Nanchang Power Short-Circuit Current Research

Nanchang 220kV power has already formed double-looped network structure, Net through 220kV double-looped network to the city and rural power supply. By gan edom 500kV nanchang power substation, for to the change, the 220kV, AiHu variable, the field of view, DongGu variable, longshan, double port, nanchang power supply, In JinXian for power substation 500kV, to change, change of doumen 220kV, wu hillock ushers to change, power supply; liantang West to 500kV ganjiang dream for power substation, mountain west, red field 220kV power, peach court change.Due to the expansion of power substation and new equipment, new stations, bus operation of short-circuit capacity calculation is slowly rising trend, numerical 110 kv substations nanchang power 220kV busbar single-phase three-phase short-circuit current capacity than 110 kv substations short-circuit capacity, short-circuit capacity bus voltage side than single-phase three-phase value or equivalent.For the analysis of short-circuit current, power cut in the largest operational modes of data for 2008 nanchang power substation of busbar all the short-circuit current and short-circuit capacity of the calculation. From the results of 110 kv substations, consumers 10kV busbar short-circuit current, a part of larger than switch short-circuit capacity of the switch.Calculation results show that the consumers 10kV generatrix of 110 kv substations, switch short-circuit current large short-circuit capacity limitation, which comprises two requirements of 110 kv transformer substation, above the normal operation mode of operation in order to decrease the juxtaposed don't short-circuit capacity systems.Through the grid of nanchang short-circuit current, puts forward the nanchang power restriction of short-circuit current in nanchang, the limit of short-circuit current power open-loop operation.it method and the stability of the feasibility study, puts forward the power of open-loop may influence and related remedial measures. After the operation of power ring opening of the actual situation of short-circuit current analysis and evaluation.