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Energy storage power station energy management method based on SOC consistency of multiple battery packs

An energy storage power station and energy management technology, applied in the field of energy storage, can solve problems such as differences, reduce switching frequency, avoid excessive charging and discharging, and improve the effect of power distribution control.

Active Publication Date: 2021-07-16
SHANDONG ELECTRICAL ENG & EQUIP GRP +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an energy storage power station capacity management method based on the SOC consistency of multiple battery packs, to solve the problem of differences in the state of charge (SOC) of each battery pack in the energy storage system after several scheduling cycles, Improving the regulation ability of battery energy storage power station

Method used

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  • Energy storage power station energy management method based on SOC consistency of multiple battery packs
  • Energy storage power station energy management method based on SOC consistency of multiple battery packs

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Embodiment 1

[0041] This embodiment discloses an energy management method for an energy storage power station based on SOC consistency of multiple battery packs, which is applied to an optical storage system. Such as figure 1 As shown, the photovoltaic power storage system includes a photovoltaic power station and an energy storage power station, and the photovoltaic power station and the energy storage power station are output after AC-DC conversion. The energy storage power station is a lithium battery. The generating power of the photovoltaic power station is 50MW, the rated power of the lithium battery energy storage system is 12.6MW, the rated capacity is 25.2MWh, and the sampling interval is ΔT=1min.

[0042]Such as figure 2 As shown, the specific steps for energy management of the optical storage system:

[0043] Step 1. Set the initial state of the energy storage system: including the rated power and rated capacity of the energy storage system, the number and capacity of batter...

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Abstract

The invention discloses an energy storage power station energy management method based on SOC consistency of multiple battery packs. The method comprises the steps: optimally distributing the power of the multiple battery packs of an energy storage power station, and adjusting the difference between the charging and discharging power distribution of the batteries and the SOC in real time through algorithm control in each scheduling period; specifically, firstly, calculating the overall output power based on an energy storage power station dispatching instruction, then, taking the SOC variance, the volatility and the battery life of each energy storage battery pack as optimization targets, taking the charging and discharging state switching times and the power distribution size of each battery pack as optimization variables, and acquiring an energy storage system control optimal solution by using a genetic algorithm; and completing SOC adjustment of the battery pack of the energy storage power station. The method can solve the problem that the charge states of the battery packs of the energy storage system are different after a plurality of scheduling periods, and improves the adjustment capability of the battery energy storage power station.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to an energy management method for an energy storage power station based on the SOC consistency of multiple battery packs. Background technique [0002] The battery energy storage system can handle a large amount of electric energy, stabilize power fluctuations, reduce the peak-to-valley load difference of the grid, and improve power supply reliability and power quality. After the battery energy storage system has been charged and discharged many times, due to the differences in parameters such as the internal resistance, polarization voltage, and capacity of each battery pack, the State of Charge (SOC) of each battery pack is inconsistent after a period of operation, which in turn affects The overall adjustment capability of the energy storage power station. [0003] At present, battery energy storage power stations generally complete the charging and discharging of electric energy a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H01M10/44H02J7/00H02J3/38
CPCH02J3/32H01M10/441H02J7/0068H02J7/00302H02J7/00306H02J3/381H02J2300/24Y02E60/10Y02E10/56Y02E40/10
Inventor 张文赋张栋王陈园傅春明李建史存伟刘振雷王永军时培征
Owner SHANDONG ELECTRICAL ENG & EQUIP GRP
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