introduction of sub-Hourly Market in Power exchanges and Facilitating large scale renewable energy integration in india

India has an electricity market design with multiple Power Exchanges in a single geographical area. The Power Exchanges commenced operations in 2008 with hourly bidding structure. In April, 2012, the hourly bidding format was changed to sub-hourly (15 minute) bidding format. The drivers of this transition include the need for coherence between Bidding and Scheduling Systems, Grid Integration of Renewables and Congestion Management. The collaborative effort of all the stakeholders in implementation of sub-hourly bidding and the impact of capacity building measures undertaken to ensure seamless transition to a sub-hourly electricity market in India has been discussed. The experience of sub-hourly market in India is presented with analysis on increased flexibility in bidding, smoothening of the price and volume variations along with interplay of Day-ahead prices in Power Exchanges and Real Time.