全钒液流电池储能系统的仿真研究

储能具有调峰幅度大、响应速度快等优点,对未来电网发展具有深远的影响。近年来,储能技术迅猛发展,为充分发挥全钒液流电池储能系统相较于传统电池储能技术的优势,对全钒液流电池储能系统进行了仿真研究。首先,根据全钒液流电池的基本结构分析了其原理及特性,搭建了全钒液流电池的电气模型。然后,对储能逆变器连接储能电池和电网的两种控制策略,定功率(PQ)控制策略和定电压频率(VF)控制策略分别进行了建模和仿真验证。最后,以北海热电厂为实际应用场景,将所搭建的储能电站模型应用于黑启动方案中。启动储能逆变器后,北海热电厂的厂用母线电压可以稳定维持在0.96 p.u,表明了利用储能电站进行黑启动的可行性,验证了储能电站模型的有效性。

Simulation research on vanadium redox battery energy storage power station

The energy storage has the advantages of large peak amplitude and fast response,which has a profound impact on the future development of the power grid.In recent years,the energy storage technology has developed rapidly.In order to give full play to the advantages of vanadium redox battery energy storage system compared with the traditional battery energy storage technology,the simulation study of vanadium redox battery energy storage system is carried out.Firstly,according to the basic structure of vanadium redox battery,the principle and characteristics are analyzed and the electrical model is built.Then,the two control strategies of the energy storage inverter connecting the energy storage battery to the power grid,the fixed power(PQ)control strategy and the constant voltage and frequency(VF)control strategy are respectively modeled and verified.Finally,the model of the energy storage power station was applied to the black start scheme,taking the Beihai Thermal Power Plant as a practical application scenario.After starting the energy storage inverter,the plant bus voltage of Beihai Thermal Power Plant can be stably maintained at 0.96 p.u,indicating the feasibility of using the energy storage power station for black start and verifying the effectiveness of the energy storage power station model.