摘要
针对微电网中惯性不足而引起的系统稳定性问题,提出了一种借鉴传统同步发电机控制机理的逆变器控制策略,即虚拟同步发电机(VSG)控制策略。该控制策略在提高微电网惯性的同时,使逆变器具有调频调压和功率控制的功能。文中研究设计了虚拟调速系统和虚拟励磁系统以及内部的电压电流控制环节,并在Digsilent环境下搭建了该系统模型,仿真分析结果验证了该控制策略的有效性。
Aiming at the stability of the system caused by inertia in microgrid,a new control strategy based on traditional synchronous generator control mechanism is proposed,that is virtual synchronous generator（VSG）control strategy.The control strategy can improve the micro grid inertia,which puts the inverter have the functions of frequency modulation,voltage regulation and power control.In this paper,the virtual speed regulating system and the virtual excitation system,as well as the internal voltage and current control are designed,and the system model is built under the Digsilent environment.And the results verify the validity of the VSG control strategy.
作者
李顺
李义海
LI Shun LI Yi-hai(College of Electrical Engineering ＆ New Energy, China Three Gorges University, Yichang 443002, China Shennongjia Power Supply Company, Shennongjia 442400 ,China)
出处
《通信电源技术》
2017年第4期13-15,25,共4页
Telecom Power Technology
关键词
分布式电源
虚拟同步发电机
虚拟调速器
虚拟励磁器
distributed inverter
virtual synchronous generator
virtual speed governor
virtual excitation controller
