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Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation

A technology of flywheel energy storage and receiving power grid, which is applied to electrical components, circuit devices, AC network circuits, etc., to achieve the effects of improving life, reducing the number of operations, and ensuring economical operation

Active Publication Date: 2020-12-01
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when there is a large-frequency disturbance in the power grid, how to economically and effectively restore the full capacity state after the flywheel energy storage device releases energy is a practical problem that needs to be researched and realized.

Method used

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  • Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation
  • Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation

Examples

Experimental program
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Effect test

Embodiment 1

[0066] Such as figure 1 As shown, Embodiment 1 of the present invention provides a flywheel energy storage frequency modulation system for the power grid at the receiving end based on frequency disturbance complementarity. The system includes:

[0067] The first calculation module is used to calculate the remaining power SOC of the flywheel energy storage device FES When it is less than 100%, combined with the rated capacity H of the flywheel energy storage device FES-N Real-time calculation of the required charging capacity H of the flywheel energy storage device FES-C .

[0068] The second calculation module is used to change the integral power H of the real-time computer group according to the frequency fluctuation of the receiving end power grid PFC .

[0069] The frequency modulation control module is used to adjust the charging capacity H according to the frequency disturbance of the power grid at the receiving end. FES-C and need to change the integral power H PFC...

Embodiment 2

[0087] Such as figure 2 As shown, Embodiment 2 of the present invention provides a frequency-disturbance complementary flywheel energy storage frequency modulation control method for the receiving end power grid, which combines the frequency disturbance of the grid with the energy management of the flywheel energy storage device, rationally allocates energy distribution, and ensures that the flywheel energy storage It can operate safely, economically and stably with the integrated frequency modulation system of the unit.

[0088] Depend on figure 1 As can be seen, the method in this embodiment 2 includes the following processes:

[0089] S1: Monitor the SOC of the flywheel energy storage device through the first judging unit FES Is it less than 100%.

[0090] S2: When the first judging unit monitors the SOC of the flywheel energy storage device FES When it is less than 100%, the required charging capacity calculation unit is based on the rated capacity H of the flywheel e...

Embodiment 3

[0106] Embodiment 3 of the present invention provides a computer device, including a memory and a processor, the processor and the memory communicate with each other, the memory stores program instructions executable by the processor, and the processor calls the The above-mentioned program instruction executes the flywheel energy storage frequency modulation control method based on the frequency disturbance complementation of the power grid at the receiving end, and the method includes:

[0107] S1: Monitoring the SOC of the flywheel energy storage device FES Is it less than 100%;

[0108] S2: According to the rated capacity H of the flywheel energy storage device FES-N and SOC FES , to calculate the required charging capacity H of the flywheel energy storage device in real time FES-C ;

[0109] S3: Monitor grid frequency fluctuations, real-time computer group frequency disturbances need to reduce integral power H PFC-D Or need to increase the integral power H PFC-I ;

...

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Abstract

The invention provides a receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation and belongs to the technical field of receiving-end power grid energy storage frequency modulation control. The method comprises the following steps that: when it is judged that the remaining electric quantity SOCFES of a flywheel energy storage device is smaller than 100%, the required charging capacity HFES-C of the flywheel energy storage device is calculated in real time on the basis of the rated capacity HFES-N of the flywheel energy storage device; according to the frequency fluctuation of a receiving-end power grid, an integral electric quantity HPFC needing to be changed of a unit is calculated in real time; and flywheel energy storage frequency modulation control is performed according to the frequency disturbance condition of the receiving-end power grid, the required charging capacity HFES-C and the integral electricquantity HPFC needing to be changed. According to the method and system of the invention, different frequency modulation control modes are adopted for the flywheel energy storage device and the unit according to different power grid frequency disturbances; the actions of the unit at high frequency are reduced, the service life of equipment such as a unit valve is prolonged; rapid primary frequencymodulation can be achieved through the flywheel energy storage device, flywheel energy storage and economic operation of the comprehensive frequency modulation system of the unit are ensured, and flywheel energy storage and stable operation of the comprehensive frequency modulation system of the unit are achieved.

Description

technical field [0001] The invention relates to the technical field of energy storage frequency modulation control of a receiving end power grid, in particular to a flywheel energy storage frequency modulation method and system for a receiving end power grid based on frequency disturbance complementation. Background technique [0002] Frequency is one of the most important quality indicators in the grid. For the power grid, frequency stability is achieved by the dynamic balance of power load and power generation. The change of system frequency directly reflects the balance of power supply and demand. The power generation is greater than the load consumption, the system frequency increases, the load consumption is greater than the power generation, and the system frequency decreases. When the power system is running, the frequency of the power grid must be controlled within an allowable range around 50Hz, that is, the premise of the stable operation of the power system is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/30
CPCH02J3/30H02J3/241Y02E60/16
Inventor 李军姚常青高嵩路宽于庆彬颜庆刘恩仁李元元
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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