中国电机工程学报Issue(33)：5934-5940,7.DOI:10.13334/j.0258-8013.pcsee.2014.33.017
基于功率期望原理的汽轮发电机励磁绕组短路故障诊断
Field Winding Short Circuit Fault Diagnosis Within Turbine Generators Based on Power Expectation Principle
摘要
Abstract
In order to diagnose field winding short-circuit fault within turbine generators quickly and accurately, based on the expressions of turbine generator electromagnetic and reactive power, this paper analyzed the variation of generator operating points after a short-circuit fault. With the aid of proportional relationships between the no-load electromotive force and the excitation current, the electromagnetic power and reactive power calculation models were established when the field winding was normal, which were used for the calculation of their expectations, and the measured electromagnetic power and reactive power were compared with the expectations. When the deviation exceeds a certain value, the field winding short-circuit fault within the turbine generator is recognized, and the fault examples demonstrate the effectiveness of this method. The method is a non-invasive on-line monitoring method with high sensitivity. No matter the generator runs at lagging-phase, leading-phase or modulating-phase states, the field winding short-circuit fault can be effectively diagnosed.关键词
励磁绕组短路/空载电动势/电磁功率/无功功率/偏差/诊断Key words
short circuit of field windings/no-load electromotive force/electromagnetic power/reactive power/deviation/diagnosis分类
信息技术与安全科学引用本文复制引用
武玉才,李永刚..基于功率期望原理的汽轮发电机励磁绕组短路故障诊断[J].中国电机工程学报,2014,(33):5934-5940,7.基金项目
国家自然科学基金资助项目(51107039)；中央高校基本科研业务费专项资金资助。Project Supported by National Natural Science Foundation of China (51107039) （51107039）
The Fundamental Research Funds for the Central Universities （）
