When the energy deposited in capacitors releases in water through theelectrodes, it brings shock waves, intensely light and heat. This phenomenon is called“electro-liquid effect”. “Electro-liquid effect” is a new subject developed from 1950\\\’s.The essence of “electro-liquid effect” is the fast conversion of electricity to heat, light,pressure and acoustics. “Electro-liqui...

This paper mainly discusses how to design a high stability current control power supply for laser gyro of double anodes and common cathode in North-Finder based on Ring Laser Gyroscope. The characteristic of switching power supply and flyback converter are introduced, and the design of flyback transformer is presented, on this basis, the circuit which generates high-voltage is designed. The ci...

With the development of power system, more and more security, reliability and economyare demanded in current supply. Precise fault location technology is becoming important. It isnot only economizing manual effort but also assuring rapid supply recovery, so it does greatimportance to economic life and politics.The primary content of the paper is research on fault location methods and technolog...

The paper analyses the on-line monitoring power transformer \\\’s chromatogram of oil in the Pingliang 110kV substation and investigation the status in quo of transformer insulation monitor based on chromatogram of transformer oil. After the analysis of deflection sources in routine chromatogram of oil test, the paper brings into effect successfully the equipment on the base of character...

Overvoltage is a critical factor of that influence the security of the power system. It is due necessary to online monitoring overvoltage in power system as obtaining the waveform and characteristic parameters of overvoltage, which is very helpful in anasys accident and improve the insulation cooperation. Most of the existing overvoltage monitoring systems adopt divider to get signal. But for...

In recent years, over-voltage damages of secondary device caused attentions of more and more people. The surge protective devices(SPDs)(such as gas discharge tube、varistor、transient voltage suppression diode)is the simple measures to suppress the surge. However, these methods can’t suppress the high frequency component in the surge. Because the influence of distributed induction and dis...

Neutral ineffectively grounded modes are widely employed in medium and low voltage distribution networks of China. They can contribute to the reliability of power supply, on the other hand the diminished zero sequence currents caused by them make it hard to detect grounded line. It is an important research subject in neutral ineffectively grounded systems that detecting the ground fault accur...

The development of the center city district and the rapid growth of electricity load bring the medium and high voltage urban grids the opportunity to replace overhead lines with cables, so there must be a new substation style with cable outlets. Because the traditional protection and running modes worked with out regard to the larger and larger proportion of cable outlets, then there may be s...

The flashover of polluted insulators is the one of the key issues to threaten the safe operation of transmission line. Compared with the AC insulators, the contamination deposited on DC insulators is more and the external insulation design of DC transmission lines is more difficult. A mass of investigation of DC pollution flashover has been studied in China and the world, but there is less in...

Gas Insulated Metal Enclosed Transmission Line(GIL)with the merit of large capability,flexible layout,low impact on or of environment,can be used in those situations which the climatic environmental is formidable or the corridor is limited. However,the dielectric strength of SF_6 is extremely sensitive to the nonuniformity of the electric field,and the polarity of DC nonuniform electric field...