基于半周期峰值采样的间谐波闪变算法_季宇.pdfVIP

第 35 卷 第 2 期 电 网 技 术 Vol. 35 No. 2 2011 年 2 月 Power System Technology Feb. 2011 文章编号：1000-3673（2011）02-0066-05 中图分类号：TM 76 文献标志码：A 学科代码：470·4051 基于半周期峰值采样的间谐波闪变算法 季宇，孙云莲，王黎，李晶，梁进祥 （武汉大学 电气工程学院，湖北省 武汉市 430072） Research of Voltage Flicker Caused by Interharmonics Based on Half-Cycle Peak Sequence JI Yu, SUN Yunlian, WANG Li, LI Jing, LIANG Jinxiang (School of Electrical Engineering, Wuhan University, Wuhan 430072, Hubei Province, China) ABSTRACT: With the utilization of lots of nonlinear loads, 关键词：电压闪变；间谐波；半周期峰值；数字滤波；插值； special attentions are paid to the voltage flicker caused by 荧光灯 interharmonics more and more. The characteristics of voltage 0 引言 flicker caused by interharmonics are analyzed in detail and it is pointed out that why the flicker meter recommended by IEC 电压闪变是指灯光照度不稳定对人眼造成的 cannot precisely detect the flicker caused by high-frequency 视感[1-2]。闪变的产生受到波动电压幅值、频率和波 interharmonics. To solve this problem, based on peak 形的影响，因此电压波动是闪变产生的根本原因。 samplings during half-cycle an algorithm for flicker caused by interharmonics is proposed. By means of theoretical derivation 一直以来交流电弧炉被作为最重要的闪变源，由于 and experimental simulation, it is demonstrated that the 其对电压产生明显的调制特性，学术界普遍使用调 frequency of half-cycle peak sampling is in conformity with the 幅波模型对其进行分析计算。国际电工组织标准中 signal fluctuation frequency caused by interharmonics. To 推荐的闪变测量仪也是基于该模型建立的。间谐波 perform digital filtering accurately, zerofill and interpolation 是频率非基波整数倍的干扰信号，由于其频率与基 are applied to sampled signals, and th