Transformer substation direct current bus type distributed parallel direct current power supply system with prefabricated cabin

Abstract

The invention discloses a transformer substation direct current bus type distributed parallel direct current power supply system with a prefabricated cabin, which comprises a transformer substation power supply unit, a 220KV prefabricated cabin unit, a 110KV prefabricated cabin unit and a secondary equipment room unit. The 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are electrically connected with the transformer substation power supply unit; the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are respectively and electrically connected with the secondary equipment room unit, each of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit comprises a parallel storage battery module and a high-frequency switch module, the application of the parallel intelligent power supply system develops a brand-new direct current system, the system can automatically realize online capacity checking maintenance of a battery pack. Life cycle management is realized, a very good effect can be generated in practical application, the service life of the storage battery can be greatly prolonged, the utilization rate of the old storage battery can be improved, and the safety performance of the direct-current power storage system in a whole substation power system is greatly improved.

Description

technical field [0001] The invention relates to the technical field of DC power supply systems, in particular to a substation DC bus type distributed parallel DC power supply system with a prefabricated cabin. Background technique [0002] The substation refers to the place where the voltage and current are transformed, received and distributed in the power system. The substation in the power plant is a step-up substation. Its function is to boost the power generated by the generator and feed it to the high-voltage power grid. In the entire substation system, it contains various complex and dangerous small units and systems at all levels, including the DC battery system, which is a device for storing DC energy, which can convert electrical energy into chemical energy. Store it (charging), and then convert chemical energy into electrical energy (discharging) when using it, and supply it to a DC load. This energy conversion process is reversible. [0003] In the entire substa...

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Problems solved by technology

[0003] In the entire substation power system, the DC battery system is the final guarantee for the reliability of the power supply of secondary equipment such as substation power system protection. Its reliability is related to the power supply safety of the entire power system. Currently, the DC battery system currently used uses batteries connected in series. In the way of series connection, a single failure of the battery will affect the overall power output. If the battery is partially damaged, the entire battery pack will be scrapped, and there are defects such as the failure of online nuclear capacity of the battery. stability and safety, it is necessary to advance and optimize the DC battery system in the power system of the substation

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