The Electric Reliability Commission of Texas (ERCOT)'s new approach to grid management could lead to a $1.5 billion increase in electricity consumer bills, largely due to "conservative" ways of operating the power system and adjustments to scarcity pricing mechanisms. Although the cost is high, the additional power generation backup provided by the new system operation method can avoid the occurrence of power outages to a certain extent.
Texas continued to suffer from a heatwave in June, and grid demand hit a record 76,592MW on June 23. Nonetheless, the Texas wholesale electricity market has not been reformed, maintaining its current, more conservative way of operating.
A recent analysis by the Independent Market Monitor (IMM) shows that as of late June this year, ERCOT's conservative operating style has cost electricity consumers an additional $210-385 million. In addition, as of May 2022, the change in the demand curve for ERCOT's operating reserve also cost consumers an additional $475 million. Despite the high cost of operating this way, regulators say the reliability of the Texas grid is improving, noting that the new power system operation provides generation backup that can help protect against power outages.
ERCOT does not have a capacity market, but relies on high energy prices to ensure sufficient power generation. Faced with possible market distortions, Potomac Economics proposes to implement real-time collaborative optimization to alternately dispatch energy and ancillary services, introducing uncertain ancillary service offerings to improve system flexibility.
