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Distributed control method and device of micro-grid system and storage medium

A distributed control and micro-grid technology, applied in the direction of circuit devices, DC network circuit devices, electrical components, etc., can solve the problems that the flexibility and response speed potential of the micro-grid cannot be brought into play, and achieve the guarantee of system frequency and load bus voltage Effect

Active Publication Date: 2020-08-18
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are significant differences between traditional large-scale power systems and inverter-interfaced microgrids. Traditional control solutions have been proven effective for large-scale power systems, but their control methods need to be modified to introduce them into microgrids.
The simplest solution is to increase the virtual inertia of the inverter-interfaced microgrid, but this approach cannot exploit the potential of the microgrid in terms of flexibility and responsiveness

Method used

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  • Distributed control method and device of micro-grid system and storage medium
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  • Distributed control method and device of micro-grid system and storage medium

Examples

Experimental program
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Embodiment 1

[0044] The first embodiment of the present invention proposes a distributed control method for a microgrid system, such as figure 1 shown, including:

[0045] S10. Integrate the subsystems under the microgrid system according to the determined common reference signal;

[0046] S20. Determine a reference initial phase angle corresponding to the bus voltage of the subsystem based on the bus voltage of the subsystem and the power line parameters;

[0047] S30. Perform phase angle adjustment according to the reference initial phase angle to obtain a control signal of a corresponding subsystem.

[0048]Specifically, the method in this embodiment is applicable to a microgrid system composed of an inverter-interfaced distributed generator (DG), which includes multiple subsystems. In this embodiment, two-level control is adopted for any subsystem, and it is also That is, the first-level control includes determining the reference initial phase angle corresponding to the bus voltage o...

Embodiment 2

[0100] The second object of the present invention is achieved through such a technical solution, a distributed control device for a microgrid system, including:

[0101] A tuning unit is used for integrating the subsystems under the inverter-interfaced microgrid system according to the determined common reference signal;

[0102] The first controller determines a reference initial phase angle corresponding to the bus voltage of the subsystem based on the bus voltage of the subsystem and power line parameters;

[0103] The second controller is configured to perform phase angle adjustment according to the reference initial phase angle to obtain control signals of corresponding subsystems.

[0104] Specifically, if figure 2 As shown, in this embodiment, the microgrid includes an inverter interface type distributed generator (DG), including multiple subsystems, and the common reference signal integrates multiple subsystem controllers together, and each subsystem corresponds to a...

Embodiment 3

[0110] The third object of the present invention is achieved by such a technical solution, a computer-readable storage medium, the computer-readable storage medium stores a program for implementing information transmission, and when the program is executed by a processor, the aforementioned Distributed control method for microgrid system.

[0111] In one embodiment, the processor invokes a program in a computer-readable storage medium to implement the following operations:

[0112] Integrate subsystems under the microgrid system according to the determined common reference signal;

[0113] determining a reference initial phase angle corresponding to the bus voltage of the subsystem based on the bus voltage of the subsystem and power line parameters;

[0114] Phase angle adjustment is performed according to the reference initial phase angle to obtain control signals of corresponding subsystems.

[0115] Those skilled in the art should understand that the embodiments of the pr...

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Abstract

The invention discloses a distributed control method of a micro-grid system. The method comprises the following steps: firstly, integrating subsystems under the micro-grid system according to a determined public reference signal; determining a reference initial phase angle corresponding to the bus voltage of the subsystem based on the bus voltage of the subsystem and the power line parameters; andfinally, performing phase angle adjustment according to the reference initial phase angle to obtain a control signal corresponding to the subsystem. According to the method, the flexibility and the response speed of the micro-grid can be brought into full play, and the stability of micro-grid system frequency and load bus voltage is ensured. The invention further relates to a distributed controldevice of the micro-grid system and a computer readable storage medium for executing the method.

Description

technical field [0001] The invention relates to the technical field of grid control, in particular to a distributed control method, device and storage medium of a micro grid system. Background technique [0002] Inverter-interfaced distributed generators (DGs) are the basic building blocks of emerging microgrids. Different types of DGs, such as photovoltaics, wind turbines, and fuel cells, are connected to microgrids through power electronic rectifiers / inverters. Inverter interface type DG is more flexible and fast in response, these advantages make DG easier to operate and control compared with traditional synchronous generator (SG). However, it is challenging to control such a microgrid composed of distributed generation units due to negligible inertia and intermittent generation, as well as severe load variations. If these challenges are not properly addressed, the advantages and potential of inverter-interfaced microgrids cannot be fully realized. The microgrid is one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/24H02J3/381H02J3/241H02J2300/22H02J2300/28H02J2300/30
Inventor 方辉谢刚文朱小军张友强朱晟毅肖强周敬森向红吉余亚南付昂王瑞妙马兴宫林李松浓
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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