CAJ | 학술논문

为限制超标的单相接地电流而在矿井高压电网中引入了消弧线圈，这使得现有漏电保护的选择性性能受到严重影响。本文在分析电网漏电故障规律及现有检漏装置原理基础上，提出将五次谐波方向原理用于井下高压隔爆开关中，从而使选择性漏电保护适于各种中性点接线方式的电网。重点介绍以微控制器为核心的选择性漏电保护系统的硬、软件结构及干扰抑制措施，最后给出试验结果。
위한제초표적단상접지전류이재광정고압전망중인입료소호선권，저사득현유루전보호적선택성성능수도엄중영향。본문재분석전망루전고장규률급현유검루장치원리기출상，제출장오차해파방향원리용우정하고압격폭개관중，종이사선택성루전보호괄우각충중성점접선방식적전망。중점개소이미공제기위핵심적선택성루전보호계통적경、연건결구급간우억제조시，최후급출시험결과。
The installed selective leakage protection equipment for underground HV networks does not work properly owing to the application of the arc-suppression coil,by which the earthing current is compensated.On the basis of analyzing the fault law of leakage and the principles of present leakage protection equipment,the paper presented a selective leakage protection method suitable for all kinds of underground HV networks,which operates according to the fifth harmonic direction of the zero sequence current as well as the value of the zero sequence voltage.The hardware structure,software design and anti-interference of the system are emphatically discussed.Finally,the testing result is described as well.