Direct-current power supply cabinet

Abstract

The invention discloses a direct-current power supply cabinet, and the cabinet comprises a cabinet, an AC-DC converter, an alternating-current input air switch, a direct-current output air switch and a current monitoring control unit; the AC-DC converter is connected with an external AC power supply through the AC input air switch, and the DC output end of the AC-DC converter is connected with the DC output air switch; the direct current output end of the AC-DC converter is connected with a positive electrode line, a negative electrode line and a neutral point line, and the neutral point line is grounded; the current monitoring control unit is installed between the DC output end of the AC-DC converter and the DC output air switch. The current monitoring control unit comprises a controller, a current sensor and a circuit breaker connected to a direct current output line of the AC-DC converter; the current sensor collects current and leakage current of the DC output end of the AC-DC converter and transmits the current and the leakage current to the controller, and the controller controls on-off switching of the circuit breaker according to received signals. The system has the characteristics of high reliability and high power density, can directly carry out stable direct current power supply on the load, and reduces the line loss.

Description

technical field [0001] The invention relates to the technical field of electric power automation equipment, in particular to a DC power supply cabinet with high reliability and high power density suitable for outdoors. Background technique [0002] With the development and wide application of new energy, new materials, and power electronics technology, DC equipment such as distributed new energy, energy storage, and electric vehicles are gradually popularized. However, most of the current distribution networks use AC power supply. The medium load side needs to be equipped with converter equipment to convert AC to DC for normal use, and the energy consumption and operating costs are relatively high. Contents of the invention [0003] The purpose of the present invention is to provide a DC power supply cabinet suitable for outdoors, which has the characteristics of high reliability and high power density, and can directly provide stable DC power supply to loads. [0004] Th...

AI Technical Summary

Problems solved by technology

[0002] With the development and wide application of new energy, new materials, and power electronics technology, DC equipment such as distributed new energy, energy storage, and electric vehicles are gradually popularized. However, most of the current distribution networks use AC power supply. The medium load side needs to be equipped with converter equipment to convert AC to DC for normal use, and the energy consumption and operating costs are high

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