CAJ | 학술논문

针对脉冲电流法或特高频法在单一应用于GIS局部放电监测时的局限性，研发、应用了基于多传感器的集成监测系统。根据GIS及电缆终端产生局部放电信号的不同传播特性，采用特高频传感器感应内部空间传播的电磁波信号，采用脉冲电流传感器耦合接地线上的高频放电电流信号。基于不同方法的抗干扰性，分析实时采集的局部放电指纹，提取、比对电磁波及脉冲波形信号，以过滤外部干扰，区分放电信号类型。应用效果分析表明，监测系统能够提高GIS及电缆局部放电识别与定位的准确性。
침대맥충전류법혹특고빈법재단일응용우GIS국부방전감측시적국한성，연발、응용료기우다전감기적집성감측계통。근거GIS급전람종단산생국부방전신호적불동전파특성，채용특고빈전감기감응내부공간전파적전자파신호，채용맥충전류전감기우합접지선상적고빈방전전류신호。기우불동방법적항간우성，분석실시채집적국부방전지문，제취、비대전자파급맥충파형신호，이과려외부간우，구분방전신호류형。응용효과분석표명，감측계통능구제고GIS급전람국부방전식별여정위적준학성。
Aiming at the limitations of using the partial discharge impulse current method or UHF method in monitoring GIS, the integrated monitoring system based on multi sensor was researched and developed. According to the different propagation characteristics of partial discharge signals of the GIS and cable, we used the UHF sensor to detect the internal electromagnetic wave and impulse current sensor to detect the current signal. Based on the interference resistance of different methods, we gathered the partial discharge fingerprint during the analysis, extracted and ratio the electromagnetic wave and the impulse wave signal to filter out the external interference and differentiate the types of discharge signal. Results show that, the monitor system can improve the accuracy of recognition and location.