Practical Simplified Circuit of Lightning Protective Device Installed on AC Power Lines
Xiaoqing Zhang · Gao dianya jishu · 2010
Traditional lightning protective devices have the shortcomings of too many components and bigger size etc in supplying protection.Aiming at these shortcomings,we first simplified the circuit of the typical surge protective device,supplying a simplified circuit.By means of the measured discharge characteristics,a simulation model was set up for the key component of the surge protective device,i.e.the gas discharge tube.On the basis of the model,PSCAD/EMTDC software was used to perform a simulation analysis for the lightning transient behavior of the two circuits of traditional and simplified surge protective devices.Meantime,surge protective devices were assembled and the lightning impulse experiments were made to obtain its transient responses.The measured response results were compared with the corresponding simulation results to confirm the validity of the simulation model.The results verify that the simplified circuit has the better performance and can replace the traditional surge protective device circuit.