光伏逆变电源可变虚拟惯量控制策略的研究  

CONTROL STRATEGY RESEARCH OF PV INVERTER WITH VARIABLE VIRTUAL INERTIA

作　　者：祝龙记[1] 王丹[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,淮南232001

出　　处：《太阳能学报》2016年第4期823-828,共6页Acta Energiae Solaris Sinica

基　　金：安徽省教育厅重点科研项目(KJ2013A084)

摘　　要：孤岛模式下频率的稳定对光伏逆变电源的正常运行至关重要,为了实现在孤岛模式下输出电能频率的稳定,该文采用虚拟同步发电机(VSG)思想设计VSG的功频控制器,考虑当频率发生变化时VSG功频控制器调整较慢的问题,提出一种可变虚拟惯量的控制策略,通过实时选择不同的虚拟惯量值来实现快速平抑频率波动。实验结果表明该方法可更快速地实现功率跟踪和频率稳定。The frequency stability is very important to the normal operation of the PV inverters in island mode. In order to realize the stable frequency of output power in island mode, a power frequency controller is designed on the basis of the thought of virtual synchronous generator （VSG）. Because the VSG power frequency controller adjusts slowly when the frequency changes, a variable virtual inertia control strategy is proposed, which smooth frequency fluctuations rapidly through choosing different virtual inertia value real-time. The simulation results show that it can realize power tracking more quickly, and realize frequency stability rapidly.

关 键 词：光伏逆变电源 可变虚拟惯量 频率稳定 虚拟同步发电机 

分 类 号：TM614[电气工程—电力系统及自动化] TM464