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Control method for battery energy storage system participating in primary frequency modulation of power grid

A technology of a battery energy storage system and a control method, which is applied in flexible AC transmission systems, photovoltaic power generation, electrical components, etc., can solve the problems of no inertia of the power grid and aggravate the pressure of frequency regulation of the power grid, so as to prevent further deterioration and reduce storage capacity. The effect of capacity allocation and increased recovery rate

Active Publication Date: 2020-09-01
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Problems solved by technology

[0002] With the depletion of fossil energy, large-scale renewable energy such as wind energy, solar energy, etc. have been applied to power generation, but intermittent power sources such as wind power and photovoltaic power generation have fluctuations and uncertainties, and most of the current intermittent power sources have no impact on the grid. show inertia
Large-scale access to renewable energy will significantly intensify the pressure on power grid frequency regulation

Method used

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  • Control method for battery energy storage system participating in primary frequency modulation of power grid
  • Control method for battery energy storage system participating in primary frequency modulation of power grid
  • Control method for battery energy storage system participating in primary frequency modulation of power grid

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[0043] In order to make the features and advantages of this patent more obvious and understandable, the following examples are specially cited in conjunction with the drawings, and detailed descriptions are as follows:

[0044] The core point of the technical solution of this embodiment is that the virtual inertia control response, virtual negative inertia response, and virtual droop control jointly participate in the primary frequency modulation of the power grid under different frequency conditions. And under different frequency conditions, the control mode adopted is different:

[0045] When the frequency is in a deteriorating working condition, the mode of virtual inertia response and virtual droop control is adopted;

[0046] When the frequency is in the recovery condition, the mode of virtual negative inertia response and virtual droop control is adopted.

[0047] Among them, the virtual droop control, virtual inertia control response, and virtual negative inertia response are c...

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Abstract

The invention provides a control method for a battery energy storage system participating in primary frequency modulation of a power grid, which adopts three frequency modulation modes, namely, virtual inertia response, virtual negative inertia response and virtual droop control, to participate in frequency modulation of the power grid according to different working conditions of the power grid. When the frequency is in a deteriorated working condition, virtual inertia response and virtual droop control are adopted to jointly participate in frequency modulation of the power grid; and when thefrequency is in the recovery working condition, virtual negative inertia response and virtual droop control are adopted to jointly participate in frequency modulation of the power grid. According to the frequency modulation control strategy, frequency deviation and frequency deviation change rate characteristics in the primary frequency modulation process are comprehensively considered, the advantages of the virtual inertia mode and the virtual droop mode are combined, comprehensive use of the three control modes at the same moment is achieved, the primary frequency modulation effect is improved, and the energy storage capacity requirement is reduced.

Description

Technical field [0001] The invention relates to the field of power system control, in particular to a control method for a battery energy storage system to participate in a primary frequency regulation of a power grid. Background technique [0002] With the depletion of fossil energy, large-scale renewable energy sources such as wind and solar are used for power generation. However, intermittent power sources such as wind power and photovoltaic power generation have volatility and uncertainty. At present, most intermittent power sources have no impact on the grid. Show inertia. Large-scale access to renewable energy sources will significantly increase the pressure on grid frequency regulation. The precise control and fast response characteristics of energy storage batteries have attracted widespread attention in participating in grid auxiliary services. [0003] The use of battery energy storage in auxiliary grid frequency modulation can give full play to its advantages of rapid ...

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Application Information

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IPC IPC(8): H02J3/24H02J3/32
CPCH02J3/241H02J3/32H02J2203/20Y02E70/30
Inventor 唐雨晨林章岁叶荣林毅温步瀛朱振山
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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