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Battery energy storage power station energy management method taking charge state consistency into consideration

A state of charge and battery energy storage technology, applied in battery circuit devices, charge balancing circuits, battery load switching, etc., can solve problems such as difficulty in ensuring consistency, and achieve low power consumption charging and discharging, high system efficiency, and convergence speed fast effect

Pending Publication Date: 2022-02-01
STATE GRID GASU ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] The purpose of the present invention is to propose an energy management method for battery energy storage power stations that considers the consistent state of charge, including solving the problem of the state of charge (State of Charge, SOC) of each battery pack in the energy storage system The impact of the increase in the number of battery charge and discharge cycles makes it difficult to ensure consistency; due to the "short board effect" the available capacity of the battery energy storage system will decrease, and the impact of inconsistency on the battery pack will become greater and greater as the battery pack's service time accumulates The problem

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  • Battery energy storage power station energy management method taking charge state consistency into consideration
  • Battery energy storage power station energy management method taking charge state consistency into consideration
  • Battery energy storage power station energy management method taking charge state consistency into consideration

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[0039] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] An energy management method for battery energy storage power stations that considers the consistency of state of charge. It takes SOC consistency as the objective function, utilizes the timing of power grid dispatching command power, and conducts an optimization every time period, so that the SOC can quickly converge to the vicinity of the reference value. , and make the energy storage converter more efficient; the present invention uses a greedy algorithm model to optimize the state of charge with the goal of consistency.

[0041] In the invention, the main function of the BESS used in the small photovoltaic storage...

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Abstract

The invention belongs to the technical field of intelligent power grids and energy storage and conversion, and specifically relates to a battery energy storage power station energy management method taking charge state consistency into consideration, particularly to a storage battery energy storage power station SOC control method based on a greedy algorithm. According to the method, the SOC consistency is taken as a target function, the time sequence of the power grid dispatching instruction power is utilized, and optimization is carried out once in each time period, so SOC is quickly converged to be close to a reference value, and the efficiency of an energy storage converter is higher.

Description

technical field [0001] The invention belongs to the technical field of smart grid and energy storage and conversion, and in particular relates to an energy management method of a battery energy storage power station considering the consistency of state of charge, in particular to a greedy algorithm-based SOC control method of a battery energy storage power station. Background technique [0002] The energy storage system has the ability to quickly adjust power in two directions. In recent years, with the increasing proportion of intermittent renewable energy power generation, energy storage plays a very important role in solving intermittent renewable energy power generation, load fluctuations, and improving power quality, and has become increasingly indispensable in power systems. missing link. [0003] The battery energy storage system (Battery Energy Storage System, BESS) is more and more widely used in the power system. It is difficult to guarantee the consistency due t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J3/32
CPCH02J7/0016H02J7/0068H02J3/32Y02E40/10
Inventor 王维洲吴悦韩旭杉周强张彦琪马志程马彦宏吕清泉王定美张金平李津张睿骁刘淳保承家张健美张珍珍高鹏飞刘丽娟郑翔宇刘海伟
Owner STATE GRID GASU ELECTRIC POWER RES INST