【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。更多还原

【Abstract】 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.更多还原