电网技术2017，Vol.41Issue(8)：2680-2687,8.DOI:10.13335/j.1000-3673.pst.2016.3224
基于改进虚拟同步发电机算法的微网逆变器二次调频方案
Secondary Frequency Regulation for Microgrid Inverters Based on Improving Virtual Synchronous Generator
摘要
Abstract
Traditional virtual synchronous generator control scheme can help inverters to realize primary frequency regulation and provide frequency support for microgrid. However, steady-state error exists by using this method. With improved control structure of virtual synchronous generator, function of secondary frequency regulation for island mode can be obtained to stabilize microgrid frequency. System stability is discussed through small signal equivalent analysis and root-locus method, and selection range of related parameters is confirmed. Simultaneously, active power sharing according to inverter capacity can be implemented by changing related parameters. It helps several inverters to participate in secondary frequency regulation together, conducive to extend total capacity of frequency regulation and microgrid. Furthermore, the proposed secondary frequency regulation can assist implementation of pre-synchronization function. Simulation results verify effectiveness of the proposed method.关键词
微电网/虚拟同步发电机/小信号等效/二次调频/预同步控制Key words
microgrid/virtual synchronous generator/small signal equivalent analysis/secondary frequency regulation/pre-synchronization control分类
信息技术与安全科学引用本文复制引用
李斌,周林,余希瑞,郑晨,刘晋宏..基于改进虚拟同步发电机算法的微网逆变器二次调频方案[J].电网技术,2017,41(8):2680-2687,8.基金项目
国家自然科学基金(51477021).Project Supported by National Natural Science Foundation of China (51477021). （51477021）
