单相光伏并网逆变器电流控制方法研究及分析  

Research and Analysis on Current Control Methods of a Single-Phase Grid-Connected Inverters for Photovoltaic Modules

作　　者：秦睿[1] 甄文喜[1] 陈一悰 马喜平[1] 杨俊[1] 魏博[1] 

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州730050 [2]国网陕西省电力公司电力科学研究院,陕西西安710054

出　　处：《中国电力》2016年第8期87-92,共6页Electric Power

基　　金：甘肃省电力公司科研资助项目(5227221350BR)~~

摘　　要：针对并网逆变器的电流控制方法进行了分析研究,通过分析,采用了一种带电网电压前馈和准PR控制的双电流环控制方法,并就其关键的比例谐振控制(PR)进行了理论分析和参数设计。为分析该方法对抑制谐波,改善电能质量的作用,建立了并网逆变器控制系统仿真模型,并通过仿真试验,分别研究了在电网正常、电网电压突变、电网含低次谐波3种情况下比例积分(PI)控制和PR控制方法的控制效果,对于研制单相光伏并网逆变器控制系统具有一定参考价值。The basic current control methods of a single-phase grid-connected inverter for photovoltaic modules are studied, and an inverter control strategy of dual close loop with proportional resonant （PR） controller and grid voltage fed forward is presented in this paper. Based on a theoretical analysis of the PR controller, the parameters are designed. In order to study the effect of the control method for improving the output power quality, a simulation model of the grid-connected inverter control system is established, and the PI control and PR control method are respectively analyzed under three scenarios including grid with nominal voltage, grid with voltage mutation and grid containing low harmonics. The result of this study is significant for developing the control system of single-phase grid-connected inverters.

关 键 词：并网逆变器控制 比例谐振控制 滞环控制 比例积分(PI)控制 

分 类 号：TM464[电气工程—电器] TM615