摘要
以漫湾二期和景洪发电机主保护设计为例,分析了7种主保护配置方案,主要比较了其中性能较好的2种方案在发电机内部故障时的动作情况及不能动作故障类型,说明在大中型水轮发电机主保护的定量化设计中,除了引入故障的存在几率——发电机实际可能发生的同槽和端部交叉故障,还应考虑内部短路的发生几率。由于不同的主保护配置方案均存在各自的保护死区,在保护死区相差不大的主保护配置方案的抉择中,应倾向于不能动作故障类型发生几率低的主保护配置方案,同时综合考虑其他因素,合理确定最终的主保护配置方案,以兼顾设计的科学性和实用性。
In the design of main protection for two hydro-generators in Manwanerqi and Jinghong power stations,seven possible main protection configuration schemes are analyzed,then the non -operation fault number and type of two schemes with better protection performance are further compared. According to above design work,the occurrence probability of internal faults should be considered in the quantitative design of main protection schemes for large and medium generators, while possible slot and end faults occurring on the stator winding are accounted for. As different main protection configuration schemes have their own non-operation fault types,the scheme with lower occurrence probability of non-operation fault types should be chosen first. Considering other factors,the final main protection configuration scheme is then determined to meet both scientific and practical requirements.
出处
《电力自动化设备》
EI
CSCD
北大核心
2006年第6期1-4,共4页
Electric Power Automation Equipment
关键词
水轮发电机
主保护配置方案
定量化设计
内部短路
发生几率
hydro-generator
main protection configuration scheme
quantitative design
internal fault
occurrence probability
