一种虚拟同步机直流侧混合储能系统控制策略

A Control Strategy for Hybrid Energy Storage System in Virtual Synchronous Generator DC-Side

为了解决分布式电源渗透率升高对电力系统稳定性的影响问题,国内外学者提出了虚拟同步发电机的控制策略,将同步发电机的转动惯量和阻尼特性引入到传统的逆变器控制中,提升了分布式电源的并网友好性。该文提出了虚拟同步发电机中蓄电池和超级电容混合储能系统的功率分配方法,对关键参数的整定进行了分析。搭建Matlab/Simulink仿真模型,分析了负载恒定、阶跃突变和连续变化情况下直流侧混合储能系统的功率分配效果,验证了所提功率分配方案的可行性和有效性。

To increase the stability of power system with the increasing permeability of distributed generators,domestic and foreign scholars put forward virtual synchronous generator control strategy,which introduces the rotational inertia and damping characteristics of synchronous generator into traditional inverter control strategies to improve the friendliness of distributed generation. This paper proposes the power allocation method of the hybrid energy storage system with battery and ultracapacitor in virtual synchronous generator,and analyzes the setting of key parameters. Finally,this paper analyzes the power allocation effect of the hybrid energy storage system on DC-side under the conditions of constant load,step mutation and continuous change through Matlab/Simulink simulation model,which verifies the feasibility and effectiveness of the proposed power allocation scheme.