Title :
The method for automatic compensation and detection of earth faults in distribution network
Author :
Yuqin, Xu ; Zhiye, Chen
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ., Baoding, China
Abstract :
The idea for a grounding neutral scheme for MV distribution networks is that when an instantaneous single-phase-to-earth fault occurs, the fault arc disappears automatically because of the rapid compensation of arc suppression coil current. The power supply is continuous. When a permanent single-phase-to-earth fault occurs it can detect and trip the faulty feeder in a short time. This scheme can be achieved by a TSC (thyristor switched capacitor) automatic tuning arc suppression coil with a parallel resistor. This paper presents the compensation principle of earth capacitance current and the detection methods of a faulty feeder. It also discusses the selection of the parallel resistor value. The simulation results based on EMTP-ATP show that this scheme is both correct and effective.
Keywords :
capacitor switching; earthing; power distribution faults; power distribution protection; power system analysis computing; thyristor circuits; EMTP-ATP; MV distribution network earth fault detection; arc suppression coil current compensation; automatic fault compensation; computer simulation; earth capacitance current; fault arc; faulty feeder; instantaneous single-phase-to-earth fault; parallel resistor; permanent single-phase-to-earth fault; thyristor switched capacitors; Arc discharges; Capacitors; Coils; Current supplies; Earth; Fault detection; Grounding; Power supplies; Resistors; Thyristors;
Conference_Titel :
Power System Technology, 2002. Proceedings. PowerCon 2002. International Conference on
Print_ISBN :
0-7803-7459-2
DOI :
10.1109/ICPST.2002.1067833
