基于小波启动的故障分量相角比差发电机定子接地保护  

A NEW PHASE-ANGLE DIFFERENTIAL PROTECTION FOR GENERATOR STATOR GROUND FAULT WITH WAVELET TRANSFORM START-UP COMPONENT

作　　者：邰能灵[1] 邓妍[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200030

出　　处：《电力系统自动化》2004年第13期60-63,共4页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50107007)

摘　　要：分析了发电机发生定子接地故障后,机端和中性点侧三次谐波电压相角变换的特性。在此基础上,提出基于小波启动的故障分量相角差动定子接地保护新方案,并研制出相应的保护模块。理论分析及实验研究均表明,该方案适用于各种接地方式的发电机,具有更高的灵敏度和可靠性。This paper analyzes the characteristic of the third-harmonic voltages at the generator neutral and the terminals under different operation conditions. According to that, a new 100% coverage protection scheme based on phase-angle differential of the fault contributed third-harmonic voltage at the terminals and the neutral is presented, and the fault initialized by a wavelet transform start-up component. The corresponding protection equipment is also introduced. Both simulation and experimental results show that the new approach can obtain the high sensitivity and reliability the great generator required.

关 键 词：定子接地保护 三次谐波零序电压 小波分析 故障分量 

分 类 号：TM307[电气工程—电机]