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新型发电机100%定子单相接地保护方案
引用本文:邰能灵,侯志俭,尹项根,陈德树. 新型发电机100%定子单相接地保护方案[J]. 电力系统自动化, 2002, 26(3): 41-44,51
作者姓名:邰能灵  侯志俭  尹项根  陈德树
作者单位:1. 上海交通大学电力学院,上海市,200030
2. 华中科技大学电力系,湖北省,武汉市,430074
基金项目:国家自然科学基金 (5 0 10 70 0 7)
摘    要:提出了基于B样条半正交小波的新型发电机定子单相接地保护方案。通过直接对机端和中性点两侧的测量电压进行小波变换,无需对测量电压中基波零序和三次谐波零序电压进行算法分离,利用其合成量的小波分析结果,可靠识别出发电机定子接地故障。由于综合利用了故障电压的突变奇异性,新方案能保护100%范围的定子绕组,灵敏度也大大提高。仿真研究和动模试验均表明,该方案在各种运行方式(包括强励)下均能取得很好的保护性能。

关 键 词:半正交小波;定子接地故障;零序电压
收稿时间:1900-01-01
修稿时间:1900-01-01

A New 100% Generator Stator Ground Fault Protection Scheme Based on the Semi-orthogonal Wavelet
Tai N engling,H ou Zhijian,Yin X ianggen,Chen Deshu. A New 100% Generator Stator Ground Fault Protection Scheme Based on the Semi-orthogonal Wavelet[J]. Automation of Electric Power Systems, 2002, 26(3): 41-44,51
Authors:Tai N engling  H ou Zhijian  Yin X ianggen  Chen Deshu
Affiliation:Tai N engling1,H ou Zhijian1,Yin X ianggen2,Chen Deshu2 1.Shanghai Jiaotong University,Shanghai2 0 0 0 30,China 2 .Huazhong U niversity of Science and Technology,Wuhan430 0 74,China
Abstract:This paper presents a new 10 0 % coverage protection scheme based on the semi- orthogonal wavelet for the generator stator ground fault.Different from the traditional protection schemes,which discompose the zero sequence fundam ental voltages and the zero sequence third- harm onic voltages from the measured zero sequence voltage at the neutral and the terminals,the proposed approach detects the ground fault by directly analyzing the m easured voltage.As both of singularities of the zero sequence fundamental voltages and the zero sequence third- harm onic voltages are used in this scheme, it can protect the 10 0 % coverage generator windings.Simulation and experim ental results have shown that,under different operation conditions,the new scheme can obtain the high sensitivity and reliability that the great generators require.
Keywords:sem i- orthogonal wavelet  stator ground fault  zero sequence voltage
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