This article at present has the problem through the docking network the analysis and its reduces groudnet the resistance in domestic and foreign development survey inquiring into, from essentially analyzes the earth resistance the influence factor, has analyzed the survey earth resistance method, how reduces the network the earth resistance. Through to each kind of reduces resistance measure,...

Fractal geometry is one of the most important discoveries of mathematicalscience. Nowadays fractal techniques are widely used in natural and social science.This paper discusses some applications of fractal in electric power system, which isincluding three aspects.Firstly, study of arcing fault with fractal tools. The sampling data of arcing faultto earth of transmission line is analyzed with R...

Electrostatic discharge (ESD) damage to IC(Integrated Circuit) has been paid more attention than ever. This paper introduces generation of static electricity, three kinds of ESD models and test methods, and ESD protection circuit. ESD failure mode, failure mechanism, experiment plan and results, and failure signature of the three ESD models are discussed. This work will help for identifying ES...

In this thesis, the radiation of ultra-high-frequency (UHF) signals emitted from transformers’partial discharge is studied theoretically. A two-wire Archimedean planar spiral antenna is designed, the characteristic of the antenna is measured in laboratory, which proves that the capability of the antenna is good. A software measuring system for transformer partial discharge based on LabVIEW p...

The corona discharge on conductors should be considered when designing transmission lines, scholars at home and abroad generally think that corona onset voltage of conductor will be lower in a rainy day, but it isn’t reported formally that to what extent corona onset voltage decline; As pollution adhering to conductor can form tips distorting electric field around conductor, corona onset vo...

The paper adopts the integrate method of theory and project experience, go deep into the research of grounding issue of the design f great hydropower plant (HPP).Because of the important statues of the grounding system for the design of great hydropower plant (HPP), especially to lower the value of grounding resistance in high-soil-resistance area not only play an extremely important roles for...

Currently, cross linked pollythene power calbe is used more and more extensively on net, its voltage grade is much higher and that its breakdown is also increase .On the basis of the method of on-line PD monitoring and XLPE fault detection and theory connecting with experiment ,this paper studies gray image of PD signal created by XLPE cable ,calculates fractal characteristic number and recogn...

In this paper influence of grounded pattern on power system is synthetically analyzed. The basic characteristics of three kinds of grounded pattern (ungrounded,grounded through a small resistance,resonant grounded) currently used in medium voltage network are analyzed and simulated with the graphics simulating software MATLAB. The modules in the SimPowerSystems toolbox of MATLAB are used to bu...

In this thesis, firstly the importance of developing on-line insulation monitoring and the actuality and the development trend of this project in the world is narrated. Then the main job of this thesis and the existing problem of on-line …

The neutral ineffectively grounded system represents a typical scheme in the 60kV and the following power distribution networks for our country. If a single-phase-to-earth fault happened, the advantages of this kind of system are the symmetrical line voltage and small fault current, so it may not probably excise the fault immediately and enhance the power supply reliability. However, in order...