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

 

RECONNECT ENERGY WINS SMART STARTUP OF THE YEAR AWARD

We are happy to announce that REConnect Energy has won the Platinum Award in the ISGF Innovation Awards, 2018  in the Smart Startup of the Year category.

 

 

Go on the link to watch a brief video of the innovations done by REConnect Energy in the Renewable Sector: Youtube link.

 

PETITION ON BACKING DOWN ORDERS ON ELECTRICITY GENERATION DISMISSED BY RERC

A petition has been filed by Renew Wind Energy, Ostro Renewables, Mytrah Vayu and CLP Wind Farms against Rajasthan SLDC and Rajasthan Rajya Vidyut Prasaran Nigam Ltd against the unlawful and unpredictable instructions issued by SLDC for backing down of generation of electricity. Wind generation companies argued that SLDC had issued backing down orders in the past giving grid stability as one of the reason. They also pointed out that the backing down orders were random in nature and were given despite providing regular day-ahead forecasts to SLDC

 

To this the SLDC had responded that such orders were given to RE generators only after they had been given to the generators of conventional energy. Also, the reasons for the orders had been duly noted by the SLDC to ensure transparency.

 

The commission held a hearing and after which, it made the decision to dismiss the petition and SLDC has been warned to issue backing down orders to RE generators strictly based on the Grid Code and a record of backing down and its reason shall be maintained.

 

The order can be accessed here.

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.

ANALYSIS OF MPERC DRAFT REGULATIONS ON FORECASTING, SCHEDULING, DEVIATION SETTLEMENT OF WIND AND SOLAR GENERATING STATIONS

Madhya Pradesh Electricity Regulatory Commission (MPERC) has published draft regulations for forecasting and scheduling for wind and solar projects. Important aspects of the regulation are discussed below.

Earlier Odisha, Gujarat, Karnataka, Tamil Nadu, Rajasthan, Jharkhand, Andhra Pradesh and Chhattisgarh had come out with their draft DSM Regulation on Forecasting & Scheduling of Wind & Solar.  So far, Karnataka is the only state that has published final regulations.

Executive Summary:

  • Forecasting and scheduling will be mandatory for all the wind and solar generators connected to the State grid, including those connected via pooling stations.

  • Error will be calculated on the basis of Available Capacity (AvC), with permissible deviation of ±15% for old wind projects and ±10% for new wind projects (i.e., projects commissioned after May 2017).

  • Settlement will be done through the “Qualified Coordinating Agency” or QCA. However there is no mention of Aggregation.

  • The Deviation charges shall be paid within 10 days of the issue of Statement of Charges for Deviation into the “State Deviation Pool Account”.

  • 16 intraday revisions will be allowed for wind and solar energy (one revision every 1.5 hours). Revisions will be effective starting from 4th time block onwards.

  • QCA will be treated as a state entity, registered with SLDC. The preparation and settlement of ‘Deviation Pool Accounts’ shall be undertaken on weekly basis coinciding with mechanism followed for regional energy accounts.

  • SCADA & Telemetry data is to be mandatorily provided to SLDC by the generators. SLDC shall formulate Data/information exchange requirements and protocols for the same.

Detailed Analysis:

MPERC has recently come up with draft regulation for forecasting and scheduling and deviation settlement mechanism. The primary objective is twofold: a) facilitate large-scale grid integration of solar and wind generating stations b) maintaining grid stability and security. Highlights of the draft regulation are below:

Applicability:

All Wind & Solar Pooling sub-stations, irrespective of their capacity, commissioning date and connectivity voltage level, have to provide a day-ahead and intra-day revisions to a maximum of 16/day, and one revision for each 1.5Hr interval.

Error calculation and penalty bands:

  • Payment for generation shall be as per actual generation (this is different from the inter-state regulation, where payment is on the basis of scheduled generation).

  • Error is calculated based on Available Capacity (this is same as in the case of draft regulations of TN, Gujarat, Odisha, Rajasthan and Jharkhand).

  • The deviation slab has been kept as (+/-) 10% for new projects and (+/-) 15% for old projects. The reference date for old and new projects is 26.5.2017.

Detailed Mechanism defined for Deviation Settlement

 

In case of Intra-State transmission, Penalty Mechanism for wind generating station or pooling station commissioned prior to 26.5.2017

 
In case of Intra-State transmission, Penalty Mechanism for wind generating station or pooling station commissioned after to the regulations are notified.
It is to be noted that the new projects commissioned after the regulations are notified, have to comply by stricter deviation norms, and may have to consider the costs and liabilities of this mechanism in their project financial planning.

ANALYSIS OF GERC DRAFT REGULATION ON FORECASTING, SCHEDULING, DEVIATION SETTLEMENT OF WIND AND SOLAR GENERATING STATIONS

Gujarat Electricity Regulatory Commission (GERC) has published draft regulations for forecasting and scheduling for wind and solar projects. Important aspects of the regulation are discussed below.

Earlier Odisha, Madhya Pradesh, Karnataka, Tamil Nadu, Rajasthan, Jharkhand, Andhra Pradesh and Chhattisgarh had come out with their draft DSM Regulation on Forecasting & Scheduling of Wind & Solar.  So far, Karnataka is the only state that has published final regulations.

The last date for giving comments and suggestions is 16th February 2017.

 

Executive Summary:

  • Forecasting and scheduling will be mandatory for all the wind and solar generators connected to the State grid, including those connected via pooling stations.
  • Error will be calculated on the basis of Available Capacity (AvC), with permissible deviation of ±12% for old wind projects and ±8% for new wind projects (ie, projects commissioned after Jan 2010). Permissible deviation for solar project will be ±7%.
  • Aggregation of more than one pooling station is allowed.
  • Penalty rates are different than those in the model FOR regulations. For wind, the initial penalty is Rs 0.35/unit, increasing to Rs 0.70 and Rs 1.05 per unit in higher penalty bands. For solar, the initial penalty is Rs 0.60/unit, increasing to Rs 1.2 and Rs 1.8 per unit in higher penalty bands.
  • 16 and 8 intraday revisions will be allowed for wind and solar energy respectively (one revision every 1.5 hours). Revisions will be effective starting from 4th time block onwards.
  • Settlement will be done through the “Qualified Coordinating Agency” or QCA. QCA will be treated as a state entity, registered with SLDC.
  • SCADA & Telemetry data is to be mandatorily provided to SLDC by the generators. SLDC shall formulate Data/information exchange requirements and protocols for the same.

 

Detailed Analysis:

GERC has recently come up with draft regulation for forecasting and scheduling and deviation settlement mechanism. The primary objective is twofold: a) facilitate large-scale grid integration of solar and wind generating stations b) maintaining grid stability and security. Highlights of the draft regulation are below:

Applicability:

All Wind & Solar Pooling sub-stations, irrespective of their capacity, commissioning date and connectivity voltage level, have to provide a day-ahead and a three day ahead schedule, and intra-day revisions to a maximum of 16/day for wind and 8/day  for solar energy.

Aggregation of more than one pooling station by the QCA will be allowed.

Error calculation and penalty bands:

  • Payment for generation shall be as per actual generation (this is different from the inter-state regulation, where payment is on the basis of scheduled generation).
  • Error is calculated based on Available Capacity (this is same as in the case of draft regulations of TN, MP, Odisha, Rajasthan and Jharkhand).
  • The deviation slab has been kept as (+/-) 12% for old projects and (+/-) 8% for new projects. The reference date for old and new projects is 30.01.2010.
  • Unlike all other DSM regulations, the absolute error for wind energy generators will be reduced by 1% every year from start of fourth year till subsequent 5 years.
  • At the end of 5th year the absolute error shall become <=7% for old projects and <=3% for new projects in case of wind projects.
  • Similarly in case of solar projects the absolute error shall be reduced by 1% every year from start of the fourth year till subsequent 5 years, reaching the minimum of <=2%.
  • Penalty is calculated at fixed amounts per unit (whereas, for Inter-state it is calculated as a percentage to PPA rate).
  • A tripartite agreement will be formed amongst the Generator, QCA and SLDC, in case the generator fails to pay the deviation charges within specified timeline.
  • Energy accounts shall be prepared by SLDC on 10 day basis.
  • De-pooling shall be done in proportion to available capacity, energy generated in each time block, absolute error of individual generator or any other methodology between QCA & Generators.

 

Detailed Mechanism defined for Deviation Settlement

In case of Intra-State transmission, Penalty Mechanism for wind generating station or pooling station commissioned prior to 30.01.2010

 

 

In case of Intra-State transmission, Penalty Mechanism for wind generating station or pooling station commissioned after to 30.01.2010

In case of Intra-State transmission, penalty mechanism for solar generating station or pooling station

A brief comparison of the draft regulation of the 6 states and the Model Regulation is given in the table below:

 

QCA:

The qualified coordinating agency (QCA) will be required to meet certain eligibility criterion. Briefly, these are:

  • Providing F&S services for more than 2 years
  • Having a net-worth of more than Rs 2.5 crore
  • Have experience of working in different “terrains and regions”
  • QCA should have a well qualified team in-house, including skills of data science, statistics and software development
  • QCA should be using software of a “at least CMMI Level 3 certified” company

 

Karnataka defers implementation of Forecasting & Scheduling regulation

The  F&S regulation was notified on 31st May 2016 by Karnataka Electricity Regulatory Commission, with 6 months warming period given to all stakeholders, after which the commercial settlement scheme was to be implemented from December this year. Karnataka had become the first state in India to come out with final regulations for Forecasting and Scheduling.

However, KERC has deferred the implementation of the regulation by six months. Wind and solar generators will now be required to comply with the regulations from 1 June 2017.

The notification can be accessed here.

Analysis of Regulation on Forecasting and Scheduling of Wind and Solar Generating Stations at State level in Andhra Pradesh

In the follow-up after the FOR – Model Regulation for the Intra State level projects, APERC has come out with a Draft Regulation on Forecasting & Scheduling for the Wind & Solar projects at Intra State level in Andhra Pradesh, based on the mechanism suggested in the Model Regulation. Earlier Odisha, Madhya Pradesh, Karnataka, Tamil Nadu, Rajasthan and Chhattisgarh had come out with their DSM Regulation on Forecasting & Scheduling of Wind & Solar.

Executive Summary:

  • Forecasting and scheduling will be mandatory for all the wind and solar generators connected to the AP State grid and connected via pooling stations irrespective of their capacity (MW) and date of commission of the plant.
  • Deviations will be calculated on the basis of Available Capacity (AvC).
  • The deviation slab has been kept as (+/-) 10% for all the wind and solar generators beyond which penalty is applicable at fixed rate as defined below. Whereas the deviation slab for plants commissioned prior to the effect of the regulations is kept at (+/-) 15%.
  • Settlement will be done through the “Qualified Coordinating Agency” or QCA, or the “Aggregator”.
  • SCADA & Telemetry data is to be mandatorily provided to SLDC. Protocols for the same shall be determined later by the SLDC through the detailed procedures.
  • Provision of six months for existing wind and solar generators to comply with the regulation from the date of publication of these regulations in the official gazette.
  • All the new wind and solar generators which shall be commissioned after six months from the effective date of the regulation shall comply these norms before commissioning of the project and connecting with the state grid.
  • 16 revisions allowed during the intraday with each revision effective from 4th time block.
  •  Payment for generation shall be as per the actual generation.

Detailed Mechanism defined for Deviation Settlement

In case of Intra-State transmission, Penalty Mechanism for existing generators:

In case of Intra-State transmission, Penalty Mechanism for new generators:

The regulation can be accessed here.

 

Analysis of Regulation on Forecasting and Scheduling of Wind and Solar Generating Stations at State level in Karnataka

In the follow-up after Draft Regulation on Forecasting & Scheduling for the Wind & Solar projects at Intra State level in Karnataka and based on the mechanism suggested in the Model Regulation, KERC has finally released the notification for DSM regulation on Forecasting and Scheduling for wind and solar in Karnataka.

Executive Summary:

 Forecasting and scheduling will be mandatory for all wind generators having a combined installed capacity of 10 MW and 5 MW for wind and solar respectively at the pooling station.

 Deviations will be calculated on the basis of Available Capacity (AvC).

 The deviation slab has been kept as (+/-) 15% for all the wind and solar generators beyond which penalty is applicable at fixed rate as defined below.

 Settlement will be done through the “Qualified Coordinating Agency” or QCA, or the “Aggregator”.

 SCADA & Telemetry data is to be mandatorily provided to SLDC. Protocols for the same shall be determined later by the SLDC through the detailed procedures.

 Provision of six months for existing wind and solar generators to comply with the regulation from the date of publication of these regulations in the official gazette.

 All the new wind and solar generators which shall be commissioned after six months from the effective date of the regulation shall comply these norms before commissioning of the project and connecting with the state grid.

 16 revisions allowed during the intraday with each revision effective from 4th time block.

 Payment for generation shall be as per the actual generation.

Error Calculation:

% Error (deviation) = 100 x (Actual Generation – Scheduled Generation)/ Available Capacity (AvC)

The penalty mechanism based on % deviation for all obligated generators:

The final order can be accessed here.

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