摘要
根据WFBZ 0 1型微机发电机 变压器组保护在漫湾发电厂发电机 变压器组保护换型改造中的应用 ,介绍装置的主要特点、保护配置、工程实施及保护运行情况。通过对漫湾发电厂发电机不完全纵差保护、发电机匝间保护、发变组差动保护不平衡电流偏大的原因进行检查分析 ,确定了漫湾发电厂采用比率制动特性原理的发电机差动保护初始动作电流的整定值。漫湾发电厂在采用单元接线的发电机、变压器中间加装了发电机出口断路器 ,由于断路器两端都装有冲击波吸收电容 ,给发电机三次谐波定子接地保护的整定带来了困难 ,通过分析、处理 。
According to the application of WFBZ? 01 microcomputer based protection for generator transformer unit in Manwan hydropower station,its main characters,disposition,implementation and operation are introduced.Based on the investigation and analysis of the greater unbalanced currents of incomplete generator differential protection,generator inter turn protection and generator transformer differential protection,the setting values are determined based on percentage differential protection.There is a generator circuit breaker between generator and transformer in Manwan power station.The surge absorbing capacitors on both sides of generator circuit breaker bring difficulty to the setting of generator stator grounding protection based on third harmonic. By analysis and treatment,the useful research has been done for solving this kind of problem.
出处
《电力自动化设备》
EI
CSCD
北大核心
2001年第3期44-48,共5页
Electric Power Automation Equipment
