A partition control method for a battery energy storage system
A technology of battery energy storage system and partition control, which is applied in the direction of flexible AC power transmission system, battery load switching, battery circuit device, etc., and can solve the problems of not being able to manage the battery energy storage system more finely, and not considering the factor of charge and discharge rate, etc. The control method is simple and flexible, which is conducive to popularization and prolongs the service life.
Active Publication Date: 2020-09-08
GUODIAN UNITED POWER TECH
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Problems solved by technology
However, this technology does not consider the factor of charge and discharge rate, and it cannot manage the battery energy storage system more finely
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[0026] The partition control method of the battery energy storage system of the present invention can be applied to a micro-grid, a large power grid or a battery energy storage power station containing a set of energy-type and power-type battery energy storage systems to control the battery energy storage system , so that it has both energy transfer and power emergency control functions. The following is an example of a microgrid system.
[0027] refer to figure 1 Shown is a micro-grid system with multiple distributed power sources, the micro-grid system includes a diesel power generation system 1, a battery energy storage system 2, a biomass power generation system 3, a photovoltaic power generation system 4, a wind power generation system 5, and an AC bus 6 , load 8 and microgrid central control unit 7. Among them, the diesel power generation system 1, the battery energy storage system 2, the biomass power generation system 3, the photovoltaic power generation system 4 and...
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The invention discloses a battery energy storage system zone control method comprising the following steps: setting four state of charge (SOC) nodes, and setting charge and discharge multiplying power zone control nodes; freely controlling charge and discharge states under normal outer environment conditions according to outer environment needs if the battery energy storage system SOC is located in an energy free carrying zone; emergently charging and only allowing to charge the battery according to the charge and discharge multiplying power Cmax if the SOC is located in an emergent charging zone; emergently discharging and only allowing to discharge the battery according to the charge and discharge multiplying power Cmax if the SOC is located in an emergent discharging zone; allowing the battery energy storage system to use Cemg and Cmin as the upper and lower limits and properly starts emergency power control when the outer environment is in the emergent condition, thus charging / discharging the battery between SOCmin and SOCmax; allowing the battery energy storage system to preferably provide fast charging / discharging emergency power control functions when the outer environment has large power disturbances. The method can finely manage the battery energy storage system, thus preventing frequently charging / discharging switching, improving equipment utilization rate, and providing battery economic benefits.
Description
technical field [0001] The invention relates to the technical field of microgrid electric energy distribution, in particular to a partition control method for a battery energy storage system. Background technique [0002] Existing research and practice show that microgrid is the most effective way to exert the efficiency of distributed generation energy supply system. The energy storage system is an important part of the micro-grid system, which can smooth the power output of intermittent renewable energy such as wind power and photovoltaics; it can move energy according to the output of loads and micro-power sources, so as to significantly improve the utilization rate of renewable energy; Emergency power control can be performed in the case of large disturbances in the microgrid system, which plays a very important role in the stable operation and control of the microgrid system. [0003] In recent years, large-capacity battery energy storage systems have been used more an...
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IPC IPC(8): H02J3/32H02J7/00
CPCH02J3/32H02J7/0068Y02E40/10
Inventor 褚景春袁凌许伟朱莲潘磊李强董健林明张坤
Owner GUODIAN UNITED POWER TECH