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Dynamic cascade predictive control method for ocean direct-drive permanent magnet synchronous wind power converter

A wind power converter and permanent magnet synchronization technology, which is applied in synchronous generator control, motor generator control, electronic commutation motor control, etc., can solve problems such as priority confusion, multi-objective mixing, and debugging complexity, and achieve simplification Design process, avoidance of selection problems, effect of low loss

Active Publication Date: 2021-08-27
SHANDONG UNIV
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Problems solved by technology

[0008] In order to solve the above problems, the present invention proposes a dynamic cascade predictive control method for marine direct-drive permanent magnet synchronous wind power converters. The present invention uses different control Targets are prioritized according to their importance, and then multi-target control is achieved by screening switch vectors in the order of priority, which eliminates the problems of traditional models with many control right coefficients, complicated debugging, mixed multiple targets, and chaotic priorities

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  • Dynamic cascade predictive control method for ocean direct-drive permanent magnet synchronous wind power converter

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[0058] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0059] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0060] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0061] A ...

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Abstract

According to a dynamic cascade predictive control method based on a current error threshold value, different control targets are subjected to priority ranking according to the importance degree, then multi-target control is achieved in the mode that switching vectors are screened according to the priority sequence, so that the problem that a traditional model is numerous in control right coefficient and complex in debugging, and the problems of multi-target mixing and priority confusion are solved. According to the method, the number of the switching vectors screened by a first-stage current controller is automatically adjusted through current error calculation, and the problem of poor control performance of a lower-priority target caused by the fixed screening switching vectors in traditional cascade prediction control is solved. In addition, the method also improves the effect of first-stage current control, and improves the grid-connected power quality of a permanent magnet synchronous fan. The method has a wide application prospect in the field of wind power integration.

Description

technical field [0001] The invention belongs to the technical field of grid-connected control of marine wind power generation systems, and in particular relates to a dynamic cascade predictive control method for marine direct-drive permanent magnet synchronous wind power converters. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Vigorously developing renewable energy is an important means to solve energy and environmental problems, and marine wind power generation is an important way to utilize renewable energy. However, at present, a large number of offshore wind turbines cannot be connected to the grid for a long time due to reasons such as converter access control and scheduling, and it is difficult to play a role. The situation is not optimistic. Improving the performance of wind power converter system and improving the quality of wi...

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Application Information

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IPC IPC(8): H02M5/458H02P9/00H02P21/00H02J3/38H02P101/15H02P103/20
CPCH02M5/4585H02P9/00H02P21/0003H02J3/381H02P2101/15H02P2103/20H02J2300/28Y02E10/76
Inventor 张祯滨李俊达李真孙远翔刘晓栋
Owner SHANDONG UNIV
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