基于HHT与闪变功率流向法的闪变源定位识别  

Flicker Source Tracing Based on HHT and Flicker Power Flow Direction Method

作　　者：倪良华[1] 肖李俊 历馨 吕干云[1] NI Lianghua;XIAO Lijun;LI Xin;LU Ganyun(School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211167

出　　处：《电网与清洁能源》2018年第1期26-31,共6页Power System and Clean Energy

基　　金：国家自然科学基金项目(51577086);南京工程学院大学生科技创新基金项目(TB201717031)~~

摘　　要：针对传统闪变功率法仅能对电网公共连接点处的主导闪变源进行定位识别的问题,提出了一种基于HHT与闪变功率流向法相结合的闪变源定位识别新方法。应用HHT方法将检测到的闪变信号进行处理,得到由不同单一频率分量组合成的一组闪变包络信号,就闪变包络信号求取各闪变频率分量对应的闪变功率,根据闪变功率值的正负和大小,实现对各闪变源的定位识别及强度判断。对含单一频率分量和多频率分量闪变信号分别进行仿真研究。实验结果表明,所提出的方法可以对含单一频率分量和多频率分量闪变源进行准确定位。The conventional flicker source tracing, which is based on flicker power direction, can only identify the main flicker source. A new flicker power tracing method based on flicker power direction combined with HHT is proposed in this paper. When a flicker signal is processed by HHT algorithm, a set of flicker enveloping signals containing a single frequency component will be obtained, and the flicker power of each fre- quency component is determined. According to the sign and val- ue of the flicker power, the location and intensity of the flicker source are identified. The simulation experiment are carried out for the single component flicker signal and multi- components flicker signal using the flicker power direction with HHT meth- od. And the research result shows that the presented method can identify the signal component flicker source and multi- compo- nents flicker source accurately.

关 键 词：HHT 闪变源 闪变功率流向法 定位 

分 类 号：TM743[电气工程—电力系统及自动化]