Passive fault-tolerant control method for wind turbine based on linear parameter varying (LPV) variable gain

A control method and technology for wind turbines, which are applied in the control of wind turbines, wind turbines, machines/engines, etc., can solve the problem that the wind turbine cannot be repaired in time.

Active Publication Date: 2013-10-30
JIANGNAN UNIV
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Problems solved by technology

[0015] The purpose of the present invention is to provide a passive fault-tolerant control method for wind turbines based on LPV variable gain for the existing wind turbines that are prone to failure and cannot be repaired in time. fault-tolerant control

Method used

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  • Passive fault-tolerant control method for wind turbine based on linear parameter varying (LPV) variable gain
  • Passive fault-tolerant control method for wind turbine based on linear parameter varying (LPV) variable gain
  • Passive fault-tolerant control method for wind turbine based on linear parameter varying (LPV) variable gain

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Embodiment Construction

[0082] The present invention will be further described below in conjunction with drawings and embodiments.

[0083] Such as Figure 4 Shown is the passive fault-tolerant control structure diagram of the wind turbine hydraulic pitch actuator.

[0084] The first step, according to formula (1,2,7-15) and figure 2 image 3 The mathematical model of the fan shown constitutes the state space expression shown in Equation (16). Rewrite the obtained model into an affine parameter-dependent model, as shown in formula (17), the system depends on the external disturbance variable input wind speed θ op and controller gain scheduling variable hydraulic oil air density θ f .

[0085] The second step is to construct the following system auxiliary matrix according to formula (18).

[0086] A Δ = NA c M T - X Y ...

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Abstract

The invention discloses a passive fault-tolerant control method for a wind turbine based on linear parameter varying (LPV) variable gain. The method comprises the following steps of: decomposing a model structure of the wind turbine into various subsystems, and performing inductive analysis on faults and spreading influences of the subsystems; performing fault modeling on a variable pitch hydraulic control system with easily occurred faults; making the input wind speed dynamical change along with the parameters of a controller by employing the LPV variable gain control method; and finally, performing projection theorem decomposition on body mass index (BMI) problems caused by variables which cannot be measured in a fault model, converting the BMI problems into linear mass index (LMI) problems, and solving the parameters of the controllers. According to the invention, the controller is realized on a field programmable gate array (FPGA), the wind turbine is small in volume and flexible in design, and the controller is high in response speed; and moreover, the method is not required to depend on a fault diagnosis system, so that the controller can reliably work in a severe environment..

Description

technical field [0001] The invention relates to a wind turbine passive fault-tolerant control method based on LPV variable gain, belonging to the field of passive fault-tolerant control. Background technique [0002] The development of modern society has an increasing demand for energy, while the depletion of fossil energy and environmental problems make its cost higher and higher, so the development and utilization of renewable energy has received more and more attention. Wind energy, because of its cleanness, wide distribution and inexhaustible supply, has become the fastest growing renewable energy in the world. [0003] Since most wind turbines are installed on the coast, away from human habitation, unscheduled maintenance costs will be very expensive. In this case, fault-tolerant control will be a very beneficial technology for wind turbines. It can make wind turbines still work normally and produce electric energy when a fault occurs and cannot be repaired in time. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 吴定会李意扬王莉纪志成沈艳霞潘庭龙赵芝璞高春能
Owner JIANGNAN UNIV
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