双馈风力发电系统网侧变流器多电流环控制  

Multi Current Loop Control of Grid Side Converter in Doubly Fed Wind Power Generation System

作　　者：严锋 周小勇 曹鑫楠 YAN Feng;ZHOU Xiao-yong;CAO Xin-nan(Nantong Branch of Jiangsu State Grid Corporation,Nantong 226000,China)

机构地区：[1]国网江苏省电力有限公司南通供电分公司,江苏南通226000

出　　处：《电力电子技术》2022年第12期59-63,共5页Power Electronics

基　　金：2019年国家电网有限公司指南科技项目(5400-201955454A-0-0-00)。

摘　　要：非理想电网电压不平衡和畸变会严重影响双馈风力发电系统网侧变流器(GSC)的电流质量,这里构建多电流控制环路,以解决GSC电流的不对称和谐波问题。首先将电流基波正负序分量和低次谐波正负序分量在对应的旋转坐标系下变为直流量,利用比例积分(PI)控制器建立多电流控制环路,实现对网侧电流的无差调节。其次,在静止坐标系下建立电流控制环路统一数学模型,并在此基础上分析环路控制器的设计方法。最后通过10 kW的GSC平台,验证所提控制策略的正确性。The unbalance and distortion of nonideal grid voltage will seriously affect the current quality of grid side converter(GSC) in doubly fed wind power generation system.Multi current control loop scheme is used to solve the current asymmetry and harmonic problem of GSC.Firstly,the positive and the negative sequence component of current fundamental and low-order harmonic are regarded as direct flow in the corresponding rotating coordinate system.The proportional integral(PI) controller is used to construct multi current control loop to realize the error free regulation of network side current.Secondly,a unified mathematical model of current control loop is established in static coordinate system.And then,the design method of loop controller is analyzed.Finally,the correctness of the proposed control strategy is verified by a 10 kW GSC platform.

关 键 词：网侧变流器 双馈风力发电 比例积分控制器 无差调节 

分 类 号：TM46[电气工程—电器]