Abstract：Based on the principle of similar triangle,the calculation method of conversion coefficient (A) between impulse grounding resistance and power frequency grounding resistance is derived.Taking A-value,inflection point and included angle of adjacent known characteristic lines as reference points,the calculation steps and calculation formulas of three interpolation methods are derived by using linear interpolation theory.The results show that the inflection point method is the best,the A-value method is the second,and the included angle method is the worst,the interpolation results of (100,500] interval are not ideal.After the exploration and improvement of inflection point method,the interpolation effect in the (100,500] interval is greatly improved,and its accuracy can meet the requirements of business use.After programming it into a mobile phone app,it is more helpful for practical work.
吴华斌, 王光波. 冲击接地电阻与工频接地电阻换算系数计算方法研究[J]. 气象水文海洋仪器, 2021, 38(3): 1-4.
Wu Huabin, Wang Guangbo. Method for calculating conversion coefficient between impulse grounding resistance and power frequency grounding resistance. Meteorological Hydrological and Marine Instrument, 2021, 38(3): 1-4.