摘要
荧光灯和发光二极管(LED)灯目前已大规模使用,但是按国际电工委员会(IEC)标准制造的闪变仪存在无法检测出由间谐波引起的闪变的缺陷。为了弥补这一缺陷,考虑到正弦信号采样波形的显示用正弦内插的方法更能接近原始信号,文中详细分析了基于正弦插值的闪变测量方法。针对正弦插值可能会引起闪变错误评估的问题,分析了正弦插值的误差来源,提出了将正弦插值前减去常数项的基于改进正弦插值的闪变测量方法。改进后的测量方法不仅能测量由低频段间谐波引起的闪变,也能检测出由高频段间谐波引起的闪变,对进一步研究闪变测量方法起到了促进作用。
With the reduction of the number of incandescent lamps together with the large-scale usage of fluorescent and light emitting diode（LED）lights at the same time,the deficiency of International Electrotechnical Commission（IEC）flickermeter that can not measure interharmonic-caused voltage flickers has become increasingly apparent.It is known that the display of measured sinusoidal waveforms is closer to the original signal if sine interpolation method is used.Clearly,the sine interpolation method is able to overcome the deficiencies associated with the IEC flickermeter.The principle of sine interpolation is analyzed in detail and it is found that the sine interpolation may lead to a wrong assessment on the flicker.The source of error in sine interpolation is analyzed and a new approach is proposed.This new approach deducts a constant before using the sine interpolation method to measure voltage flickers.The new approach can measure voltage flickers caused by both low-frequency and high-frequency interharmonics.The new approach promotes further study on flicker measuring algorithms.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第18期62-66,共5页
Automation of Electric Power Systems
基金
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709204)
