Doubly-fed fan fault ride-through method and system based on explicit model predictive control

A model predictive control and doubly-fed fan technology, applied in the control system, control generator, generator control circuit, etc., can solve the problem of affecting the effect of demagnetization, the large demagnetization linkage current value, and the inability to fully utilize the capacity of the rotor converter and other problems, to achieve the effect of improving online computing speed and simple and reliable structure

Active Publication Date: 2019-12-31
SHANDONG UNIV
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Problems solved by technology

[0005] However, according to the inventor’s understanding, the traditional demagnetization control current is obtained by multiplying the measured negative sequence and free flux linkage by a fixed proportional coefficient, and the demagnetization current value obtaine...

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  • Doubly-fed fan fault ride-through method and system based on explicit model predictive control
  • Doubly-fed fan fault ride-through method and system based on explicit model predictive control
  • Doubly-fed fan fault ride-through method and system based on explicit model predictive control

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[0044] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used in this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0046] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. 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 combin...

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Abstract

The invention provides a doubly-fed fan fault ride-through method and system based on explicit model predictive control. The defect of fixed coefficients of traditional demagnetization control is overcome; demagnetization current can be flexibly adjusted according to a fault condition to give full play to the capacity of a rotor side converter; on the basis of the traditional demagnetization control, redundant measurement links are not needed, and the method and the system can be suitable for various fault types and fault depths, suitable for online optimization control, and can meet the transient response requirements of the doubly-fed fan in the power grid fault period.

Description

technical field [0001] The disclosure belongs to the technical field of wind power control, and relates to a fault ride-through method and system for double-fed wind turbines based on explicit model predictive control. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Doubly Fed Induction Generator (DFIG) is widely used in modern wind power generation systems because of its many advantages, such as flexible active and reactive power control capabilities, mature technology, low cost and high reliability. DFIG consists of a back-to-back converter and a wound-rotor induction generator whose stator windings are directly connected to the common connection point of the grid, so are very sensitive to grid voltage fluctuations. With the increasing penetration of wind power year by year, the dynamic behavior between wind turbines and grid has becom...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02P9/00H02P9/12H02P101/15
CPCH02P9/007H02P9/123H02P2101/15
Inventor 罗嘉赵浩然高术宁韩明哲
Owner SHANDONG UNIV
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