摘要
指出传统的虚拟同步机硬件结构中,光伏发电设备与储能设备通常在直流侧连接后与逆变器相连,这种方案的控制较为复杂,缺少灵活性,不利于模块化的应用。提出一种新型的虚拟同步发电机硬件结构,并设计了基于电压或电流型控制的光伏逆变器控制策略和基于虚拟同步机思想的储能逆变器控制策略,系统整体体现虚拟同步机特性。仿真结果表明这种虚拟同步机控制策略可以有效抑制频率波动,加强微网稳定性,提升电能质量。
In the traditional hardware structure, photovoltaic generation equipment and energy storage device are integrated at DC- side and connected to the inverter, which is complicated to control, disadvantageous for modular applications and lacks flexibility.Therefore, this paper proposes a novel hardware structure of VSG, in the meantime designs the control strategy of photovoltaic inverter based on voltage- mode and current- mode control, and the control strategy of energy storage inverter based on VSG. The integral system presents the characteristics of VSG. The simulation results indicate that VSG control strategy could effectively suppress frequency oscillation, enhance micro- grid stability and improve power quality.
出处
《山西电力》
2016年第5期54-58,共5页
Shanxi Electric Power
关键词
微网
分布式发电
电能质量
虚拟同步发电机
并网逆变器
micro-grid
distributed generation
power quality
virtual synchronous generator
grid-connected inverter
