Measuring method of one-phase grounding capacitive current in 10 kV distribution network

As for 10 kV distribution network with small neutral point grounding resistor or arc-suppression coil,the key problem is whether the calculation of grounding capacitive current in 10 kV main bus is right.This paper introduces the composition of one-phase grounding capacitive current in weak current grounding system,and points out the calculation method of capacitive current is an effective way for judging if it needs to equip the small grounding resistor or arc-suppression coil in a new project.The different calculation methods of one-phase grounding capacitive current in various condition are analyzed.The real case that comparing the theoretical calculation with practical measurement of capacitive current in 10 kV main bus in 110 kV substation verifies the measuring method is very precise,and it is worthy to be applied widely.