Load Scheduling Process
The procedure starts along with the Central Generating Stations (CGS) in the region declaring their expected output capability (in MW) for 96 slots of 15 minutes duration during the next day to the Regional Load Dispatch Centre (RLDC). The RLDC breaks up and tabulates these results capability declarations as per the beneficiaries' plant-wise shares and conveys their entitlements to State Load Dispatch Centres (SLDCs). The latter then carry out an exercise to see how best they could meet the load of their consumers over the day, from their own producing stations, along with their entitlement in the Central stations. They also take within account the irrigation release requirements, distribution utilities' load schedules for next day and load curtailment, etc. in which they propose within their respective areas.
The SLDCs then convey to the RLDC their schedule of power drawl from the Central stations (limited to their entitlement for the day). A RLDC aggregates these requisitions and determines a dispatch schedules for the Central generating stations and the drawl schedules for the beneficiaries (State as a overall) duly incorporating any bilateral agreements and adjusting for transmission losses. Those schedules are then issued through the RLDC to all concerned and become the operational as well as commercial datum for inter-State and CGS transactions.
Therefore, in case of contingencies, Central stations can prospectively revise the output capability declaration, beneficiaries could prospectively revise requisitions, and the schedules are correspondingly revised through RLDC. It is for the SLDCs to additional break-up these State entitlements into Discom entitlements and State Generation Schedules.While the schedules so finalized become the operational datum, and the regional constituents are expected to regulate their generation and consumer load in a way in which the actual generation and drawls commonly follow these schedules, deviations are permitted as long as they do not endanger the system security.