光伏并网发电系统中的谐波测量及分析  

Harmonics detecting and analyzing of PV grid connected generation systems

作　　者：罗维平[1] 吴雨川[1] 薛勇[1] 

机构地区：[1]武汉科技学院电信学院,湖北武汉430073

出　　处：《中国电力》2009年第12期11-14,共4页Electric Power

基　　金：湖北省教育厅科学技术研究计划资助项目(D20081705)

摘　　要：介绍光伏并网发电系统的谐波测量方法,用锁相环电路实现对电网谐波信号的硬件同步采样,从根本上消除了因采样不同步造成的误差。采用基于4项B-H窗的加窗插值FFT(快速傅立叶变换)算法分析光伏系统谐波,有效地减小了频谱泄漏和栅栏效应造成的误差,提高了数据处理的准确性。Harmonics detecting method of a PV grid connected generation system was introduced, and harmonics synchronous-sampling technique was realized by PLL circuit of hardware, which could eliminate the errors of non-synchronous-sampling radically. FFT algorithm based on B-H window function and interpolation was used to analyze the harmonics of a PV system, and the errors caused by frequency table giveaway and barrier domino effect were decreased effectively. Veracity of data processing was advanced.

关 键 词：光伏并网发电 谐波检测 有源电力滤波器 加窗插值算法 

分 类 号：TM615[电气工程—电力系统及自动化] TM935.1