The project of 500kV Leshan substations is very important in power system in Sichuan province in China. Because 500KV substations are the load-center substation in the whole electric network, Once these load-center substations are damaged by lightning stroke, safe operation of large electric network and main electric network would not be insured. So reliable measures against lightning stroke ...

As an application technology based on experiment ,high voltage technology , which focused on various high voltage and media ,adopted high voltage measurement equipment to testify the physical phenomenon of media under high voltage .High voltage technology has a far reaching influence on the development of power industry ,electrical manufacture and modern physics. As an aspect of high voltage ...

In the course of using ploymer insulating material, the dust, raindrops and impuritiesin atmosphere will adhere to the surface. This phenomenon causes the insulatingability of surface of material to drop and discharge repeatedly. Going on withdischarging, the conductive marks of charcoal will present. The appearance of themarks can reduce the superficial conductive ability. While the materials...

Ferroresonance is an over-voltages always occurs in neutral isolated distribution, and sometimes occurs in high-voltages network. Aim at the 110Kv network, the real network is simulated, analyzed and compared in this paper. Finally, the approach of trapezium is selected as one of the best methods. To the neutral grounded system, this paper combines the arithmetic theory and the power model, se...

Because of the appearance of the high temperature superconductor (HTS), the superconducting technology is developing quickly, and the practicability of the superconducting devices is stronger and stronger. However, that brings a very important problem—quench, and the quench protection ensures the safety and stabilization of the superconducting power system effectively. So, the research to t...

Partial discharge(PD)is one of the important reasons causing power transformer insulation degradation and breakdown. It is meaningful to detect and diagnose partial discharge in power transformer. Based on microwave and antenna theory, electrical measurement and electromagnetic theory, the ultra-high frequency(UHF)method used in power transformer for PD detection was studied in this paper.A s...

Since there has no function of dealing with single-phase earth fault in feeder automation by now, we should do some research on this problem. Looking back this problem based on feeder automation, condition and requirement have changed obviously.The scheme for single-phase fault ,which advanced by this paper, absorb the idea of selecting fault line by computer. It combines feeder automation, an...

All kind of aviation tie-in, electrical outlet, electrical magnet, electrical clutch and complicated cable system have been abroad applied in every work of life in civil economy. According to the standard regulation, there have some important significance in detecting and eliminating hitch the insulation and the withstanding voltage capability of product. The paper will introduce a new multi-c...

This Master degree thesis,based on the observing of developing actuality of on-site electrical apparatus monitoring technology,aims at overcoming the problems existing in former on-site monitoring system,such as unable to realize multiple channels sampling and hold,unable to carry out multiple channel programmable magnification,unable to monitor frequency,low pick up bits,external ROM low spee...

Measuring of lightning parameters is the base work of lightning research. It is very important for researching the lightning characteristics, analyzing the accident of lightning, identifying the responsibility of lightning strike outage accident and discussing the strategies of lightning protection. It also can provide precise original data for designing insulation co-ordination. The max light...