基于小波熵和概率神经网络的配电网电压暂降源识别方法A Method to Identify Voltage Sag Sources in Distribution Network Based on Wavelet Entropy and Probability Neural Network
贾勇;何正友;赵静;
摘要(Abstract):
分析了短路故障、感应电动机启动和变压器投运引起电压暂降的原理及各类电压暂降的特征,提出一种基于小波熵(wavelet entropy,WE)和概率神经网络(probability neural network,PNN)的电压暂降源识别方法。提取信号的小波能谱熵和小波系数熵特征向量,并将其输入概率神经网络,实现电压暂降源的自动识别。利用Matlab/Simulink建立简单配电网的仿真模型进行验证,结果表明,基于小波熵和概率神经网络的方法能很好地识别电压暂降源。
关键词(KeyWords): 电压暂降源;小波熵;概率神经网络;配电网
基金项目(Foundation):
作者(Author): 贾勇;何正友;赵静;
Email:
DOI:
参考文献(References):
- [1]易杨,张尧,钟庆.基于蒙特卡罗方法的大型电力用户电压暂降评估[J].电网技术,2008,32(6):57-60,75.Yi Yang,Zhang Yao,Zhong Qing.Assessment of voltage sags in large power consumer based on Monte Carlo method[J].Power System Technology,2008,32(6):57-60,75(in Chinese).
- [2]李妍,余欣梅,熊信艮,等.电力系统电压暂降分析计算方法综述[J].电网技术,2004,28(14):74-78.Li Yan,Yu Xinmei,Xiong Xinyin,et al.A survey on calculation and analysis methods of voltage sag[J].Power System Technology,2004,28(14):74-78(in Chinese).
- [3]赵凤展,杨仁刚.基于短时傅立叶变换的电压暂降扰动检测[J].中国电机工程学报,2007,27(10):28-34.Zhao Fengzhan,Yang Rengang.Voltage sag disturbance detection based on short time Fourier transform[J].Proceedings of the CSEE,2007,27(10):28-34(in Chinese).
- [4]王宾,潘贞存,徐丙垠.配电系统电压跌落问题的分析[J].电网技术,2004,28(2):56-59.Wang Bin,Pan Zhencun,Xu Bingyin.Analysis of voltage sags in distribution system[J].Power System Technology,2004,28(2):56-59(in Chinese).
- [5]张庆超,肖玉龙.一种改进的电压暂降检测方法[J].电工技术学报,2006,21(2):123-126.Zhang Qingchao,Xiao Yulong.An improved detection method of voltage sag[J].Transactions of China Electrotechnical Society,2006,21(2):123-126(in Chinese).
- [6]王宾,潘贞存,徐文远.配电网络电压跌落幅值估算分析[J].中国电机工程学报,2005,25(13):29-34.Wang Bin,Pan Zhencun,Xu Wenyuan.Voltage sags profile estimation for power distribution systems[J].Proceedings of the CSEE,2005,25(13):29-34(in Chinese).
- [7]王克星,宋政湘,陈德桂,等.基于小波变换的配电网电压暂降的干扰源识别[J].中国电机工程学报,2003,23(6):29-34.Wang Kexing,Song Zhengxiang,Chen Degui,et al.Interference source identification of voltage sag in distribution system based on wavelet transform[J].Proceedings of the CSEE,2003,23(6):29-34(in Chinese).
- [8]Gu Irene Y H,Nichlas E,Emmanouil S,et al.A statistical-based sequential method for fast online detection of fault-induced voltage dips[J].IEEE Trans on Power Delivery,2004,19(2):497-504.
- [9]杨洪耕,刘守亮,肖先勇,等.基于S变换的电压凹陷分类专家系统[J].中国电机工程学报,2007,27(1):98-104.Yang Honggeng,Liu Shouliang,Xiao Xianyong,et al.S-transform based expert system for classification of voltage dips[J].Proceedings of the CSEE,2007,27(1):98-104(in Chinese).
- [10]陈伟,郝晓弘,林洁.电压跌落扰动源的小波–神经网络识别方法[J].甘肃科学学报,2007,19(4):104-107.Chen Wei,Hao Xiaohong,Lin Jie.A method of voltage sag interference source identification in distribution system wavelet and neural network[J].Journal of Gansu Sciences,2007,19(4):104-107(in Chinese).
- [11]张文涛,王成山.基于小波熵的电容器扰动识别和定位[J].电力系统自动化,2007,31(7):71-74.Zhang Wentao,Wang Chengshan.Recognition and locating of wavelet entropy based capacitor switching disturbances[J].Automation of Electric Power Systems,2007,31(7):71-74(in Chinese).
- [12]赵慧元,张志丰,赵彩宏.一种新的电压凹陷检测及其补偿控制策略研究[J].电气应用,2007,26(6):95-98.Zhao Huiyuan,Zhang Zhifeng,Zhao Caihong.Research on a new method of voltage sag measure and voltage compensation strategies[J].Electrotechnical Application,2007,26(6):95-98(in Chinese).
- [13]肖湘宁,徐永海,刘连光.考虑相位跳变的电压凹陷动态补偿控制器的研究[J].中国电机工程学报,2002,22(1):64-69.Xiao Xiangning,Xu Yonghai,Liu Lianguang.Research on mitigation methods of voltage sag with phase-angle jump[J].Proceedings of the CSEE,2002,22(1):64-69(in Chinese).
- [14]李东敏,刘志刚,蔡军,等.基于多小波包系数熵和人工神经网络的输电线路故障类型识别方法[J].电网技术,2008,32(24):65-69.Li Dongmin,Liu Zhigang,Cai Jun,et al.Transmission lines fault recognition method based on multi-wavelet packet coefficient entropy and artificial neural network[J].Power System Technology,2008,32(24):65-69(in Chinese).
- [15]杨健维,罗国敏,何正友.基于小波熵权和支持向量机的高压输电线路故障分类方法[J].电网技术,2007,31(23):22-26,32.Yang Jianwei,Luo Guomin,He Zhengyou.High voltage transmission line fault classification based on entropy weight of wavelet and support vector machines[J].Power System Technology,2007,31(23):22-26,32(in Chinese).
- [16]Lemire D,Pharand C,Rajaonah J,et al.Wavelet time entropy,T wave morphology and myocardial ischemia[J].IEEE Trans on Biomedical Engineering,2000,47(7):967-970.
- [17]封洲燕.应用小波熵分析大鼠脑电信号的动态特性[J].生物物理学报,2002,18(3):348-351.Feng Zhouyan.Dynamic analysis of the rat EEG using wavelet entropy[J].Acta Biophysica Sinica,2002,18(3):348-351(in Chinese).
- [18]印欣运,何永勇,彭志科,等.小波熵及其在状态趋势分析中的应用[[J].振动工程学报,2005,17(2):165-169.Yin Xinyun,He Yongyong,Peng Zhike,et al.Study on wavelet entropy and its applications in trend analysis[J].Journal of Vibration Engineering,2005,17(2):165-169(in Chinese).
- [19]谢平,刘彬,王霄.多重分形熵及其在非平稳信号分析中的应用研究[J].仪器仪表学报,2005,26(8):610-612.Xie Ping,Liu Bin,Wang Xiao.Multifractal entropy and its application to analysis of non-stational signals[J].Chinese Journal of Scientific Instrument,2005,26(8):610-612(in Chinese).
- [20]何正友,刘志刚,钱清泉.小波熵理论及其在电力系统中应用的可行性探讨[J].电网技术,2004,28(21):17-21.He Zhengyou,Liu Zhigang,Qian Qingquan.Study on wavelet entropy theory and adaptability of its application in power system[J].Power System Technology,2004,28(21):17-21(in Chinese).
- [21]何正友,蔡玉梅,钱清泉.小波熵理论及其在电力系统故障检测中的应用研究[J].中国电机工程学报,2005,25(5):23-43.He Zhengyou,Cai Yumei,Qian Qingquan.A study of wavelet entropy theory and its application in electric power system fault detection[J].Proceedings of the CSEE,2005,25(5):23-43(in Chinese).
- [22]He Zhengyou,Xiaoqin Chen Y C.A study of algorithm and application in transient signals wavelet post-analysis methods[C].IEEE/PES Transmission and Distribution Conference Asia and Pacific,Dalian,China,2005.
- [23]李东辉,王波.基于小波熵的直流系统环网接地故障诊断[J].继电器,2006,34(5):10-13.Li Donghui,Wang Bo.Loop net grounding fault diagnosis of DC system based on wavelet entropy[J].Relay,2006,34(5):10-13(in Chinese).
- [24]孙晓刚,张建华,侯国莲,等.基于概率神经网络的凝汽器故障诊断研究[J].现代电力,2005,22(3):58-61.Sun Xiaogang,Zhang Jianhua,Hou Guolian,et al.Condenser fault diagnosis using probabilistic neural networks[J].Modern Electric Power,2005,22(3):58-61(in Chinese).
- [25]Gaing Z.Wavelet-based neural network for power disturbance recognition and classification[J].IEEE Trans on Power Delivery,2004,19(4):1560-1568.