发变组过激磁保护误动作原因分析与处理  

Analysis and Treatment of Malfunction of Over-excitation Protection of Generator and Transformer Units

作　　者：胡建华 Hu Jian-hua

机构地区：[1]国家能源集团科学技术研究有限公司银川分公司,宁夏石嘴山753000

出　　处：《电力系统装备》2022年第12期110-112,共3页Electric Power System Equipment

摘　　要：发电机或变压器过激磁运行时,导致铁芯发热,漏磁增加,电流波形畸变,严重时会损害发电机或变压器的安全。对于大容量机组,必须装置过激磁保护,整定值需要按照发电机或变压器过激磁能力较低的要求整定,当发电机与变压器之间设置断路器时,应分别为发电机和变压器配置过激磁保护。文章主要从发电机过激磁保护着手,对发电机过激磁保护动作的根本原因及其相关问题展开分析。When the generator or transformer is over-excited,it will cause the iron core to heat up,increase the magnetic flux leakage,and distort the current waveform,which will seriously damage the safety of the generator or transformer.For large-capacity units,over-excitation protection must be installed.The setting value needs to be set according to the requirement of low over-excitation capability of generator or transformer.When a circuit breaker is installed between generator and transformer,over-excitation should be configured for generator and transformer respectively.Protect.In this research,we mainly start from the over-excitation protection of generators,and explore the reasons for the malfunction of the protection as the research object.The root cause of generator overexcitation protection action and related problems are mainly analyzed.

关 键 词：发变组保护 过激磁 误动作 

分 类 号：TM623[电气工程—电力系统及自动化]