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Method and device for controlling state of charge balance of energy storage unit in DC power distribution system

A technology of energy storage unit and DC power distribution, which is applied in the direction of load balance, electrical components, and secondary battery charging/discharging in the DC network, which can solve problems such as unbalanced state of charge, maintain stable operation, and improve use The effect of longevity

Active Publication Date: 2022-02-01
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0004] The invention provides a method and device for controlling the state of charge balance of an energy storage unit in a DC power distribution system. Guarantee the stability of the DC power distribution system

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  • Method and device for controlling state of charge balance of energy storage unit in DC power distribution system
  • Method and device for controlling state of charge balance of energy storage unit in DC power distribution system
  • Method and device for controlling state of charge balance of energy storage unit in DC power distribution system

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Embodiment Construction

[0050] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] The present invention provides a DC power distribution system energy storage unit state of charge balance control method, such as figure 1 As shown, the method includes:

[0052] adjusting the droop coefficient of the energy storage unit in the DC power distribution system according to the state of charge of the energy storage unit in the DC power distribution system;

[0053] The charging and discharging power of the energy storage unit in the DC power distribution system is adjusted according to the droop coefficient of the energy storage unit in the DC power distribution system.

[0054] Specifically, adjusting the droop coefficient of the energy storage unit in the DC power distribution system according to the state of charge of the energy storage unit in the DC power distribution system includes:

[0055] When the ...

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Abstract

A DC power distribution system energy storage unit charge state balance control method and device, the control method and device are suitable for the energy storage unit in the DC power distribution system; the method includes the energy storage unit in the DC power distribution system When the state of charge is unbalanced, adjust the droop coefficient of the energy storage unit in the DC power distribution system according to the state of charge of the energy storage unit in the DC power distribution system, and further adjust the DC power distribution system according to the droop coefficient The charging and discharging power of the energy storage unit in the system. The control method and device provided by the present invention can control the charging and discharging power of the energy storage system by adjusting the droop coefficient of the energy storage unit, and can effectively realize the rapid balance of multiple energy storage units in the DC power distribution system.

Description

technical field [0001] The invention relates to the field of energy storage control of electric power systems, in particular to a method and device for controlling the state of charge balance of an energy storage unit of a DC power distribution system. Background technique [0002] The DC power distribution system is flexible and controllable, and can avoid problems such as reactive power circulation, phase synchronization, and power angle stability. It is suitable for new energy power generation networking; For system power balance, the DC power distribution system needs to introduce energy storage units. [0003] Due to the differences in the energy storage units themselves and their respective operating processes, the state of charge of different energy storage battery units is not the same, and the unbalanced state of charge of the energy storage units will lead to overcharge and overdischarge of the energy storage units, etc. It will shorten the service life of the ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/14H01M10/44
CPCH01M10/441H02J1/14Y02E60/10
Inventor 范士雄刘幸蔚吴斌单来支卫泽晨王庆王琛高运兴王毅韩巍王伟
Owner CHINA ELECTRIC POWER RES INST
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