摘要
特高压直流电压互感器承担着连接一次侧输电线路和二次侧控制保护装置的重要任务,其工作状态直接影响到整个直流输电系统的运行性能,而在线监测则是直流互感器运行维护的重要手段。现场运行经验表明:雷电干扰、互感器闪络和电容击穿故障是影响直流电压互感器工作状态的主要因素。文中通过仿真分析与实际测量相结合,对上述3种在线监测特征量进行分析,设计了包括多传感器多特征量提取模块,故障波形存储及判别模块在内的±1 100 kV直流电压互感器在线监测系统,并对所设计窄带型空心线圈传感器进行了暂态性能测试,实测波形与标准相吻合。
UHVDC voltage transformer connects the primary transmission line and the control protection devices on secondary side. Its working state directly affects the operation performance of UHVDC system. So on-line monitoring is important for UHVDC voltage transformer＇ operation and maintenance. The experience from field operation shows that lightning disturbance, transformer flashover and capacitor breakdown are the key factors affecting the working condition of UHVDC voltage transformer. In this study, simulation and measurement are adopted to analyze the above three monitoring features, and a ±1 100 kV DC voltage transformer on-line monitoring system, including a multi-sensor and multi-feature extraction module and a fault waveforms storage and judgment module, is designed. Moreover, the transient performance of the designed air-core coil sensor is tested, and the measured waveform agrees well with the standard one.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第6期1-7,共7页
High Voltage Apparatus
