director (operation) - powergrid intranet minutes/wr... · as suggested by cea in its report on...
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1. Member (PS) Central Electricity Authority Sewa Bhawan, R.K.Puram New Delhi-110 066
2. The Member Secretary Western Regional Power Committee MIDC area, Marol, Andheri East, Mumbai 400 093
3. 3.
Chief Engineer (PSP&A - I) Central Electricity Authority Sewa Bhawan, R.K.Puram New Delhi-110 066
4. 4.
Director (Operation) Maharashtra State Electricity Transmission Co. Ltd., 4th Floor, “Prakashganga”, Plot No. C-19, E-Block, Bandra – Kurla Complex, Bandra(East), Mumbai- 400051
5. 5.
Managing Director Gujarat Energy Transmission Corp. Ltd, Sardar Patel Vidyut Bhawan, Race Course, Vadodara -390 007
6. 6.
Chairman & Managing Director Madhya Pradesh Power Transmission Co. Ltd., Block No. 3, Shakti Bhawan, Rampur, Jabalpur-482 008
7. 7.
Managing Director Chhattisgarh State Power Transmission Co. Ltd., Dangania, Raipur- 492 013
8. 8.
The Chief Engineer Electricity Department The Government of Goa, Panaji
9. 9.
Executive Engineer Administration of Daman & Diu (U.T.) Department of Electricity Moti Daman - 396220
10. 10.
Executive Engineer Electricity Department UT of Dadra & Nagar Havelli, Post Naroli-396 235, Silvassa
11. 11.
Chief Executive Officer POSOCO B-9, Qutab Institutional Area, Katwaria Sarai, New Delhi-110 016
12. 12.
General Manager Western Regional Load Despatch Centre F-3, M.I.D.C. Area, Marol, Andheri East, Mumbai-400 093
13. Executive Director (Engg.) NTPC Ltd., Engg. Office Complex, Plot no. A-8A, Sector-24, Post Box. 13, Noida 201 301 (U.P)
14. 14.
Chief Engineer (Transmission) Nuclear Power Corporation of India Ltd., 12th Floor, North wing, Vikram Sarabhai Bhawan, Anushakti Nagar, Mumbai-400 094
15. Addl. Chief Engineer (Technical Cell), Chhattisgarh State Power Trading Company Ltd., 2nd Floor, ”Vidyut Seva Bhawan”, Dangania, Raipur
16. Smt. Suchitra Maggon Addl. General Manager, NTPC Ltd. NTPC Bhawan, Scope Complex, 7, Institutional Area, Lodhi Road, New Delhi-110003
17. Sh. Manu Srivastava Chairperson Rewa Ultra Mega Solar Ltd. “Urja Bhawan”, Link Road No. 2, Shivaji Nagar, Bhopal 462016
18. Sh. Rakesh Shah, Director (Regulatory Affairs) Sun Edison Energy India Pvt. Ltd., 10th Floor, Menon Eternity, Old. No. 110, New No. 165, St. Marys raod, Alwarpet, Chennai – 600018,
19. Sh. Jignesh Langalia Associate General Manager Adani Green Energy Ltd. Adani House, Nr. Mithakhali Circle, Navrangpura, Ahmedabad, Gujarat
20. Sh. K. Saibaba Chief General Manager (Comml., & RAC) Telangana State Southern Power Distribution Corporation Ltd., Corporate Office, 6-1-50, Mint Compound, Hyderabad – 63, Telangana
21. Sh. R. Ranjan Chief Executive Officer, National High Power Test Laboratory Pvt. Ltd., CORE-8, 1st Floor, SCOPE Complex, 7, Institutional Area, Lodhi Road, New Delhi – 110003
22. 1. Sh. Ravi Arya Head Commercial (Thermal Projects) MB Power (M.P.) Ltd. 235, Okhla Industrial Estate Phase-III, New Delhi,110020
23. Sh. Naresh Panchal Head & GM, Suzlon Power Infrastructure Ltd., One Earth, Tree Lounge, L-1, R/W, Hadapsar, Pune – 411 028
24. Sh. N. Ramakrishnan Sr. GM – Business Development KSK Mahanadi Power Company Ltd.
2. 8-2-293/82/A/431/A Road No.22, Jubilee Hills, Hyderabad- 500033, Andhra Pradesh, India
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Agenda for 22nd Meeting of WR Constituents regarding Connectivity
& Long-Term Access applications in Western Region
----------------------------------------------------------------------------------------------------------------
1. Confirmation of the minutes of 21st Meeting of WR Constituents regarding
Connectivity & Long-Term Access applications in Western Region held on 17th
July, 2015 at NRPC, Katwaria Sarai, New Delhi
Members may deliberate and confirm the minutes of the 21st Meeting of WR
Constituents regarding Connectivity & Long-term Access applications in Western
Region
2. Connectivity (6x660 MW) and LTA (4x660MW) Application of Barethi STPS of
NTPC
The subject application was discussed in the 21st LTA & Connectivity meeting of WR
constituents held on 17-07-2015 wherein CEA stated that the transmission system
for power transfer from Barethi STPS to Northern Region may be planned jointly by
CEA and CTU as new corridors between WR and NR are already under planning
stage. Members agreed with the suggestion and it was decided to firm up the system
after joint studies and LTA may be granted thereafter.
Here, it is also to mention that M/s NTPC, in view of stage-wise commissioning of the
project, intends to avail connectivity for full quantum of power (6x660=3960MW) and
LTA for phase-1 (4x660=2640MW) of the generation project which is scheduled to
be commissioned progressively from Dec-2019.
Load flow studies have been carried out for various alternatives and following
transmission system is proposed for connectivity of Barethi STPS (6x660 MW) with
the grid:
Barethi STPS - Orai 765kV D/c line
As suggested by CEA in its report on evolution of Transmission system for Barethi STPP
of NTPC, LILO of one circuit of Satna – Gwalior 765kV 2xS/c line at Orai may be
extended to Barethi STPS so as to form Barethi STPS – Orai 765kV D/c line and Satna –
Gwalior 765kV S/c line may be straightened.
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Here, it is to mention that LILO of one circuit of Satna – Gwalior 765kV 2xS/c line at Orai
is under implementation by POWEGRID and extension of this LILO upto Barethi STPS
shall be implemented through TBCB route. In such case, there shall be two owners for
the same line.
Considering above, following is proposed for connectivity:
Transmission System for Connectivity:
Barethi STPS - Orai 765kV D/c line (Approx Length: 180 Kms.)
(LILO of one circuit of Satna – Gwalior 765kV 2xS/c line at Orai may be extended
to Barethi STPS so as to form Barethi STPS - Orai 765kV D/c line and Satna-
Gwalior 765kV S/c line may be straightened)
Reactive Compensation
Barethi STPS - Orai 765kV D/c line such formed shall have 240 MVAR fixed line
reactor in one circuit at Orai end. 240 MVAR fixed line reactor in other circuit at
Orai end need to be provided under the present scheme.
Further, provision of following is proposed at Barethi STPS switchyard under the
scope of NTPC Ltd.:
765kV line bays: 2 nos.
765kV bus reactor: 2x240 MVAR
765kV switchable line reactor: 2x240 MVAR in Barethi STPS - Orai 765kV D/c
Provision of space for additional 4 nos. 765 kV line bays as well as 4 nos. 765kV
switchable line reactors may be kept as future provision
Further, Long-term Access has been sought by M/s NTPC Ltd. for 4x660MW from
Barethi STPS.
Salient features of the application are as under:
Sl. Particulars Application Details
1. LTA Quantum 2488.2MW
2. Date from which LTA is required 01.07.2021
3. Date upto which LTA is required 30.06.2046
4. Location of Generating station Madhya Pradesh (WR)
5. Connectivity with the grid STU - CTU interconnections in WR
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6. Drawee Entities* MPPMCL (MP/WR) – 1244.1MW
UPPCL (UP/NR) – 870.87MW
*In addition to the above allocations to various
beneficiaries, unallocated quota of 373.23MW
shall be allocated by GoI from time to time.
Further, computation has been done based on
tentative allocation as per existing GoI
guidelines. Final allocation shall be done by
MoP.
System Studies indicate the following transmission system requirement for transfer
of power from Orai:
Orai – Bareilly 765kV D/c line
Transmission System Strengthening for LTA:
Accordingly, following transmission system is proposed to be associated with Barethi
STPS:
Orai – Bareilly 765kV D/c line (Approx Length: 300 Kms.)
Power dispersal in WR shall be through displacement as Orai in NR is already being
connected to Jabalpur Pool in WR. Strengthening in NR beyond Bareilly shall be
discussed and finalised in the forthcoming Standing Committee Meeting of Northern
Region constituents.
Reactive Compensation
240 MVAR Switchable Line Reactors in each circuit at both ends of Orai –
Bareilly 765kV D/c line (Approx Length: 300 Kms.)
Members may discuss and decide.
3. Connectivity & LTA application for 750 MW by REWA Ultra Mega Solar (RUMS) Ltd. for development of Solar Park in Rewa, Madhya Pradesh Government of India has taken an initiative for development of Ultra Mega Solar
Power parks in various parts of the country. As part of above initiative, an ultra-mega
solar Power park of 750 MW capacity is being developed by M/s Rewa Ultra Mega
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Solar Ltd [JVC of SECI & MP Urja Vikas Nigam Ltd (MPUVNL)], a Solar Park
developer (SPD), in Rewa district of Madhya Pradesh.
Ministry of Power vide letter dated 08.01.15 & 04.08.15 intimated POWERGRID to
take up the implementation of transmission line and pooling station from the solar
generating parks (9 solar parks with capacity 7020 MW) including Rewa Ultra Mega
Solar park in MP, on compressed time schedule basis as well as transmission
system connecting solar parks to ISTS be declared as part of ISTS.
In line with the CERC regulatory requirement, MNRE has already issued
authorization to M/s RUMS, a Solar power Park Developer (SPPD), to apply for
Connectivity/LTA for its 750 MW Rewa Solar Park in MP. MNRE also authorized
SPPD to undertake infrastructural activities including arrangement for connectivity on
behalf of the solar power generators in the park.
Further, M/s RUMS has also submitted an undertaking to bear all liabilities on behalf
of the Solar Project generators to be set up in the Solar Park, as per the CERC
regulations.
In view of the above, following transmission system for evacuation of power from M/s
RUMS Ltd was agreed in-principle during the 38th Standing Committee Meeting of
Power System Planning in WR held on 17.07.2015.
Establishment of 400/220kV, 3x500 MVA Pooling station at Rewa
LILO of Vindhyachal STPS – Jabalpur 400kV 2nd D/c line (circuit - 3 & 4) at Rewa
Pooling Station
1x125 MVAr bus reactor at Rewa Pooling Station
6 Nos. 220kV Line bays at Rewa Pooling station (for its interconnection with solar
park)
However, it was decided that the implementation is to be taken up only after receipt
of the LTA application.
Subsequently, Connectivity & LTA application for 750 MW has been made by M/s
RUMS Ltd. Salient features of the application are as under:
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Sl. Particulars Application Details
1. Capacity for which connectivity
is required
750MW
2. Date from which connectivity is 31.03.2017
3. Quantum for which LTA
required
750MW
4. Date from which LTA is required June 30, 2017
5. Date upto which LTA is required June 29, 2042
6.. Location of Generating station Rewa, Madhya Pradesh (WR)
7. Drawl of Power WR : 450MW; NR:300MW
Accordingly following transmission system for Connectivity & LTA is proposed.
Transmission System for Connectivity:
The following transmission system for connectivity is proposed.
RUMS Ltd. switchyard – Rewa Pooling Station 220kV 3xD/c line alongwith
associated bays at Solar Park
It is understood that the above transmission system shall be implemented by the
applicant.
Transmission System for LTA:
RUMS has applied for LTA of 750MW in Nov’15 with target region as WR-450MW
and NR-300MW. System studies indicate that 450 MW power transfer within WR
may be effected through displacement with above proposed transmission system.
However, system strengthening is required for 300 MW power transfer to NR which
shall be deliberated upon in Item No. 5. In addition to the strengthening identified in
Item No. 5, the following transmission system shall be required for LTA:
Establishment of 400/220kV, 3x500 MVA Pooling station at Rewa
LILO of Vindhyachal STPS-Jabalpur 400kV 2nd D/c line (ckt-3&4) at Rewa PS
1x125 MVAr, 420 kV Bus Reactor at Rewa Pooling Station
6 Nos. 220kV Line bays at Rewa PS (for RUMS-Rewa PS 220kV 3xD/c)
Members may discuss and decide.
6
4. LTA application of M/s SEI Sunshine Power Private Limited (SSPPL) for Grant of Long Term Access for transfer of 180 MW from Solar PV Projects located in Shivpuri District of Madhya Pradesh to Delhi
M/s SSPPL has applied for transfer of 180MW power from the Solar PV Projects in
Shivpuri, Madhya Pradesh to Delhi. The point of injection is Shivpuri 220 kV sub-
station of MPPTCL. LTA has been sought from 30.09.2016 to 30.09.2041 (25 years)
for 180 MW from Madhya Pradesh to Delhi. However NOC has been issued for 20
years from date of commercial operation of generating project. Similarly as per the
PPA attached “the agreement shall remain into force for a period of 20 years from
the date of commissioning of station as a whole/commencement of supply of total
contracted capacity by Seller (which as per clause 4.1 of PPA is 30.06.2017).” In
view of the same, LTA is proposed to be processed considering 20 years’ time-
frame. As entire 180 MW is to be transferred from Madhya Pradesh in WR to Delhi in
NR, system strengthening is required which shall be deliberated upon in Item No. 5.
5. Evolution of New Corridor for transfer of power from WR to NR In order to assess the transmission requirements to meet the deficit conditions in
Northern Region (NR), the import requirement of NR needs to be assessed first.
Here, import requirement has been assessed on Target LTA basis as given below.
5.1 LTA Requirement Based Approach In addition to above mentioned generation projects, few more generation projects
located in WR & SR have applied for grant of Connectivity / LTA with power transfer
to NR. The present study is for evolution of transmission system based on Long term
access applications. Accordingly, total power transfer requirement towards NR have
been worked out from LTA applications i.e. by summing up the quantum of power
the various generations have targeted/allocated for NR. The total power transfer
requirement towards NR, except those mentioned in Table – 1 below, is envisaged
to be about 25922MW (15046MW from WR, 9419MW from ER and 1457MW from
SR). If uncertain/abandoned/closed projects are excluded, the total power transfer
requirement towards NR comes down to around 23243MW (13599MW from WR,
8474MW from ER and 1170MW from SR). Here, it is to mention that LTA quantum
that is envisaged to be surrendered by CSPTrCL has not been deducted in the
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calculation above as corresponding generation projects are still on and treatment of
the same needs further deliberation, like total relinquishment by CSPTrCL or transfer
of LTA quantum to IPPs (if they are willing), for overall optimisation subject to
regulatory direction.
In addition to the import requirement of NR assessed above, additional requirement
of about 2400 MW power transfer from WR to NR will be incident from following
generation projects in WR with beneficiaries in NR.
Table – 1
Sl No.
Generation Projects Additional Allocation to NR
(MW)
Discussed in
1 MB Power (MP) Ltd. 200 (169MW
Firm) 20th WR LTA/Con
Meeting on 17.02.2015 2 MB Power (MP) Ltd. 144
3 DB Power Chhattisgarh Ltd.# 235 (Firm) 21st WR LTA/Con
Meeting on 17.07.2015
4 Rewa Ultra Mega Solar Ltd. 300
New application (38th meeting of
Standing Committee Power System
Planning in WR held on 17.07.2015)
5 SEI Sunshine Power Pvt. Ltd. 180 New Application
6 Suzlon Power Infrastructure Ltd. (3 applications, location of project in SR)
120 New Application
7 Maruti Clean Coal & Power Ltd * 205 (Firm) 20th WR LTA/Con
Meeting on 17.02.2015;
8 TRN Energy Ltd * 240 (Firm) 20th WR LTA/Con
Meeting on 17.02.2015;
9 KSK Mahanadi Power Company Ltd 1000 (Firm) 20th WR LTA/Con
Meeting on 17.02.2015;
10 Shirpur Power Pvt. Ltd.* 35
21st WR LTA/Con Meeting on
17.07.2015. NOC awaited.
Grand Total
2659MW (i.e. 2539MW from WR & 120MW
from SR)
# DB Power Chhattisgarh Ltd. (DBPCL) vide letter dated 20.10.15 has informed that against
their PPA for 410MW with Rajasthan Discoms (through PTC India Ltd.), Hon’ble RERC
8
has adopted tariff for purchase of 250MW only. The judgement has been challenged by
DBPCL in Hon’ble APTEL and the appeal has been admitted. In view of the above,
DBPCL has requested to keep the application on hold.
* TRN Energy and Maruti Clean Coal & Power Ltd. had submitted LTA applications against
firm PPAs signed with beneficiaries in NR; however same were closed on account of
incomplete applications.
* Application of Shirpur Power Pvt. Ltd. is liable to get closed as NOC from MSETCL is yet to
be submitted.
However, quantum of WR-NR power transfer desired by DBPCL, TRN Energy,
Maruti Clean Coal & Power Ltd. & Shirpur Power Pvt. Ltd. have been taken in the
studies considering that they shall apply afresh.
In addition to above applications, LTA application of Barethi STPS indicates 871MW
power allocation to Northern Region. In view of the above, total power transfer
requirement towards NR may be assessed as below:
23243MW {13599MW from WR, 8474MW from ER & 1170MW from SR} + 3530MW
{3410 MW (2539 + 871 share from Barethi STPS) from WR & 120MW from SR} =
26773MW {17009MW from WR, 8474MW from ER & 1290MW from SR}
5.2 Adequacy of existing / planned Inter-regional corridors to NR The ER-NR interconnection is already very strong and remains underutilised as
generation projects in Northern part of ER have been delayed. Further, since
generation projects in WR (particularly in Chhattisgarh) and Odisha which have
strong connectivity with WR (via Chhattisgarh) have materialised in time, power
tends to take the shortest (least resistance) route to load centres in Northern region
via the WR – NR corridor. Therefore, the WR – NR corridor gets stressed.
The following table summarises the increase in available transmission capacity with
new planned schemes from WR to NR:
9
Table – 2 : Increase in TTC with new planned Inter-regional corridors
Sl. No.
Inter-regional line Increase in TTC/ATC
envisaged
ATC (MW)
WR – NR
1 Existing (with Gwalior-Jaipur) 7750
2 Champa – Kurukshetra HVDC Bipole
5950 13700
4 Jabalpur – Orai 765kV D/c line 2300 16000
In the 36th Standing Committee meeting of WR constituents held on 29.08.2013, it
was decided that since Gujarat (especially Kutch complex) and Rajasthan have huge
renewable generation potential, which by nature has a very small gestation period, it
is essential to plan a high capacity transmission system starting from Bhuj pooling
station (near Kutch region) to Punjab in NR via Rajasthan to facilitate onward
dispersal of power outside Gujarat to other states in NR. It was pointed out that the
IEGC stipulates renewable energy plants to have “MUST RUN” status and shall not
be subjected to “merit order dispatch” principles. It was also agreed that the
renewable generations would be allowed to inject in the ISTS at Bhuj, Banaskantha,
Chittorgarh, Ajmer etc., if they apply for LTA quantum which is atleast 25% of their
installed capacity. Accordingly, the Banaskantha – Chittorgarh 765kV D/c corridor
shall be used for providing LTA to renewable generations envisaged to come up in
Gujarat and has not be considered as additional WR – NR corridor for above
mentioned power transfer.
Further, in the 38th Standing Committee Meeting of WR held on 17.07.2015, CEA
had pointed out the following regarding system studies carried out for planning of
new WR – NR corridor:
The new generation project of 4000 MW in WR, for whom LTA of 2000 MW has
been assumed for NR, has only applied for connectivity and they are yet to apply
for LTA. The corridor (whether WR-SR or WR-NR) needs to be evolved based on
the regions/ target regions specified in the LTA application of the generation
project
In the high renewables cases, increased dispatches from renewable energy
sources in Rajasthan also need to be considered. In the studies high dispatch
has been considered only from renewable energy sources in Gujarat.
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Bishwanath Chariyali- Agra HVDC bipole line has been kept out of service in the
studies which need not be the case as in the 2018-19 time frame power from
hydro
The above issues raised by CEA have been taken into consideration and studies
have been revised considering several factors viz:
Availability of renewable generation in Gujarat & Maharashtra (WR) as well as in
Rajasthan (NR) – Total about 2500MW RE generation considered in low RE case
and about 15000MW RE generation considered in high RE case
Flow on NER – Agra HVDC line – Two cases have been considered: i) With
HVDC line out of service ii) With 2000MW flow on HVDC line
Utilisation of new proposed inter-regional corridors i.e. Vindhyachal Pool –
Allahabad 765kV D/c line and Indore – Chittorgarh 765kV D/c line.
From the studies, it emerges that the WR – NR corridor gets more stressed in the
Low Renewables case than the high renewables case. Studies also indicate that
under the revised scenario, Vindhyachal Pool (WR) – Allahabad (NR) 765kV D/c line
comes out as a better alternative compared to Indore – Chittorgarh 765kV D/c line
proposed earlier for strengthening of WR-NR corridor. Summary of load flow study
cases & results is as given below:
Table – 3
Sl. No.
Case description Total NR Import (from WR & ER)
(MW)
Exhibit #
1 Base Case (Without new applications for NR)
23243 1(a)
2 Base Case with outage of one pole (3000MW) of Champa – Kurukshetra HVDC bipole
23243 1(b)
3 With New Applications With Vindhyachal Pool – Allahabad – Lukhnow 765kV D/c corridor
NER-Agra HVDC out of service
NER-Agra HVDC flow 2000MW
26773
2(a) 2(b)
Load Flow results indicating power flow in various WR-NR corridors are tabulated
below.
11
Case#
Case Description WR-NR
Flow ER-NR Flow
Banaskantha –
Chittorgarh D/c
Gwalior –Jaipur 2xS/c
Agra –Gwalior 2xS/c
Jabalpur – Orai
D/c
Barethi –Orai D/c
Vindhyachal Pool –Allahabad
D/c
1(a) Base Case 14839 8498 1173 1710 2172 2075 - -
1(b)
Base + Champa – Kurukshetra Pole outage (3000MW out)
14113 9304 1341 2109 2731 2593 - -
2(a) Low RE w/o NER-Agra HVDC*
18079 8674 1060 1873 1964 1944 2403 2569
Champa – Kurukshetra Pole outage (3000MW out)
17564 9286 1241 2188 2368 2424 2403 2881
2(b) Low RE with NER-Agra HVDC*
16834 9872 913 1786 1516 1734 2375 2453
Champa – Kurukshetra Pole outage (3000MW out)
16324 10469 1093 2104 1923 2217 2375 2765
*Despatch considered as 2000MW
Note: In addition to above, 6000MW power transfer through ±800kV, Champa –
Kurukshetra HVDC Bi-pole has also been considered.
Based on load flow study results, it is observed that a maximum of about 18000MW
flows on WR – NR corridor route, which is more than the available ATC of 16000MW
after commissioning of Jabalpur – Orai 765kV D/c line. From load flow results, it is
evident that Vindhyachal Pool – Allahabad 765kV D/c line gets fairly loaded even
with NER – Agra HVDC line. Further, the line also helps under outage of Champa –
Kurukshetra HVDC line (3000MW out) by evenly distributing flows on all WR–NR
corridor lines. Accordingly, the following corridor from WR to NR is proposed:
New WR – NR Inter Regional Corridor (linked with new LTA applications, some of
which have already been granted on proposed Indore – Chittorgarh 765kV D/c line)
Establishment of New 2x15000MVA, 765/400kV Substation at Allahabad
Vindhyachal Pool – Allahabad (New) 765kV D/c line
Allahabad (New) – Lukhnow 765kV D/c line
LILO of Sasaram – Fatehpur 765kV S/c line at Allahabad (New)
LILO of Meja – Allahabad 400kV D/c line at Allahabad (New)
The following applicants may be granted LTA to NR on the above proposed WR –
NR corridor:
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Table – 4
Sl No.
Generation Projects Additional Allocation to
NR (MW)
Remarks regarding WR – NR
Strengthening reqd.
1 MB Power (MP) Ltd. 200 (169MW
Firm) Intimation needs to be
revised ; To be granted with
Vindhyachal Pool – Allahabad line
2 MB Power (MP) Ltd. 144
3 Rewa Ultra Mega Solar Ltd 300 To be granted with Vindhyachal Pool –
Allahabad line
4 SEI Sunshine Power Pvt. Ltd. 180 To be granted with Vindhyachal Pool –
Allahabad line
5 Suzlon Power Infrastructure Ltd. (3 applications)
120 To be granted with Vindhyachal Pool –
Allahabad line
6 KSK Mahanadi Power Company Ltd 1000 (Firm) To be granted with Vindhyachal Pool –
Allahabad line
Grand Total 1944MW
Members may discuss and decide.
6. Connectivity Application of Adani Green Energy Ltd. (AGEL)
M/s AGEL has applied for connectivity of its 300 MW Solar Power Plant being
established at Sami in Patan district of Gujarat. The nearest ISTS point to the
proposed Solar power plant is 400 kV Sami Switching Station of Adani Power Ltd.
Keeping in view the capacity of the power station, 220 kV D/c line with high capacity
conductor shall be required for connectivity. Accordingly, the generation project is
required to step up at 220 kV. For connectivity, following 2 alternatives may be
considered:
Alt-1: AGEL - Sami 220 kV D/c (Twin Moose Conductor) line & 2x500 MVA, 400/220
kV ICT at Sami Switching Station
Alt-2: AGEL - Banaskantha (PG) 220 kV D/c (Twin Moose Conductor) line
Here, it is to mention that Banaskantha - Chittorgarh 765 kV D/c corridor has been
planned for evacuation of power from renewable generation in Gujarat. Accordingly,
13
Alt-2 would be more suitable if power is envisaged to be transferred towards
Northern region.
Members may discuss and decide.
7. Revision in the LTA quantum of Chhattisgarh State Power Trading Company
Ltd. (CSPTrdCL).
The matter was discussed in the 21st LTA meeting held on 17-07-2015 wherein CTU
stated that if CSPTrdCL reduces the quantum of power availed from various
generation projects, relinquishment charges in line with CERC regulations will apply
and the same shall be incident on CSPTrdCL. CSPTrdCL assured to revert back.
However, no communication has been received in this regard.
CSPTrdCL may update.
8. LTA Application of Telangana State Southern Power Distribution Company
Ltd. for 2000 MW power transfer from Chhattisgarh to Telangana State
DISCOMs
Telangana State Southern Power Distribution Company Ltd. (TSSPDCL) has applied
for LTA of 2000 MW in the month of February, 2015 for evacuation of 1000 MW
power from Marwa Thermal power Station (Marwa TPS) and another 1000 MW
power from other generating stations in Chhattisgarh i.e. total 2000 MW to the
DISCOMs of Telangana namely Southern Power Distribution Company of Telangana
Ltd. (TSSPDCL) & Northern Power Distribution Company of Telangana Limited
(TSNPDCL). Details of application are as below:
Transmission System for LTA
Total Transfer Capability (TTC) across NEW Grid - SR Grid is expected to be 6650
MW with commissioning of 765 kV D/C Narendra-Kolhapur in Nov’15. Considering
Sl.
No
Applicant Location Date of
Application
Start Date of
LTA
LTA Sought
(MW)
1. Telangana State
Southern Power
Distribution Company
Ltd. (TSSPDCL)
1000 MW at Marwa
STPP connected to
STU & 1000 MW
from CSDCL,
Chhattisgarh
Feb, 2015 01.03.2015 2000
14
Transmission Reliability Margin (TRM) of 750 MW, the Available Transfer Capability
(ATC) is 5900 MW. Out of this, 5711 MW has already been allocated under LTA.
Further, LTA of 727 MW has been granted to Dec’14 LTA applicants subject to
commissioning of Angul-Srikakulam-Vemagiri 765kV D/c line along with “Constraints
in 400kV bay extensions at Vemagiri” or “Wardha - Maheshwaram 765kV D/c link
with anchoring at Nizamabad”. After considering all LTA/MTOA allocations upto
June’15 including Dec’14 LTA applications, total import requirement to southern
region works out to be 6438 MW. Hence in the studies, including TRM of 750 MW,
SR import of 7188 MW (6438 + 750) has been considered in the base case. With
LTA of 2000 MW from NEW Grid to SR Grid, total import of about 9200 MW (7188 +
2000) is considered for carrying out system studies.
Studies have been carried out considering (i) Angul-Srikakulam-Vemagiri 765kV D/c
line along with “Constraints in 400kV bay extensions at Vemagiri” and (ii) “Wardha -
Maheshwaram 765kV D/c link with anchoring at Nizamabad”. Study results are given
at Exhibit-3(a)-3(c). From the results, it is seen that LTA of 2000 MW cannot be
accommodated with aforesaid system on account of overloading of Vemagiri (AP) –
Vemagiri (PG) 400kV D/c line (about 1150MW under n-1 condition).
Further, it is to mention that following additional inter regional links has been planned
for power transfer from NEW Grid to SR.
1. Strengthening of transmission system beyond Vemagiri
2. Additional inter-Regional AC link for import into Southern Region i.e. Warora –
Warangal and Chilakaluripeta - Hyderabad - Kurnool 765kV link
3. HVDC Bipole link between Western region (Raigarh, Chhattisgarh) and Southern
region (Pugalur, Tamil Nadu)- North Trichur (Kerala).
As per available information, process of SPV transfer for “Strengthening of
transmission system beyond Vemagiri” is in advanced stage under TBCB and
expected to be commissioned earlier than other two schemes. Accordingly, study
has been carried out with ““Strengthening of transmission system beyond Vemagiri”.
Study results for Southern Region are given at Exhibit-4-(a)-(d). It has been
observed that all line loadings are within limits for additional power transfer of 2000
MW from Chhattisgarh to Telangana.
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Same studies have been repeated for Western Region to identify constraints, if any,
within Western Region. Study results for Western Region are enclosed at Exhibit-5-
(a) [Base Case], Exhibit-5-(b) [With Additional 2000MW power transfer from
Chhattisgarh State Generations (incl. Marwa) to SR] and Exhibit-5-(c) [Case 5(b) +
reduction of Chhattisgarh load by 2000MW and reduction in Chhattisgarh IPP
Generation by 2000MW]. As seen from exhibits, no constraints are observed in
Western Region.
Accordingly, LTA for transfer of 2000 MW power from state sector generation in
Chhattisgarh (WR) to Telangana (SR) may be granted with commissioning of
following transmission system :
Angul-Srikakulam-Vemagiri 765kV D/c line along with “Constraints in 400kV bay
extensions at Vemagiri
Wardha - Maheshwaram 765kV D/c link with anchoring at Nizamabad
Strengthening of transmission system beyond Vemagiri
The above system would also be taken up in the LTA/SCM meeting of SR
constituents for finalisation of the transmission system involving strengthening in
southern region.
Members may discuss and decide.
9. Connectivity of National High Power Test Laboratory (NHPTL), Bina (Madhya
Pradesh)
Based on the initiative of Ministry of Power, Govt. of India, National High Power Test
Laboratory Pvt. Ltd. (NHPTL), a Joint Venture Company of NTPC, NHPC,
POWERGRID, DVC and CPRI is establishing a state of the art, international class
online short circuit test facility at Bina power Grid substation in Madhya Pradesh.
This on Line High Power Short Circuit Test Facility is expected to provide a full range
of short circuit testing for the National Power equipment manufacturers, National
Power utilities and International Power equipment manufacturers from SAARC,
ASEAN & Middle East Countries in conformance to Indian and International
Standards.
The NHPTL facility comprises of following test laboratories:
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(a) High Voltage Transformer Testing (HVTR) Lab - For short circuit testing of large
power transformers of 132 kV, 220 kV, 400 kV & 765 kV class
(b) Medium Voltage Transformer Testing (MVTR) Lab - For short circuit testing of
transformer from 11kV to 66 kV Class
(c) High Current low Voltage (HCLV) Lab - testing high current withstand capability of
electrical equipment such as LV Bus Bar, LV Contacts, LV breakers, LV
Disconnectors, LV switchgear, Bushings, CT, up to 400 kArms with 1100 kA peak
(d) High Power Synthetic (HPS) Lab - for short circuit testing of Switchgears (Circuit
Breakers) up to 550 kV, 63 kA for Short-Circuits duties using synthetic methods.
The matter was also discussed in the 30th meeting of Standing Committee on Power
System Planning in WR held on 8th July, 2010. Now, the HVTR and MVTR
laboratories are in advance stages of completion. System Studies are underway by
CPRI to assess the impact of High Voltage Short Circuit testing of transformers
(duration 250ms.) on Indian Grid. Accordingly, NHPTL intends to connect its high
power test lab with Bina Substation of POWERGRID at 400kV and 765kV Voltage
levels. Proposed mode of connection of the lab is as given in the figure below:
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Accordingly, the connectivity is proposed through following arrangement:
1. Bine (PG) – NHPTL (HVTR Lab) Switchyard 765kV S/c line (Quad Bull
conductor) (about 700m.)
2. Bina (PG) – NHPTL (HVTR Lab) Switchyard 400kV S/c line (Quad Bersimis
conductor) (about 600m.)
Three meetings were held on 09.06.15, 27.07.15 and 09.11.15 amongst CEA, CTU,
POSOCO, NHPTL and CPRI to discuss & review system studies being carried out
by CPRI related with connection of NHPTL Lab with Bina Substation of
POWERGRID. As NHPTL is a one of its kind facility in India, draft of the connection
agreement for the test lab is also being finalised by CTU is consultation with NHPTL.
Members may note.
