高云鹏　陈婧　李林　滕召胜　柯盼盼

摘 要：通过建立多闪变源电路等效模型，分析了闪变功率闪变源判别原理，构建了改进能量算子提取电压和电流闪变包络，采用改进FFT谱分析获得闪变包络参数计算闪变功率，基于闪变功率方向和幅值特性实现闪变源定位及其污染评估，提出并建立了基于波动负荷功率分析的闪变源判别方法.仿真分析和实验表明，提出方法能快速有效定位闪变源，准确评估多闪变源的污染程度，判别结果快速准确、误判率低.

关键词：闪变源；闪变功率；改进能量算子；改进FFT；电能质量

中图分类号：TM835.4 文献标识码：A

Abstract： Through the establishment of multi-flicker sources circuit equivalent model， the theoretical background of tracing flicker sources by flicker power was analyzed. To accurately estimate flicker power， the flicker envelope parameters were obtained by using improved Teager-Kaiser energy operator and the improved FFT. The direction of flicker flow was determined by the sign of flicker power， and pollution assessment was achieved with the magnitude of flicker power. The simulation analysis and experiment results show that this approach can trace flicker sources effectively and rapidly and assess the pollution level of different flicker sources accurately. The tracing results are computed fast and correctly and the misdiagnosis rate is reduced.

Key words：flicker source；flicker power；improved energy operator；improved FFT；power quality

电压闪变是电能质量的重要参数，是导致电气设备故障与失效的重要原因[1].随着大功率波动负荷（如电弧炉、轧钢机等）的广泛应用，电网电压波动和闪变问题越来越严重.现有研究主要集中在电压闪变值的检测和计算方面，针对闪变源定位和闪变污染评估研究较少，而快速有效定位闪变源，明确闪变污染责任方，且在多闪变源情况下准确评估各闪变源污染程度，可为实现闪变问题针对性治理提供重要依据[2].

闪变源判别包括闪变源定位和闪变污染评估.针对闪变源的追踪和定位问题，Dan[3]提出基于电流的闪变分离法；文献[4]基于闪变能量在不同电压等级间的传递规律实现闪变源快速定位；文献[5]运用动态向量法建模，通过计算闪变传播系数定位闪变源；文献[6]提出母线电压和各支路电流的相关度系数法；……