0.00
Pondicherry341.00 341.00 0.00 0.00
S.Region40192.00 40192.00 0.00 0.00
Andhrapradesh7135.81 7117.00 18.81 0.26
Telangana7835.44 8220.00 -384.56 -4.68
Karnataka9330.58 9330.58 0.00 0.00
Kerala3532.61 3528.39 4.22 0.12
Tamilnadu13583.70 13583.70 0.00 0.00
Pondicherry321.00 321.00 0.00 0.00
S.Region38553.00 38528.00 25.00 0.06
Oct-16
Nov-16
Dec-16
b.) SR Demand chart
Month Peak Demand(MW) Demand Met(MW) Shortage(MW) % Shortage
Oct-16 41647.50 41610.00 37.50 0.09
Dec-16 38553.00 38528.00 25.00 0.06
Nov-16 40192.00 40192.00 0.00 0.00
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
Oct-16 Nov-16 Dec-16PEAK 41647 40192 38553DEMAND MET 41610 40192 38528
Dema
nd (M
W)
Peak Vs Unrestricted Demand (MW)
c) Energy availability and Requirement(MU)
Month State/UTRequirement
(MU)Energy met
(MU)Shortage (MU) Shortage (%)
Andhrapradesh4820.80 4820.15 0.65 0.01
Telangana4557.82 4557.13 0.69 0.02
Karnataka5984.58 5983.67 0.91 0.02
Kerala2000.40 1999.52 0.88 0.04
Tamilnadu9060.42 9059.13 1.29 0.01
Pondicherry205.80 205.77 0.03 0.02
S.Region26629.82 26625.37 4.45 0.02
Andhrapradesh4845.62 4844.16 1.45 0.03
Telangana4373.86 4372.31 1.55 0.04
Karnataka6230.92 6185.88 45.03 0.73
Kerala2006.25 2003.93 2.31 0.12
Tamilnadu8885.85 8882.99 2.87 0.03
Pondicherry202.99 202.55 0.44 0.22
S.Region26545.49 26491.84 53.65 0.20
Andhrapradesh4313.00 4311.29 1.71 0.04
Telangana4509.13 4507.32 1.81 0.04
Karnataka5776.52 5774.15 2.37 0.04
Kerala1959.10 1952.29 6.81 0.35
Tamilnadu8035.80 8032.44 3.36 0.04
Pondicherry184.12 184.03 0.09 0.05
S.Region24777.67 24761.52 16.15 0.07
Oct-16
Nov-16
Dec-16
d) Energy availability and Requirement(MU) chart
Month Requirement (MU) Availability(MU) Shortage % Shortage
Nov-16 26545.49 26491.84 53.65 0.20
Dec-16 24777.67 24761.52 16.15 0.07
Oct-16 26629.82 26625.37 4.45 0.02
0
5000
10000
15000
20000
25000
30000
Oct-16 Nov-16 Dec-16Requirement (MU) 26630 26545 24778Availability(MU) 26625 26492 24762
Energ
y (Mu
)
Energy availability and Requirement(MU)
2. QUALITY OF SERVICE
a) Frequency Profile (% time)
Month <49.7 <49.7-49.9 49.9-50.05 >50.05-50.20 >50.2
Oct-16 0.00 7.31 75.43 17.22 0.05
Nov-16 0.08 10.90 72.54 16.43 0.05
Dec-16 0.00 6.78 74.63 18.57 0.02
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
Oct-16 Nov-16 Dec-16<IEGC 7.31 10.98 6.78IEGC 75.43 72.54 74.63>IEGC 17.26 16.48 18.59
% of
Tim
e
Frequency Profile
b) Voltage Profile
Month
Station Max(kV) Min(kV) Max(kV) Min(kV) Max(kV) Min(kV)
Ramagundam 424 409 422 411 424 405
Hyderabad 426 404 426 406 428 401
Bangalore 416 406 419 401 425 402
Madras 421 409 426 403 430 407
Neyveli 420 410 418 403 420 400
Kolar 424 414 427 406 430 412
Vijaywada 429 410 435 413 428 411
Trichur 418 396 411 390 423 383
Udumalpet 431 417 414 401 432 396
3. INTER-REGIONAL EXCHANGES(PHYSICAL) in MU
Month Bhadravati Gazuwaka Talcher-KolarKUDGI-
KHOLAPUR
Import SR(MU)Import SR(MU)
Import SR(MU)Net Import (MU)
Oct-16 657 427 1171 166
Nov-16 694 454 1320 212
Dec-16 564 419 1228 153
1326
1248
Oct-16 Nov-16 Dec-16
Raichur-Sholapur Line
Import SR(MU)
1211
4. SCHEDULE Vs ACUAL DRAWAL BY STATES
Month STATE/UT Schedule (MU) Drawal (MU) OD(+)/UD(-)
APTRANSCO 513.74 600.03 86.29
TSTRANSCO 2313.45 2351.17 37.72
KPTCL 2323.15 2481.01 157.86
KSEB 1550.78 1616.72 65.94
TNEB 4058.14 4082.72 24.58
PONDY 215.35 205.77 -9.58
GOA 51.44 51.51 0.07
APTRANSCO 771.03 835.24 64.21
TSTRANSCO 2040.89 2084.65 43.76
KPTCL 2323.42 2440.82 117.4
KSEB 1600.37 1678.27 77.9
TNEB 4373.72 4376.70 2.98
PONDY 207.46 196.02 -11.44
GOA 49.37 48.15 -1.22
APTRANSCO 771.03 835.24 64.21
TSTRANSCO 2040.89 2084.65 43.76
KPTCL 2323.42 2440.82 117.4
KSEB 1600.37 1678.27 77.9
TNEB 4373.72 4376.70 2.98
PONDY 207.46 196.02 -11.44
GOA 49.37 48.15 -1.22
Oct-16
Nov-16
Dec-16
5.) Wind Generationin Southern region during Quarter-2
Month AP(MU) KAR(MU) TN (MU) SR (MU)
Oct-16 137.37 256.16 990.24 1383.77
Nov-16 87.76 251.54 196.50 535.80
Dec-16 129.89 297.14 249.42 676.45
5.1)% of wind in the total demand met by Region
Month TOTAL WIND(MUs)
ENERGY MET (MUs)
Oct-16 1383.77 26625.37
Nov-16 535.80 26491.84
Dec-16 676.45 24761.52
%ENERGY MET
5.20
2.02
2.73
0.00
500.00
1000.00
1500.00
2000.00
2500.00
3000.00
AP KAR TN SR
129212 315
656
235369
907
1,511
367
547
1,885
2,798
Oct-16 Nov-16 Dec-16
WIND GENERATION DURING QUARTER -3
020406080100
120
01/Oct/1602/Oct/1603/Oct/1604/Oct/1605/Oct/1606/Oct/1607/Oct/1608/Oct/1609/Oct/1610/Oct/1611/Oct/1612/Oct/1613/Oct/1614/Oct/1615/Oct/1616/Oct/1617/Oct/1618/Oct/1619/Oct/1620/Oct/1621/Oct/1622/Oct/1623/Oct/1624/Oct/1625/Oct/1626/Oct/1627/Oct/1628/Oct/1629/Oct/1630/Oct/1631/Oct/16
Wind (Mu)-->
DAYS
---->
WIN
D GEN
ERAT
ION
IN M
Us Du
ring O
ctobe
r 201
6
051015202530354045
01/Nov/1602/Nov/1603/Nov/1604/Nov/1605/Nov/1606/Nov/1607/Nov/1608/Nov/1609/Nov/1610/Nov/1611/Nov/1612/Nov/1613/Nov/1614/Nov/1615/Nov/1616/Nov/1617/Nov/1618/Nov/1619/Nov/1620/Nov/1621/Nov/1622/Nov/1623/Nov/1624/Nov/1625/Nov/1626/Nov/1627/Nov/1628/Nov/1629/Nov/1630/Nov/16
Wind (Mu)-->
DAYS
---->
WIN
D GEN
ERAT
ION
IN M
Us Du
ring N
ovem
ber 2
016
0102030405060
01/Dec/1602/Dec/1603/Dec/1604/Dec/1605/Dec/1606/Dec/1607/Dec/1608/Dec/1609/Dec/1610/Dec/1611/Dec/1612/Dec/1613/Dec/1614/Dec/1615/Dec/1616/Dec/1617/Dec/1618/Dec/1619/Dec/1620/Dec/1621/Dec/1622/Dec/1623/Dec/1624/Dec/1625/Dec/1626/Dec/1627/Dec/1628/Dec/1629/Dec/1630/Dec/1631/Dec/16
Wind (Mu)-->
DAYS
---->
WIN
D GEN
ERAT
ION
IN M
Us Du
ring D
ecem
ber 2
016
6. SUMMARY REPORT
I)IMPORTANT EVENTS
a)COMMISSIONING OF NEW GENERATING UNITS
SL.NO. STATE/ISGS CAPACITY (MW) TYPE DATE
b)COMMISSIONING OF NEW TRANSMISSION LINES
SL.NO. CONSTITUENT KV LENGTH (kM) DATE
1 POWERGRID 400 187.8 29-12-2016
2 POWERGRID 400 165.45 29-12-2016
3 POWERGRID765 kV
Charged 400 kV 368.84 11-11-2016
4 POWERGRID765 kV
Charged 400 kV 368.84 11-11-2016
5 Inter State 400 kV 197.8 18-11-2216
6 POWERGRID 400 202.7 21-10-2016
7 POWERGRID 400 202.7 21-10-2016
8 COASTAL 400 27-10-2016
9 COASTAL 400 29-10-2016
c)COMMISSIONING OF NEW SUBSTATIONS
SL.NO. CONSTITUENT STATION NAME KV RATIO CAPACITY (MVA) DATE
1 APTRANSCO 400/220kV 315
d)COMMISSIONING OF NEW LINE / BUS REACTORS
SL.NO. CONSTITUENT BUS/LINE CAPACITY (MVAR) DATE
1 POWERGRID BUS 125.00
2 POWERGRID BUS 125.003 POWERGRID BUS 125.004 APTRANSCO BUS 125.005 POWERGRID BUS 125.00
URAVAKONDATRIVANDRAM
400 kV Nagapattinam -Dharmapuri-1
400 kV Nagapattinam -Dharmapuri-2
400 kV Coastal -Tuticorin Pooling Station -2
400 kV Coastal -Tuticorin Pooling Station -2
KUDGINARENDRA
Jammalamadugu ICT1
STATION NAME
HASSAN
VIJAYWADA-VEMAGIRI
VEMAGIRI-GAZUWAKA
Dharmapuri-Tuticorin -1
Dharmapuri-Tuticorin - 2
Urvukonda-Veltoor - 2
STATION NAME
LINE NAME & CKT NO.
अनुभाग-1 / Section-1:
a) ट्ाांसमिशन कने््स्ट्न्ट / Transmission Constraints:
S. No Corridor Season/ Antecedent Conditions
Description of the constraints Figure/ table no.
Has the constraint occurred in earlier quarter?
1 400kV Nellore Pooling Station - Nellore DC line
Whole Year
With Full Generation at SEPL (600 MW), MEPL (300 MW) & TPCIL (2x660 MW) , the 400kV NPS- Nellore D/C flow is usually more than 1500 MW and it has reached up to 1900 MW. With further commissioning of Units at MEPL(stage-2-2x350MW) , the problem will aggravate
Figure - a1 Yes
2
400kV Gooty-Nelamangala line & 400kV Gooty-Somanahalli line
Whole Year
With increase of SR Import to 5900 MW (ATC) and increase of Drawl by Karnataka & due to non-commissioning of 400kV Tumkur-Yelahanka DC line, the flow on 400kV Gooty-Nelamangala & 400kV Gooty-Somanahalli line are loading heavily without N-1 security. Loading on these lines have been partially relieved after 400kV Tumkur-Bidadi/Nelamangala rearrangement.
Figure - a2 Yes
3 400kV Udumalpet-Palakkad DC line
Whole year
Kerala drawl is mainly through 400kV Udumalpet-Palakkad D/C line. 400kV Mysore-Kozhikode DC line commissioned but the flow is limited by the ICT capacity at Kozhikode. Present loading on these lines is in the range of 420-500 MW.
Figure-a3 Yes
4 400kV Hiriyur-Nelamangala DC line
Whole year
With Full generation at Jindal TPS, Bellary TPS, Low generation at UPCL and high wind generation, the flow on 400kV Hiriyur-Nelamangala D/C line is continuously above 550MW. The commissioning of YTPS generators will further aggravate the situation. Non-commissioning of 400kV Tumkur-Yelahanka D/C line and its associated downstream 220kV network also is creating further increase in the line flow.
Figure-a4 Yes
S. No Corridor Season/ Antecedent Conditions
Description of the constraints Figure/ table no.
Has the constraint occurred in earlier quarter?
5 220 kV Bangalore Metro Network
Whole Year
220 kV Metro networks (Bangalore Urban area) are now radialised to prevent overloading of lines. The radialisation decreases the reliability of supply.
- Yes
6
Overloading of 220 kV Shoolagiri- Hosur(TN)- Yerrandahalli- Somanahalli SC line
Whole Year
Somanahalli, Yerrandahalli and Hosur are Industrial areas. 220kV Yerandahalli is connected with Hosur(TN) and Somanahalli. Normally, 220kV Yerandahalli is split and part of its load is fed from Hosur (TN) as the Entire load cannot be met from either side (Somanahalli or Hosur). The line flow on this line is also causing high flows on Shoolagiri-Hosur 230 kV S/C line.
- Yes
7
220 kV Sharavathy-Shimoga lines (3 nos) and 220 kV Sharavathy-Talaguppa line (3Nos.).
During full generation in Sharavathi
With full generation at Sharavathy HEP (>900 MW) there is no N-1 reliability on 220 kV Sharavathy-Shimoga lines and With re-arrangement of circuits at Sharawathi, now there are 3 circuits to Talaguppa. With this the constraint relieved some extent.
- Yes
8
Constraints for Rayalaseema TPS Generation Evacuation
Whole Year
The Southern AP loads have increased and with increased generation at Rayalaseema TPP ( 5 units on bar at present , 220 MW each and 5th unit has been added without augmenting the evacuation system which was designed for 2 units of 220 MW) the line loadings on the following 220 kV lines are of concern, 220kV Chinakampalli-Renigunta S/C, 220kV Chinakampalli-Rajampeta S/C, 220kV Chinakampalli-Kalikiri S/C line, 220kV RYTPP-Chinakampalli D/C line and 220kV Tadikonda-Parchur - Ongole S/C line
- Yes
9
Transformation Capacity at 400/220kV Kozhikode SS
Whole Year
400kV Mysore-Kozhikode DC line is commissioned without enough Transformation capacity at 400/220kV Kozhikode, which became bottle neck for import of power in North Kerala.
- Yes
S. No Corridor Season/ Antecedent Conditions
Description of the constraints Figure/ table no.
Has the constraint occurred in earlier quarter?
10 Constraints in Nagjheri PH evacuation
Whole Year
The 220kV Nagjheri – Ambewadi DC, 220kV Ambewadi – Narendra DC, 220kV Kaiga – Kodasally SC & 220kV Kadra – Kodasally SC lines are severely over-loaded. Re- conducturing of the above lines to HTLS is suggested.
11 Constraints in Chennai 230kV System
Whole Year
230kV Alamatty-Manali DC line, 230kV Manali-koratur, 230kV Kalavindapattu-S.PKoil, 230kV Kalavindapattu-Siruseri, 230kV NCTPS-ETPS line are severely loaded.
- Yes
12 Overloaded 220kV Lines in Tamil Nadu
Whole Year
The following lines are heavily loaded in Southern Tamil Nadu 230kV Madurai - Sembatty S/c, 230kV Madurai - Theni S/c , 230kV Pugalur - Mywadi S/c, 230kV Pudanchandai-Pugalur line
- Yes
13
Constraints in 230kV Evacuation lines of MTPS and Kundah complex
Whole year
230kV Kundah PH4-Thudialur line, 230kV MTPS-MTPS-III-Gobi line, 230kV MTPS-Ingur line and 230kV Pugalur4-Mywadi line, 230kV Arasur-
Arasur Dc line
- Yes
14 Constraints in wind Evacuation
During wind
season
230kV Veerannam-Abhishekpatti line, 230kV Karaikudi-Pudukottai line are loaded heavily
during Wind season - Yes
b)
ICT Constraints:
S. No ICT Season/ Antecedent Conditions
Description of the constraints Figure/ table no.
Has the constraint occurred in earlier quarter? Details.
1 400/220kV 2x315MVA ICTs at Gazuwaka SS
Whole Year N-1 condition not satisfied in few
occasions Figure-b1 Yes
2 400/220kV 2x315MVA
ICTs at Vemagiri SS Whole Year
N-1 condition not satisfied in few occasions
Figure-b2 Yes
3 400/220k 3X500 MVA ICTs at Nelamangala
Whole Year N-1 condition not satisfied in few
occasions Figure-b3 Yes
4 400/220kV 3X500 MVA
ICTs at Somanahalli Whole Year
N-1 condition not satisfied in few occasions
Figure-b4 Yes
5 400/220kV 3X500 MVA
ICTs at Hoody Whole Year
N-1 condition not satisfied in few occasions. Second ICT at Hoody
which was under outage since June 2016 revived in Nov 2016
Figure-b5 Yes
6 400/220kV 2X315 MVA
ICTs at Guttur Whole Year
N-1 condition not satisfied in few occasions
Figure-b6 Yes
7 400/220kV 2X315 MVA
ICTs at Hiriyur Whole Year
N-1 condition not satisfied in few occasions
Figure-b7 Yes
8 400/220kV 2X315 MVA
ICTs at Narendra Whole Year
N-1 condition not satisfied in few occasions
Figure-b8 Yes
9 400/230kV 2X315MVA
ICTs at Pugalur Whole Year
N-1 condition not satisfied in few occasions
Figure-b9 Yes
10 400/230kV 2X315MVA
ICTs at Trichy Whole Year
N-1 condition not satisfied in few occasions
Figure-b10 Yes
11 400/230kV 2X315MVA
ICTs at Madurai Whole Year
N-1 condition not satisfied in few occasions
Figure-b11 Yes
12 400/230kV 2X315MVA
ICTs at Thiruvallam Whole Year
N-1 condition not satisfied in few occasions
Figure-b12 Yes
13 400/220 kV 2X315 MVA
ICTs at Kozhikode Whole Year
N-1 condition not satisfied in few occasions
Figure-b13 Yes
c)
Low Voltage:
S. No Nodes Season/
Antecedent Conditions
Description of the constraints Figure/
table no.
Has the constraint
occurred in earlier
quarter?
1 400kV Somnahally SS During peak load
condition Voltages are low during the peak
load condition Figure-c1 Yes
2 400kV Nelamangala SS During peak load
condition Voltages are low during the peak
load condition Figure-c2 Yes
3 400kV Hoody SS During peak load
condition Voltages are low during the peak
load condition Figure-c3 Yes
4 400kV Bidadi SS During peak load
condition Voltages are low during the peak
load condition Figure-c4 Yes
5 400kV Arasur SS During peak load condition & high
wind period
Voltages are low during the peak load condition
Figure-c6 Yes
6 400kV Trichur SS During peak load
condition Voltages are low during the peak
load condition Figure-c7 Yes
7 400kV Palakkad SS During peak load
condition Voltages are low during the peak
load condition Figure-c8 Yes
8 400kV Cochin SS During peak load
condition Voltages are low during the peak
load condition Figure-c9 Yes
9 400kV Trivendrum SS During peak load
condition Voltages are low during the peak
load condition Figure-c10 Yes
d) High Voltage:
S. No Nodes Season/
Antecedent Conditions
Description of the constraints Figure/
table no.
Has the constraint
occurred in earlier
quarter?
1 400kV Vijayawada SS Whole Year Voltages remain very high most
of the time Figure-d1 Yes
2 400kV Vemagiri SS Whole Year Voltages remain very high most
of the time Figure-d2 Yes
3 400kV Gooty SS Monsoon period
and off peak period
Voltages remain very high most of the time
Figure-d3 Yes
4 400kV Kurnool SS Monsoon period
and off peak period
Voltages remain very high most of the time
Figure-d4 Yes
5 400kV Nellore Pooling
Station SS Whole Year
Voltages remain very high most of the time
Figure-d5 Yes
6 400kV Sattenapally Whole Year Voltages remain very high most
of the time Figure-d6 Yes
7 400kV VTPS Stage IV Whole Year Voltages remain very high most
of the time Figure-d7 Yes
8 400kV Hyderabad SS Monsoon period
and off peak period
Voltages remain very high most of the time
Figure-d8 Yes
9 400kV Mamidipally SS During off peak Voltages remain very high most
of the time Figure-d9 Yes
10 400kV Srisailam LB SS During off peak Voltages remain very high most
of the time Figure-d10 Yes
11 400kV Malkaram SS During off peak Voltages remain very high most
of the time Figure-d11 Yes
12 400kV Narendra SS Whole Year During Low generation period
and off-peak period 400kV Narendra Voltage are High.
Figure-d12 Yes
13 400kV Karaikudi SS During off peak During Low wind condition and off-peak condition Voltages are very High
Figure-d13 Yes
14 400kV Pugalur SS During off peak During Low wind condition and off-peak condition Voltages are very High
Figure-d14 Yes
15 400kV Sriperumbudur
SS Whole Year
Voltages remain very high most of the time
Figure-d15 Yes
16 765kV Raichur SS Whole Year Voltages remain very high most of the time
Figure-d16 Yes
17 765kV Kurnool SS Whole Year Voltages remain very high most of the time
Figure-d17 Yes
18 765kV Nellore PS Whole Year Voltages remain very high most of the time
Figure-d18 Yes
अनुभाग-2/Section 2:
a) Lines Opened on High Voltage
Sr.No. Name Total Corresponding Nodes
experiencing High Voltages
Graph No.
1 400 kV VEMAGIRI - GOUTHAMI CCCP 2 54 Vijaywada, Vemagiri , Sattennapalli, VTS IV,
Gooty , Kurnool , Nellore Pooling Station,
Mamidipally , Srisailam , Warangal, Malkaram ,
Kaiga, Guttur, Narendra, Tirunelvelli , Madurai,
Kudankulam , Thiruvalam, Pugalur, Nelamangala,
Talaguppa, Hassan, Kudgi
Figure Details E1
2 400kV SRISAILAM-SHANKARPALLY 49
3 400 kV KAIGA - NARENDRA 2 46
4 400 KV KUDGI PG - TUMKUR - 1 46
5 400 KV MAHABOOBNAGAR - URAVAKONDA - 1 46
6 400 KV URAVAKONDA - JAMMALAMADUGU - 1 43
7 400 KV URAVAKONDA - JAMMALAMADUGU - 2 43
8 765 KV KURNOOL - THIRUVALLM 2 42
9 400kV SURYAPET -MALKARAM 40
10 400kV VTPS -MALKARAM 38
11 765 KV KURNOOL - NPS 1 38
12 400 kV HYDERABAD - N'SAGAR 35
13 400 KV DHARMAPURI - TUTICORN PS - 2 32
14 400 kV PUGALUR - kARAIKUDI-2 32
15 400 kV HYDERABAD - KURNOOL 31
16 400 kV VEMAGIRI - GVK (JPD) 1 31
17 400 KV DHARMAPURI - NAGAPATNAM - 1 30
18 400 kV GUTTUR - NARENDRA 2 29
19 400 KV MAHABOOBNAGAR - URAVAKONDA - 2 29
20 400 kV KARAIKUDY - MADURAI 27
21 400 kV VEMAGIRI - GVK (JPD) 2 27
22 400 kV KAIGA - NARENDRA 1 22
23 400 kV Khammam-N'Sagar-2 21
24 400 kV TRICHY - KARAIKUDY 17
25 400 KV GOOTY - TUMKUR - 2 16
26 400 KV KUDGI - NARENDRA - 2 16
27 400 kV VIJAYAWADA - VEMAGIRI 2 15
28 400 KV VTPS IV - SATTENAPALLI 2 15
29 400 kV RAMAGUNDAM - HYDERABAD 4 14
30 400 kV TALAGUPPA - NEELAMANGALA 14
31 400 kV GUTTUR - NARENDRA 1 13
32 400 kV N'SAGAR - MAHABOOB NAGAR 13
33 400 kV VIJAYAWADA - VEMAGIRI 3 13
34 765 KV KURNOOL - THIRUVALLM 1 13
35 765 KV KURNOOL - NPS 2 11
36 400 KV ALAMATHI - THIRUVALLAM-1 9
37 400 KV GOOTY - TUMKUR - 1 7
38 400 KV KUDGI PG - TUMKUR - 2 7
39 400 KV DHARMAPURI - TUTICORN PS - 1 6
40 400 kV KAIGA - GUTTUR 1 5
41 400 KV KAMUDHI - KARAIKUDI 5
42 400 kV KAIGA - GUTTUR 2 4
43 400 kV KHAMMAM - MAMIDIPALLY 2 4
44 400 kV MYSORE - HASAN 1 4
45 400 Kv NELLORE - SPDR-1 4
46 400 kV MAHABOOB NAGAR - RAICHUR 3
47 400 Kv VTPS - SURYAPET 3
48 400 Kv KLVDPT - VALLUR 2 2
49 400 Kv KURNOOL(AP) - GOOTY 2
50 400 Kv NCTPS - VALLUR 1 2
51 400 kV N'SAGAR - CUDDAPPA 1 2
52 400 Kv VTPS - MALKARAM 1 2
53 220 kV KAIGA - KODASALLY 1
54 400 KV DHARMAPURI - NAGAPATNAM - 2 1
55 400 kV HASSAN - NEELAMANGALA 1 1
56 400 KV KAYATHAR - KAMUDHI - 1 1
57 400 kV Khammam-N'Sagar-3 1
58 400 kV KOLAR - HOODY 1 1
59 400 KV KUDGI - KOLHAPUR - 2 1
60 400 KV KUDGI - NARENDRA - 1 1
61 400 kV N P KUNTA - KOLAR 1
62 400 Kv NCTPS - SVCTM-II 1
63 400 kV RAMAGUNDAM - MALKARAM 1
64 400 kV RAMAGUNDAM - WARANGAL 1
65 400 Kv SATTENAPALLI - SRISAILAM 2 1
66 400 kV TALAGUPPA - HASSAN 1
67 400 kV VIJAYAWADA - NELLORE 2 1
68 400 Kv VTPS - NLR 1
69 765 KV RAICHUR - KURNOOL - 2 1
Grand Total 1089
अनुभाग-3/Section 3: Load Growth vis a vis Projections:
The tables are attached as EPS_LGBR_Data_Oct’16-Dec’16.xls. Please note that EPSR17 data has been used for 2007- 09 and EPS 18 has been used for 2009-15.
अनुभाग-4/Section 4: Generation Delayed
S. No Generating Unit Area/ State Proposed
Commissioning Date
Actual/ Likely Commissioning
Date
Transmission Constraint
Caused
1 Kudankulam Unit-2 Tamilnadu Dec-08
Unit-1 CoD in December
2014, Unit-2 Synchronised in
Aug 2016. Expected CoD in
December 2016. Unit-2
not yet declared CoD
Transmission congestion on North-South
corridor.
अनुभाग-5/Section 5: Transmission Addition in the quarter
The section may highlight transmission elements whose delayed/ early commissioning has caused a system constraint
S. No. Transmission Corridor
Proposed Commissioning Date/ Original
Target date
Actual/ Likely Commissioning
Date Transmission Constraint Caused
1 400kV Edamon-Cochin DC line Nov-08 RoW issues 220kV North - South corridor of
Kerala
2 Stage-1 Wind evacuation system of TNEB: 400kv Kanarapatty SS, 400kV Kanarapatty-
Kayathar DC line - -
Congestion on 400/230kV Tirunelveli ICTs, 230kV Kayathar-
Tirunelveli, 230kV Udayathur-Tirunelvelli, 230kV Veerannam-
Tirunelvelli etc.
3 400kV Tumkur-Yelhanka DC line Jun-14 RoW
issues/Dec-17
Constraints on Import from New grid to SR through 765kV Raichur-
Sholapur DC line.
4 400kV Somnahally-Dharmapuri PS Sep-14 RoW
issues/Mar-17 Congestion on S1-S2 Corridor
5 765kV Dharmapuri PS –Tumkur DC line Sep-14 Severe RoW
issues/Mar-17 Congestion on S1-S2 Corridor
अनुभाग-6/Section-6:
Grid Events
The section may detail near miss situations, incidents of multiple elements outage, natural calamities impacting the power system, oscillations observed in the system etc.
Grid Disturbances
Sl. No Event
Outage
Region Generation /
load loss
Category as per CEA Grid
Standards Date Time
1 Complete outage of Sharavathy hydro power station of KPCL.
05-Oct-16 15:35 SR Gen loss : 140 MW
GD-1
2
Complete outage of 230kV Taramani substation of TANTRANSCO.
05-Oct-16 23:09 SR load loss : 200 MW
GD-1
3
Complete outage of 230kV Palladam, 230kV O.K.Mandapam, 230kV Thudiyalur and 230kV Coimbatore.
13-Oct-16 19:58 SR load loss : 500 MW
GD-1
4 Complete outage of 220kV Brahmapuram substation.
15-Nov-16 0:31 SR load loss : 160 MW
GD-1
5
Tripping of running units at Neyveli complex (NLC TS-2 stage-1, NLC TS-1 and STCMS), 400/230kV ICT-1&2 at Trichy (PG) substation and 400/230kV ICT-1&2 at NLC TS-2. Loss of supply to 230kV Thrichy, Samayapuram, Cuddalore, Vilupuram, eechangadu, Perambalur, Alandur, Thanjavur, Thiruvarur, Kadalangudi, Thiruvannamalai and N.P.Kudi substation
25-Nov-16 17:22 SR
Load loss : 1500 MW, Generation loss : 800
MW
GD-1
6 Complete outage of 400kV NLC1EXP Station
11-Dec-16 0:44 SR
Generation loss : 200
MW GD-1
7 Load crash and Generation loss in Chennai area in tamilnadu due to cyclone Varda.
12-Dec-16 12:30 SR
load : 1500 MW,
Generation : 2570
GD-1
8 Complete outage of 400kV Guttur substation of KPTCL
17-Dec-16 19:13 SR Nil GD-1
9 Complete Outage of 220kV Peenya substation of KPTCL
19-Dec-16 23:03 SR Load loss: 350 MW
GD-1
Grid Incidents
Sl. No Event Outage
Region
Generation / load loss
Category Date Time
1 Tripping of HVDC Talcher-Kolar HVDC pole-1
05-Oct-16 23:50 SR/ER ---- GI-2
2
Tripping of 400kV Bus-B, at Srisailam left bank power station, 400kV Srisailam-Kurnool & 400kV Shankarapalli-Srisailam at Srisailam left bank power station.
05-Oct-16 16:46 SR ---- GI-2
3 Tripping of HVDC pole-1 at Bhadrawati 07-Oct-16 17:56 SR/ER ---- GI-2
4 Tripping of HVDC Talcher-Kolar pole-1 10-Oct-16 16:35 SR/ER ---- GI-2
5
Tripping of 230kV Bus-1 (400/230kV ICT 5 LV, Manali-1, Mosur, NCTPS, Thiruverkadu) at 230kV Alamathy Substation of TANTRANSCO
12-Oct-16 11:26 SR ---- GI-1
6 Tripping of Running units at Rayalaseema TPS-1, 3 and 5
13-Oct-16 16:56 SR Gen loss : 510
MW GI-2
7
Multiple trippign at NLC TS-2 power station (400kV Bus-2, 400kV NLC TS2 -Salem-2, 400kV NLC TS2 -NLC1Exp, 400kV NLC TS2 -NLC2Exp, 400/230kV ICT#1, NLC-II unit#4 and #5)
27-Oct-16 10:30 SR Gen loss :390
MW GI-2
8 Tripping of 400 kV NTPL - TTRNPS-1, 400 kV NTPL - TTRNPS-2 and unit#1 of NTPL
04-Nov-16 15:37 SR Gen loss= 350MW
GI-2
9 Tripping of 400/220 kV ICT-1, 2 and 3 @ Somanhalli
08-Nov-16 16:11 SR Load loss=
700MW GI-1
10 Tripping of VTPS Units- 2, 3 and 6 08-Nov-16 18:31 SR Gen loss= 480MW
GI-1
11 Tripping of VTPS Units- 1 to 6 12-Nov-16 10:26 SR Gen loss= 950MW
GI-1
12 Tripping of HVDC BHADRAVATHI POLE 2
21-Nov-16 1:14 SR ---- GI-2
13
Tripping of 230kV Bus-1 and connected 230kV elements (230kV Trichy 1, Tanjore 1, ICT-1, & Bus coupler CB) at 230 kV Alandur substaion of TANTRANSCO
09-Dec-16 15:40 SR --- GI-1
14 Tripping of 230kV Bus-1 and connected 220kV elements at 220kV Cudappah substaion of APTRANSCO
24-Dec-16 0:04 SR --- GI-1
15 Tripping of 220kV Bus (Western) at 220kV Chikodi substation of KPTCL
25-Dec-16 0:44 SR 230 MW GI-1
b) Frequency Response Characteristics
S. No Event Change in
Frequency(Hz)
Change in load(-)/
generation (+)(MW)
Frequency Response
Characteristics ( MW/Hz)
1
765 kV Lalitpur-Fatehabad and Unit 2 at Lalitpur tripped at 15:39 hrs.Unit#1 was then immediately backed down and was running under house load and at 15:45 hrs Unit
1 also tripped. Lalitpur went under black out. Total generation loss and load loss was approximately 1200
MW and 90 MW respectively.
-0.17 0 2262
2
HVDC Talcher-Kolar Pole-1 tripped at 23:50 hrs on 05-10-2016 due to Thyristor failure at Talcher end. Pole-2
successfully changed over to Metallic return mode, with power flow of 920 MW. HVDC Talcher Kolar SPS 1
operated resulting in load shedding of 930 MW in SR.
0.11 -930 4409
3 Due to multiple tripping at Dadri at 10:50 hrs, 1450 MW generation loss took place causing frequency fall by 0.07
Hz -0.07 0 1996
4
At 06:02 Hrs all running units in Anpara generation complex tripped due to tripping of 400kV Anpara-
Sarnath D/C. Generation loss of 2300 MW occurred. At the same time Vindhyachal Block-1 tripped due to DC
Over current protection.
-0.26 0 4198
5
On 23.12.2016, at 0127 hrs,all 400 kV lines from Kishenpur substation tripped except 400 kV Moga-Kishenpur-II which led to complete Valley(Kashmir)
system collapse.Total Load loss in J&K was about 1200 MW and Generation loss was of about 250MW(Uri-I-
40MW,Uri-II-38MW,Baghlihar-125MW,JK Hydro-30MW).
0.11 0 2416
Other issues:
If the fault level has crossed 32 kA, the buses may also be highlighted. DR outputs, if any, for actual event
illustrating this to be attached.
o With Full generation at MAPS & Bhavni and with interconnection, the Fault MVA touching 25kA, the
rated capacity of breaker.
o The substations where fault level exceeds 40kA are as mentioned below:
400kV Nellore (PG) 400kV Nellore (AP) 400kV Tiruvalum (TN) 400kV Tiruvalum (PG) 400kV Nellore PS (PG)
Any substation layout which affected grid operation adversely could also be highlighted.
o It is recommended to have uniform rating of LV/400kV for Generator Transformers connected to 400kV grid directly then only optimization of tap position give fruitful results.
o Substations where parallel circuits are on the same diameter are as mentioned below: At 400kV Alamatty SS, Vallur D/C, Thiruvalum D/C, SV Chatram D/C, NCTPS D/C and 400/220kV
ICT-1&2 are on the same diameter. At 400kV Alundur SS, 400/220kV ICT-1&2 are on the same diameter. At 400kV Hinduja SS, 400kV KV Kota D/C and 400kV Kalpakka D/C are on the same diameter. At 400kV Kayathar SS, 400kV Karaikudi D/C and 400/230kV ICT-1&2 are on the same diameter. At 400kV Kudamkulam SS, 400kV Thirunelvelli D/C are on the same diameter.
At Kakatiya TPS, 400kV Warangal D/C and 400kV Gajwel D/C are on the same diameter. At 400kV KTPS SS, 400kV Khammam D/C and 400/220kv, 80MVA ICT & 400/11kV, 50MVA ICT are
on same diameter. At Mettur-III SS, 400kV Tiruvalum D/C, 400kV Arasur D/C and 400/230kV ICT-1 & 2 are on same
diameter. At 400kV Udumalpet SS, 400/220kV ICT 1 & 2 is on same diameter. At 400kV Nunna SS, 400kV Vemagiri Ckt-III&IV are on the same diameter. At 400kV Salem (TN) SS, 400/110kV ICT-1&2 and 400/230kV ICT-1&2 are on the same diameter. At 400kV Simhadri (AP) SS, 400kV Kalpakka ckt-1&2 and Kalpakka ckt-3&4 are on the same
diameter. At 400kV Simhadri Stg-2 SS, 400kV Vemagiri D/C and 400kV Gazuwaka D/C are on the same
diameter. At 400kV SV Chatram SS, 400/110kV ICT-1&2, 400kV NCTPS D/C , 400kV Alamaty D/C and
400/230kV ICT 1&2 are on the same diameter. At 400kV VTS-IV SS, 400kV Sattenpalli D/C on same diameter. At 400kV Ramagundam SS, both Chandrapur circuits are on same Dia. At 400kV Gooty SS, both Nellore PS circuits are on same Dia.
o In future, it is recommended to avoid parallel circuits on the same Dia for reliability purposes.
Many KPTCL Stations at 220 kV level are operated as single bus. Many State 220 kV stations do not
have bus bar protection. These issues are being taken up at PCC meetings.
Vallur TPS (1500 MW) and NCTPS-II (1200MW) generation is connected at 400kV Bus and No 230kV path is
available to give start up supply in case of Blackout. So there is a need to provide 230kV path.
Kudankulam Nuclear Power Station (2 X 1000MW) generation is connected at 400kV Bus and on 230kV side it
has to depend on small Hydro generation for startup supply in case of blackout. The same needs to be
enhanced.
Absence of LVRT feature in wind turbines:
o It is observed that wind generation about 500 to 1000MW in Tamilnadu control area pulls out
during a delayed fault clearance of fault in grid (fault in 400/230 or 110kV network in
Tamilnadu).
o The sudden wind loss resulted in increase of power flow on 765kV Solapur Raichur lines-1&2
and resulting in SPS operation
Presently the interstate line between Karnataka and Telangana 220kV Raichur TPS - Jurala SC is being
operated in radial mode. Operating this line in grid mode would improve the reliability of system.
The following Interregional links has to be explored for import of power by deficit region,
o 220kV Upper Sileru-Balimela S/C line
National HVDC project of Lower Sileru-Barasoor line right of way has to be used for New inter connection
between SR & NEW Grid.
Due to non-commissioning of NGR bypass scheme, the conversion of line reactor into bus reactor is not
possible in the following lines, unless line shutdown is taken and jumper rearrangement works are done
which will take about 3 – 4 hours.
o 765 kV Kurnool-NPS-1&2
o 765 kV Kurnool-Thiruvalam-1&2
o 765 kV Nagapattinam – Dharmapuri 1 & 2 (Charged at 400kV)
o 765 kV Tuticorin PS – Dharmapuri 1 & 2 (Charged at 400kV)
Presently one line each of 765 kV Kurnool-NPS DC and 765 kV Kurnool-Thiruvalam DC are kept open due to
high voltage.
230kV MAPS – Bhavini line (80 MVA) is used for only startup purpose is always kept open. 230kV
Acharapakkam – Villupuram is open to avoid over-loading of 230kV Kalpakkam – Acharapakam S/C line.
230kV MAPS is left with only two sources i.e. 230kV MAPS - Arni SC & 230kV MAPS - SP Koil DC.
SPS Operations:
o Inter-Regional SPS operations:
o HVDC SPS operations:
o Intra-Regional SPS operations:
o SPS Mal operation: Details of SPS mal operation are given below:
Sl No Date Time SPS Operation
Total Load relief in SR (MW)
1 21-Oct-16 12:42
SPS for Kozhikode ICT-SPS signal received at 220kV Areakode, since
bus coupler was in open condition, no disturbance (Maloperation:
While taking ICT#1 for CB testing, SPS acted)
0
2 21-Oct-16 15:43
SPS for Kozhikode ICT-SPS signal received at 220kV Areakode and
kanhirode substations, resulting in the radial operation of Northern
Kerala (Maloperation: While taking ICT#1 for CB testing, SPS acted)
0
3 22-Oct-16 7:52
SPS signal (code-4) pertaining to 400kV Wardha-Parli/ 400kV Parli-
Solapur SPS received from Raipur to Kolar. Maloperation as no SPS
had operated in W.R
360
4 23-Oct-16 9:01
SPS for Kozhikode ICT-SPS signal received at 220kV Areakode and
kanhirode substations, resulting in the radial operation of Northern
Kerala (Maloperation: SPS acted during the switching off of ICT#2
for permit to work)
0
Sl. No. SPS (with logic) Total no. of Operations
1 SPS-1( 765 kV Solapur-Raichur D/C>2500 MW) Nil
Sl. No. SPS (with logic) Total no. of Operations
1 TK-1 (Talcher – Kolar) 1
2 TK-3 (Talcher – Kolar) Nil
Sl. No. SPS (with logic) Total no. of Operations
1 UPCL ICT SPS 1
Line flow Graphs
Figure-a1:
Figure-a2:
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
MW
% of Time
Load Duration Curve of 400kV Nellore PS-Nellore DC Line
OCT-2016 NOV-2016 DEC-2016
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
MW
% of Time
Load Duration Curve of 400kV Gooty - Nelamangala Line
OCT-2016 NOV-2016 DEC-2016
Figure-a2:
Figure-a3:
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
MW
% of Time
Load Duration Curve of 400kV Gooty - Somnahalli Line
OCT-2016 NOV-2016 DEC-2016
050
100150200250300350400450500550600650700750800850900950
10001050110011501200
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
MW
% of Time
Load Duration Curve of 400kV Udumalpet-Palakkad DC Line
OCT-2016 NOV-2016 DEC-2016
Figure-a4:
050
100150200250300350400450500550600650700750800850900950
10001050110011501200
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
MW
% of Time
Load Duration Curve of 400 kV Hiriyur-Nelamangala D/C Line
OCT-2016 NOV-2016 DEC-2016
ICT flow Graphs
Figure-b1:
Figure-b2:
0
50
100
150
200
250
300
350
400
450
500
550
600
650
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Gazuwaka ICTs Flow (2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Vemagiri ICTs Flow (2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N - 1 Contingency
Figure-b3:
Figure-b4:
050
100150200250300350400450500550600650700750800850900950
100010501100115012001250130013501400
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Nelamangala ICTs Flow (3x500 MVA)
OCT-2016 NOV-2016 DEC-2016
050
100150200250300350400450500550600650700750800850900950
10001050110011501200
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Somanahalli ICTs Flow (3x500 MVA)
OCT-2016 NOV-2016 DEC-2016
Figure-b5:
Figure-b6:
050
100150200250300350400450500550600650700750800850900950
100010501100115012001250130013501400
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Hoody ICTs Flow (3x500 MVA)OCT-2016 NOV-2016 DEC-2016
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Guttur ICTs Flow(2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Violation
Figure-b7:
Figure-b8:
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Hiriyur ICTs Flow (2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Narendra ICTs Flow (2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
Figure-b9:
Figure-b10:
0
50
100
150
200
250
300
350
400
450
500
550
600
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/230kV Pugalur ICTs Flow(2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Violation
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/230kV Trichy ICTs Flow(2x315 MVA)OCT-2016 NOV-2016 DEC-2016
Figure-b11:
Figure-b12:
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/230kV Madurai ICTs Flow (2x315 MVA)OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
0
50
100
150
200
250
300
350
400
450
500
550
600
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/230kV Thiruvallam ICTs Flow (2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
Figure – b13:
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
MW
% of Time
Load Duration Curve of 400/220kV Kozhikode ICTs Flow(2x315 MVA)
OCT-2016 NOV-2016 DEC-2016
N-1 Contingency
Voltage Graphs
Figure-c1:
Figure-c2:
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Somnahally Voltage
OCT-2016 NOV-2016 DEC-2016
350
355
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Nelamangala Voltage
OCT-2016 NOV-2016 DEC-2016
Figure-c3:
Figure-c4:
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Hoody Voltage
OCT-2016 NOV-2016 DEC-2016
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Bidadi Voltage
OCT-2016 NOV-2016 DEC-2016
Figure-c5:
Figure-c6:
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Arasur VoltageOCT-2016 NOV-2016 DEC-2016
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Trichur Voltage
OCT-2016 NOV-2016 DEC-2016
Figure-c7:
Figure-c8:
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Palakkad VoltageOCT-2016 NOV-2016 DEC-2016
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Cochin VoltageOCT-2016 NOV-2016 DEC-2016
Figure-c9:
Figure-d1:
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Trivendrum VoltageOCT-2016 NOV-2016 DEC-2016
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Vijayawada Voltage
OCT-2016 NOV-2016 DEC-2016
Figure-d2:
Figure-d3:
395
400
405
410
415
420
425
430
435
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Vemagiri VoltageOCT-2016 NOV-2016 DEC-2016
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Gooty VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d4:
Figure-d5:
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Kurnool Voltage
OCT-2016 NOV-2016 DEC-2016
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Nellore Pooling Station VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d6:
Figure-d7:
390
395
400
405
410
415
420
425
430
435
440
445
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Sattenapally Voltage
OCT-2016 NOV-2016 DEC-2016
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV VTPS - IV VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d8:
Figure-d9:
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Hyderabad Voltage
OCT-2016 NOV-2016 DEC-2016
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Mamidipalli VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d10:
Figure-d11:
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Srisailam LB VoltageOCT-2016 NOV-2016 DEC-2016
400
405
410
415
420
425
430
435
440
445
450
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Malkaram VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d12:
Figure-d13:
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Narendra VoltageOCT-2016 NOV-2016 DEC-2016
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Karaikudi VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d14:
Figure-d15:
380
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Pugalur VoltageOCT-2016 NOV-2016 DEC-2016
385
390
395
400
405
410
415
420
425
430
435
440
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 400 kV Sriperumbudur VoltageOCT-2016 NOV-2016 DEC-2016
Figure-d16:
Figure-d17:
740
745
750
755
760
765
770
775
780
785
790
795
800
805
810
815
820
825
830
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 765 kV Raichur VoltageOCT-2016 NOV-2016 DEC-2016
720
730
740
750
760
770
780
790
800
810
820
830
840
850
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 765 kV Kurnool Voltage
OCT-2016 NOV-2016 DEC-2016
Figure-d18:
750
760
770
780
790
800
810
820
830
840
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%
KV
% of Time
Duration Curve of 765 kV Nellore Pooling Station VoltageOCT-2016 NOV-2016 DEC-2016
Figure-E1
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