Research On Coordinated Operation Of Power Stations Group Composed Of Pumped Storage Station And Wind-PV Power System

Renewable energy including wind energy and solar energy is considered as intermittent randomness energy restricted by natural conditions. Large-scale development of wind energy and solar power system will have a greater negative influence on power system, but can be converted into a reliable power by pumped storage power station, to achieve the goal of effectively reducing the impact on the grid. This paper studies on the feasibility of supporting construction pumped storage power station.This paper analyzes the performance characteristics of pumped storage power stations, output characteristics of wind farms, photovoltaic plant and wind-PV hybrid power supply system. Based on complementation of wind farms and photovoltaic plant, the paper tries to configure pumped storage power station for wind farms and photovoltaic plant, composes hybrid power system. In order to improve stability and schedulability of the wind power and photovoltaic power generation more efficaciously, the paper need to forecast output power of the wind farm and photovoltaic power stations, predicts the short-term power output of photovoltaic power generation system using support vector machines, and achieves good results. Based on analysis and forecast of output power, under the premise of maximize the use of wind power and photovoltaic power, considering the constraints of storage capacity and power transmission capacity, this paper establishes an optimization model of the pumped storage power station suited to characteristics of china, uses genetic algorithm for solving the model. Finally, the paper uses method of opportunity cost, analyzes static benefits and dynamic benefits of pumped storage power stations by means of qualitative and quantitative.The results show that coordinated operation of pumped storage station and wind-PV power system is an effective way of development and utilization of wind energy resources and solar resources, not only increasing benefit of wind farm and photovoltaic plant, but also smoothing output of wind farm and photovoltaic plant, with considerable economic and social benefits.