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Electric variable pitch control system

A technology of control system and pitch change, which is applied in the control of wind turbines, engines, wind power generation, etc. It can solve the problems of complicated process and high cost of vibration sensors, so as to increase the service life, reduce the situation of standby power supply, and reduce the mechanical impact effect

Active Publication Date: 2013-07-03
JIANGSU NEW UNITED HEAVY IND SCI & TECH +1
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AI Technical Summary

Problems solved by technology

The process is complicated, the vibration sensor installed at the root of the blade is expensive, and it puts forward high requirements for the installation technology; at the same time, the method is only applicable to the pitch control system driven by the frequency converter

Method used

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  • Electric variable pitch control system
  • Electric variable pitch control system

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Embodiment Construction

[0015] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0016] Such as figure 1 The electric pitch control system shown has a fan controller, a pitch controller for receiving blade angle signals and blade speed signals from the fan controller and synthesizing them into a single speed signal, and a blade drive controller , blades and nuts on the blades, pressure sensors for collecting pressure signals are installed on the nuts, and the blade drive controller controls the blades to change the pitch through the blade speed signal synthesized by the single speed signal and the pressure signal. Because the pressure signal modifies the single speed signal, it greatly reduces the mechanical load shock on the blades and t...

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Abstract

The invention relates to an electric variable pitch control system. The system is provided with a fan controller, a variable pitch controller, a blade drive controller, a blade and a nut, wherein the variable pitch controller is used for receiving a blade angle signal and a blade speed signal which are transmitted by the fan controller and combining the signals into a single speed signal; the nutis positioned on the blade; a pressure sensor for acquiring a pressure signal is arranged on the nut; and the blade drive controller is used for controlling the blade to change pitch through the blade speed signal which is combined by the single speed signal and the pressure signal. By the electric variable pitch control system, the stability and the reliability of a unit electric signal are enhanced, and the service life of a unit standby power supply is prolonged.

Description

technical field [0001] The invention relates to an electric pitch control system capable of enhancing the stability and reliability of electrical signals of a unit. Background technique [0002] Full-span pitch regulators are commonly used in horizontal-axis large-scale wind turbines. This kind of pitch regulator mainly completes blade pitch adjustment, controls the blade pitch angle, and maintains the maximum wind energy capture efficiency under the rated wind speed. When the wind speed changes randomly above the rated value, by adjusting the blade pitch to make the blade rotate along its longitudinal axis, the power angle of the airflow to the blade is changed, thereby changing the aerodynamic torque obtained by the wind turbine, so that the speed of the wind rotor can be better. Stable around the rated value to ensure stable output power and unit safety. When pneumatic braking is required, the pitch regulator rotates the blades to a maximum pitch angle of 90°. At this ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/02
CPCY02E10/723Y02E10/72
Inventor 谢歆刘向阳高明强薛卫春吴维林
Owner JIANGSU NEW UNITED HEAVY IND SCI & TECH
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