Storage battery pack with automatic capacity verifying function and used for power substation

Abstract

The invention relates to a storage battery pack with an automatic capacity verifying function and used for a power substation. The storage battery pack comprises a plurality of storage batteries, an energy-feedback electronic load and a capacity verifying unit. The capacity verifying unit comprises a variable resistance box, a control switch, a plurality of voltage detecting modules, a current detecting module, a controller and a power module, wherein the variable resistance box is serially connected with the storage batteries to form a capacity verifying loop, the control switch is used for controlling the storage batteries to connect or disconnect with the capacity verifying loop, the voltage detecting modules are used for detecting terminal voltage of the storage batteries respectively, the current detecting module is used for detecting a current value of the capacity verifying loop, and the controller is used for controlling and regulating a value of interposing resistance of the variable resistance box, controlling the storage batteries to connect or disconnect with the capacity verifying loop, recoding various parameters in a capacity verifying process and calculating the capacity of the storage battery pack. The storage battery pack has the advantages that the value of the interposing resistance in the capacity verifying loop can be regulated automatically, the capacity of the storage battery pack can be verified, low degree of worker participation during verification is realized, the resistance is regulated precisely, and a verification result is more precise and more stable.

Description

technical field [0001] The invention belongs to the field of electrical equipment, and in particular relates to a battery pack used in a substation and a nuclear capacity method adopted by the battery pack. Background technique [0002] The battery pack plays an extremely important role in the system as a backup power source for the substation. In the event of an AC power failure or other accidents, the battery pack is the only energy supplier for the load. Once a problem occurs, the power supply system will be paralyzed and the equipment will be shut down. and other major operating accidents. The battery pack is normally in the state of floating charging, and long-term floating charging will cause the plates to vulcanize, lose water, etc., resulting in performance degradation. Battery nuclear capacity test is the most accurate and authoritative method to judge battery performance. The operating regulations stipulate that DC battery packs that have been in operation for mo...

AI Technical Summary

Problems solved by technology

Field application results show that although the electronic load discharge technology solution based on power electronics technology has the advantages of low manual participation and low labor intensity, it cannot be strictly implemented due to the high-frequency switching electronic loads that will generate harmonics and peaks during the discharge process. The traditional pure resistance discharge technology needs to manually adjust the loop resistance value to maintain a constant DC discharge. The degree of manual participation is high and the control accuracy is poor, but its biggest advantage is that there is no harmonic discharge during the discharge process. waves and current spikes, the theoretical data is more reliable

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