分布式逆变器并联运行系统的简化控制策略  

Simplified Control Strategy of Parallel Operation for Distributed Inverters System

作　　者：马临超 齐山成 刘毅 MA Linchao;QI Shancheng;LIU Yi(School of Electrical Engineering and Automation,Henan Institute of Technology,Xinxiang 453003,Henan,China)

机构地区：[1]河南工学院电气工程与自动化学院,河南新乡453003

出　　处：《电网与清洁能源》2022年第3期129-138,共10页Power System and Clean Energy

基　　金：河南省重点研发与推广专项项目(192102210144)。

摘　　要：围绕微电网中分布式单相逆变器并联运行系统的控制问题,设计了一种考虑逆变器滤波电容电压和并网电流信息不可用时的简化控制策略,可有效提高系统可靠性。对于电压信息缺失,控制器利用内部估算的电压参考和逆变器侧电感电流测量值计算有功和无功功率,进而可使用频率和电压下垂特性,无需互连线。逆变器在参考电压幅值和频率下的运行是通过直接控制调制波来实现的,故缓解了由于缺少某些电压和电流信息而导致无法实现闭环的情况。利用所搭建的测试平台进行了实验,实验结果验证了所设计分布式逆变器并联运行系统的简化控制器配置的有效性。Focusing on the control problem of the parallel operation for distributed single-phase inverters system in microgrid,a simplified control strategy that considers the unavailability of the filter capacitor voltage and grid-connected current information of the inverter is designed,which can effectively improve the reliability of the system.For the lack of voltage information,the controller uses the internally estimated voltage reference and the measured value of the inverter-side inductor current to calculate the active and reactive power,and then the frequency and voltage droop characteristics can be used without interconnecting wires.The inverter’s operation at the reference voltage amplitude and frequency is achieved by directly controlling the modulating wave,so that it alleviates the inability to achieve a closed loop by the lack of certain voltage and current information.Experiments were carried out with the built test platform,and the experimental results have verified the effectiveness of the simplified controller configuration for parallel operation of the distributed inverters system.

关 键 词：微电网 逆变器 并联运行 下垂控制 虚拟电感 

分 类 号：TM464[电气工程—电器]