Advanced Model of Space Charge Used for Simulation of Conductor under Lightning Strike

A space charge model is built to analyze the process of the discharge for single phase conductor under lightning strike. The special electric filed around the conductor is calculated by charge simulation method and Lapalace method. In the calculation, the operating voltage, lightning downward leader, induced charge, space charge and upward leader are considered. The shape of space charge zone is guided by the calculated electric field. After the space charge zone is established, the quality of space charge can be achieved in the discharge process. The result with different voltage or amplitude of lightning current is compared with the existing model.