基于光通量特征参数比对的IEC闪变仪适用性分析方法

摘要

There are some deficiencies of the IEC flickermeter used to detect flicker caused by interharmonic voltage. The effective frequency range of IEC flickermeter detection and the detection method of flicker caused by interharmonics are discussed. IEC flickermeter model and flux mathematical model are developed. The flux fluctuation frequency, flux fluctuation value and flicker value of amplitude modulation (AM) voltage and interharmonic can be obtained. The relationship between flux and flicker can be fitted on the basis of numerous data of AM voltage. The relationship is considered as a standard relationship, which is used to discuss the effective range of IEC flickermeter in regard to interharmonics. Furthermore a new approach, used to detect flicker caused by interharmonics, is presented.%传统IEC闪变仪在检测由间谐波引起的闪变的准确性上存在不足。针对IEC闪变仪的适用范围及间谐波引起的闪变算法进行了研究。通过搭建IEC闪变仪检测模型及光通量数学模型，测得调幅波和间谐波下的闪变测量值、光通量波动频率及波动值，对调幅波引起的闪变值和光通量数据进行多变量数据拟合，得到光通量与闪变之间的关系，并将其作为光通量与闪变之间的标准关系式。依据标准关系式探讨了IEC闪变仪在检测间谐波引起的闪变时的适用性，采用基于升-降采样及峰值检测相结合的方法，弥补了IEC闪变仪在检测由间谐波引起的闪变的不足。