基于改进SOGI-PLL的电压同步信号检测技术  

Voltage Synchronization Signal Detection Technology Based On Improved SOGI-PLL

作　　者：李卫国[1] 刘宏伟 刘新宇 陈立铭 郭丽军 Li Weiguo;Liu Hongwei;Liu Xinyu;Chen Liming;Guo Lijun(Electrical Engineering College,Northeast Electric Power University,Jilin Jilin 132012;State Grid Jilin Electric Power Company,Changchun Jilin 130000;China Electrotechnical Society,Beijing 100055)

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]国网吉林电力有限公司,吉林长春130000 [3]中国电工技术学会,北京100055

出　　处：《东北电力大学学报》2021年第3期93-100,共8页Journal of Northeast Electric Power University

基　　金：国家自然科学基金(51877035)。

摘　　要：针对存在直流量、谐波畸变、不对称等情况对电网电压同步信号检测的干扰问题,文中分析了传统SOGI-PLL的结构原理,并在原结构具有一定抗不对称干扰能力的基础上优化SOGI结构,在原有正交发生模块加入求差节点,消除直流偏置影响,并构建了前置次谐波级联模块滤除干扰程度较大的特定次谐波,增强了系统在复杂电网情况下锁相稳定性.最后通过Matlab/Simulink在电压检测信息进行多种干扰量的综合仿真研究,结果表明改进SOGI-PLL结构在电压同步信号干扰较多时仍有很好的检测性能.In order to solve the interference problem of synchronous signal detection of grid voltage due to the factors of straight flow,harmonic distortion,asymmetry,etc.,the structural principle of traditional SOGI-PLL is analyzed,and based on the original structure has some anti asymmetric interference ability,the sogi structure is optimized,the differential nodes are added at the original orthogonal occurrence blocks,the DC bias effect is e-liminated,the pre-harmonic cascade module is constructed to filter out specific sub-harmonics with a large de-gree of interference,which enhances the system’s phase-lock stability under complex power grid conditions.Finally,the comprehensive simulation study of multiple interfering quantities by Matlab/Simulink in voltage de-tection information shows that the improved SOGI-PLL structure still has a good detection performance when the voltage synchronization signal has more interference.

关 键 词：SOGI 锁相环技术 谐波畸变 直流量干扰 

分 类 号：TM464[电气工程—电器]