Hybrid direct-current power supply device for transformer substation

Abstract

The invention discloses a hybrid direct-current power supply device for a transformer substation, which is characterized in that a storage battery pack of the hybrid direct-current power supply is a common battery pack (4) formed by connecting a counter current assembly (41) and a power storage assembly (42), the input end of the common battery pack (4) is electrically connected with the output end of a charging component (6), the output end of the common battery pack (4) is electrically connected with a communication power supply (2), the input end of the charging component (6) is electrically connected with an alternating-current power supply (ABC), the output end of the charging component (6) is electrically connected with the input end of the common battery pack (4), the output end ofa current transforming component (7) formed by a rectifying assembly and a direct current boosting assembly is electrically connected with an electric power operation power supply (1), the input end of the rectifying assembly is electrically connected with the alternating-current power supply (ABC), and the input end of the direct current boosting assembly is electrically connected with the outputend of the common battery pack (4). The hybrid direct-current power supply device is simple in structure, convenient to operate and maintain and extremely easy to be widely and commercially applied to various power plants and transformer substations in China to serve as a control power supply for popularization and application.

Description

technical field [0001] The invention relates to a direct current power supply device, in particular to a hybrid direct current power supply device for a substation. Background technique [0002] In various power plants and substations in my country, the power supply for control, signal, protection, automatic device and some operating actuators is usually called control power supply, which is divided into two categories: one is DC power supply, and the other is AC power supply. power supply. Because the DC power supply is independent of the AC power supply system and is not affected by the accidents of the AC power supply system, it has the characteristics of safety, reliability, and convenient operation and maintenance, and has been widely used. [0003] At present, the DC power supply of the substation is divided into 220 / 110V electric operation power supply and 48V communication power supply. The equipment that constitutes these two power sources is composed of four parts...

AI Technical Summary

Problems solved by technology

Although this kind of parallel DC power supply can solve the problem of abnormal function of the entire battery pack caused by the damage of a single battery, it also has shortcomings. The number of battery modules with intelligent monitoring and charging functions needs to match the number of batteries. Since the price of a single battery module is much higher than the price of a single battery, the manufacturing cost of the entire DC power supply has increased a lot, which is not economical. ;Secondly, the battery module with both charging and boosting functions is a high-power device that needs to be upgraded from 12V to 220 / 110V. Such a large number of battery modules will also bring new difficulties to the installation of the screen

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