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Fast frequency response distributed coordination control method and system forseries-parallel wind and light micro-grid

A distributed coordination, frequency response technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2021-05-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for multiple VSG power converters distributed on various wind power plants / solar photovoltaic generators in a microgrid, how to coordinate them to effectively provide enough inertia to reduce frequency interference, there is currently no solution

Method used

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  • Fast frequency response distributed coordination control method and system forseries-parallel wind and light micro-grid
  • Fast frequency response distributed coordination control method and system forseries-parallel wind and light micro-grid
  • Fast frequency response distributed coordination control method and system forseries-parallel wind and light micro-grid

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Experimental program
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Effect test

Embodiment 1

[0041] The switching on of large electric pumps and air conditioning units causes sudden changes in the load on the AC microgrid, resulting in a reduction in the frequency of the microgrid. Therefore, a power electronic converter is required to adjust the frequency back to the rated value. Such as figure 1 As shown, several distributed energy resources DER in the microgrid will be controlled 1 、DER 2 ,···,DER N .

[0042] The method provided by this embodiment is distributed cooperative control, such as figure 2 As shown, each DER is represented as nodes 1, 2, ..., i, ... N, and is executed in two steps, such as image 3 Shown:

[0043] Step 1: Calculate the total optimal power input ΔP using model predictive control (MPC) from all storage systems required to control frequency and frequency rate of change ct .

[0044] Step 2: Distribute the required total power input across all N DERs in the microgrid by: maximum rated power and state of charge at a given time.

[0...

Embodiment 2

[0077] Embodiment 2 of the present disclosure provides a fast frequency response distributed coordinated control system for a hybrid wind-solar microgrid, including:

[0078] The data acquisition module is configured to: acquire the operation status data of each distributed energy source;

[0079] The optimal total power input acquisition module is configured to: use the obtained operating state data to obtain the total optimal power input according to the model predictive control algorithm;

[0080] The distributed energy optimal power input acquisition module is configured to: distribute the total optimal power input across all distributed energy sources in the microgrid through the maximum rated power and the state of charge at a given time.

[0081] The working method of the system is the same as the distributed coordinated control method for fast frequency response of the hybrid wind-solar microgrid provided in Embodiment 1, and will not be repeated here.

Embodiment 3

[0083] Embodiment 3 of the present disclosure provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the distributed coordinated control of the hybrid wind-solar microgrid with fast frequency response as described in Embodiment 1 of the present disclosure is realized. Steps in the method, the steps being:

[0084] Obtain the operating status data of each distributed energy source;

[0085] Using the obtained operating state data, the total optimal power input is obtained according to the model predictive control algorithm;

[0086] The total optimal power input is allocated across all DERs in the microgrid by the maximum rated power and state of charge at a given time.

[0087] The detailed steps are the same as the distributed coordinated control method for fast frequency response of the hybrid-connected wind-solar microgrid provided in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a fast frequency response distributed coordination control method and system for a series-parallel wind and light micro-grid. The method comprises the following steps: acquiring operation state data of each distributed energy source; obtaining total optimal power input according to a model predictive control algorithm by using the obtained operation state data; and distributing total optimal power input on all distributed energy sources in the micro-grid through the maximum rated power and the charging state of the given time. The inertia of the wind energy or solar energy photovoltaic power supply AC micro-grid with a plurality of distributed converter interfaces is obviously improved, and when the power drawn by the load suddenly changes, the frequency change of the system is reduced.

Description

technical field [0001] The present disclosure relates to the technical field of frequency response control of microgrids, and in particular to a distributed coordinated control method and system for fast frequency response of hybrid wind-solar microgrids. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] To reduce the environmental impact of greenhouse gases that cause global warming, the demand for power from renewable sources is increasing. 40% of total carbon dioxide emissions in the atmosphere are generated by electricity generation worldwide. Therefore, the power industry's energy needs to shift from non-renewable energy sources (such as coal and natural gas) to more sustainable energy sources (such as solar energy, wind energy, water energy, hydrogen energy, etc.). However, with existing technologies, this change in energy form com...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/241Y02E10/76
Inventor 张祯滨欧路利可·巴巴悠米李真胡存刚
Owner SHANDONG UNIV
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