Analysis of Model Regulations on Forecasting and Scheduling of Wind and Solar Generating Stations at State Level
As you may be aware, CERC had notified forecasting and scheduling (F&S) regulation for inter-state sale of power a few months back. Now, with the intent of having compatible regulations, the Forum Of Regulators (FOR) has come up with model regulations. It is expected that states will adopt this model regulation or something on these lines in the near future.
Executive Summary:
- Forecasting and scheduling will be required by all wind and solar project, regardless of the date of commissioning and capacity
- Deviations will be calculated on the basis of total available capacity
- Penalty is a fixed amount beyond the error range (10% in case of new projects, 15% in case of old projects)
- Settlement will be done through the “Qualified Coordinating Agency” or QCA.
Detailed Analysis:
Forum of Regulators have recently come up with model regulation for forecasting and scheduling and deviation settlement mechanism. The primary objective is two fold: a) facilitate large-scale grid integration of solar and wind generating stations, and b) maintaining grid stability and security.
Highlights of the model regulation are below:
– All solar and wind generators connected to State grid have to provide day-ahead and week-ahead schedule
– Revisions can be made on a one-and-half hourly basis.
– 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). .
– The deviation slab has been narrowed for upcoming projects (i.e., +/-10%) but has been kept as (+/-)15% for existing generators at Intra-state level
– Penalty is calculated at fixed amounts per unit (whereas, for Inter-state it is calculated as a percentage to PPA rate)
– RPO accounting can continue as per existing arrangement, and needs no change.
Applicability of Regulations
All wind and solar generators connected to the State grid are covered:
- regardless of date of commissioning,
- including those connected via pooling stations
- selling power within or outside the state.
Deviation calculation both for Inter-state and Intra-state has been kept as :
*Available Capacity would ideally be the Installed Capacity, unless any of the turbines are on outage. Similarly for solar panels.
In case of Intra-State transmission, Penalty Mechanism for existing generators :
In case of Intra-State transmission, Penalty Mechanism for up-coming generators :
The detailed Regulation can be accessed here.