钒电池储能平抑三电平直驱式永磁同步风电机组功率波动研究

A Study of Stabilizing Control of Power Fluctuation with Vanadium Redox Battery Storage System for Three-level Direct-driven Wind Turbine with Permanent Magnet Synchronous Generator

为了改善2MW双三电平直驱式永磁同步风电机组的并网功率波动,提出网侧采用全钒液流电池(Vanadium Redox Flow Batter,VRB)储能的解决方案.在研究双三电平直驱式永磁同步风电机组系统模型、VRB储能系统等效电路、VRB储能系统平抑功率波动的控制策略的基础上,对变风速工况下采用VRB储能系统实现平抑并网功率波动进行了仿真研究,仿真结果表明,所采用的控制策略可实现风机稳定运行,直流侧电压稳定的控制.在变风速情况下,直驱式永磁风电机组输出功率波动明显,采用VRB储能系统控制后功率波动得到有效改善.

In order to improve the grid-connected power fluctuation of a 2 MW double thri-level direct-drive permanent magnet synchronous wind turbine,a solution with Vanadium Redox Flow Battery for energy storage（VRB）on the grid side was proposed in this paper.On the basis of studying the system model of dual three-level direct-drive permanent magnet synchronous wind turbine system,the equivalent circuit of VRB energy storage system,and the control strategies for stabilizing power fluctuation of VRB energy storage system,a simulation study was carried out to stabilize the fluctuation of the grid-connected power adopting VRB energy storage system under variable wind speed conditions.The simulation results show that the stable operation of wind power generator and the stable control of the DC side voltage are realized by the proposed control strategy.In the case of variable wind speed,the output power of direct-drive permanent magnet wind turbines fluctuates significantly.Power fluctuation is effectively stabilized and security is enhanced by using VRB storage system.