Telangana announces final DSM regulations for wind and solar

Recently TSERC announced regulations on wind and solar forecasting, scheduling regulations, 2018. This is the final regulation and with this Telangana became the sixth, and latest, state to implement Forecasting and Scheduling regulations.

The detailed summary of the regulations is as below:

  • Title of the Regulation: Telangana State Electricity Regulatory Commission (Forecasting, Scheduling, Deviation Settlement and Related Matters for Solar and Wind Generation Sources) Regulations, 2018.The Telangana Forecasting regulation has been finalized within two months of the release of draft regulation.
  • Applicability:
      • From the date of publication in the official gazette.
      • Forecasting tool to be established in three months period.
      • Levy and collection of DSM Charges shall commence after six months from the date of publication in the official gazette.
  • Regulation Applicable on: All grid-connected Wind and Solar Power Generators (except Rooftop PV Solar Power Projects) connected to a pooling substation of the capacity not less than 5 MW irrespective of commissioning date.
  • Deviation Accounting:  The deviation accounting will be carried out based on the Available Capacity:
  • Absolute Error in % =   100 x  Actual Generation – Scheduled Generation  ⁄ Available Capacity (AvC)
  • Point of Forecasting: Pooling Station or STU Feeder where the injection is made.
  • Aggregation: Unlike in Karnataka and AP, Telangana’s order of F&S does not have a provision to provide an aggregated forecast.
  • Role of a QCA:
      • Provide day ahead, week -ahead schedule generator wise and aggregated schedule for each pooling station and the periodic intraday revisions.
      • Coordination with DISCOM/STU/SLDC for metering, data collection, communication/issuance of dispatch/curtailment;
  • Provide day ahead, week- ahead schedule generator wise and aggregated schedule for each pooling station and the periodic intraday revisions.
      • Coordination with DISCOM/STU/SLDC for metering, data collection, communication/issuance of dispatch/curtailment;
      • De-pooling of charges among generators:
      • Commercial settlement of DSM charges on a weekly basis and
      • All other ancillary and incidental matters.
  • Revisions:
      • 16 revisions are permitted for Wind Generators starting from 00:00 Hrs of the day.
      • 9 revisions are permitted for Solar Generators starting from 05.30Hrs of the day.
      • All the revisions are effective from the 4th time-block.
  • Other Key Points:
    • DSM Settlement will be done on a Weekly basis, with Meter data to be provided by SLDC, and verification to be done in coordination with SLDC.
    • After recovering DSM amounts, if there is a gap between the actual commercial impact for the state as a result of deviation of wind and solar generation, such amount will be further recovered from each generator.
    • The wind and solar generator or the QCA will provide payment security to SLDC by the way of BG or revolving LC which will cover the DSM payment for 6 months.
    • De-pooling will be done in proportion to energy injected in each time block by each generator.
    • The QCA will only be forecasting on PSS level. Aggregation to create a virtual pool/aggregate of multiple substations is not allowed. States like A.P and Karnataka have allowed Aggregation in their final regulations.
  • Important differences between intrastate and interstate transactions:
    • The deviations for Inter-State and Intra-State transactions at Pooling Station will be accounted for separately. Separate schedules have to be sent for the interstate to SLDC and RLDC.
    • The Inter-State transactions will be settled on the basis of their scheduled generation and will be considered only if the Inter-state capacity is connected to the STU via the separate feeder.
    • The Generator will pay the Deviation Charges for under or over injection applicable within Telangana in case of deviations in the State DSM Pool.          

 Deviation Charges in case of under or over-injection for sale/supply of power within the State

Sr. No

Absolute Error

DSM Charges Payable to State Pool Account
1 ≤ 15% None
2 >15% but ≤ 25% At Rs. 0.50 per unit
3 >25% but ≤ 35% At Rs. 1 per unit
4 >35% At Rs. 1.50 per unit

Deviation Charges in case of under or over-injection for sale/supply of power outside the State

Inter-state Deviation Charges will follow the same mechanism as defined by CERC (PPA linked). However, the final deviation settlement for Inter-state generators shall be done by SLDC on the basis of deviations and its impact at state periphery.

The TSERC Regulation for Forecasting & Scheduling, 2018 has provided a summary of timelines designating the activities to QCA and SLDC, to be accomplished within the following stipulated duration.

Sr. No. Activity/Milestone Action By Duration (Months)
1 Technical Specification and Information Sharing protocol by QCA to SLDC SLDC 3
2 Forecasting tool, alternate means of communication, formats for submission SLDC 3
3 Forecasting tools to be established by QCAs QCA 3
4 Guidelines for registration of QCA, data exchange between QCA and SLDC SLDC 2
5 Manner of making State Pool Account and settlement thereof SLDC 3
6 Detailed Procedures covering plan for data telemetry SLDC 3
7 Trial Run –During this period all parties shall comply with the above All 6
8 Commencement of commercial arrangement. All 6

 

RERC DETERMINES FINAL FORECASTING AND SCHEDULING REGULATIONS

The Rajasthan Electricity Regulatory Commission (RERC), in an order dated 14/09/2017, has released final regulation on forecasting, scheduling and deviation settlement mechanism for solar and wind generation plants. With these regulations, Rajasthan has become the third state to have final regulations in place. The salient features of the regulations are as follows:

 

Executive Summary:

  • Title of the Regulation: Rajasthan Electricity Regulatory Commission (Forecasting, Scheduling, Deviation Settlement and Related Matters of Solar and Wind Generation Sources) Regulations, 2017

  • Applicability:

    • From the date of publication in the official gazette.

    • SLDC to issue detailed guidelines for QCA registration, scheduling procedures, communication protocols and formats etc., for the approval of the Commission.

    • Levy and collection of DSM Charges shall commence from Jan 1st, 2018

  • Regulation Applicable on: All grid connected Wind and Solar Power Generators with pooling station capacity >5MW or, when directly connected to the state grid, having individual or combined capacity >5MW.

  • Deviation Accounting:

  • Point of Forecasting: Pooling Station or STU/DISCOM Feeder where injection is made.

  • Aggregation: Unlike in Karnataka and AP, Rajasthan’s order of F&S does not have a provision to provide aggregated forecast.

  • Role of a QCA:

    • Provide forecast, schedules and periodic revisions;

    • Coordination with DISCOM/STU/SLDC for metering, data collection, communication/issuance of dispatch/curtailment;

    • Commercial settlement of DSM charges and de-pooling of charges among generators;

    • All other ancillary and incidental matters.

  • Revisions:

    • 16 revisions are permitted starting from 00:00 Hrs of the day for Wind & Solar Generators

    • All the revisions are effective from the 4th time-block

  • Important differences between intrastate and interstate transactions:

    • Wind and Solar generators having common interface meter at a pooling station but carrying out both – interstate and intrastate transactions at the same pooling station, the scheduling for the same shall to be carried out separately.

    • Approved open-access capacity (in MW) in such cases alone shall be considered as AvC for the purpose of DSM charges calculations.

Observation: Since the regulation permits common interface meter for such transactions and AvC determination is also clarified, the DSM charges may be computed in pro-rata basis for such pooling station as the common interface meter would only provide Pooling Station level actual generation.

  • Determination of DSM Charges for INTRASTATE transactions:

  • Determination of DSM Charges for INTERSTATE transactions:

 

 

The order can be accessed here.

APERC DETERMINES WIND AND SOLAR FORECASTING AND SCHEDULING REGULATION

Andhra Pradesh Electricity Regulatory Commission (APERC) has released its forecasting, scheduling and Deviation settlement of solar and wind generation on 21/08/2017.

Executive Summary:

★ Applicability:

○ Regulation is effective from Aug 21st, 2017.

○ SLDC to issue detailed guidelines for QCA registration, scheduling procedures, communication protocols and formats etc., on or before Dec 1st, 2017.

○ Forecasting, Scheduling and Deviations Settlement shall commence from Jan 1st, 2018.

Further, generators commissioning on or after Jan 1st, 2018 shall not be allowed to be commissioned unless they start providing schedules as per this regulation.

○ Levy and collection of DSM Charges shall commence from Jul 1st, 2018

★ Regulation Applicable on: All the GRID Connected Wind and Solar Power Generators in AP.

★ Deviation Accounting:

★ Point of Forecasting: Pooling Station or STU/DISCOM Feeder where injection is made.

★ Virtual Pool: To enable benefits of larger geographical area and diversity, aggregation of forecast is permitted under “Virtual Pool” where Generators have an option to account for their deviations at an aggregated level through a Qualified Coordinating Agency (QCA).

○ A similar provision is also permitted in Karnataka by Hon. KERC in its final regulation which is already being implemented w.e.f 1st June 2017.

 

★ Role of a QCA:

○ Provide forecast, schedules and periodic revisions;

○ Coordination with DISCOM/STU/SLDC for metering, data collection, communication/issuance of dispatch/curtailment;

○ Commercial settlement of DSM charges and de-pooling of charges among generators;

○ All other ancillary and incidental matters.

★ Important differences between wind and solar power scheduling:

○ 16 revisions (excluding collective transactions) are permitted starting from 00:00 Hrs of the     day for Wind Generators

○ 9 revisions (excluding collective transactions) are permitted starting from 05:30 Hrs upto 19:00 Hrs of the day for Solar Generators

○ All the revisions are effective from the 4th time-block

○ Aggregation “seems” to be allowed between wind and solar generation as the concept of virtual pool aims to capture not only the larger geographical area but also the diversity (among different asset class).

 

★ Important differences between intrastate and interstate transactions:

○ Wind and Solar generators having common interface meter at a pooling station but carrying out both – interstate and intrastate transactions at the same pooling station, the scheduling for the same shall to be carried out separately.

○ Approved open-access capacity (in MW) in such cases alone shall be considered as AvC for the purpose of DSM charges calculations.

■ Observation: Since the regulation permits common interface meter for such transactions and AvC determination is also clarified, the DSM charges may be computed in pro-rata basis for such pooling station as the common interface meter would only provide Pooling Station level actual generation.

 

○ Further, aggregation is permitted only for similar type of transactions i.e., interstate transactions are not allowed to be aggregated with intrastate transactions for the purpose of DSM charges determination.

○ QCA shall separately settle DSM charges for intrastate and interstate transactions.

★ Determination of DSM Charges for INTRASTATE transactions:

Note: DX is the absolute error in kWh for a given error band starting from X% as outlined in column 2.

 ★ Determination of DSM Charges for INTERSTATE transactions: 

Note: DX is the absolute error in kWh for a given error band starting from X% as outlined in column 2.

MPERC Draft Demand Side Management Regulations, 2015

Madhya Pradesh Electricity Regulatory Commission (MPERC) came up with its Demand Side Management draft regulations, on 21st September 2015. It’s the State’s first initiative towards practicing a cost effective method of selecting, planning and implementing measures which intend to have an influence on demand side, either directly or indirectly.

  • The draft regulation describes the demand side management objectives, targets and guidelines.
  • The Distribution Licensee of State and shall undertake the load research to identify its target consumer segments and end uses for DSM programmes to build the necessary database.
  • Distribution Licensee shall formulate a perspective DSM plan covering period of the control period, within one year of notification of these regulations.
  • The benchmarks and DSM plans set by the commission will help the state achieve its objectives of:
    • Power shortage mitigation,
    • Seasonal peak reduction, cost effective energy savings,
    • Lowering the cost of electricity,
    • Reduction in emissions of greenhouse gases etc.

The commission invited comments and suggestions on the same till 29th September, 2015.

The relevant document can be accessed here.

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