abt2010.ppt

7/17/2019 ABT2010.ppt

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Welcome to

PRESENTATION ON

AVAILABILITY BASED TARIFF (ABT )

--------anilpatil

2010

7/17/2019 ABT2010.ppt


ABT is

Frequency Based Tariff (Drawals (Vs.)

Frequency)Reactive power based Tariff (Reactive

ower (Vs.) Volta!e)

7/17/2019 ABT2010.ppt


Adverse Grid conditions

Wide frequency uctuations cause seriousdamages at Generation & load ends. Low frequency during peak load hours, with

frequency going down to 48. ! 48." #$. formany hours e%ery day.

#igh frequency during o peak hours, withfrequency going up to "." to "'#$. for manyhours e%ery day.

(apid and wide changes in frequency ! ' #$.change in " to ' minutes, for many hourse%ery day.

)ery frequent grid distur*ances, causingtripping of generating stations, interruptionof supply to large *locks of consumers, anddisintegration of the regional grids.

7/17/2019 ABT2010.ppt


5

PRE-ABT problems in Grid operation

Load

(MW)

Time (hours)

Low frequen!"#$ % #$&5 '

Off-Peak

Peak

'ih frequen!"5*&5 % 5+ '

Rapid hane"

+ ' in 5 % +*minutes,

man! hours eer!da!

+ . /

0requent rid disturbanes"Generator trippins1

suppl! interruptions1rid disinteration

#

Freq.

(Hz)

7/17/2019 ABT2010.ppt


Solutions identified by CTU

T"e #T$ "as stated t"at t"e solution to t"ese problems

lies in%

&a'imiation of !eneration durin! pea load "ours andload curtailment equal to t"e deficit in !eneration

Bacin! down of !eneration to matc" t"e system load

reduction durin! off pea "ours* as per merit order of

!eneration. +,B (+oad - ,eneration balance to be maintained

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#entral Transmission $tility (#T$)s resolution

Bacin! down of !eneration to matc" t"e system load reduction

eepin! t"e merit order of !eneration in view

2a3imisation of eneration

Load urtailment equal to the defiit in eneration&

Off-Peak

Peak

Load

(MW)

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Availability Based Tariff – 6 Yrs Succesfully completed!!!…

/uly012 to /uly013 4even 5ears is si!nificant for WRconstituents for successful implementation of 6BT

For t"e first time in 7ndia* in t"e "istory of power sector

Western Region "uly#$$#

%ort&ern Region 'ec#$$#

Sout&ern Region – "an#$$(

)astern Region Apr#$$(

%ort&)astern Region %ov#$$(

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Inter-State vailability Based

Tariff…..?

7t is an effective commercial mec"anism

envisa!ed to enforce ,rid Discipline undert"e basic framewor of 7ndian 8lectricity

,rid #ode (78,#)

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Applicability

6BT is applicable to To t"e !enerators supplyin! ener!y to more t"an

one constituent(i.e.) #entral !eneratin! stations.

To all t"e constituents w"o draw power fromcentral !rid.

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Present tariffs and billing procedures

9T#% Two part tariff:)Fi'ed cost 2) Variable cost

;t"ers% sin!le part tariff.

Billin!% ooled cost is bein! applied for t"eener!y drawn from central !rid irrespective of

t"e entitlements on mont"ly basis<.

9o penalty for over or under drawals<T"ere are subsequent c"an!es wit" one or more constituents

"avin! no entitlement from a !enerator

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Why ABT?

7ndiscipline by !enerator by !eneratin! more

durin! "i!" frequency and less durin! low

frequency t"an sc"eduled !eneration.

7ndiscipline by constituents by drawin! moredurin! low frequency and less durin! "i!"

frequency t"an t"e sc"eduled drawal.

Bot" are in=urious to t"e !rid.>ence #T$ "as proposed 6BT

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Concept of availability based tariff

#apacity allocations from !eneratin! station to

eac" constituent will be owned by t"at

constituent.

#onstituent "as to pay full fi'ed c"ar!es for t"e

allocated power.

#onstituent can trade t"e capacity allocated.

#onstituent can sc"edule t"e ener!y from eac"

!enerator as per requirement and &erit ;rder

and can save cost of power purc"ase.

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Concept of availability based tari ,enerator%

#8R# will fi' tar!et availability at w"ic" fi'ed

c"ar!es can be recovered in full.

,enerates as per t"e requirement of

constituents sub=ect to tec"nical limitations.

,ets incentive for better performance.

Receives variable c"ar!e as per sc"eduled!eneration.

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Components of Proposed ABT

* +apacity c&arges based on declared availability

)ac& generating station &as its capacity c&arge,

#* )nergy c&arges for t&e energy sc&eduled

-ariable +ost

)ac& generating station &as its variable c&arge,,

(* .nsc&eduled /nterc&ange 0./* c&arge 12,#$3$,($ 45

in7ed to fre8uency at 3$,($ 45 $ p9uat 12,#$ 45, $:(3 p9u

0T&is tariff is common to all generators as ;ell asconstituents*

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6vailability Based Tariff 6vailability Based Tariff (6BT) consists of ? parts.

:. #apacity #"ar!e for sent out 6vailability.

2. 8ner!y #"ar!e for sc"eduled !eneration @ drawl.

?. $nsc"eduled interc"an!e ($7)

T"e variation of sc"eduled !eneration (4,) to actual

!eneration (6,)A 4, 6,.

T"e variation of sc"eduled drawl(4D) to actual Drawl(6D) A 4D 6D.

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Receipts by t&e <enerator

6.#apacity #"ar!e based on declared !enerationavailability.

B. 8ner!y c"ar!es for t"e ener!y sc"eduled by R+D# .

#. $7 c"ar!es (at low frequency operation)%

7f $7 is positive !enerator will receive. 6, C 4,

7f $7 is ne!ative !enerator will pay. 6, 4,

(T"is will be wored out for eac" time bloc)Receipts A 6EB#Eincentive..

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Payment by the beneficiaries

6. #apacity c"ar!e in proportion to t"e s"ares of t"e

declared availability.

B. 8ner!y c"ar!e for t"e ener!y sc"eduled by t"e

constituent.

#. $7 c"ar!es (Durin! low frequency operation)%

7f $7 is ne!ative beneficiary will receive. 6D 4D

7f $7 is positive beneficiary will pay. 6D C 4D

(T"is will be wored out for eac" time bloc ) paymentsA6EB#E proportionate incentive.

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Unscheduled Interchange (UI of !o"er

A generator generates more than the

schedule, thereby increasing the frequency.

A generator generates less than the

schedule, thereby decreasing thefrequency.

A beneciary overdraws power, thereby

decreasing the frequency. A beneciary underdraws power, thereby

increasing the frequency..

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+apacity +&arge and /ncentive 4tation 6nnual #apacity #"ar!e 7ncentive

6vailability

Formula for calculation +F < of 7ncentive

9T# 10G1H 6F# ' 6vailability (H)

G1H

6boveIIH

J1H of t"e fi'ed cost @Kw"applicable at G1Havailability limited to 2:.Jpaise @ KW>r.

6bove31H

J1H of t"e above

9+# 10I2H 6F# ' 6vailability (H)

I2H

6boveI2H

J1H of t"e fi'ed costapplicable at I2Havailability limited to 2:.Jpaise @ KW>r.

7/17/2019 ABT2010.ppt


./ Rate

1

:L1

2G1

L21

JM1

L G . J

L 3

L 3 . J

J 1

J 1 . J

=re8uency 045,*

.

/ R a t e

0 > a i s e

9 . n i t *

UI ate

!" aise #

Unit$

./ Tariff in "uly #$$#

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+&anging ./ Rates

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#8R# Re!ulation 21:1

effect from ?.J.21:1 ;b=ective

T"e ob=ective of t"ese re!ulations is to maintain

!rid discipline as envisa!ed under t"e

,rid #ode t"rou!" t"e commercial mec"anism

of $nsc"eduled 7nterc"an!e #"ar!es by

controllin! t"e users of t"e !rid in sc"edulin!*

dispatc" and drawl of electricity.

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4#;8

T"ese re!ulations s"all be applicable to -

(i) t"e !eneratin! stations and t"e beneficiaries*and

(ii) sellers and buyers involved in t"e

transaction facilitated t"rou!" open access or

medium term access or lon!0term access ininter04tate transmission of electricity.

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$nsc"eduled 7nterc"an!e ($7) #"ar!es%

7n terms of clause (:) of Re!ulation J* t"e c"ar!es for$nsc"eduled

7nterc"an!es for all t"e time0blocs payable for over0

drawal by t"e buyer or t"e beneficiary and under0

in=ection by t"e !eneratin! station or t"e seller

and receivable for under0drawal by t"e buyer or t"e

beneficiary and over in=ection by t"e !eneratin! station

or t"e seller s"all be wored out on t"e avera!e

frequency of t"e time0bloc at t"e rates

(8ac" 1.12 > step is equivalent to :J.J paise@W" in

t"e J1.20L3.I > frequency ran!e and

LI.1 aise@W" in t"e L3.I0L3.J1 > frequency ran!e).

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(a) T&e +&arge for .nsc&eduled /nterc&ange s&all be 5ero at grid

fre8uency of 3$,# 45 and above,

0b* T&e +&arge for .nsc&eduled /nterc&ange corresponding to grid

fre8uency interval of ?belo; 3$,$# 45 and not belo; 3$,$ 45@ s&all

be based on t&e median value of t&e average energy c&arge of

coal9lignite based generating stations for t&e si mont&s period of

August #$$2 to "anuary #$$ and suitably adusted up;ard to

decide on t&e ./ price vector

0c* T&e ./ >rice -ector s&all accordinglyC be in steps for a fre8uency

interval of $,$# 45 bet;een 3$,#$ 45 to 3$,$ 45,

0d* T&e +&arge for .nsc&eduled /nterc&ange in grid fre8uency interval

of ?belo; 12,:$ 45 and not belo; 12,6D 45@ s&all be suc& t&at it

provides sufficient incentive to t&e generating station based on coal

including imported coal to support t&e grid after meeting fied and

energy c&arge,

Eet&odology Ff ./ determination

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0e* T&e ./ >rice -ector s&all accordingly be in steps for a fre8uency

interval of $,$# 45 bet;een 3$,$ 45 to 12,:$ 45,

0f* T&e +&arge for .nsc&eduled /nterc&ange at grid fre8uency belo;

12,3 45 s&all be based on t&e &ig&est of t&e average energy c&arges

of generating stations for t&e si mont&s period of August #$$2 to"anuary #$$ and suitably adusted up;ard to decide on t&e ./

price vector

0g* T&e ./ >rice -ector s&all be in steps for a fre8uency interval of

$,$# 45 bet;een 12,:$ 45 to 12,3$ 45 corresponding to t&e +&argefor .nsc&eduled /nterc&ange in grid fre8uency interval of ?belo;

12,:$ 45 and not belo; 12,6D 45@ and +&arge for .nsc&eduled

/nterc&ange in grid fre8uency interval of belo; 12,3$ 45

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G:, imits on ./ volume and

conse8uences of crossing t&e

limits (:) T"e over0drawal of electricity by any

beneficiary or a buyer durin! a time bloc

s"all not e'ceed :2H of its sc"eduleddrawal

or :J1 &W* w"ic"ever is lower* w"en

frequency is below L3.I >

and ?H on a daily a!!re!ate basis for allt"e time blocs w"en t"e frequency is

below L3.I >

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Gimits on ./ volume and

conse8uences of crossing t&e

limits0#* T&e underinection of electricity by a generating station or a

seller during a timebloc7 s&all not eceed #H of t&e sc&eduled

inection of suc& generating station or seller ;&en fre8uency is

belo; 12,: 45 and (H on daily aggregate basis for all t&e time

bloc7s ;&en t&e fre8uency is belo; 12,: 45

0(* /n addition to .nsc&eduled /nterc&ange +&arges corresponding

to fre8uency of 12,3 45 as stipulated under Regulation 3 oft&ese regulationsC Additional .nsc&eduled /nterc&ange +&arges&all be applicable for overdra;al or underinection of

electricity for eac& time bloc7 ;&en grid fre8uency is belo; 12,345 at t&e rates specified in t&e sc&edule A

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(?a) T"e additional $nsc"eduled 7nterc"an!e c"ar!e forover0drawals

and under0in=ection of electricity for eac" time bloc w"en!rid

frequency is below L3.J > s"all be as specified by t"e

#ommission as a percenta!e of t"e c"ar!es for t"e$nsc"eduled

7nterc"an!e in !rid frequency Nbelow L3.J >O wit" due

consideration to t"e be"avior of t"e buyer andbeneficiaries and

sellers and t"e !eneratin! stations towards !riddiscipline.

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(?b) T"e additional $nsc"eduled 7nterc"an!e c"ar!e forunderin=ection

of electricity durin! t"e time0bloc w"en !rid frequency

is below L3.J >* by t"e !eneratin! stations usin! coal orli!nite

or !as supplied under 6dministered rice &ec"anism(6&) as

t"e fuel s"all be as specified by t"e #ommission as apercenta!e

of t"e #ap Rate* wit" due consideration to t"e be"aviorof t"e

!eneratin! stations towards !rid discipline.

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(L) ayment of $nsc"eduled 7nterc"an!e

#"ar!es under Re!ulation J and t"e 6dditional

$nsc"eduled 7nterc"an!e #"ar!e under

Re!ulation I(?) above* s"all be levied wit"out

pre=udice to any action t"at may be considered

appropriate under 4ection :L2 of t"e 6ct for

contravention of t"e limits of over0drawal or

under !eneration as specified in t"ese re!ulations* for eac" time

bloc w"en frequency is below L3.I >.

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T"e c"ar!es for over0drawal @ under0

in=ection and underdrawal@ over0in=ection

of electricity s"all be computed by t"e secretariat of t"e respective Re!ional

ower #ommittee in accordance wit" t"e

met"odolo!y used for preparation of

NRe!ional 8ner!y 6ccountsO.

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T"e Re!ional +oad Despatc" #entre s"all prepare andpublis" on

its website t"e records* on mont"ly basis* of t"e $7 6ccounts*

specifyin! t"e quantum of over0drawal@under0!enerationand

correspondin! amount of $7 c"ar!es paid for eac"beneficiary or

buyer and received for eac" !eneratin! station or seller

for t"e time0blocs w"en !rid frequency was below L3.J > and

between L3.I0L3.J > separately.P

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G2, .nsc&eduled /nterc&ange

+&arges Accounting

(:) 6 statement of $nsc"eduled 7nterc"an!e c"ar!es includin! 6dditional $nsc"eduled 7nterc"an!e c"ar!es levied under t"esere!ulations s"all be prepared by t"e 4ecretariate of t"e respectiveRe!ional ower #ommittee on weely basis based on t"e data

provided by t"e concerned R+D# and s"all be issued to all constituents

by Tuesday* for seven day period endin! on t"e penultimate 4undaymid0ni!"t. (2) 6ll payments on account of $nsc"eduled 7nterc"an!e c"ar!es includin! 6dditional $nsc"eduled 7nterc"an!e c"ar!es levied under t"ese re!ulations and interest* if any* received for late payment s"all be credited to t"e funds called t"e QRe!ional $nsc"eduled 7nterc"an!e ool 6ccount FundP* w"ic" s"all be maintained and

operated by t"e concerned Re!ional +oad Despatc" #entres in eac" re!ion in accordance wit" provisions of t"ese re!ulations

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6ny additional $7 c"ar!e collected from

a re!ional

entity s"all be retained in t"e QRe!ional$nsc"eduled

7nterc"an!e ool 6ccount FundP of t"e

concerned re!ion w"ere

t"e re!ional entity is located.P

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Sc&edule of >ayment of .nsc&eduled /nterc&ange +&arges

and >ayment Security

(:) T"e payment of $7 c"ar!es s"all "ave a

"i!" priority and t"e concerned constituent s"all

pay t"e indicated amounts wit"in :1 (ten) days

of t"e issue of statement of $nsc"eduled7nterc"an!e c"ar!es includin! 6dditional

$nsc"eduled 7nterc"an!e c"ar!es by

t"e 4ecretariate of t"e respective Re!ional

ower #ommittee into t"e QRe!ional$nsc"eduled 7nterc"an!e ool 6ccount FundP

of t"e concerned re!ion.

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(2) 7f payments a!ainst t"e $nsc"eduled

7nterc"an!e c"ar!es

includin! 6dditional $nsc"eduled 7nterc"an!e

c"ar!es are delayed by more t"an two days*

i.e.* beyond twelve (:2) days from t"e date of

issue of t"e statement by t"e 4ecratriate of t"e

respective Re!ional ower #ommittee* t"e

defaultin! constituent s"all "ave to pay simpleinterest < 1.1LH for eac" day of delay

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6ll re!ional entities w"ic" "ad at any time durin! t"e previous financial year failed to mae payment of $nsc"eduled

7nterc"an!e c"ar!es includin! 6dditional $nsc"eduled7nterc"an!e c"ar!es wit"in t"e time specified in t"esere!ulations s"all be required to open a +etter of #redit (+#)equal to ::1H of its avera!e payable weely $7 liability in t"eprevious financial year* in favour of t"e concerned R+D# wit"ina fortni!"t from t"e date t"ese Re!ulations come into force.

rovided t"at if any re!ional entity fails to mae payment of$nsc"eduled 7nterc"an!e #"ar!es includin! 6dditional

$nsc"eduled 7nterc"an!e #"ar!es by t"e time specified int"ese re!ulations durin! t"e current financial year* it s"all berequired

to open a +etter of #redit equal to ::1H of weely outstandin!

liability in favour of respective Re!ional +oad Despatc" #entre wit"in a fortni!"t from t"e due date of payment.

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/llustration% 7f t"e avera!e payable weely $7 liability of a re!ional entity durin! 21130:1 is Rs. 21 crore* t"e re!ionalentity

s"all open +# for 22 crore in 21:10::. 7f t"e weely

payable liability durin! any wee in 21:10:: is Rs. ?J crore w"ic" is more t"an J1H of t"e previous financial yearOs avera!e payable weely liability* t"e concerned re!ional entity s"all increase t"e +# amount to Rs. ?J #rore by addin! Rs. :?

#rore. (J) 7n case of failure to pay into t"e Q$7 ool 6ccount FundP

wit"in t"e specified time of :2 days from t"e date of issue of statement of $7 c"ar!es* t"e R+D# s"all be entitled to encas" t"e +# of

t"e concerned constituent to t"e e'tent of t"e default and t"e concerned constituent s"all recoup t"e +# amount wit"in ? days

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$7

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S+4)'.) GAI .nsc&eduled /nterc&ange 0./* +&arges

Avg Freq of time block (HZ) U I Rate

Below Not below (paise/kw

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#$%erience "ith Unscheduled Interchanges

+ase/ FW =R)J.)%+Y F-)R 'RAW

T&is is serious situation as .,/, Rates are very &ig&C andconstituent is at default,

Action re8uired,

/ncrease o;n generation to ma, possible etent

+arry out oad S&edding

/ncrease +S sc&edule to full entitlement

Try support from anot&er system 0purc&ase*

+ase// 4/<4 =R)J.)%+Y .%')R 'RAW

.,/, Rates are lo; and constituent is loosing

Action re8uired,

Wit&dra; oad S&edding if any

Reduce o;n generation to possible etent

Try for bilateral sale of po;er

Reduce +S sc&edule to 7eep ./ minimum

T

&

'

U

I

S

(

#

)

*

I

'

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Changes in Tariff to incentivise Generating Stations

+re - /ystem - /ystem

'0he nnual 12ed 3i2ed charges

charges 350 include 6nterest on loan 7epreciation &9 e2penses :o 5hange

(eturn on equity 6ncome ta2 6nterest on working 5apital;0 35 at '0 a*o%e to ;0 35 including (<*e reco%ered at =8.4>? +L3 reco%ered in full at

8? a%aila*ility. t

lower a%aila*ility+ro@rata nnual

12ed charges.

(#ontdS)

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a

a

R)S.TS /% W)ST)R% R)</F%

a

What we achie%ed through -

Fperational 'iscipline

5ear Ha!e time forfrequency inL30J1.J> band

FV7

211:012 M:H ::.3:

211201? ML.MH ::.3?

211?01L 3L.3H :.GM

211L01J 3G.1H :.?G

M:H ML.M1H

3L.31H 3G.11H

::.3: ::.3?

:.?G:.GM

1H

:1H

21H

?1H

L1H

J1H

M1H

I1H

G1H

31H

:11H

2001-02 2002-03 2003-04 2004-05 Year

H a g e T i m e

1

2

L

M

G

:1

:2

:L

= - /

FV7

Ha!e Time 9ormal

Freq.

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Scheduling 4c"edulin! starts one day in advance.

8ac" day will be divided into 3M time blocs of :J minutes

eac" and sc"edule will be for eac" time bloc..

,enerator will declare t"e availability of !eneration to

R+D# (sent out capability (4;#) ).

Based on availability* R+D# communicates t"e

entitlements to beneficiaries.

Wit"in t"e entitlements indicated by R+D# beneficiarieswill !ive t"eir requisition to R+D#.

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Sc&edule R'+ ;ill intimate unsc&eduled capacity if any to t&e

constituents, +onstituents can trade bilaterally and intimate to R'+,

+onsolidating t&e re8uisitions of t&e beneficiaries R'+

;ill prepare ebus Sc&eduled <eneration 0S< *to t&e

<enerator and Sc&eduled 'ra;ls 0S'* at t&e point of

delivery of t&e constituents and communicate,

Actual generation 0A<*C Actual 'ra;ls 0A'* by t&e

beneficiaries and average fre8uency for eac& time bloc7

;ill be measured for all t&e time bloc7s,

S<C A<C S' and A' in EW4 at ebus from t&e generating

stations and at point of delivery of constituents,

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=eatures of t&e Special )nergy Eeters 0S)E*

48& can record :J minutes avera!e frequency in between L3.11 to J:.11>

:J minutes avera!e net ener!y transmitted.

#umulative net ener!y transmitted.

9et Rva" transmitted below 3IH rated volta!e. 9et Rva" transmitted above :1?H rated volta!e.

&eter "as a non0 volatile memory and can automaticallystore avera!e frequency* net ener!y transmitted in :J

minutes time bloc cumulative ener!y and cumulativeRva" at eac" midni!"t.

T"e above data can be stored only for :1 days.

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>rocedure for collecting t&e data

from S)E.Data can be collected wit" t"e "elp of

ortable@"and0"eld data collection devices

(D#D).

Data "as to be collected once in a wee as itis capable of storin! t"e data only for :1 days.

T"e data so collected is downloaded into

computers and final $7 is be calculated.

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Billing and Payment of U

$7 c"ar!es in"erent part of Tariff - not a penalty.

$7 c"ar!e is proposed to be settled t"rou!" re!ularad=ustments on weely basis from #ontrol roomreadin!s.

6t t"e end of t"e wee* balance position of $7distribution to be finalised by R8B.

T"e net $7 c"ar!es after t"e re!ular ad=ustmentss"ould be distributed* billed and paid at t"e end ofeac" wee

#T$ will wor out t"e accountin! system inconsultation wit" all beneficiaries and becomeoperational in ne't ? mont"s.

7/17/2019 ABT2010.ppt


C!"C #pines

$7 c"ar!e is not in t"e nature of penaltybut is a part of tariff

To lin up overdrawals and under

drawals on a re!ular basis#omposite sc"eme to be evolved to fi'

up balance part and distribute $7

9et $7 c"ar!es to be billed weely after

ad=ustments

ros #ons of 6BT

7/17/2019 ABT2010.ppt


0+ontd,,*

%&outhern egion is

included as the rst to

implement A'(. )ow

decided to be from *+*+

--

% (here is dearth of

/en.capacity forfrequency correction in

&..

% (he system is operating

at 01.0 23 for 4-5 of the

time where as at 04.-23 and below 0*0 to 0-

ps per unit is to be paid

%6ariable costs paid inrelation to 7nergy drawn

can be traded%7very &tate is free todispose o the whole orpart of allocated share toothers

%Allocation are based onavailability

% (here is a mechanismfor incentives anddisincentives

%8ith e9pansions oftransmission networ:sopportunities for tradingincrease

ImpactsPt!ntial B!n!"ts

ros #ons of 6BT 0+ontd…*

7/17/2019 ABT2010.ppt


Impacts"otential 'enets

ossibilities of abeneficiary by

manipulation of

,eneration and drawals

to !et ma'imum benefit

in terms of $7

States can operate t&eir<en,Stns, on commercial lines

by buying or bac7ing do;n as

per merit order dispatc&

=acilitates

grid discipline

trading in capacity and

generation

merit order dispatc&

At present applicable to%T>+ K %+ in future />>s

and Atomic stations may also

be included

7/17/2019 ABT2010.ppt


Pricing for Reactive Power

CTU Proposals

7/17/2019 ABT2010.ppt


CTU Proposals

All reactive po;er ec&anges to be compensated to avoid /STS

lines carrying reactive po;er,

!very Beneficiary

>ays for -AR dra;al ;&en voltage at t&e metering point is belo;

2:H,<ets paid for -AR return ;&en voltage is belo; 2:H,

<ets paid for -AR dra;al ;&en voltage is above $(H,

>ays for -AR return ;&en voltage is above $(H,

%eed not pay for dra;al of reactive po;er at t&e <enerating

Station

+&arge of 1 paise per L-AR& ;as proposed

<enerator ;ill not be compensated for reactive po;er generated,

7/17/2019 ABT2010.ppt


!GC StipulatesRate of L paise per KV6R" is included in

78,#.

4ubsequently it is mentioned t"at a nominal

rate to be reviewed from time to time will be

notified by #8R#.

9o compensation for reactive power drawal at

,eneratin! 4tations.

7/17/2019 ABT2010.ppt


What is done $ith the amounts

collected ? 6mounts collected are proposed to be

utilised for furt"er system

improvement.

4uc" investments on improvementsare to be approved by 4R8B

ndications

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ndications

+T. &as indicated t&at t&is sc&eme ;ill come into

force along ;it& ABT,

7/17/2019 ABT2010.ppt


Conclusionsower system operation "as assumed

commercial si!nificance

Tec"nical considerations lie availability*

demand* Transmission constraints* also to be

wei!"ed a!ainst economic bac!round.

#ontinuous monitorin! and decision main! at

"i!"est level imperative.>i!"er de!ree of concentration on ,R7D

;8R6T7;9.

=F.R S+)%AR/FS

7/17/2019 ABT2010.ppt


=F.R S+)%AR/FS

6. FR8U$89#5 74 ,;;D ;R >7,>* 69D T>8 4T6T8 74;V8RDR6W79,

0 9o problem* and no action required

For en"anced optimisation* "owever to t"e e'tent possible

i. Reduce own !eneration to t"e e'tent possible andincrease overdrawal so lon! as frequency is above

about L3.G >.ii. Restore consumer load t"at "ad been s"ed* provided

tariff @ realisation rate is "i!"er t"an current $7 Rate(T"is also increases overdrawal)

iii.

7ncrease #,4 requisition* if some part of t"eentitlements "ad not been requisitioned earlier*provided t"e frequency is (and is liely to remain)below about J1.2 >. (T"is would increase t"e drawalsc"edule and t"ereby reduce overdrawal)

(#ontdS.)

7/17/2019 ABT2010.ppt


=F.R S+)%AR/FS (Contd….)

B. FR8U$89#5 74 ,;;D ;R >7,>* 69D T>8 4T6T8 74$9D8R0DR6W79, % 6ction required

i. Reduce own !eneration to t"e e'tent possible* if

t"e frequency is above about L3.G >. (T"is would

reduce under0drawal)ii. Restore consumer load t"at "ad been s"ed* and

reduce under0drawal

iii. Reduce #,4 requisition* provided t"e previous two

actions "ave been taen and t"e frequencycontinues to be above J1.2 - J1.? >. 7f frequency

is liely to remain above J1.2 >.* bilateral sale to a

needy nei!"bour can be tried

(#ontdS.)

=F.R S+)%AR/FS 0+ td *

7/17/2019 ABT2010.ppt


=F.R S+)%AR/FS 0+ontd…,*

#. FR8U$89#5 74 +;W* 69D T>8 4T6T8 74

;V8RDR6W79, % 6#T7;9 R8U$7R8D

i. 7ncrease own !eneration to t"e ma'imum possible

e'tent

ii. #urtail consumer load* load s"eddin! to be !radedbalancin! between $7 price and consumer cate!ory

iii. 7ncrease #,4 requisition to full entitlement (if not

requisitioned fully earlier)* and arran!e for bilateral

purc"ase from anot"er 48B @ #,4 (#ontdS.)

=F.R S+)%AR/FS 0+ontd *

7/17/2019 ABT2010.ppt


=F.R S+)%AR/FS 0+ontd…,*

D. FR8U$89#5 74 +;W* 69D T>8 4T6T8 74 $9D8R0DR6W79, % 9; 6#T7;9 R8U$7R8D F;++;W79, #69

B8 D;98 F;R 89>69#8D ;T7&746T7;9.i. 7ncrease own !eneration to t"e e'tent possible*

provided t"e frequency is below about L3.J >.(comparin! variable cost wit" current $7 price)

ii. #urtail consumer load* by s"eddin! low priority load(provided $7 earnin! for t"e 48B =ustifies suc" loads"eddin!). T"is is totally optional* and "elps t"e !rid.

iii. 7ncrease #,4 requisition to full entitlement (if notrequisitioned fully earlier)* and earn $7 or sell t"esurplus t"rou!" a bilateral a!reement

6#T7;9 D889D4 ;9 R8V67+79, FR8U$89#5* 69D 7479D889D89T ;F W>8T>8R ;V8R0DR6W79, ;R $9D8R0DR6W79,. 7T F;++;W4 T>6T ;9+798 &864$R8&89T 69DD74+65 ;F #;RR8#T 98T DR6W6+ 74 9;T 6++ T>6T #R7T7#6+.

7/17/2019 ABT2010.ppt


%A&AG!%!&T #' ("AWA)S

+.RTA/E)%T F= 'RAWA BY S)B

a) 7f $7 rate is "i!"er t"an t"e "i!"est ener!y rate

of t"e stations sc"eduled* t"en curtail drawal byma'imisin! c"eaper !eneration

b) 7f $7 rate is "i!"er t"an consumer load net

recovery rate t"en curtail drawal by loads"eddin!

7/17/2019 ABT2010.ppt


6BT &ec"anism

6vailability Based Tariff (6BT) mec"anism

concerns itself wit" t"e tariff structure for bul

power

7t is aimed at brin!in! about more responsibility

and accountability in power !eneration and

consumption t"rou!" a sc"eme of incentives

and disincentives T"e frequency lined pricin! mec"anism act as

t"e real time balancin! maret

7/17/2019 ABT2010.ppt


6BT &ec"anism

T"e 6BT mec"anism was applicable to 4tate utilities

74,4 T"e mec"anism was desi!ned

essentially for balancin! 7nter04tate

transactions

7/17/2019 ABT2010.ppt


Balancin! &ec"anism

T"e nature of electricity would mae t"e

demand and supply to matc" second to

second

T"is requires t"e utilities to matc" t"eir

sc"edule wit" t"eir actual drawal

T"e deviations are to be purc"ased@sold

in t"e real time maret at t"e prevailin!price

7/17/2019 ABT2010.ppt


Requirement

T"e main requirement for efficiency

operation of 7ntra 4tate 6BT

+oad Forecastin! for eac" bloc period #reation of &W sc"edule

Real time monitorin! mec"anism for

drawal by t"e sc"edulers

roper pricin! sc"eme for incentive@disincentive for t"e !enerators and t"e

consumers (Disco or ;6 customer)

7/17/2019 ABT2010.ppt


+oad Forecastin!

8ac" discomOs must forecast t"eir demand forevery bloc period in order to sc"edule t"e!eneration

7n t"e absence of reliable load forecastin!* t"ediscom may "ave to pay penalty for over@underdrawin!

T"is is a critical factor for intra0state 6BT unliet"e inter0state 6BT w"erein t"e 4tate would

"ave to sc"edule around ?1H to L1H of t"eirrequirement from 74,4

7/17/2019 ABT2010.ppt


4c"edules

Based on t"e load forecast* t"e discommust prepare t"e merit order sc"eduleand submit t"eir requirement to t"e 4+D#

for day a"ead T"e 4+D# to formulate t"e sc"edule into

4tate wide sc"edule includin! t"erequirement of 74,4

T"e 4+D# must also factor t"etransmission losses w"en creatin! t"e4tate wide sc"edule

7/17/2019 ABT2010.ppt


&onitorin!

T"e discom must monitor t"eir drawal

a!ainst sc"edule in t"e real time in order

ma'imie t"eir earnin!

;nly available option for t"e discom is to

reduce t"eir demand by load s"eddin!

as no !eneration is available wit" t"em

to vary to matc" t"eir drawal wit" t"esc"edule

7/17/2019 ABT2010.ppt


ricin! &ec"anism

T"e $7 must be c"ar!ed appropriately

7t is ideal to follow t"e same $7

mec"anism as available in inter0statetransaction

6ny variation wit" t"e inter0state

mec"anism would result in over@under

payment by t"e players

7/17/2019 ABT2010.ppt


6pplicability of 7ntra04tate 6BT

4tate owned @4tate !eneratin! companystations of above :1&W

6ll 7s@any ot"er !eneratin! stations

above :1&W w"ic" are contracted tosupply power to 48B@4T$@4tate,ovt.@Discoms

6ll Discoms and ot"er entities

Distribution licensees w"o are suppliedpower from identified !eneratin! stationsas per allocation

7/17/2019 ABT2010.ppt


./ 0%ot full ABT*

6ll entities availin! Q;pen 6ccessP

8ntities availin! w"eelin! of captive !eneration

6ll !eneratin! stations below :1&W w"ic" are

connected to 4tate@Discom !rid includin! non0conventional

&erc"ant power plants* pumped stora!e plants 6ll entities@consumers wit" captive@co0

!eneration wit" a possibility of feedin! powerbac to t"e !rid +icensees wit" own !eneration0B484* 68#*

#84#..

7/17/2019 ABT2010.ppt


6BT 9ot applicable

6BT is not applicable to >ydro units T"e variable c"ar!e of >ydro units is muc"

less t"an t"e minimum $7 price w"ic"

entitles t"e "ydro to !enerate even w"en

t"e frequency is "i!"

T"e >ydro is sc"eduled based on t"e

water availability over a period of

time(water year) w"ic" is a critical factor

for stora!e based !enerations

7/17/2019 ABT2010.ppt


Discussion

7/17/2019 ABT2010.ppt


Thank

You…

abt2010.ppt

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