Wind turbine generator variable pitch control system safety assessment method

A technology of wind turbines and control systems, which is applied in the control of wind turbines, monitoring of wind turbines, and wind power generation, and can solve problems such as reducing safety

Inactive Publication Date: 2019-10-22
天津瑞源电气有限公司
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AI Technical Summary

Problems solved by technology

[0002] With the increasing scale of wind turbines and the increasingly complex working conditions, the pitch control system is currently the main cause of abnormal downtime. Some wind turbines are passively reduced in capacity due to control settings, which reduces safety.

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  • Wind turbine generator variable pitch control system safety assessment method
  • Wind turbine generator variable pitch control system safety assessment method
  • Wind turbine generator variable pitch control system safety assessment method

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0041] A safety assessment method for wind turbine pitch control system, such as figure 1 shown, including the following steps in order:

[0042] 1) For each switching sub-controller of the pitch system, calculate the equilibrium point, calculate the steady-state sub-manifold for the unstable equilibrium point, and calculate the stable control domain from the theoretical level based on the semi-tensor product theory; at the same time, Calculate the engineering-level stability control domain of wind turbines through non-parametric modeling; the stability control domain of the pitch system refers to the state set that the closed-loop control system ensures stability; in the wind power system, the allowable state set is called the design domain , the security control domain is t...

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Abstract

The invention discloses a wind turbine generator variable pitch control system safety assessment method. The method comprises the following steps that for each switching subsidiary controller of a variable pitch system, a balance point is calculated, stable state submanifolds are calculated for instable balance points, and a theoretical level stable control domain is calculated based on a semi-tensor product theory; meanwhile, by means of non-parametric modeling, an engineering level stable control domain of a wind turbine generator is calculated; a linear weighting method is utilized for comprehensively analyzing a fan theoretical level stable control domain, the engineering level stable control domain and a design safety domain, and a safety control domain of the system is obtained finally; and a safety control curve is generated according to the generated safety domain, a Monte Carlo simulation method is utilized for assessing the change tendency, and therefore safety assessment isachieved. The wind turbine generator variable pitch control system safety assessment method provides the technology support for safety operation and efficient operation of the generator.

Description

technical field [0001] The invention relates to the technical field of wind power safety assessment, in particular to a safety assessment method for a pitch control system of a wind turbine. Background technique [0002] With the increasing size of wind turbines and the increasingly complex working conditions, the pitch control system is currently the main cause of abnormal downtime. Some wind turbines are passively reduced in capacity due to control settings, which reduces safety. Based on the established mathematical model of wind turbine operation, an effective and reliable state safety assessment is carried out. At present, the research field of the pitch control system and even the safety assessment of wind turbines is still blank. The existing method research and engineering practice mainly focus on the pitch gear, Failure assessment of components such as motors. How to improve the overall stability of the pitch control system, improve power generation efficiency and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00F03D80/00F03D7/04
CPCF03D7/0236F03D7/042F03D17/00F03D80/00Y02E10/72
Inventor 赵双喜张磊杨霞
Owner 天津瑞源电气有限公司
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