Power grid primary frequency modulation-oriented battery energy storage system control strategy

A technology of battery energy storage system and control strategy, which is applied in the direction of flexible AC power transmission system, electrical components, circuit devices, etc., can solve problems that have not been discussed in depth, achieve fine management, reduce aging attenuation rate, and ensure two-way adjustment margin degree of effect

Inactive Publication Date: 2018-05-18
DALIAN UNIV OF TECH
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Problems solved by technology

Large-scale battery energy storage frequency modulation demonstration projects at home and abroad are actively being carried out, but the control strate

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  • Power grid primary frequency modulation-oriented battery energy storage system control strategy
  • Power grid primary frequency modulation-oriented battery energy storage system control strategy
  • Power grid primary frequency modulation-oriented battery energy storage system control strategy

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[0025] In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely in conjunction with the drawings in the embodiments of the present invention:

[0026] Such as Figure 1-Figure 3 A control strategy for a battery energy storage system oriented to primary frequency regulation of the grid is shown, including a control architecture for energy storage to participate in primary frequency regulation of the grid, calculation of frequency regulation requirements of the grid for BESS, and a control strategy for refined management of energy storage battery SOC. It includes the following steps:

[0027] 1. The control architecture of energy storage participating in the primary frequency modulation of the power grid

[0028] (1) The control architecture of BESS participating in the primary frequency modulation of the power grid is as follows: figure ...

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Abstract

The invention discloses a power grid primary frequency modulation-oriented battery energy storage system control strategy, including the following steps: S1, establishing a control framework of a battery energy storage system participating in power grid primary frequency modulation: an energy storage battery is accessed to an electric power system common connecting point through a converter and atransformer to respond to frequency fluctuation when disturbance occurs in the power grid; S2, calculating a frequency modulation requirement of the battery energy storage system; and S3, designing acontrol strategy of fine management of the SOC of the energy storage battery: a power control strategy of the battery energy storage system is designed on the basis of meeting the power grid frequencymodulation requirement, the SOC of the energy storage battery is divided into a forbidden area, an operation area and a standby area, through collection of power grid frequency f(t) and an energy storage battery SOC value [delta]<SOC>(t) in real time, a control mode of the battery energy storage system in a t time period is determined, and based on required power P<order>(t), actual charging anddischarging power P<act>(t) is determined.

Description

technical field [0001] The invention relates to the technical field of power grid control, in particular to a control strategy for a battery energy storage system oriented to primary frequency regulation of the power grid. Background technique [0002] With the shortage of fossil energy and environmental pollution problems represented by smog becoming more and more serious, it is imminent to save energy, reduce emissions, and vigorously develop clean energy. The increasing proportion of renewable energy in terms of capacity has squeezed the power generation space of conventional thermal power units, resulting in a reduction in the number of conventional units connected to the grid, resulting in a decrease in the primary frequency regulation capability of the system. On the other hand, it is the reduced primary frequency modulation performance that is quite satisfactory under slight frequency fluctuations, but its control performance problems are highlighted in the case of se...

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Application Information

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IPC IPC(8): H02J3/24H02J3/00
CPCH02J3/008H02J3/24Y02E40/10
Inventor 李卫东温可瑞晋萃萃刘柳申家锴
Owner DALIAN UNIV OF TECH
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