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Parameter-optimized alternating-current micro-grid energy storage SOC equalization distributed control method

A distributed control and micro-grid technology, applied in AC network load balancing, AC network circuits, electrical components, etc., can solve problems such as large resistance, inability to provide power balance and power tracking, and high degree of dependence on data collection accuracy. High stability, good SOC balance effect, and good scalability

Active Publication Date: 2021-08-20
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

However, it only realizes the balance of SOC between energy storages, and it cannot provide the functions of power balance and power tracking for the running microgrid, and there is no communication in its distributed control structure, but an improvement based on droop control. The control structure is extremely dependent on the accuracy of data collection, and does not consider the difference in parameters of the energy storage battery in the microgrid, such as different rated power, which is extremely resistant in the actual application process.

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  • Parameter-optimized alternating-current micro-grid energy storage SOC equalization distributed control method
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  • Parameter-optimized alternating-current micro-grid energy storage SOC equalization distributed control method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with drawings and embodiments.

[0028] A parameter-optimized AC microgrid energy storage SOC balance control method, the control system adopted in this method is a distributed structure, the intelligent body hardware is a controller installed on each energy storage battery, and multiple controllers jointly form a control System, control system includes: multi-agent control framework module, agent definition module, consistency parameter optimization module, iterative convergence condition module, frequency acquisition module, power calculation module, PQ control module.

[0029]The multi-agent control framework module adopts the classic basic framework of multi-agent control, including agents, communication networks, and communication methods. Among them, the agents only perform simple function calculations, data records, and communications. The communication network is the communication relationship ...

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Abstract

The invention discloses a parameter-optimized alternating-current micro-grid energy storage SOC equalization control method, which is characterized in that a distributed multi-agent system (MAS) structure and a dynamic consistency algorithm are adopted, the condition that energy storage has different rated electric quantities and different initial SOCs is considered, a power calculation method for SOC mean value estimator by utilizing bus frequency, energy storage SOC and an intelligent agent is provided, and the power balance is realized while the power balance in the micro-grid is met. Meanwhile, linear iteration is accelerated by optimizing parameter selection, so that the total communication traffic required for realizing SOC equalization is reduced, and the pressure of a communication network is reduced.

Description

technical field [0001] The invention relates to a parameter-optimized micro-grid energy storage SOC balance control strategy, which belongs to the technical field of micro-grids. Background technique [0002] As a measure to deal with the shortage of fossil fuels and environmental pollution, micro-grids have received more and more attention in recent years. However, due to the randomness and uncertainty of renewable energy output, it is easy to bring many adverse effects to the power system. , the microgrid is usually equipped with a corresponding energy storage system to work together. Battery energy storage device (BESD) is a common energy storage method for micro-grids due to its high reliability and mature technology. However, as the system continues to operate, the state of charge (SOC) of each battery There will be differences. In severe cases, some BESDs will be overcharged or quit running early due to low power, which will cause the rest of the energy storage to bea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/24
CPCH02J3/32H02J3/241
Inventor 卢开诚董树锋刘铠诚
Owner CHINA ELECTRIC POWER RES INST
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