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Hierarchical control method for echelon utilization energy storage system and related device

A technology of energy storage system and hierarchical control, which is applied in the direction of circuit devices, transportation and packaging, battery circuit devices, etc., can solve the problems of different decommissioning states of decommissioned power batteries, poor performance of battery packs, inconsistency of decommissioned power batteries, etc. Achieve the effect of improving energy utilization and reducing consistency

Active Publication Date: 2020-09-15
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0003] However, due to the different decommissioning states of decommissioned power batteries, that is, there is inconsistency among decommissioned power batteries, which leads to obvious "short board effect" of battery packs in energy storage systems and poor performance of battery packs.
Therefore, it is still difficult to use the energy storage system composed of decommissioned power batteries in the power grid

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  • Hierarchical control method for echelon utilization energy storage system and related device
  • Hierarchical control method for echelon utilization energy storage system and related device
  • Hierarchical control method for echelon utilization energy storage system and related device

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[0099] The above is the first embodiment of a hierarchical control method for a cascade utilization energy storage system provided by the embodiment of the present application, and the following is the second implementation of a hierarchical control method for a cascade utilization energy storage system provided by the embodiment of the present application example.

[0100] see Figure 5 , a schematic flow chart of a second embodiment of a hierarchical control method for cascaded energy storage systems in the embodiment of the present application, including:

[0101] Step 501, acquire the command power of the grid.

[0102] Step 502. Obtain the first access current for the DC-DC converter to access the power grid.

[0103] Step 503: Establish a state space model corresponding to each battery power module through the ampere-hour integration method, using the battery SOC parameters and battery internal resistance r of each battery power module as state variables, the terminal ...

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Abstract

The invention discloses a hierarchical control method for an echelon utilization energy storage system and a related device, and the method comprises the steps of obtaining the instruction power of apower grid, the battery parameters of all battery power modules, and the first access current of a DC-DC converter connected to the power grid, wherein the battery parameters comprise an SOH parameterand an SOC parameter; calculating a second access current corresponding to each battery power module according to the instruction power and each battery parameter; and based on the first access current and each second access current, according to the droop control strategy and the current closed-loop control strategy, adjusting the duty ratio of the DC-DC converter in each battery power module soas to control each battery power module. The technical problem that an existing energy storage system composed of retired power batteries used in a power grid is difficult to realize is solved.

Description

technical field [0001] The present application relates to the technical field of energy storage applications, and in particular to a layered control method and related devices for cascade utilization energy storage systems. Background technique [0002] With the rapid development of the new energy vehicle industry, new energy vehicles are of great significance to alleviate the pressure on energy and the environment. At the same time, a series of problems caused by power batteries in new energy vehicles have also attracted widespread attention. Among them, the decommissioning of power batteries Disposal problems are particularly pronounced. The recycling of decommissioned power batteries is a relatively healthy and environmentally friendly disposal method. Decommissioned power batteries can be used in energy storage systems after re-inspection, analysis and management, and group matching. They are especially suitable for small-scale decentralized energy storage systems. They...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J7/00
CPCH02J3/32H02J7/0063H02J7/007
Inventor 孟金岭郑耀东赵伟梁崇淦易斌雷博罗敏邓凯
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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