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IMPACT OF UNSCHEDULED INTERCHANGE CHARGES AND RELATED MATTERS (AMENDMENT) REGULATIONS, ISSUED BY CERC ON 28.04.2010 APPLICABLE FROM 03.05.2010 IN THE INTRASTATE ABT OPERATION IN DELHI. Significant Definitions .

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slide1
IMPACT OF UNSCHEDULED INTERCHANGE CHARGES AND RELATED MATTERS (AMENDMENT) REGULATIONS, ISSUED BY CERC ON 28.04.2010 APPLICABLE FROM 03.05.2010 IN THE INTRASTATE ABT OPERATION IN DELHI.
significant definitions
Significant Definitions
  • actual injection in a time-block means electricity generated or supplied by the generating station or seller, as the case may be, measured by the interface meters
  • scheduled generation at any time or for any period or time block means schedule of generation in MW or MWh ex-bus given by the concerned Load Despatch Centre
slide3
time-block means block of 15 minutes, for which specified electrical parameters and quantities are recorded by special energy meter, with first time block starting at 00.00 Hrs
  • Unscheduled Interchange in a time-block for a generating station or a seller means its total actual generation minus its total scheduled generation and for a beneficiary or buyer means its total actual drawal minus its total scheduled drawal
slide4
Gaming mean intentional mis-declaration of DC in order to make an undue commercial gain thru UI charges
  • Narrowed down operational frequency range for improving the quality of power
slide5
Buyer: Means a person, other than the beneficiary, buying electricity, through a transaction scheduled in accordance with the regulations applicable for short term open access, medium term open access and long term access.

Seller: Means a person, other than a generating station, supplying electricity, through a transaction scheduled in accordance with the regulations applicable for short term open access, medium term open access and long term access.

Beneficiary : Means the person purchasing electricity generated from the generating station.

slide6
Permissible frequency band operation and Commercial impact for the violations
  • Permissible operating range has been narrowed down by 0.38 Hz i.e. 49.5 Hz to 50.2 Hz against the previous operating range of 49.22 Hz to 50.3 Hz
  • Entities over drawing from the grid below the permissible freq. of 49.5 Hz, to pay an additional UI charge
  • Entities under injecting into the grid below the permissible freq. of 49.5 Hz, to pay an additional UI charge
slide7
UI rates for coal or lignite or APM fuel generators are symmetrical for over generation and under generation
  • Injection by generating station other than hydro in excess of 105% of DC in a time block or in excess of 101% of DC not to be construed as gaming
  • UI charges and additional UI surcharge rate to be re-notified every six months
  • Any surplus amount left in UI pool to be utilized for supporting transmission schemes
slide8
Charges for UI for all the time blocks when grid frequency is between 50.2 Hz and 49.5 Hz

-payable for over- drawl by beneficiary or buyer and under injection by generating station or seller

- receivable for under-drawl by the beneficiary or buyer and over-injection by generating station or seller

slide12
when freq. is below 49.7 Hz
  • Over-drawl of electricity from schedule by any beneficiary during a time block shall not exceed 12% of its scheduled drawl or 150MW(which ever is lower), and 3% on a daily aggregate basis
  • Under- injection of electricity from schedule by a generating station during a time block shall not exceed 12% of its scheduled injection and 3% on a daily aggregate basis
od ud limits for discom with in delhi
OD /UD LIMITS FOR DISCOM WITH IN DELHI

To drive the UD limit for Discom in term of MW compare to Delhi as a whole under drawing 250 MW ,the same methodology is apply (i.e. in the OD proportion) as adopted by DERC for OD limits of Discom

slide16
In consonance with the UI Regulations at Regional level, the Intrastate UI Accounts preparation as under :
  • A) Draw out UI accounts at intrastate level by applying inter state UI regulations in TOTO effective from 03.5.10.
  • B) Separate out additional UI amounts for overdrawal and under generation.
  • C) Separate out differential cap amount for underdrawing discoms / over injection of generators.
  • D) Draw out the weekly statement of Inter sate UI account issued by NRPC for the same week for to make Intra State UI account to match with the interstate UI amount.
  • E) Settle the Unadjusted Additional UI of Delhi utilities with Additional UI of Delhi as a whole as per NRPC account on daily basis in proportion to additional amount to be paid by the utilities & restrict the additional UI amount of Utilities upto the amount of additional UI charges to be paid by Delhi as a whole as per NRPC account. Since the additional amount to be paid by the intra state utilities would be more than the additional amount to be paid by Delhi, It reduces the accumulation of extra Additional UI amount in the pool account being operated by SLDC.
slide17
F) Settle the unadjusted Differential UI _cap Amount (difference of amount calculated on normal UI rate and caped UI rates) of Delhi utilities as per intrastate UI accounts with the Differential UI_cap amount of Delhi as a whole as per NRPC accounts on daily basis. The adjustment of difference of the two (interstate differential amount and intrastate differential amount) is done in 50:50 basis in proportion between paying & receiving utility on pro rata basis.

It reduces the accumulation of extra differential UI cap amount in the pool account and capping is applied only the same is applied to Delhi

G) Settle the unadjusted capped UI Amount of Delhi utilities as per intrastate UI accounts with UI_cap amount of Delhi as a whole as per NRPC accounts on daily basis by adjusting the Difference of two (interstate UI amount and intrastate UI amount) is done in 50:50 basis in proportion between paying & receiving utility on pro rata basis.

H) Make the final statement of Net UI amount of paying/receiving utilities on the daily basis as under:

Net UI payable/receivable by Utilities at intrastate level

= Additional UI amount (with reference to interstate (para ‘E’) +/- Differential cap Amount (with reference to interstate (para ‘F’) +/- Capped UI amount (with reference to interstate UI account (para ‘G’)

intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks20
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks21
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks22
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks23
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks24
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks25
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks26
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks27
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
intra state ui a c for delhi utilities as per new regulation all figures are in rs lacks28
Intra State UI A/C for Delhi Utilities as per new Regulationall figures are in Rs lacks
methodology for settlement of intra state ui a c for delhi utilities inter state ui account
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

1. Additional UI amount

a) As per UI Regulations

all figures are in Rs lacs

methodology for settlement of intra state ui a c for delhi utilities inter state ui account31
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

1. Additional UI amount

b) Adjustment as per Para ‘E’

all figures are in Rs lacs

methodology for settlement of intra state ui a c for delhi utilities inter state ui account32
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

2. Differential Cap Amount

a) As per UI Regulations

all figures are in Rs lacs

methodology for settlement of intra state ui a c for delhi utilities inter state ui account33
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

2. Differential Cap Amount

a) Adjusted as per para ‘F’ of previous slides

all figures are in Rs lacs

methodology for settlement of intra state ui a c for delhi utilities inter state ui account34
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

3. UI Amount for Utilities

a) As per intrastate accounts

all figures are in Rs lacs

methodology for settlement of intra state ui a c for delhi utilities inter state ui account35
Methodology for settlement of Intra State UI a/c for Delhi Utilities & Inter State UI account

3. UI amount matching with the Interstate UI account

a) As per para ‘G’

all figures are in Rs lacs

slide36
Net UI payable/receivable by Utilities at intrastate level = Additional UI amount (with reference to interstate (para ‘E’) +/- Differential cap Amount (with reference to interstate (para ‘F’) +/- Capped UI amount (with reference to interstate UI account (para ‘G’) all fig in Rs Lacks
slide37
THANKYOU

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