Dynamic optimization method and device for direct-current power supply storage battery pack

Abstract

The invention belongs to the technical field of direct-current power supplies, and particularly relates to a dynamic optimization method and device for a direct-current power supply storage battery pack. The method comprises the steps of collecting initial operation parameters of a storage battery; constructing an initial management control model of the direct-current power supply storage batterypack according to the collected initial operation parameters, and realizing SOC estimation according to the initial management control model; identifying the overall series-parallel connection relationship of the battery network according to the SOC estimation result and the initial management control model; realizing dynamic recombination of the battery network topology according to the overall series-parallel connection relationship of the battery network; and monitoring the storage battery pack according to the dynamically recombined battery network topology, and dynamically optimizing thesingle batteries in the storage battery pack according to the voltage change according to the monitored operating parameters of the direct-current system. According to the invention, monitoring and dynamic optimization of the direct-current power supply storage battery pack are realized; self-configuration, self-management and self-healing of a power battery grouping system are realized; the overall reliability, durability and safety of the system are improved; and the method and device are simple, efficient and highly accurate.

Description

technical field [0001] The invention belongs to the technical field of DC power supply, and in particular relates to a dynamic optimization method and device for a battery pack of DC power supply. Background technique [0002] At present, DC power supply system faults in substations mainly rely on DC circuit breakers to achieve protection, and the phenomenon of mixed use of AC and DC circuit breakers often occurs. In the case of a fault, the upper and lower circuit breakers will jump at the same time, expanding the scope of the accident; therefore, the mixed use of AC and DC circuit breakers and the unreasonable level difference coordination will bring great difficulties to the correct protection of the DC power system, and the DC circuit breaker The protection is based on the principle of thermal magnetic tripping, and its protection process is passive; in addition, the current DC system protection measures cannot realize the isolation of DC faults, and a ground fault in th...

AI Technical Summary

Problems solved by technology

[0002] At present, DC power supply system faults in substations mainly rely on DC circuit breakers to achieve protection, and the phenomenon of mixed use of AC and DC circuit breakers often occurs. In the case of a fault, the upper and lower circuit breakers will jump at the same time, expanding the scope of the accident; therefore, the mixed use of AC and DC circuit breakers and the unreasonable level difference coordination will bring great difficulties to the correct protection of the DC power system, and the DC circuit breaker The protection is based on the principle of thermal magnetic tripping, and its protection process is passive; in addition, the current DC system protection measures cannot realize the isolation of DC faults, and a ground fault in the DC system will cause a ground fault in the entire DC system, and The current circuit breaker isolation will cause the load branch with a little ground fault to lose power. How to realize the DC fault isolation without losing power to the load branch still has certain technical difficulties at present.

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