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.