Fan variable pitch control method and system based on PI algorithm

A control method and technology for a control system, which are applied to engine control parameters, control of wind turbines, wind turbines, etc., can solve problems such as wind speed that are not suitable for real-time changes, and achieve the goal of shortening response time, improving rapidity, and stabilizing output power. Effect

Active Publication Date: 2018-07-31
XUJI GRP +1
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a fan pitch control method and system based on PI algorithm, which is used to solve the problem that the fan pitch control method in the prior art is not suitable for real-time changing wind speed

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  • Fan variable pitch control method and system based on PI algorithm
  • Fan variable pitch control method and system based on PI algorithm
  • Fan variable pitch control method and system based on PI algorithm

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Embodiment Construction

[0032] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0033] In order to solve the problem of inaccurate fan pitch control caused by wind speed changes, the present invention provides a fan pitch control system based on PI algorithm. Such as figure 1 As shown, the fan pitch control system includes an acquisition unit, a wind speed feedforward control unit and a fan pitch controller, wherein the acquisition unit is used to collect wind speed in real time, and the wind speed feedforward control unit is used to perform feedforward control on the collected wind speed. And send the wind speed after feedforward control to the pitch controller, the acquisition unit also collects the real-time power of the generator, and sends the difference between the collected real-time power of the generator and the rated power of the generator to the PI pitch control The controller outputs the pitch angle by adjusting ...

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Abstract

The invention provides a fan variable pitch control method and system based on a PI algorithm. The fan variable pitch control method comprises the steps that a shear wind speed is filtered out by feedforward control, and a wind speed measurement error is supplemented; wind speed change is input into a variable pitch controller as an interference value, and a difference value between collected real-time power of a generator and rated power of the generator is sent to the variable pitch controller; the variable pitch controller of a fan adopts the PI algorithm, a pitch angle can be quickly and accurately adjusted when the wind speed changes frequently and disturbance of fan blades is large, so that the fan blades are prevented from shaking due to uneven stress, the fan can be maintained in the rated generator power state, and the steady and dynamic performance of a fan variable pitch system can be effectively controlled. The response time of the fan variable pitch control system is shortened, the rapidity of the system is improved, the output power of a fan unit is stabilized, and the power generation efficiency of the fan unit is improved.

Description

technical field [0001] The invention belongs to the technical field of wind turbine control, and in particular relates to a wind turbine pitch control method and system based on a PI algorithm. Background technique [0002] Wind energy is a renewable and clean energy. Wind power generation is booming worldwide. At the same time, the market has higher and higher requirements for wind power technology, and the requirements for wind power generation efficiency, stability, and intelligence are getting higher and higher. The environment in which the wind turbine is located is complex and is greatly affected by natural conditions such as weather, wind direction, wind speed, rainfall, terrain, and altitude, which put forward higher requirements for the stability and reliability of the wind turbine control system. Among them, an important issue is the stability of the wind turbine pitch system, because the diameter of the wind rotor of the wind turbine is about 100 meters, coupled w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/32F05B2270/705Y02E10/72
Inventor 李春阳刘伟鹏张小伟
Owner XUJI GRP
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