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Prediction control method for output feedback fuzzy model of uncertain direct-current microgrid

A DC microgrid, fuzzy model technology, applied in the direction of DC network circuit device, adaptive control, general control system, etc., can solve the problems of complex DC microgrid system, no published literature or open research results, etc.

Pending Publication Date: 2020-04-10
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, due to the complexity of the DC microgrid system due to the uncertainty of the constant power supply load, the existing control theory method based on the T-S fuzzy model has not been directly and successfully applied to the actual DC microgrid system.
In particular, there is no published literature or public research results on the fuzzy model predictive control method for output feedback of DC microgrid with uncertainties.

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  • Prediction control method for output feedback fuzzy model of uncertain direct-current microgrid
  • Prediction control method for output feedback fuzzy model of uncertain direct-current microgrid
  • Prediction control method for output feedback fuzzy model of uncertain direct-current microgrid

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Embodiment Construction

[0106] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0107] A fuzzy model predictive control method for output feedback of an uncertain DC microgrid, comprising the following steps:

[0108] Step 1, given a nonlinear DC microgrid system with a constant power supply load.

[0109] Step 2, obtain the T-S fuzzy model of the DC microgrid to get M i , A i , B es , B s .

[0110] Step 3, discretize the obtained DC microgrid T-S fuzzy model.

[0111] Step 4, design the fuzzy state observer of the DC microgrid.

[0112] Step 5, design the DC microgrid output feedback fuzzy model predictive controller.

[0113] Step 6. Assign the obtained controller and observer gains to the loop to realize the output feedback fuzzy model predictive control of the constant power supply load of the DC microgrid with uncertainty.

[0114] In step 1, establishing the dynamic model of the DC microgrid syste...

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Abstract

The invention relates to a prediction control method for the output feedback fuzzy model of an uncertain direct-current microgrid. The method comprises the following steps of: firstly, giving a nonlinear DC microgrid system with a constant power load; obtaining parameters by obtaining the T-S fuzzy model of a direct-current microgrid; then discretizing the T-S fuzzy model of the direct-current microgrid; designing the fuzzy state observer and the output feedback model prediction controller of the direct-current microgrid, wherein gains of the observer and the fuzzy controller can be calculatedthrough a numerical value LMI solver, and the gains do not need to be calculated manually; and assigning the solved gains of the controller and the observer to a loop to realize prediction control ofthe uncertain direct-current microgrid output feedback fuzzy model of the constant-power power supply load.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to a fuzzy model predictive control method for output feedback of an uncertain DC microgrid. Background technique [0002] As sustainable power sources continue to expand into modern power networks, the idea of ​​aggregating them into microgrid (MG) architectures and thus simplifying their management has attracted considerable research interest. Since traditional grids rely on AC systems, research on microgrids has mainly focused on alternating current (AC) architectures. In contrast to AC microgrids, DC microgrids have the advantages of higher efficiency, reactive power and harmonics. These DC microgrids consist of multiple sources and DC / AC loads connected together through power electronic converters and filters. Typically, interface converters are applied in DC microgrids to connect sustainable power sources to public power buses. In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00G05B13/04
CPCH02J1/00G05B13/042
Inventor 解相朋倪茂卫胡松林岳东
Owner NANJING UNIV OF POSTS & TELECOMM
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