QFSN型发电机组注入式定子接地保护试验研究  

Study on Grounding Protection Test for Injection Type Stators of QFSN Generator Sets

作　　者：崔超 朱挺进 邹兵 Cui Chao;Zhu Tingjin;Zou Bing(Huaneng Yingkou Co-generation Co.,Ltd.,Yingkou Liaoning 115000,China)

机构地区：[1]华能营口热电有限责任公司

出　　处：《电气自动化》2019年第5期35-37,共3页Electrical Automation

摘　　要：发电机定子接地是一种较为常见的接地故障,对发电机组的危害较大。根据注入式定子接地保护的工作原理及发电机组保护要求,对静止状态下的相角、阻抗和电阻折算系数等保护值进行了校正整定试验。对正常运行状态下距中性点15%处和30%处接地故障进行了试验。试验结果表明了保护整定值的准确性和保护装置动作的可靠性,具有定子接地(100%)保护性能,提高了发电机组的安全运行。Generator stator grounding,a common grounding fault,might cause serious harm to the generator set.According to the working principle of injection stator grounding protection as well as the protection requirement of the generator,calibration tests were made on the phase angle,impedance,resistance conversion factor and other protection values in the idle state.Moreover,grounding faults happening at 15%and 30%distance from the neutral point were tested in the normal operational state.Test results indicated the accuracy of the protection calibration value as well as the reliability of the action of the protection device.The appliance could achieve stator grounding(100%)protection and improve save operation of the generator set.

关 键 词：QFSN型发电机组 注入式 定子接地保护 接地变压器 校正试验 

分 类 号：TM31[电气工程—电机]