基于虚拟同步发电机的微网控制策略研究

Research on a Control Strategy in The Micro Grid

研究了虚拟同步发电机(VSG)控制策略在有冲击性负荷的微电网中的应用。微网中的冲击性负荷如电机类负载对微网稳定性造成了不利影响,且缩短了传统蓄电池的使用寿命。在此采用了适用于冲击性负荷的超级电容器储能和蓄电池储能的混合储能系统,提出了一种改进的VSG策略,利用其惯量下垂特性对冲击性负荷快速响应,通过对两台并联储能逆变器的负荷分配优化,大大提高了微网系统的稳定性与技术经济性。仿真和实验结果验证了所提微网控制策略的有效性。

The application of virtual synchronous generator control strategy for power control system is studied in the micro grid with impact load.Because of the impact load power in the micro grid,this has a great negative effect on the stability of micro grid and the service life of traditional battery.The hybrid energy storage system that suitable for micro grid with super capacitor energy storage and battery energy storage is puts forward.An improved virtual synchronous generator control strategy is proposed for optimization of impact load distribution in the inverters parallel system using its inertia droop characteristics.It is improved that the stability of micro grid and the technology economy of the energy storage.The simulation and experimental results verify the effectiveness of the proposed micro grid control strategy.