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Novel finite control set model prediction control method applied to grid-connected inverter

A technology of model predictive control and limited control set, which can be applied in the direction of converting irreversible DC power input to AC power output, AC network circuit, single-network parallel feeding arrangement, etc., which can solve problems such as heavy computational burden and reduce the number of , the effect of improving work efficiency and reducing computing time

Pending Publication Date: 2022-01-28
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new finite control set model predictive control method applied to grid-connected inverters, aiming to solve the problem of heavy computational burden of traditional finite control set model predictive control methods, reduce system computational complexity, optimize and Control performance of grid inverter

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  • Novel finite control set model prediction control method applied to grid-connected inverter
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Embodiment Construction

[0032] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] Such as figure 1 The present invention provides a novel finite control set model predictive control method applied to grid-connected inverters, including:

[0034] S110. Select a candidate vector of the inverter output voltage at the current moment according to the operating state of the system.

[0035] It should be noted that the grid-connected inverter used in the embodiment of the present invention is an LCL type three-pha...

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Abstract

The invention discloses a novel finite control set model prediction control method applied to a grid-connected inverter, and the method comprises the steps: selecting an inverter output voltage candidate vector at a current moment according to a system operation state; according to the selected inverter output voltage candidate vector, screening out an optimal output voltage vector, and activating the optimal output voltage vector in the next period; and storing the obtained switch sequence corresponding to the optimal output voltage vector into a memory, and updating and iterating the stored data by taking a power frequency period as a period. By applying the embodiment of the invention, on the premise that the sampling frequency is not improved and the electric energy quality is not damaged, the number of candidate vectors can be reduced fundamentally, the calculation complexity of the algorithm is reduced, the calculation time of the grid-connected inverter control algorithm is greatly shortened, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electrical automation and new energy grid-connected power electronic conversion equipment, in particular to a novel finite control set model predictive control method applied to grid-connected inverters. Background technique [0002] In recent years, with the rapid development of renewable energy, distributed generation systems have received extensive attention. As an important component connecting the DC power supply and the grid, the control performance of the grid-connected inverter directly determines the power generation quality of the system. In order to obtain high-quality electric energy, in addition to the traditional linear control strategy, many nonlinear control strategies such as sliding mode control, passive control, and model predictive control are widely used in the control of grid-connected inverters. Among them, due to the advantages of no modulator, fast dynamic response, simple operat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M1/12H02J3/38
CPCH02M7/48H02M1/126H02J3/381H02J2300/20
Inventor 吴卫民张冰涛安丽琼
Owner SHANGHAI MARITIME UNIVERSITY
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