摘要
为研究断路器操动机构关键轴上的摩擦力对断路器性能的影响,给断路器机械系统故障预测及诊断提供依据。建立了断路器操动机构的合、分双工况联合仿真模型并验证了模型的有效性;对断路器主轴、脱扣半轴等的摩擦力增大对断路器特性的影响进行了仿真分析。分析表明断路器关键轴上摩擦力增大是导致断路器拒动和误动的原因之一。提出了监测机械故障的特征量。
A circuit breakers （CB） operating mechanism dynamic model is established to study the influence of friction force on CB performance for CB mechanical faults diagnosis and prognosis. Simulation and experimanetal results have been obtained to validate the effectiveness of the proposed model. Based on this model, the effect of the changes of friction force on main shaft, trip shaft etc. on CB performance is analyzed, and the results show that the increase of friction force on key shafts could cause some serious faults on CB such as resisting closing, resisting opening which could be prognosticated by observing the features constructed from the proposed model. This study provides a significant criterion for research and development of fault prognosis for CB operating mechanism.
出处
《电工电能新技术》
CSCD
北大核心
2010年第1期41-44,80,共5页
Advanced Technology of Electrical Engineering and Energy
关键词
断路器
操动机构
仿真模型
摩擦力
故障诊断
circuit breaker
operating mechanism
simulation models
friction force
faults diagnosis
