Simulation And Analysis Of Experiment Of Impulse Characteristics Of Grounding Device

The grounding device which greatly used in the power plant and substation isbasic equipment that protect power lines and power apparatus from lightning current.The lightning protection performance of power grid affected by The impulsecharacteristics of grounding device directly. The lighting transient characteristics ofgrounding devices in high current amplitude is much different from its frequencypower characteristics and it’s the fundament of lightning protection of power systemand.so it is necessary to analysis the lighting transient performance of groundingdevice.However，because of the particularity of experimental investigation condition andthe experiment results always influenced by those interference. We should make sureof the text plan and choose the suitable equipment.To address the above issues. a equivalent model based on fully consider at aboutthe experiment details is presented in this paper. Those equipments used intheexperiment were given the model such as High instantaneous current enigenerato,voltage divider, grounding device and so on. The experimental investigation modelcan not only simulate the time-varying characteristics of various parameters under thelightning current, but can be used to analysis the where the experimental error comefrom, and it’s also helpful in choosing equipment before doing the experiment. Theimpulse grounding resistance in higher current can be calculated by using theexperiment investigation model.The results calculated by using the experimental investigation model arecompared with authoritative data from the field test, The comparative results showthat the results of the model are very close to the real situation.Then the paperdetailedly analyses the impulse characteristics of grounding devices under thelightning current. and get a lot of calculation results of the wavefrom of impulse experiments. And I give some advice about how to choose the experiment equipmentwhile I discuss the influences of different factors on the impulse groundingexperiment.The above research results of the impulse experiment for grounding deviceprovide a great help for the further research.