支持向量机与锁相环相结合的谐波检测方法  

Harmonic detection method combining support vector machine and phase⁃locked loop

作　　者：代玥 张新燕[1] 侯帅辉 邱汉强 DAI Yue;ZHANG Xinyan;HOU Shuaihui;QIU Hanqiang(School of Electrical Engineering,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830046

出　　处：《现代电子技术》2022年第21期171-175,共5页Modern Electronics Technique

基　　金：含大规模集中式风电场群的新疆电网中谐波耦合规律研究(51667018);自治区自然科学基金联合基金项目(2021D01C044)。

摘　　要：在光伏发电系统中,为了有效提升通过借助有源电力滤波器来实现实时性和精准性的检测谐波的能力,提出了一种支持向量机与锁相环相结合的谐波检测方法。应用支持向量机的计算方式得到基波电流幅值,锁相环输出的单位幅值为基波电流的数值,两者相乘为电网基波电流,网侧总电流减去基波电流,就能够直观得出谐波电流的准确数值。这种计算方法摒弃了传统i_(p)⁃i_(q)检测方法中使用到的低通滤波器,因此在计算结果的实时性以及精确性方面有了很大的提升。此外这种计算方式几乎没有工作延迟,所以对于实时性以及精确性的提升很有帮助。文中所涉及到的检测方式对于有源电力滤波器的检测最为适用,并且在此基础上做了仿真实验,对实时性以及精确性做了验证。In order to effectively improve the ability of real⁃time and accurate harmonic detection with the help of active power filter in the photovoltaic power generation system,a harmonic detection method based on the combination of support vector machine(SVM)and phase⁃locked loop(PLL)is proposed.The amplitude of the fundamental current is obtained by the calculation method of SVM,and the unit amplitude output by the PLL is the value of the fundamental current.The two are multiplied to obtain the fundamental current of the power grid.By subtracting the fundamental current from the total current on the grid side,the accurate value of harmonic current can be obtained intuitively.This calculation method abandons the low⁃pass filter used in the traditional i_(p)⁃i_(q) detection method,so it has a great improvement in the real⁃time performance and accuracy of the calculation results.In addition,this calculation method has almost no working delay,so it is very helpful to improve the real⁃time performance and accuracy.The proposed detection method is most suitable for the detection of active power filter.Simulation experiments were done on this basis.Therefore,its real⁃time performance and accuracy have been verified.

关 键 词：有源电力滤波器 锁相环 支持向量机 谐波电流 谐波检测 基波电流 低通滤波器 

分 类 号：TN713-34[电子电信—电路与系统] TM721[电气工程—电力系统及自动化]