Study on accurate calculation for non-complete phases condition of double circuit line and its single-pole reclosing
LIN Jun, TANG Qi(College of Electric Engineering, Fuzhou University, Fuzhou 350002, China)
By precise model of distributed parameters, running condition of a 500kV double circuit line with the non-complete phases is calculated, with or without parallel reactors. The phase relationship of voltages between fault line and no-fault lines is analyzed both under permanent fault condition and instantaneous fault condition. The integrating criterion for distinguishing permanent or instantaneous fault condition is put forward using voltage amplitude of fault-phase, phase relationship of voltages between fault line and no-fault lines, and harmonic of fault phases voltage. By this method, the single-pole reclosing under selected condition can be completed and the impact on the power system and equipments through reclosing on the permanent fault line could be avoided.
【CateGory Index】： TM744