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.

Wind producers in TN favouring power forecasting & scheduling

As per an article in The Hindu, Tamil Nadu a leader in wind power generation (installed capacity of around 7200 MW) in the country has, off late, been disappointing its wind power producers. TN’s state distribution company (TANGEDCO) has been shying away from purchasing power generated from these generators owing to poor evacuation facility and a “Banking” clause which empowers generators to claim the power previously injected into the grid.

Wind power producers have been making huge losses as TANGEDCO continues to discard the power that is being generated from these wind machines. But a positive side as a consequence of this, seems to be tilting in favour of forecasting & scheduling. Hon’ble CERC had recently barred all commercial settlements envisaged under the RRF mechanism.

Wind power producers (in same article) are betting on forecasting & scheduling to serve as a saviour for them. They say that an estimated declaration of power to be injected, beforehand, is expected to address most issues of TANGEDCO.

More on RRF mechanism can be learned by visiting the following links –

Link 1

Link 2

Link 3

Renewable energy management centers to be established – CEA

Central Electricity Authority (CEA) recently unveiled a report on ” Large Scale Grid Integration of Renewable Energy Sources – Way Forward”. From the point of view of grid security and resource adequacy during operation, the CEA has realized, that forecasts are crucial.  In the report, CEA has emphasized establishment of Renewable Energy Management Centers (REMCs) which shall be bestowed with forecasting responsibilities in respect of renewable power.

CEA recommends REMCs to be co-located with respective load dispatch centres at state, regional and national level with hierarchical coordination. For maintaining load generation balance of the state, states will have to co-ordinate with REMCs. The forecast data of REMCs will be shared with SLDCs, who will in-turn be responsible for scheduling.

Acknowledging the recently launched mechanism under “Renewable Regulatory Fund”, CEA quotes the following –

“The above provision of flexibility in scheduling only provides commercial compensation to the host states for deviating from the schedule on account of  RES but does not absolve the state SLDC of the responsibility to comply with the IEGC.”

This implies that CEA wants SLDCs to take more responsibility towards variability in renewable generation. Although, CEA was mute on sharing of forecast data with the “coordinating agencies”. 

The report can be assessed here.

To know more about RRF mechnism – Click Here or you may get in touch with us.

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