Title :
Wind Resource Concession Approach in China
Author :
Raufer, R. K. ; Wang, S. J.
Abstract :
Single-pole tripping of circuit breakers at the end of a transmission line for clearing LG fault (single phase to ground fault) produces high negative sequence current in nearby generators. Inserting a capacitor-connected between the ground and neutral of wye winding of a transformer at the end of the transmission line under open phase conditions-causes the net zero sequence reactance, which shunts the negative sequence network, to be zero. The negative sequence current is eliminated. The power transfer with one phase open, during single pole switching, becomes equal to pre-fault power and the transient stability limit is highly enhanced. Power swing is reduced.
Keywords :
capacitance; earthing; electric reactance; power capacitors; power transmission lines; switching; EHV transmission line; capacitance grounding; circuit breakers; high negative sequence current; negative sequence network; net zero sequence reactance; power swing reduction; power transfer; pre-fault power; single phase to ground faults clearing; single-pole switching; transformer wye winding; transient stability limit; zero sequence reactance; Capacitance; Circuit breakers; Circuit faults; Circuit stability; Distributed parameter circuits; Grounding; Power generation; Power system transients; Power transmission lines; Transmission lines;
Journal_Title :
Power Engineering Review, IEEE
DOI :
10.1109/MPER.2002.1029975
