Research And Application Of The Rogowski Coil Ground Resistance Tester

In this paper,the significance of grounding resistance test for the safe and stable operation of power network is analyzed,and the existing grounding resistance tester domestic and overseas is analyzed.The advantages and disadvantages of the grounding resistance tester in our country at present is analyzed.The scheme is put forward to solve the problems existing in the grounding resistance tester at present.In this paper,the Roche coil grounding resistance tester is introduced in detail,its structure composition is expounded,the principle of its internal and external components is explained in detail,and the function of each component is analyzed.The measurement parameters of the tester and the characteristics of the product are described.The ground grounding method and the operation method of the tester are introduced.The emphasis of this paper is the application part of the Roche coil grounding resistance tester.A large number of data on site are compared,which from various situations(including exit tower,same pole tower,non-identical pole tower,new tower).It is proved that the data of grounding resistance measured by Rockwell coil earthing resistance tester is reliable and correct in power theory.At the same moment,.A large number of test data are collected and recorded in the actual work of transmission,which is used to analyze the practicability,reliability and accuracy of the Roche coil grounding resistance tester.Three testing methods(ZC-8 method,clamp table method and Roche coil grounding resistance method)are used to compare in the same group of tests.According to the data,the advanced nature,intelligence and high efficiency of the Roche earthing resistance tester are proved.The Roche coil grounding resistance tester provides reliable data for calculating lightning resistance level of power transmission lines in Fushun Power supply Company and makes a great contribution to lightning protection evaluation in Fushun area.