Determination of Overvoltages in High Voltage Networks at Single Phase Faults by Numerical Simulation and Experiments

Curcanu George, Toader Dumitru, and Toaxen Vasile


HV network, overvoltages, numerical simulation


The paper presents studies by numerical simulation and experiments carried out to determine the transient overvoltages and homopolar currents in an 110/24 kV network from Romania at net and intermittent ground of one phase the neutral being connected by transformer and compensation coil parallel with three-phase coil having commutable neutral point earthing during short-circuit test. Also the paper presents the preventive measures for limiting overvoltages.

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