一种混合调制模式的光伏并网调制策略研究  

Research on Hybrid Modulation Pattern of PV Grid-Connection

作　　者：张剑[1] 欧阳陵江[2] 尹韶辉[3] ZHANG Jian;OUYANG Ling-jiang;YIN Shao-hui(Department of Mechanical Engineering,Hunan Network Engineering Vocational College,Changsha 410004,China;College of Mechanical Engineering,Hunan Industry Polytechnic,Changsha 410208,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410012,China)

机构地区：[1]湖南网络工程职业学院机械工程系,长沙410004 [2]湖南工业职业技术学院机械工程学院,长沙410208 [3]湖南大学机械与运载工程学院,长沙410012

出　　处：《控制工程》2018年第9期1638-1642,共5页Control Engineering of China

基　　金：湖南省教育厅科学研究课题(12C1031)

摘　　要：针对无功控制的电路会出现电流过零点畸变的问题,以及开关过程中实际损耗非常大等问题,提出一种光伏并网逆变器有源滤波器的混合调制模式。文中综合性的对比单极和双极调制模式的特性,包括开关动作、谐波电流和实际效率等方面的因素,研究和设计结合两种方式的混合调制模式,实现过零点的平滑过渡。将3 k W单相非隔离型光伏并网逆变器作为研究和实验的平台,检验所提调制模式的并网电流情况。实验结果显示所提模式综合了单极双极的优势,在光伏并网系统有很好的适用性。For the problems of current zero crossing distortion appeared in the reactive power control circuit and the actual loss is very big in switching process, this paper proposes a hybrid photovoltaic grid inverter modulation mode active filter. The text takes a feature comparison of unipolar and bipolar modulation mode comprehensively, including the switching factor, harmonic current and the actual terms of efficiency, studies and designs a hybrid modulation mode combining the above two methods, to achieve a smooth transition through zero. Here takes a 3 k W non-isolated single phase photovoltaic inverter as a platform for research and experimentation, testing the proposed modulation mode＇s grid-connection situation. Experimental results show that the proposed model combines the advantages of unipolar and bipolar modulation mode, and has good applicability in the photovoltaic grid-connected system.

关 键 词：零点畸变 单极性调制 双极性调制 混合调制 光伏并网 

分 类 号：TM615[电气工程—电力系统及自动化]