Buck-Boost equalization circuit topological structure and equalization control method of station lead-acid storage battery
A topology structure and balanced circuit technology, applied in the field of substations, can solve problems such as poor SOC consistency, achieve the effects of improving SOC consistency, shortening the energy balancing path, and improving the efficiency of balancing control
Pending Publication Date: 2022-04-29
STATE GRID HEBEI ELECTRIC POWER RES INST +1
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[0005] The embodiment of the present invention provides a Buck-Boost balanced circuit topology and a balanced control method for station lead-acid batteries to solve the problem of poor SOC consistency when using the Buck-Boost balanced topology for balanced control in the prior art
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[0032] In order to enable those skilled in the art to better understand this solution, the technical solution in this solution embodiment will be clearly described below in conjunction with the accompanying drawings in this solution embodiment. Obviously, the described embodiment is a part of this solution Examples, but not all examples. Based on the embodiments in this solution, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this solution.
[0033] The term "comprising" and any other variants in the description and claims of this solution and the above drawings mean "including but not limited to", and are intended to cover non-exclusive inclusion and are not limited to the examples listed herein. In addition, the terms "first" and "second", etc. are used to distinguish different objects, not to describe a specific order.
[0034] The realization of the present invention is described in...
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The invention provides a Buck-Boost equalization circuit topological structure and an equalization control method of a station lead-acid storage battery. According to the structure, a T-shaped Buck-Boost energy balance path is arranged between every two adjacent single batteries in the same battery pack; a T-shaped Buck-Boost energy balance path is arranged between each two adjacent battery packs; an H-bridge type Buck-Boost energy balance path is arranged between the head battery monomer and the tail battery monomer in the same battery pack; and an H-bridge Buck-Boost energy balance path is arranged between the head battery pack and the tail battery pack. The method comprises the following steps: constructing a plurality of fuzzy controllers; performing first-stage intra-group energy balance control on the battery monomers in all the battery packs by using a fuzzy controller; and performing second-stage inter-group energy balance control on all the battery packs. According to the invention, the energy balance path of the far-end single battery can be shortened, the SOC consistency is improved, and the energy balance control efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of substations, in particular to a Buck-Boost equalization circuit topology and an equalization control method for a lead-acid storage battery for a station. Background technique [0002] The lead-acid battery pack used for the emergency DC power supply of the power substation is generally composed of 108 lead-acid battery cells with a rated voltage of 2V connected in series. The "barrel" effect of the lead-acid battery pack causes the emergency power supply capability of the lead-acid battery pack to depend only on the battery cell with the smallest State of Charge (SOC). As a result, a large number of battery cells in the lead-acid battery pack Volume redundancy is wasted. Therefore, it is necessary to improve the SOC consistency of the battery cells in the lead-acid battery pack to improve the emergency power supply capacity of the lead-acid battery pack and avoid waste of battery cell capacity. The bal...
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IPC IPC(8): H02J7/00H02M3/158
CPCH02J7/0014H02J7/0048H02J7/00712H02M3/1582H02J2207/20
Inventor 杜旭浩李秉宇范辉庞先海姚芳李练兵郭小凡蔡子文刘杰马建辉苏肖
Owner STATE GRID HEBEI ELECTRIC POWER RES INST