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发电机差动保护误动作分析
Analysis on False-Actions of Differential Protection Generator
【摘要】 介绍了法国ALSTOM公司的LGPG111微机型发电机差动保护原理;分析了某电厂2号发电机—变压器组升压过程的波形数据和电压、电流时序图;阐述了变压器铁心磁通、磁滞回线和变压器励磁电流之间的物理关系;从多方面分析了LGPG111型发电机差动保护误动作的原因,并提出了防止发电机—变压器组升压过程中发电机差动保护误动作的措施。
【Abstract】 The article is introduced with the principle of LGPG111generator differential protection of ALSTOM Co.in France.The wave data of generator-transformer is analyzed during unit voltage built in the power plant.The physical relations among the transformer core magnetic field,hysteresis loop and excitation current of transformer are expatiated.Many reasons of generator differential protection miss-operation are analyzed.Then some conceits on preventing generator differential protection from miss-operating in unit voltage built are presented.
【关键词】 发电机;
变压器;
差动保护;
励磁;
磁滞回线;
谐波;
Proview软件;
【Key words】 generator; transformer; differential protection; excitation; hysteresis loop; harmonic; proview software;
【Key words】 generator; transformer; differential protection; excitation; hysteresis loop; harmonic; proview software;
- 【文献出处】 福建电力与电工 ,Fujian Power and Electrical Engineering , 编辑部邮箱 ,2003年01期
- 【分类号】TM307
- 【被引频次】1
- 【下载频次】133