LC/CL/LCL滤波的电压源和电流源逆变器多环控制策略分析

Analysis of Multiloop Control Strategies for LC/CL/LCL-Filtered Voltage-Source and Current-Source Inverters

多环控制策略已被广泛应用于电压源和电流源的逆变器控制中,包括UPS和分布式发电。但是,对于特殊的应用,这些控制策略将被发展和评价,并作为独立的新发展。通过几个常见的系统,文章分析了用不同反馈变量的不同多环控制方法,强调了其相似性,证明了通用的优化变量选择法可用于大部分多环控制逆变系统。通过Matlab仿真和实验室的试验,不同逆变系统的时域波形图十分相似,验证了文中提出的优化变量选择方法的可行性。

Multiloop control strategies have commonly been used to control power inverters of both the voltage-source and currentsource topologies for power conversion applications including uninterruptible power supplies and utility interfaces for distributed power generation. However, these control strategies tend to be developed and comparatively evaluated for a particular application, with strategies for other applications presented as independent new developments, This paper presents a generalized analysis of different multiloop control approaches using alternative feedback control variables for several popularly adopted system configurations, highlighting similarities and identifying a generalized optimal control-variable selection criterion that is applicable across most multiloop-controlled inverter systems. The generality of the presented optimal variable selection criterion has been verified through the close similarities between the time-do-main waveforms of the different inverter systems simulated in MATLAB Simulink and implemented experimentally in the laboratory.