Control method for fault ride-through of doubly-fed wind power generation system

A technology of double-fed wind power generation and wind power generation system, which is applied in the directions of generator control circuit, wind energy power generation, control system, etc., can solve problems such as application difficulties.

Active Publication Date: 2018-12-07
XI AN JIAOTONG UNIV
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Problems solved by technology

However, there is no general solution to the nonlinear form of the HJI inequality, which brings some difficulties to the application of the theory

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  • Control method for fault ride-through of doubly-fed wind power generation system
  • Control method for fault ride-through of doubly-fed wind power generation system
  • Control method for fault ride-through of doubly-fed wind power generation system

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Embodiment Construction

[0111]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0112] In a power system containing doubly-fed wind turbines, in order to achieve fault ride-through of the doubly-fed wind power generation system, it is necessary to make full use of the control capability of the converter itself to maximize the interference suppression effect of the wind power generation system during the fault period and Improve dynamic response perf...

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Abstract

The invention provides a control method for the fault ride-through of a doubly-fed wind power generation system. The method includes the following steps that: S1, a preset robust H-infinity control model is solved, rotor-side converter excitation voltage control signals are acquired, the objective of the preset robust H-infinity control model is to maximize the interference suppression effect of the wind power generation system and improve the dynamic response performance of the wind power generation system during a fault; and S2, the turning off of a converter is controlled according to the rotor-side converter excitation voltage control signals, and therefore, the fault ride-through of the doubly-fed wind power generation system is realized. The mathematical model of a controlled objectis updated based on an ISS theory, so that the stability of the controlled system can be theoretically guaranteed. The control method of the invention robustly controls the doubly-fed wind power generation system based on an SDRE technology, and improves the fault ride-through capability of the doubly-fed wind power generation system.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a control method for fault ride-through of a doubly-fed wind power generation system. Background technique [0002] Due to the depletion of fossil energy and the prominent environmental pollution problems, it has become a world consensus to vigorously develop renewable energy power generation technology. Among them, wind power generation system is the fastest growing renewable energy generation technology in recent years. Doubly Fed Induction Generator (DFIG), as one of the most important wind turbines, has the advantages of smaller size, lower cost, flexible control, etc., and is widely used in practical applications. [0003] However, with the large number of double-fed wind turbines put into operation, their sensitivity to grid fluctuations may have an adverse effect on the stability of the entire power system. Therefore, the power grid codes of many...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02P9/00H02P9/10H02P101/15
CPCH02J3/386H02J2203/20H02P9/007H02P9/102H02P2101/15Y02E10/76
Inventor 秦博宇方铖孙浩原李景谢鹏浩
Owner XI AN JIAOTONG UNIV
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