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Transmission Line Tower 输电杆塔
接地电阻ground resistance
线路耐雷水平Lightning withstand level of Transmission lines
雷击跳闸率rate of lightning trip-out
接地体Grounding Body
down-conductor system引下线
信号注入探头signal injection probe
电流钳表Current Clamp

Abstract

The ground resistance of transmission line tower has important significance in improvement of the lightning withstand level of transmission lines and reduction of the lightning trip-out rate. Determination of ground resistance accurately、speedily, and conveniently is an important approach and method to inspect the eligibility of grounding bodies and put forward the relative modification plans. Thus, it is specially important to study out a method and instrument to determine the ground resistance of transmission line tower. This paper firstly introduced in details on the methods and instruments for determination of the ground resistance of transmission line tower used be China and foreign countries，then analyzed their advantages and disadvantages in details. In the second chapter of this paper, the author put forward a new measuring mode and practical calculation method for determination of the ground resistance of transmission line tower based on the characters of the ground bodies of transmission line tower after analysis of the properties of ground body. This method can determine the ground resistance without undoing the down-conductor system of the transmission line tower, and solved the most malpractice presented in current methods. In the third chapter of this paper, the author analyzed the determining mode with PSCAD software, and gained plenty of data after modification of relative parameters in the model. Finally, the author suggested several important factors affecting the accuracy of determination through analysis of data and put forward the method for error amendatory, the result showed that the method was rational.
In the final chapter of the paper, the author introduced the hardware of the instrument, and analyzed the signal injection probe of the power supply and the current clamp for determination.

Keywords: Transmission line tower；Ground resistance；Model；Measuring

Abstract
The earth resistance regarding enhances the line to bear the thunder level, reduces is struck by lightning tripping rate to have the vital significance. Accurate, fast, conveniently surveys the earth resistance value is the examination meets the terrain to be qualified or not and proposed correspondingly reorganizes the plan the important way and the method. Therefore, studies one kind of convenience accurate pole earth resistance the measuring technique and the instrument appears especially essential .
This article first has given the detailed introduction to the present domestic and foreign commonly used earth resistances measuring technique and the instrument, and has carried on the detailed analysis on their respective existence good and bad points .
In the paper second chapter, according to the pole terrain characteristic, after has analyzed meets the terrain the electric circuit nature, proposed one kind of new earth resistance survey model and its the measuring technique, and has produced the earth resistance value concrete algorithm. This method does not need to untie the pole downlead then to carry on the earth resistance survey, has solved the biggest malpractice which in the existing measuring technique exists .
In the paper third chapter, (PSCAD) has carried on the analysis using electric power simulation software to the survey model, after change model related parameter, obtained the massive surveys data. Finally, through logarithm according to the analysis, has produced the influence survey accurate several important attributes. Proposed the error correction method, after the revision result indicated the method had the rational article finally partially to give the introduction to the instrument hardware constitution, regarding provided surveys the electric current pliers table which the power source the signal poured into pokes head in and surveys uses to carry on the analysis with emphasis .

Abstract
The earth resistance regarding enhances the line to bear the thunder level, reduces is struck by lightning tripping rate to have the vital significance. Accurate, fast, conveniently surveys the earth resistance value is the examination meets the terrain to be qualified or not and proposed correspondingly reorganizes the plan the important way and the method. Therefore, studies one kind of convenience accurate pole earth resistance the measuring technique and the instrument appears especially essential .
This article first has given the detailed introduction to the present domestic and foreign commonly used earth resistances measuring technique and the instrument, and has carried on the detailed analysis on their respective existence good and bad points .
In the paper second chapter, according to the pole terrain characteristic, after has analyzed meets the terrain the electric circuit nature, proposed one kind of new earth resistance survey model and its the measuring technique, and has produced the earth resistance value concrete algorithm. This method does not need to untie the pole downlead then to carry on the earth resistance survey, has solved the biggest malpractice which in the existing measuring technique exists .
In the paper third chapter, (PSCAD) has carried on the analysis using electric power simulation software to the survey model, after change model related parameter, obtained the massive surveys data. Finally, through logarithm according to the analysis, has produced the influence survey accurate several important attributes. Proposed the error correction method, after the revision result indicated the method had the rational article finally partially to give the introduction to the instrument hardware constitution, regarding provided surveys the electric current pliers table which the power source the signal poured into pokes head in and surveys uses to carry on the analysis with emphasis .