Processing system and processing method for dealing with line electric leakage in direct current lighting power supply

Abstract

The invention relates to a processing system and a processing method for dealing with line electric leakage in direct current lighting power supply, the processing system for dealing with line electric leakage in a direct current lighting power supply system is composed of a direct current power supply cabinet, a power supply cable, a DC-DC driver and a lamp, and the DC-DC driver converts input direct current into voltage and current required by the lamp. The DC-DC driver comprises an MCU microprocessor, and an input voltage detection circuit, a PWM conversion circuit, a PWM control circuit, an input end fault feedback circuit and an output end fault feedback control circuit which are connected with the MCU microprocessor. Because the direct current system is sensitive in protection, overload protection of the direct current system is easily caused by line leakage, and a lamp is turned off. According to the invention, the DC-DC driver detects the input voltage, the output power is adaptively adjusted, and the load change of the DC power supply cabinet is reduced by reducing the load power of the lamp when the line leaks electricity, so that the overload protection probability of the DC power supply cabinet is greatly reduced.

Description

technical field [0001] The invention relates to a highway tunnel lighting power supply system, in particular to a processing system and method for dealing with line leakage in DC lighting power supply. Background technique [0002] In the existing highway tunnel lighting, because DC power supply has the advantages of safety, energy saving, intelligence, etc., and can be easily connected to energy storage power supply systems such as photovoltaics, DC power supply has gradually become the development trend of current road tunnel lighting power supply. [0003] In DC lighting, the insulation requirements for lines are relatively high. Due to the large number of line nodes and the complex and harsh working environment, small current leakage of lines often occurs. If the insulation drops, on the one hand, there will be a risk of electric shock, on the other hand, it will also cause a waste of electricity. At the same time, due to the high sensitivity of DC system protection, po...

AI Technical Summary

Problems solved by technology

Due to the large number of line nodes and the complex and harsh working environment, small current leakage of the line often occurs

If the insulation drops, on the one hand, there will be a risk of electric shock, on the other hand, it will also cause a waste of electricity. At the same time, due to the high sensitivity of the DC system protection, poor insulation will easily cause the system protection to malfunction and cause the lights to be turned off, thus forming a traffic safety hazard.

[0004] For the line insulation problem, the current main measure is to monitor the line insulation, but this is only a means of detection and early warning, and cannot deal with the problems of increased load and system protection caused by leakage after poor insulation

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