徐湘楚,朱凌,郭本峰.基于虚拟同步发电机的逆变电源控制策略研究[J].电测与仪表,2015,52(2):. XU Xiangchu,ZHU Ling,GUO Benfeng.Research on Control Strategies of Inverters Based on Virtual Synchronous Generator[J].Electrical Measurement & Instrumentation,2015,52(2):.
基于虚拟同步发电机的逆变电源控制策略研究
Research on Control Strategies of Inverters Based on Virtual Synchronous Generator
In view of the conventional droop control method of inverter existing voltage and frequency offset in the steady state, cannot fully meet the requirements of the grid operation, a new control strategy of inverters called virtual synchronous generator(VSG) is adopted. A virtual synchronous generator model is established, focusing on the design of the power frequency controller and excitation controller based on synchronous generator control theory. An inverter grid-connected system which uses a large capacity steam turbine generator to simulate grid is built. The role of the rotational inertia and the grid-connected regulation characteristics of virtual synchronous generator are verified through Matlab / Simulink simulation. The results show that, the inverter based on virtual synchronous generator control strategy is approximately equivalent to a synchronous generator in external characteristics, has advantages in modulating frequency and voltage and is conductive to grid operation.
