特定次谐波滤除锁相在有源电力滤波器中的应用  

Application of specific harmonic filtering phase lock in APF

作　　者：黄海宏[1] 魏阳超 王海欣[1] 陈洋 HUANG Haihong;WEI Yangchao;WANG Haixin;CHEN Yang(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;State Grid Rizhao Power Supply Company,Rizhao 276826,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]国网日照供电公司,山东日照276826

出　　处：《电力自动化设备》2019年第12期36-40,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177037)~~

摘　　要：针对电网电压不平衡和网侧电压特定次谐波含量较高的情况,在传统的基于双二阶广义积分器的锁相环(DSOGI-PLL)前级加入谐波滤除级,可完全滤除特定次谐波,并且在电网电压不平衡的情况下,能准确检测网侧电压的频率和相位信息。将该锁相方法应用于有源电力滤波器(APF)中,提出了一种电流特定次谐波检测算法。该算法简化了计算,省去对滤波器的设计,能准确检测出电流特定次谐波。最后,通过仿真和实验验证了所提方法的正确性和有效性。Aiming at the condition of unbalanced grid voltage and high specific harmonic content of the grid voltage,a harmonic filtering stage is added in front of the traditional DSOGI-PLL(Dual Second-Order Generalized Integrator PLL),which can not only completely filter out the specific harmonics,but also accu?rately detect the frequency and phase information of the grid voltage in the case of unbalanced grid voltage.Applying the phase lock method in APF(Active Power Filter),a new specific current harmonic detec?tion method is proposed.The method simplifies the calculation,eliminates the design of the filter,and can accurately detect the harmonic current.Finally,the correctness and effectiveness of the proposed method are verified by simulation and experiment.

关 键 词：特定次谐波 锁相环 有源电力滤波器 双二阶广义积分器 谐波检测 谐波分析 

分 类 号：TN713[电子电信—电路与系统]