Reactive power distribution and control method of battery energy-storage power station

A technology of power distribution and battery energy storage, which is applied in the direction of reactive power adjustment/elimination/compensation, reactive power compensation, etc., can solve the problem that it is difficult to make full use of the active and reactive power of the battery energy storage power station and affect the efficiency of the battery energy storage power station , safety, stable operation, and the inability to optimize the reactive power of energy storage converters, etc., to achieve the effect of optimizing real-time distribution

Active Publication Date: 2014-12-31
STATE GRID CORP OF CHINA +3
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Problems solved by technology

If the reactive power of each energy storage converter in the battery energy storage power station cannot be optimally controlled, it will be difficult to make full use of the active and reactive power of the battery energy storage power station, which will affect the efficient, safe and stable operation of the battery energy storage power station

Method used

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  • Reactive power distribution and control method of battery energy-storage power station
  • Reactive power distribution and control method of battery energy-storage power station

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Embodiment Construction

[0027] The control method of the present invention can be applied to the reactive power coordinated control and management of large-scale battery energy storage power stations or multi-type energy storage power stations containing lithium batteries, flow batteries, supercapacitors, sodium-sulfur batteries and other energy storage systems, as follows Taking a large-scale battery energy storage power station as an example, the control method of the present invention will be further described in detail in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, the battery energy storage power station includes a bidirectional converter and a plurality of battery energy storage units, and the start and stop control of the battery energy storage unit and the charge and discharge power command can be executed through the bidirectional converter.

[0029] Such as figure 2 Shown is the flowchart of reactive power distribution and control and management algorit...

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Abstract

Disclosed in the invention is a reactive power distribution and control method of a battery energy-storage power station. The method comprises the following steps: obtaining a current total reactive power required value of a battery energy-storage power station and related data of all energy storage sets in the battery energy-storage power station, and calculating current maximum allowable reactive power characteristic values of all energy storage sets; and with the current maximum allowable reactive power characteristic values, controllable state values, maximum available apparent powers, rated powers, active powers, and maximum allowable active powers and the like as constraint conditions, reactive power coordination control inside the energy-storage power station is carried out by using reasonable control of reactive power total demands of all energy storage sets as the control objective. According to the invention, the current maximum allowable reactive power characteristic values of the energy storage converters are taken into consideration in the control strategy; and on the basis of the strategy, reactive power distribution of all energy storage converters in the energy-storage power station is optimized.

Description

technical field [0001] The invention belongs to the technical field of smart grid and energy storage and conversion, and in particular relates to a real-time reactive power distribution method of a battery energy storage power station, and is especially suitable for a reactive power control method of a megawatt-scale large-scale battery energy storage power station. Background technique [0002] The National Wind-Storage Storage and Transmission Demonstration Project is the first batch of pilot projects of the State Grid Corporation of China to build a strong and smart grid. It is the world's largest comprehensive renewable energy demonstration project integrating wind power, photovoltaic power generation, energy storage and power transmission projects. Among them, the national wind power storage and transmission demonstration project (phase I) plans to build 100MW of wind power, 40MW of photovoltaic power generation and 20MW of energy storage devices (including 14MW lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 李相俊惠东徐明贾学翠许守平
Owner STATE GRID CORP OF CHINA
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