CAJ | 학술논문

高压开关柜局部放电的快速准确检测对于保障电网安全运行、提高供电可靠性具有重要意义。论文分析了检测高压开关柜局部放电的TEV方法与超声波方法的原理及相应的优缺点，并研制了TEV传感器。设计了针板放电、内部放电、悬浮放电和沿面放电四种典型的局部放电模型，搭建了一套基于TEV与超声波相结合的局部放电检测实验平台，通过模拟实验，利用TEV与超声波相结合的方法实现了局部放电源的定位，经验证该方法精确度较高，对局放检测有一定的实用价值。
고압개관거국부방전적쾌속준학검측대우보장전망안전운행、제고공전가고성구유중요의의。논문분석료검측고압개관거국부방전적TEV방법여초성파방법적원리급상응적우결점，병연제료TEV전감기。설계료침판방전、내부방전、현부방전화연면방전사충전형적국부방전모형，탑건료일투기우TEV여초성파상결합적국부방전검측실험평태，통과모의실험，이용TEV여초성파상결합적방법실현료국부방전원적정위，경험증해방법정학도교고，대국방검측유일정적실용개치。
The safe and reliable operation of high voltage (HV) switchgear directly influences the reliability of the whole substation’s power supply, so the partial discharge detection of HV switchgear is particularly important. This paper mainly analyzes the principle of transient earth voltage (TEV) and ultrasonic wave methods of partial discharge detection of HV switchgear, and the advantages and disadvantages of these two methods. Four typical models of partial discharge, namely needle plate discharge, internal discharge, suspended discharge and surface discharge, are designed; and an experimental platform of partial discharge detection based on the combination of TEV and ultrasonic wave is designed. Through simulation experiments, the combination of TEV and ultrasonic wave methods is used to locate the orientation of the partial discharge source. This method is verified to be more accurate and practical for partial discharge detection.