中性点不接地、经消弧线圈接地系统发生单相接地故障时检出接地故障的一种方法——相对原理、双重判据法。理论分析和实践检验结果表明了该方法的正确性和有效性。它可以满足接地故障选线的可靠性、准确性和灵敏度的要求。
Relative Principle and Double Criterion Method are one of the methods to detect grounding fault when neutral point is not grounded and single-phase grounding fault occurs in arc suppression coil grounding system. The results of theoretical analysis and practical test show that the method is correct and effective. It can meet the requirements of reliability, accuracy and sensitivity of grounding fault line selection.
小电流接地选线装置的应用，很好地解决了供电系统外输电线路单相接地选线问题，避免了以往拉在进行单相接地选线时，大量的倒闸操作及对电厂安全运行造成的安全隐患；大大提高了电厂供电的安全可靠性；另外也提高了查找接地点的效率。
The application of the low current grounding line selection device solves the problem of single-phase grounding line selection for transmission lines outside the power supply system, avoids a large number of switching operations and potential safety hazards to the safe operation of power plants when single-phase grounding line selection is carried out in the past, greatly improves the safety and reliability of power supply in power plants, and also improves the safety and reliability of power supply. Efficiency of locating grounding points