Management and control method and device of low-voltage IT power supply and consumption system

Abstract

The invention discloses a management and control method of a low-voltage IT power supply and consumption system. The management and control method comprises the following steps: monitoring the voltageof each phase line to ground and the voltage of a neutral point to ground, and judging whether phase line grounding or neutral point grounding occurs or not according to the voltage of each phase line to ground and the voltage to ground of the neutral point; and if phase line grounding or neutral point grounding occurs, switching on a corresponding grounding action device at a power supply side,and enabling the phase line or the neutral point which is grounded to be short-circuited to the ground in order to make leakage current flow into the ground through the grounding action device. According to the method, when the load side grounding leakage current of the safety power supply exceeds the safety current, the current of the grounding point is limited, so that personal injury, electrical fire and the like are avoided. The invention further discloses a management and control device and system of the low-voltage IT power supply and consumption system, and a computer readable storage medium, which all have the above technical effects.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method for managing and controlling a low-voltage IT power supply system; it also relates to a management and control device, system, and computer-readable storage medium for a low-voltage IT power supply system. Background technique [0002] The low-voltage IT power supply system is a low-voltage power supply system with an ungrounded central point, including two types of IT systems with neutral point lead-out and neutral point lead-out. Because the neutral point is not grounded, when the phase line is grounded, there will be no short-circuit tripping, and the grounding current is very small, so it can continue to supply power, so it is widely used in occasions that require high safety for power supply and use, such as underground coal mines, Hospitals, high-speed rail, etc. For IT power supply systems with small power supply capacity and small power supply ...

AI Technical Summary

Problems solved by technology

However, in practical applications, it may still happen that the load-side ground leakage current of the safe power supply exceeds the safe current

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