摘要
微电网孤岛模式下,当逆变器输出功率变化时,下垂控制的逆变器存在频率突变和偏移的问题。文章采用虚拟同步发电机(VSG)控制策略,使微电网逆变器接口具有下垂特性,同时,引入转动惯量和阻尼的调节来改善功率变化时频率突变和偏移的问题,提高系统的稳定性。文章设计了VSG的控制模块,仿真结果验证了控制策略的有效性。
When the output power is changed, the droop control inverter has the problem of frequency mutation and migration. The virtual synchronous generator（VSG） control strategy in the micro grid inverter interface has the droop characteristics at the same time, through the introduction of the moment of inertia and damping adjustment can improve the problems of frequency mutation and migration, enhance the stability of the transient response. In this paper,the equivalent relation between the VSG control strategy and the traditional synchronous generator is established. Secondly, according to the mathematical model of synchronous generator governor,the control module of VSG is designed. Finally, the differences between the traditional droop control and the VSG control strategy are analyzed. The effectiveness of the control strategy is verified by simulation results.
出处
《可再生能源》
CAS
北大核心
2018年第2期241-246,共6页
Renewable Energy Resources
基金
中国工程院咨询项目(2012-ZD-16)
