变电设备在线监测系统技术导则
水轮发电机组状态在线监测系统运行维护与检修试验规程
燃煤锅炉一氧化碳在线监测系统技术规范
变压器绕组测温在线监测系统
Z_Temp-OTF-9000变压器荧光光纤在线监测系统 光纤测温仪能直接、实时、准确地测量变压器线圈的温度。由于同时带有 RS-485数据输出和模拟输出,光纤测温仪非常容易同监控和数据采集系统或其他数据录入系统连接。根据现场使用经验总结,自主研制的光纤传感器更加牢固,ST 标准连接器使其在变压器油箱接口处更为方便、灵活。该传感器由直径为 300um 的特种石英光纤制成,更加柔韧,光纤传感器在弯曲半径 3cm 左右时也不会折断。
基于超宽频电压监测的大型水电站雷击暂态过电压分析
水电站出线遭受雷击时将产生严重的雷击侵入过电压,站内GIS(气体绝缘组合电器)隔离开关和断路器操作也将激发VFTO(特快速暂态过电压),严重威胁GIS及变压器设备的绝缘安全。为此,在水电站主变压器高压侧的GIS设备上增设超宽频暂态电压传感器,构建水电站暂态电压在线监测系统,完整记录水电站出线遭受雷击时的站内暂态响应过程。通过对暂态电压时域和频域特征分析发现:水电站出线遭受雷击接地故障时,断路器可能出现断口重燃;基于侵入水电站的雷击暂态电压波形可实现准确的故障单端定位,当线路雷击距离水电站10 km以内时,侵入水电站内部的暂态电压将威胁变压器绝缘。利用超宽频暂态电压监测系统可准确记录水电站内异常暂态事件,通过各测点暂态波形的时域和频域特征对比分析,可定位暂态激励源位置,有助于发现设备异常并及时预警,保障设备运行可靠性和水电稳定外送。 When lightning strikes the outgoing lines of a hydropower station, it induces severe overvoltages. Then, the operation of gas-insulated switchgear(GIS) and circuit breakers within the station also triggers very fast transient overvoltages(VFTO), posing a significant threat to the insulation safety of GIS and transformer equipment. To address this, an ultra-wideband transient voltage sensor is installed on the high-voltage side of the GIS equipment at the main transformer of the hydropower station. This establishes an online monitoring system for transient voltages, capturing the transient response process in the hydropower station during lightning strikes on its outgoing lines.Through the analysis of time domain and frequency domain characteristics of transient voltage, it is observed that when the outgoing lines of the hydropower station experience a lightning-induced ground fault, fracture reignition may occur in the circuit breaker. Based on the waveform of the lightning transient voltage infiltrating the hydropower station, accurate single-end fault location can be achieved. When the lightning strike on line