A transaction mechanism for flexible ramping products with the participation of hydropower

Abstract

With the continuous increase in the proportion of integrated renewable energy in recent years， more flexible resources are required to cover their volatility and uncertainty. In order to stimulate the fast-ramping resource represented by hydropower to participate in the flexible ramping market， it is necessary to establish a transaction model for flexible ramping products. A two-stage day-ahead and intra-day rolling optimization model for the joint dispatch of thermal power units and hydropower units is constructed in this paper. In the day-ahead stage， the constraint of the generated electrical energy from hydropower is considered. Then the combination of thermal power units and the reference output of hydropower are given. In the intra-day stage， the acquisition of flexible ramp capability is considered to determine the actual output of thermal power and hydropower. The testing results are used to verify the effectiveness of the model. It. Is demonstrated that the model gives full play to the excellent regulating function of hydropower and is of great significance to ensure the safe and stable operation of the power system and reduce the cost of market operation.

Keywords

• flexible ramp capability
• hydropower
• market-oriented
• rolling dispatch