UNITROL 5000励磁系统故障引起的发电机失磁保护动作分析及定值优化  

Operation Analysis and Setting Value Optimization of Generator Loss of Excitation Protection Caused by UNITROL 5000 Excitation System Fault

作　　者：陈锋云 陈洁 CHEN Fengyun;CHEN Jie(Zhejiang Zheneng Wenzhou Liquefied Natural Gas Co.,Ltd.,Wenzhou 325700,China;Zhejiang Zheneng Yueqing Electric Power Generation Co.,Ltd.,Wenzhou 325600,China)

机构地区：[1]浙江浙能温州液化天然气有限公司,浙江温州325700 [2]浙江浙能乐清发电有限责任公司,浙江温州325600

出　　处：《电工技术》2021年第2期32-34,50,共4页Electric Engineering

摘　　要：文章简述了浙能乐清电厂660 MW机组励磁系统故障引起的1号发电机失磁保护动作的原因及处理措施,强调了重大反事故措施在励磁专业落实的重要性。通过绘制失磁故障过程中发电机机端正序阻抗轨迹,确认了失磁保护的灵敏性和可靠性,修改了失磁保护出口方式为解列灭磁。介绍和校核发电机失磁保护与AVR低励限制的配合整定原则和计算方法,确保限制先于保护而动作。The causes and treatment measures of excitation loss protection action of No.1 generator caused by excitation system fault of 660 MW unit in Yueqing power plant of zheneng are briefly introduced.The importance of implementing major anti accident measures in excitation specialty is emphasized.By drawing the positive sequence impedance trajectory of the generator terminal during the loss of excitation fault process,the sensitivity and reliability of the loss of excitation protection are confirmed,and the exit method of the loss of excitation protection is modified to de-excitation.The coordination setting principles and calculation methods of generator loss-of-excitation protection and AVR low-excitation limit are introduced and verified to ensure that the limit acts before the protection.

关 键 词：失磁保护 励磁系统外部跳闸 解列灭磁 正序阻抗 低励限制 

分 类 号：TM312[电气工程—电机]