| The paper analyses the principle of the compensating network, and studies tracking compensation director of the Peterson coil with the thyristor series capacitors based on industrial personal computer. By analyzing the method of single-phase earth fault line selection, based on active power, variety of residual current, phase-to-ground Admittance, the paper studies the device of single-phase earth fault line selection. The paper puts forward the integral control of automatic resonance and faulted line selection.
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