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DC micro-grid multi-mode switching control method based on network delay compensation

A DC microgrid and network delay technology, which is applied in parallel operation of DC power supplies, DC network circuit devices, load balancing in DC networks, etc., can solve the problem of difficult to ensure stable operation of DC microgrids, grid fluctuations, affecting stable operation, etc. question

Active Publication Date: 2019-10-25
MINJIANG UNIV
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AI Technical Summary

Problems solved by technology

[0002] DC micro-grid has multi-mode switching to maintain energy balance, and multi-mode switching of DC micro-grid will make the grid fluctuate and affect its stable operation
At the same time, in order to reduce the cost of traditional point-to-point communication and the inconvenience of maintenance, the signal transmission between each power generation unit and the converter of the DC microgrid is based on network communication, and the multi-mode switching characteristics with network delay make it more difficult to ensure Stable operation of DC microgrid

Method used

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  • DC micro-grid multi-mode switching control method based on network delay compensation
  • DC micro-grid multi-mode switching control method based on network delay compensation
  • DC micro-grid multi-mode switching control method based on network delay compensation

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Embodiment Construction

[0166] like figure 1 , as shown in 2, this embodiment provides a DC microgrid multi-mode switching control method based on network delay compensation, which specifically includes the following steps:

[0167] Step S1: Build a DC microgrid multimodal switching system; wherein, the DC microgrid multimodal switching system includes a photovoltaic power generation panel, a DC / DC module, a bidirectional DC / DC module, a lead-acid battery and a DC load; the The photovoltaic power generation panel is connected to the DC / DC module and then connected to the DC load, and the lead-acid battery is connected to the bidirectional DC / DC module and then connected to the DC load;

[0168] Step S2: According to the physical principles and the expression method of the T-S model, establish a DC microgrid multi-mode switching system model;

[0169] Step S3: Aiming at the network delay multi-mode switching problem of DC microgrid, design a switchable network delay estimator based on reachable set, ...

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Abstract

The invention relates to a DC micro-grid multi-mode switching control method based on network delay compensation. First, a DC micro-grid multi-mode switching system is built, and the non-linear dynamics of the DC micro-grid multi-mode switching system is expressed by a principle of physics and a T-S model method. In view of the fact that the multi-mode switching of network delay communication is very important for the stable operation of the DC micro-grid, a reachable set switching controller based on delay compensation is designed against the problem of network delay multi-mode switching of the DC micro-grid. Thus, the DC micro-grid system can operate stably, and the steady-state performance of the system is ensured.

Description

technical field [0001] The invention relates to the field of power grid control, in particular to a DC micro-grid multi-mode switching control method based on network delay compensation. Background technique [0002] DC microgrid has multi-mode switching to maintain energy balance, and multi-mode switching of DC microgrid will make the grid fluctuate and affect its stable operation. At the same time, in order to reduce the cost of traditional point-to-point communication and the inconvenience of maintenance, the signal transmission between each power generation unit and the converter of the DC microgrid is based on network communication, and the multi-mode switching characteristics with network delay make it more difficult to ensure Stable operation of DC microgrid. Contents of the invention [0003] In view of this, the object of the present invention is to propose a DC microgrid multi-mode switching control method based on network delay compensation, so as to make the D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/14H02J1/10H02J7/35
CPCH02J1/102H02J1/14H02J7/35
Inventor 汪星一钟智雄伍文才万芳
Owner MINJIANG UNIV
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