Study on zonal reserve model in power market

In regional electricity market, the procurement of zonal reserve deeply effects the power system security and economic. In this paper, the concept of zonal electrical price is extended to zonal reserve price. According to the framework that the system operator buys the cheap reserves and then checks the purchase scheme feasible under the most serious outage, a two-level model is presented. The model considers some important constraints, including transmission capacity limit of tie line, minimum local reserve and total reserve requirement. Solving the model not only can form the zonal reserve price, but also can get the rational pre-set scheme in serious outage. Furthermore, a new allocation method is suggested, i. e. the equivalent utilization ratio is formed on the basis of reserve pre-set scheme and the reserve cost is allocated on the basis of the equivalent utilization ratio. Case studies testify the validity and feasibility of this method.