Transient Characterization of GIS Grounding Network

GIS substation in the switch action, lightning strikes and line short-circuit will appear transient process, at this time there will be rapid changes in the large current through the grounding conductor into the grounding network, resulting in changes in grounding network ground potential, the aboveground part of the circuit calculation technology is mature, the calculation of the underground part of the calculation needs to take into account the spark effect and the soil conditions, the calculation of the difficulty. In this paper, we propose an iterative method based on the GIS substation grounding network transient potential rise calculation method, through the division of time and space, to achieve the purpose of the division of the aboveground and underground part of the circuit, and gradually iterative until the port voltage is the same, the use of time and space division of the computational technology, to solve the problem of the complexity of the large system is difficult to simulate.