Coordinated operation of wind power and other resources considering power system requirements

Abstract

Wind power is inherently variable, and thus it brings significant challenges to the operation of electric power systems. Noting that there really exist many controllable and dispatchable resources in power systems, the coordination of wind power and these resources provides the possibility of overcoming the drawbacks of wind power. This paper discusses the determination of the coordination objectives of wind power and other resources. The key idea is that the coordination objectives should match with the operation requirements of real power systems. (1) For an integrated wind plant, the coordination objective is that the output of wind plant should meet the grid code requirement. In this regard, a coordinated control method of a wind-energy storage system to meet the ramp rate limit of grid code is proposed. (2) For an area with a high penetration of wind power, the coordination objective is that the output of regional hybrid system should contribute to the active power balance of the whole power system. In this regard, a coordinated dispatch method of wind-thermal-pumped hydro hybrid system (regional hybrid system) to make the combined output follow the trend of system load is established. Case studies are conducted to verify the feasibility of the proposed methods.