The Research On Simulation Calculation And Measurement Of Impulse Ground Resistance Of Transmission Line Tower

In recent years, with the development of the power grid, the electric power facilitiesconstruction has been increasing year by year. To ensure the safety of the electricity systemreliable operation, and the corresponding increase the level of lightning protectionrequirements, so, the comprehensive system to analyze the transmission lines towergrounding device grounding resistance characteristics is the impact of become a concern.This research mainly aimed at the impact of grounding resistance do the simulationcalculation and measurement work of the research and exploration.There are a lot of tower impact of grounding resistance simulation calculation method,in this paper based on the principle of the harm long-term circuit theory method. In thesimulation software ATP-EMTP π model set up in the equivalent circuit model, in view ofthe current impulse function, spark discharge effect to the size of the body docking radiusof influence, and put forward a kind of grounding body distribution parameter of thenonlinear mathematical model. Using spark discharge area of correction, obtained thegrounding body hitting electric flowing down the grounding impedance. Improve thesimulation calculation model, making the calculation results more closer to the realsituations.Measuring work, using three very method for measuring the principle, design thetower grounding electrodes impact resistance test system, and the difference of thegrounding body tower impact resistance field test. Test results and the simulation resultshave good consistency, indirect the simulation model is correct. For transmission linestower impact current test, in domestic and international literature did not report, which isfirst. The use of a grounding device include all kinds of hv transmission line in generalengineering structure, make research has more actual application value.Then, collecting the existing simulation results, and by establishing a database,management of the existing simulation data, and through the conditions inquires establishedinquires model window, may at any time quick v simulation results, for the followingsimulation and actual applied to provide the reference.