Title :
Insulation characteristics of XLPE cables and their accessories for high frequency voltage with PWM inverter
Author :
Seki, Akio ; Miyamoto, Shigeki ; Okitani, Akira ; Ohki, Y. ; Sakuma, Susumu ; Fukuyama, Seiichiro ; Miyauchi, Hideyuki
Author_Institution :
Central Japan Railway Co., Tokyo, Japan
Abstract :
A step voltage waveform is applied, by an inverter in which high frequencies are superimposed on the basic commercial frequency, to feeding cables and their accessories that supply a power source to the propulsion coils of a MAGLEV system. The authors devised electrical testing equipment that can output such PWM waveforms, and they investigated the effect such waveforms have on the insulation properties of XLPE power cables and their accessories, the breakdown characteristics of the model and long-term characteristics. As a result, it was learned that the insulation breakdown depends on the voltage waveform peak value, and that the long-term characteristics are determined by the basic frequency. This knowledge will be useful for the rational insulation design of feeding cable systems
Keywords :
cable insulation; cable testing; electric breakdown of solids; insulation testing; invertors; magnetic levitation; organic insulating materials; power cables; power supplies to apparatus; pulse width modulation; superconducting magnets; HF; MAGLEV system; PWM inverters; PWM waveforms; XLPE power cables; breakdown characteristics; cable accessories; design; electrical testing equipment; insulation characteristics; long-term characteristics; power source; propulsion coils; voltage waveform peak value; Breakdown voltage; Cable insulation; Cables; Coils; Frequency; Magnetic levitation; Power supplies; Propulsion; Pulse width modulation; Pulse width modulation inverters;
Conference_Titel :
Transmission and Distribution Conference, 1994., Proceedings of the 1994 IEEE Power Engineering Society
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1883-8
DOI :
10.1109/TDC.1994.328424
