A direct current energizing method

Abstract

The invention relates to a direct current energizing method. The following steps are adopted: in a traditional direct current power supply system composed of a three-phase alternating current synchronous generator, and / or a three-phase transformer, and a three-phase rectifier, a alternating current synchronous generator of more than three phases and a rectifier which is matched with the alternating current synchronous generator in terms of a same phase number are adopted to carry out replacement and combine into an energy saving type direct current system. Through the adoption of the method of the invention, a line voltage loss of 15.8% at most in an existing three-phase power system can be reduced and even eliminated in theory, so that as for the apparatus adopting the method, the direct current voltage of the apparatus is higher than the direct current voltage of a traditional set of three-phase alternating current power generating added with the rectifier. According to the direct current energizing method, the system output power has a gain of a same degree, and the direct current power output by the rectifier is at least 10% higher than the direct current power output by the traditional rectifier. An electrical loss reduction value of the synchronous generator or the transformer is no less than 5%; therefore, the set is advantageous by being highly efficient and energy saving. An added cost proportion of the set is less than power and efficiency growing rate, and substantial technical progress and good economic benefits are achieved.

Description

Technical field: [0001] The method of the invention belongs to the field of power generation, power transmission and power transformation, and relates to a generator, a transformer and a rectifier, and specifically relates to a method for generating power by a synchronous generator, or adding a transformer for voltage transformation, and then obtaining direct current energy through a rectifier. Background technique: [0002] The DC power supply in today's applications basically no longer uses a DC generator, but instead uses a synchronous AC generator, which is then converted into DC power through a rectifier. Taking power from the grid is actually equivalent to taking power from a large AC generator. Electricity. Regardless of whether it is a large, medium or small unit, the star connection method of the AC three-phase synchronous generator and the line voltage output are usually connected to the three-phase bridge rectifier to rectify the AC power into DC power for applica...

AI Technical Summary

Problems solved by technology

[0003] That is to say, the current three-phase synchronous generator and three-phase grid system have a congenital defect in the process of direct current application - line voltage loss

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