基于虚拟阻尼补偿的改进型VSG控制策略研究

Research on Improved VSG Control Strategy Based on Virtual Damping Compensation

虚拟同步发电机(VSG)控制不仅可更好地支撑微网的频率,还可实现多逆变器的并联组网运行,改善微网的运行性能。为更好地模拟传统同步发电机的特性,针对VSG动态过渡过程中的功率振荡,提出了一种改进型VSG控制策略,在传统VSG控制的基础上,通过引入补偿环节和可调参数,降低系统的阶数,既保证了系统的动态响应速度,又避免了动态的功率振荡,有效提高了VSG的控制性能。仿真及实验结果证明了所提控制策略的正确性和有效性。

Virtual synchronous generator（VSG） not only can support the frequency of micro-grid better but also can realize the parallel operation of inverters.In order to simulate the characteristics of traditional synchronous generator better and suppress the dynamic power oscillation during the transition process, an improved VSG control strategy for micro-grid inverters is proposed,Compensation section and adjustable parameter are introduced to reduce the order of the system based on the traditional VSG so as to guarantee the response of the system and avoid the dynamic power oscillation to improve the performance of VSG.The simulation and experimental results verify the effectiveness of the proposed control strategy.