储能系统逆变器虚拟同步机控制算法研究

由于风力发电机等分布式电源的渗透率逐渐提高,对电力系统的无功平衡、电压质量和电压稳定性等因素也产生越来越多的负面影响。为提高电力系统稳定性和电压质量,以储能系统为后备支持,提出了基于虚拟同步发电机(VSG)控制的储能系统控制方法。该方法包括同步发电机(SG)的电气部分、励磁部分和机械部分,使变换器具有同步发电机的特性,可精确控制储能系统输出的有功和无功功率。最后通过Matlab/Simulink仿真模型验证了该控制方法的可行性。研究成果可为新能源并网系统安全控制提供参考。

Virtual Synchronous Generator Control Algorithm for Inverter in Energy Storage System

Due to the increase of permeability of distributed power sources, such as wind turbines, more and more negative effects are caused by reactive power balance, voltage quality and voltage stability of the power system. In order to improve the stability and voltage quality of the power system and to back up the energy storage system, an energy storage system control method based virtual synchronous generator (VSG) is proposed. This method comprised the electrical part, the excitation part, and the mechanical part of the synchronous generator in order to make the converter having the characteristics of a synchronous generator, which can precisely control the active and reactive power. Finally, the feasibility of this control method is verified by a simulation model in Matlab/Simulink. The research results can provide reference for the safety control of new energy grid-connected system.