Discusses on-line monitoring of electric parameters, such as dielectric loss, divulging current, equivalent capacitance and running voltage, and presents an on-line monitoring system of insulation quality, based on mo...Discusses on-line monitoring of electric parameters, such as dielectric loss, divulging current, equivalent capacitance and running voltage, and presents an on-line monitoring system of insulation quality, based on monitoring divulging current and dielectric loss of high voltage equipment, and its advantages, such as helping people to discover the hidden problems in a timely manner, to reduce power cut and overhaul and to improve security of power supply.展开更多
On-line measurement for dielectric loss angle can effectively monitor the insulation condition of capacitive equipment in power systems. Synthetic relative measuring methods not only markedly overcome the shortcomings...On-line measurement for dielectric loss angle can effectively monitor the insulation condition of capacitive equipment in power systems. Synthetic relative measuring methods not only markedly overcome the shortcomings of traditional absolute measuring methods but also greatly improve the accuracy of dielectric loss angle measurement. However, synthetic relative measuring methods based on two or three pieces of capacitive equipment do not have the characteristic of generality. In this paper, a principle of synthetic relative measuring method is presented. The example of application for synthetic relative methods based on three and four pieces of capacitive equipment running in the same phase is taken to present the failure judgment matrices for N pieces of equipment. According to these matrices, the fault condition of N pieces of capacitive equipment can be watched, which is more general. Then some problems needing to be concerned along with two diagnostic methods used in diagnostic system are introduced. Finally, two programmable flow charts for the two methods are given and corresponding examples demonstrate their feasibility in practice.展开更多
针对现有监控告警技术存在的监控信息量大、事故处置效率低、易漏判误判等不足,需引入面向生产管控数据的电力设备状态预警模块予以解决。设备状态预警策略需对全量监测所得相电压、相电流、负荷等数据及实时报文进行研判,并直观展现预...针对现有监控告警技术存在的监控信息量大、事故处置效率低、易漏判误判等不足,需引入面向生产管控数据的电力设备状态预警模块予以解决。设备状态预警策略需对全量监测所得相电压、相电流、负荷等数据及实时报文进行研判,并直观展现预警研判结果,帮助监控人员实时监测相关设备的健康状况。通过梳理500 k V变电站电力设备典型异常现象,研究电力设备状态预警策略,以期为提升监控处置效率提供一定的技术支撑。展开更多
文摘Discusses on-line monitoring of electric parameters, such as dielectric loss, divulging current, equivalent capacitance and running voltage, and presents an on-line monitoring system of insulation quality, based on monitoring divulging current and dielectric loss of high voltage equipment, and its advantages, such as helping people to discover the hidden problems in a timely manner, to reduce power cut and overhaul and to improve security of power supply.
文摘On-line measurement for dielectric loss angle can effectively monitor the insulation condition of capacitive equipment in power systems. Synthetic relative measuring methods not only markedly overcome the shortcomings of traditional absolute measuring methods but also greatly improve the accuracy of dielectric loss angle measurement. However, synthetic relative measuring methods based on two or three pieces of capacitive equipment do not have the characteristic of generality. In this paper, a principle of synthetic relative measuring method is presented. The example of application for synthetic relative methods based on three and four pieces of capacitive equipment running in the same phase is taken to present the failure judgment matrices for N pieces of equipment. According to these matrices, the fault condition of N pieces of capacitive equipment can be watched, which is more general. Then some problems needing to be concerned along with two diagnostic methods used in diagnostic system are introduced. Finally, two programmable flow charts for the two methods are given and corresponding examples demonstrate their feasibility in practice.
文摘针对现有监控告警技术存在的监控信息量大、事故处置效率低、易漏判误判等不足,需引入面向生产管控数据的电力设备状态预警模块予以解决。设备状态预警策略需对全量监测所得相电压、相电流、负荷等数据及实时报文进行研判,并直观展现预警研判结果,帮助监控人员实时监测相关设备的健康状况。通过梳理500 k V变电站电力设备典型异常现象,研究电力设备状态预警策略,以期为提升监控处置效率提供一定的技术支撑。
