摘要
虚拟同步发电机(Virtual Synchronous Generator,VSG)控制策略能使逆变器模拟同步发电机运行机制,有利于改善系统稳定性,已成为逆变器控制技术的热点问题之一。首先对VSG的结构进行详细的分析,包括电压电流双环的解耦控制、有功功率和无功功率的下垂控制以及同步发电机的建模等。然后在此基础上提出了一种基于Washout滤波器特性的新型VSC控制方案。最后通过Matlab仿真结果验证了所提的VSG控制方法的有效性和可行性,并说明了新的控制方案可以改善微电网系统的频率与电压,提高微电网的适应性和电能质量。
The virtual synchronous generator （VSG） control strategy can make the inverter simulate the operation mechanism of synchronous generator, which is beneficial to improve the system stability, it has become one of hot issues of inverter control technology. First, the structure of VSG is analyzed in detail, including the decoupling control of voltage loop and current loop, the droop control of active power and reactive power, and the modeling of synchronous generator, etc. Then, a new VSC control scheme with Washout filter characteristics is proposed. Finally, the simulation results on Matlab verify that the proposed VSG control method is effective and feasible, the new control scheme can improve the frequency and the voltage of microgrid system, and increase the adaptability and the power quality of microgrid.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2017年第16期51-57,共7页
Power System Protection and Control
基金
国家自然科学基金(61304134)
上海市重点科技攻关计划(14110500700)
上海市电站自动化技术重点实验室(13DZ2273800)~~
