基于改进空间矢量脉宽调制的电压源型换流器偶次谐波抑制  

Even-order Harmonic Suppression for Voltage Source Converters Based on Improved Space Vector PWM Method

作　　者：赵紫龙[1] 周敏[1] 瞿兴鸿[2] 胡朝燕[1] 

机构地区：[1]中国电力科学研究院(南京),江苏省南京市210003 [2]国电南瑞科技股份有限公司,江苏省南京市210061

出　　处：《电力系统自动化》2013年第8期112-116,122,共6页Automation of Electric Power Systems

摘　　要：分析了经典空间矢量脉宽调制(SVPWM)算法产生偶次谐波的机理,以及抑制偶次谐波的改进原理。从分扇区使用不同矢量序列的角度出发,提出多种抑制偶次谐波的改进实施方法。建立了仿真模型,对不同改进方法下的SVPWM仿真波形进行傅里叶分析,比较谐波含量,并借助250kW光伏逆变器平台开展各方法的实验验证,用具有傅里叶分析功能的示波器记录实验结果。通过仿真和实验证明了所提方法的有效性,并从实现难度、损耗大小和实施效果角度与常规偶次谐波抑制方法进行了比较,说明所提方法的优越性。The production principle of even-order harmonics in normal space vector pulse width modulation（SVPWM） algorithm and the principles to improve even-order harmonic suppression are analyzed.On the basis of different vector sequences used in different space sectors,several improving methods for even-order harmonic suppression are proposed.Simulation models are established,and harmonic contents of different SVPWM waves are compared by Fourier analysis.Experimental results are based on a 250 kW photovoltaic inverter plant and recorded by an oscilloscope with fast Fourier transform analysis function.Simulation results and experiment results are given to verify the effectiveness of the proposed methods.The advantages of proposed methods are shown by comparison with conventional improved methods on complexity,losses and effectiveness.

关 键 词：空间矢量脉宽调制 偶次谐波 谐波抑制 电压源型换流器 开关序列分布 

分 类 号：TM46[电气工程—电器]