240V high-voltage direct current insulation monitoring system

Abstract

The invention discloses a 240V high-voltage direct current insulation monitoring system. The system monitors turn-ground voltage of positive and negative buses in real time in an isolation mode by the adoption of the balanced and unbalanced bridge compatible test mode and measures and calculates the insulation resistance values of the buses; when bus insulation declines, an alarm signal is given, branch circuits are started for inspection, branch power resistors are put into the buses, and branch inspection instructions are sent to intelligent leak current sensors through an RS485 bus to seek a grounding branch; if the branch is provided with a grounding resistor, an intelligent direct-current leak current sensor arranged on the branch in a penetrating and sleeving mode will sense out leak current signals and report the signals, and the system can calculate out the positive and negative grounding impedance of the branch according to the collected turn-ground voltage of the buses and the leak current values collected by the branch sensors, and finishes the insulation detection such as single-end positive and negative grounding of the branches, and double-end balanced or unbalanced grounding. The 240V high-voltage direct current insulation monitoring system is mainly used for online monitoring and rapid judgment on the insulation states of a direct current source system and branches and insulation declining of a positioning system.

Description

technical field [0001] The invention relates to a 240V high voltage direct current insulation monitoring system. Background technique [0002] In the data center, after the high-voltage DC power supply system is used for power supply, the positive and negative busbars are floating. Due to the large number of DC output circuits in the system, it is inevitable that insulation damage will occur. When a single-point insulation drop fault occurs, since no short-circuit circuit is formed, the normal operation of the electrical equipment will not be affected, and the operation can still continue at this time; but if not Handle it in time. Once a two-point grounding fault occurs, the DC power supply may be short-circuited, the output fuse will be blown, and the server will stop working normally, which will seriously affect the safe operation of the equipment in the computer room; create a threat. In addition, there are many DC output circuits in the computer room. For the convenie...

AI Technical Summary

Problems solved by technology

Due to the large number of DC output circuits in the system, it is inevitable that insulation damage will occur. When a single-point insulation drop fault occurs, since no short-circuit circuit is formed, the normal operation of the electrical equipment will not be affected, and the operation can still continue at this time; but if not Handle it in time. Once a two-point grounding fault occurs, the DC power supply may be short-circuited, the output fuse will be blown, and the server will stop working normally, which will seriously affect the safe operation of the equipment in the computer room; create a threat

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