Demand response in the electricity market involves the targeted reduction of electricity use during times of high demand. In response, customers receive incentives for these reductions. A recent Supreme Court ruling is expected to result in faster growth in demand response in the wholesale electricity markets that cover about 60% of U.S.
Demand response is one element of demand-side management, which includes increased adoption of energy efficient equipment at residential, commercial, and industrial customer locations. Some programs allow electric power system operators to directly reduce customers' load by temporarily turning off cooling equipment or industrial processes, for instance. In other programs, customers retain control and can choose to participate in announced demand-response events. Equipment such as advanced metering systems and appliances that can be remotely cycled by grid operators (for example, air conditioners and water heaters) is a component of demand-response programs.
Because demand-response actions often occur during times of peak electricity demand, demand response provides value to the electric system in several ways. Lower demand means that less efficient, and often more expensive, forms of electricity generation do not need to come online during times of high demand. Reducing the amount of demand often results in lower wholesale electricity prices. Less demand means less stress on transmission and distribution systems, making them less likely to fail.