A Protection Scheme for Low Voltage DC Distribution System Based on Control and Protection Cooperation

When a short circuit fault occurs in the DC distribution system, the fault current rises quickly and has a high amplitude, which requires high performance of the protection equipment. At present, the protection scheme of DC distribution system mainly depends on the DC circuit breaker at both ends of the line, but the DC circuit breaker technology is not mature and the cost is high. Based on the above background, a protection scheme of low-voltage DC distribution system based on control and protection cooperation is proposed. By changing the system topology and cooperating with the implementation of the protection scheme, it can meet the protection reliability and rapidity, reduce the operation cost, and quickly restore the power supply after cutting off the fault, so as to realize the short-term fault traversal. Finally, the system model is built on the Matlab/Simulink simulation platform to verify the effectiveness of the protection scheme.