The Prospects for Development of Renewable Power Engineering and Providing Electrical Safety and Electromagnetic Compatibility

摘要

The prospects of the development of renewable power and the creation and implementation of fundamentally new technologies of electric and electronic equipment in order to improve the power supply, to improve energy conservation and efficiency, and to provide electrical safety and the electromagnetic compatibility are discussed. According to research results, the efficiency of the traction power supply system can be improved by increasing the rated voltage in a dc traction network up to 24 kV. The increased voltage results in higher railroad traffic and carrying capacities and allows energy losses throughout the whole system to be reduced. It is shown by analysis and simulation of electromagnetic processes and by comparison of technical and economic characteristics of converters that 24-pulse rectifier circuits with a series connection of three-phase bridges are the most effective for the aforementioned system. Such rectifiers improve the power quality both in the primary power-supply system and in the traction network. They also allow one to use simpler and more efficient active-passive smoothing filters, which provide electromagnetic compatibility of the new dc traction power supply system with communication devices and railroad automatic machinery.