For assuring safe operation of 66 kV resonant grounding system

such two parameters as the damping resistance and the detuning degree of the arc suppression coil need to be reasonably configured. However

the distributed compensation operation makes the parameter setting difficult. In this paper

a kind of decentralized compensation strategy is proposed

which considers such core data as residual current

recovery speed of faulty phase voltage

residual value of the zero-sequence voltage decay after the fault

and the displacement degree. It is obtained by way of experiment that the faulty residual current shall be less than 7 A and the recovery speed of faulty phase voltage shall be lower than 500 V/ms. On this basis

the parameter optimization constraint equation is proposed

and the gradient descent method is used to obtain the maximum value of detuning degree and the minimum value parameters of damping resistance. Finally

an actual 66 kV resonant grounding system is used as an example to verify the effectiveness of the proposed compensation strategy by simulation.