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Distributed control method considering time lag and packet loss problems in microgrid under CPS concept

A distributed control and problem-solving technology, applied in the direction of AC network circuits, single-network parallel feeding arrangements, electrical components, etc., can solve the problems that the voltage value and angular frequency value of the micro-grid system cannot reach the expected reference value, and achieve The effect of solving time lag and packet loss problems, eliminating control errors, and reducing control time

Active Publication Date: 2018-02-16
YANSHAN UNIV
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AI Technical Summary

Problems solved by technology

Simple droop control cannot achieve the expected reference value for the voltage value and angular frequency value of the microgrid system

Method used

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  • Distributed control method considering time lag and packet loss problems in microgrid under CPS concept
  • Distributed control method considering time lag and packet loss problems in microgrid under CPS concept
  • Distributed control method considering time lag and packet loss problems in microgrid under CPS concept

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] A kind of distributed control method considering time lag and packet loss problem in the microgrid under the CPS concept of the present invention, its content is as follows:

[0028] Step 1: Analyze the information flow transmission in the communication system based on the concept of CPS and graph theory, and build a mathematical model of communication system flow.

[0029] The specific implementation process of step 1:

[0030] 1. The concept of CPS:

[0031] Cyber-physical system (CPS) is a combination of communication system and physical system. It is a complex system that includes computational decision-making devices, communication systems, and physical systems. Its real-time data perception, dynamic control and information service functions are realized through deep 3C (control, computing, communication) cooperation.

[0032]...

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Abstract

The invention divides a microgrid control structure into a communication system and a physical system based on the concept of an information physical fusion system, and a novel distributed control strategy is proposed on this structure to improve a control effect of voltage and angular frequency by traditional droop control. Firstly, a microgrid communication system model is proposed based on graph theory knowledge, and communication structures of a plurality of single distributed power supplies form an integral communication system; secondly, in the communication system, a method combining areverse neural network and prediction control is proposed to solve the problem of communication time lag; a novel consistency protocol with a virtual navigator is proposed to solve the problem of packet loss; thirdly, in the physical system, P-omega / Q-U droop control is used as primary control of voltage and angular frequency; and finally, voltage and angular frequency data in the communication system and the proposed novel consistency protocol are utilized to complete secondary control of voltage and angular frequency output by droop control in the physical system, and the control strategy has a distributed cooperative characteristic.

Description

technical field [0001] The invention belongs to the field of smart grid control, and in particular relates to a design method of a distributed coordination control strategy in a microgrid under the concept of CyberPhysical Systems (CPS for short) and considering communication time lag and packet loss. Background technique [0002] Cyber-physical fusion system is the combination of communication system and physical system. It is a complex system that includes computational decision-making devices, communication systems, and physical systems. It has the functions of real-time perception, dynamic control and providing information services for large-scale engineering systems. These functions are obtained through the organic integration and in-depth cooperation of control technology, computing technology, and communication technology. CPS is a next-generation engineering system with broad industrial application prospects. However, there will be problems of time lag and packet ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J13/00
CPCH02J13/0013H02J3/381H02J2203/20Y02E40/70Y04S10/12Y04S10/40Y04S10/50
Inventor 窦春霞张博王瑞山孟驰华张亚民
Owner YANSHAN UNIV
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