单相PWM整流器高电能质量控制研究  

Research on High Power Quality Control of Single-phase PWM Rectifier

作　　者：李贵良 罗新元 唐标 程富勇 LI Gui-liang;LUO Xin-yuan;TANG Biao;CHENG Fu-yong(Yunnan Power Grid Co.,Ltd.,Kunming 678400,China)

机构地区：[1]云南电网有限责任公司,云南商昆明678400

出　　处：《电力电子技术》2023年第6期1-5,共5页Power Electronics

基　　金：云南电网有限责任公司科技项目(051300KK52180006)。

摘　　要：传统单相脉宽调制(PWM)整流器存在控制精度差、动态响应慢等缺点。此处提出通过n倍采样周期微分算法构造正交分量,并在d,q坐标系下构建单相PWM整流器双环控制策略。首先,基于n倍采样周期,用后向差分实现微分算法,来构造电网电流的正交分量,在旋转坐标系下用复矢量比例积分(CVPI)控制器建立PWM整流器的网侧电流控制环路,分析了电流控制环路CVPI控制器的参数设计,详细讨论了电压控制环路的设计方法;其次,为了解决含低次背景谐波下非理想电网电压的电流质量问题,详细讨论了电网电压前馈的方法,并提出了改进的电网电压前馈策略;最后,通过5 kW的单相PWM整流器样机平台进行了试验验证,试验结果证明了所提控制策略的正确性。The traditional single-phase pulse width modulation(PWM)rectifier has some disadvantages,such as poor control accuracy and slow dynamic response.The n-times sampling period differential algorithm is proposed to con-struct the orthogonal component,and the double loop control strategy of single-phase PWM rectifier is constructed in d,q coordinate system.Firstly,based on the n-times of sampling period,the orthogonal component of grid curent is constructed by backward differential algorithm,the grid side current control loop of PWM rectifier is constructed by using complex vector proportional integral(CVPI)controller in the rotating coordinate system,the parameter design of the current control loop CVPI controller is analyzed,the design method of the voltage control loop is analyzed in de-tail.Secondly,the method of grid voltage feedforward is pointed out to solve the current quality problem of non-ideal grid voltage with low-order background harmonics,the improved grid voltage feedforward strategy is described.At last,the test verification is carried out through a 5 kW single-phase PWM rectifier prototype platform,the test results prove the correctness of the proposed control strategy.

关 键 词：整流器 正交分量 复矢量 

分 类 号：TM461[电气工程—电器]