Title :
Experimental investigations and calculations in 6–35 kV networks with various neutral conditions
Author :
Shirkovets, A. ; Vasilyeva, A. ; Telegin, A.
Author_Institution :
LLC BOLID, Novosibirsk, Russia
Abstract :
Resonant grounded or ungrounded neutral system produces specific overvoltages, e.g. overvoltages at single line-to-ground arcing faults. Theoretical research and field experience show that reducing overvoltage levels at arcing ground faults and decreasing the number of ground faults without increasing of ground-fault currents can be reached by connecting the neutral of the transformer to ground through a high-value resistor. Determination of real capacitance current value in 6-35 kV network is urgent and needs accurate solution.
Keywords :
earthing; power distribution faults; power transformers; a high-value resistor; capacitance current value determination; distribution networks; ground fault currents; overvoltage level reduction; resonant grounded system; single line-to-ground arcing faults; transformer; ungrounded neutral system; voltage 6 kV to 35 kV; Analytical models; Computer science; Fault tolerance; Hardware design languages; Information analysis; Information technology; Microcontrollers; Microprocessors; Single event transient; Transient analysis;
Conference_Titel :
Electric Power Quality and Supply Reliability Conference (PQ), 2010
Conference_Location :
Kuressaare
Print_ISBN :
978-1-4244-6978-9
DOI :
10.1109/PQ.2010.5549997
