一种无延时单相并网变换器dq电流解耦控制方法  

d-q Current Decoupling for Single-phase Grid-connected Converter Based on Non-delay

作　　者：杨达亮[1,2] 彭祖文 刘金宝 邵大帅 吴宁 YANG Daliang;PENG Zuwen;LIU Jinbao;SHAO Dashuai;WU Ning(Guangxi Key Laboratory of Power System Optimization and Energy Technology(Guangxi University),Nanning 530004,Guangxi Zhuang Autonomous Region,China;College of Electrical Engineering,Guangxi University,Nanning 530004,Guangxi Zhuang Autonomous Region,China;Electric Power Research Institute,Guangxi Power Grid Corporation,Nanning 530023,Guangxi Zhuang Autonomous Region,China)

机构地区：[1]广西电力系统最优化与节能技术重点实验室(广西大学),广西壮族自治区南宁市530004 [2]广西大学电气工程学院,广西壮族自治区南宁市530004 [3]广西电网有限责任公司电力科学研究院,广西壮族自治区南宁市530023

出　　处：《电网技术》2022年第4期1585-1593,共9页Power System Technology

基　　金：国家自然科学基金项目(61861003)。

摘　　要：以单相脉宽调制(pulse width modulation,PWM)变换器作为研究对象,以改善电流控制器的动态性能为目的,提出一种无延时控制方法。单相变换器传统矢量控制方法需要虚构正交电流分量,但传统正交信号发生器(orthogonal signal generator,OSG)在虚构出与单相电网电流正交的物理量时存在一定的延时,从而会恶化电流控制器的动态性能。针对虚构电流引起的延时问题,提出了一种无延时单相并网变换器电流控制方法。首先,建立了单相PWM变换器在dq旋转坐标系下的数学模型。其次,针对矢量控制在单相系统无法直接实现的问题,介绍了几种传统的OSG算法的原理。然后,提出一种无延时正交电流虚构算法,并给出了无延时正交电流虚构算法实现框图。最后,对所提的算法与传统的OSG算法进行仿真和实验对比分析,仿真和实验结果均验证了所提算法的有效性和可行性。In order to improve the dynamic performance of the current controller,this paper presents a non-delay control scheme for a single-phase pulse width modulation(PWM)converter.Most of the vector control methods for a single-phase converter require imaginary the orthogonal current components.However,there exist time delay issues in the generation of the fictitious orthogonal current components by the traditional orthogonal signal generator(OSG),which may deteriorate the dynamic performance of the current controller.In this paper,a fast OSG algorithm has been proposed to solve the relevant time delay problems.Firstly,the mathematical model of the single-phase PWM converter in the rotating dq coordinate system is established.Secondly,considering the problem that the vector control cannot be directly implemented in the single-phase system,several traditional OSG algorithms are introduced.Then a non-delay orthogonal current generation algorithm is proposed and its implementation block diagram is given.Finally,the proposed algorithm is compared with the traditional OSG algorithm by simulation and experiment.The simulation and experimental results verify the effectiveness and feasibility of the proposed algorithm.

关 键 词：单相脉宽调制变换器 动态性能 矢量控制 无延时正交电流虚构 电流解耦控制 

分 类 号：TM721[电气工程—电力系统及自动化]