Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method

A wind turbine and energy technology, applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of low reliability, vague energy distribution scheme, slow response speed, etc., to reduce energy absorption, improve rapidity and The effect of reliability

Inactive Publication Date: 2017-02-01
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, the existing low-voltage ride-through control methods for hydraulic wind turbines generally have defects such as single control variable

Method used

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  • Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method
  • Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method
  • Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method

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Experimental program
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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing:

[0036] Such as figure 1 As shown, the wind turbine in the present invention mainly includes a wind speed sensor 1, a wind wheel 2, a first rotational speed torque sensor 3, a quantitative pump 4, a first pressure sensor 5, a proportional throttle valve 6, a second pressure sensor 7, a flow rate Sensor 8, variable motor 9, second speed torque sensor 10, generator 11, multi-function instrument 12, power grid 13, speed controller 14, power controller 15 and pitch angle controller 16;

[0037]The wind wheel is connected to the quantitative pump through the transmission shaft, the first rotational speed torque sensor is arranged on the transmission shaft, and the wind speed sensor is installed in front of the wind wheel; the oil outlet of the quantitative pump is connected to the oil inlet of the proportional throttle valve through the pipeline , the first pressure sensor is in...

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Abstract

The invention relates to a hydraulic wind power generation set and an energy layered-controlled low-voltage ride through control method. When a power grid voltage drops due to a fault, top-layer control is that a pitch angle of a wind turbine is controlled by a pitch angle controller so as to reduce wind energy capturing; intermediate-layer control is that control on a pivot angle of a variable motor is realized by a rotational speed controller, a high-voltage pressure of a hydraulic system is reduced, so that the rotational speed of a fixed displacement pump is increased, and residual power is converted to kinetic energy of a wind wheel; and bottom-layer control is that the opening degree of a proportional throttle valve is controlled by a power controller, residual energy is converted to thermal energy, and finally, storage, consumption and release of residual energy are realized during the low-voltage ride through process. The transmission energy of the machine set is controlled by pitch adjustment, wind abandoning, inertia energy storage of the wind turbine and proportional throttling coordinated control, the residual energy of the machine set is suppressed from a source, and the energy loss during the low-voltage ride through process is also effectively prevented; and meanwhile, by adding a proportional throttling stage, the system response is sped up, and the system is flexible in action.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind turbine and a low voltage ride through control method. Background technique [0002] Energy is the foundation of human survival and development. With the development and progress of society, human demand for energy continues to grow. As an important and most mature renewable energy technology, wind energy has abundant reserves, wide distribution, renewable and pollution-free How to make full use of wind energy is an important direction for the development of renewable energy. [0003] From the perspective of transmission system, wind turbines can be divided into gearbox type, direct drive type and hydraulic type. As a new generation of wind power generation equipment, hydraulic wind turbines have received widespread attention. Compared with traditional models, on the one hand, the rigid transmission of the gearbox in most models is replaced by hydrostatic tr...

Claims

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Application Information

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IPC IPC(8): H02J3/38F03D7/00
CPCF03D7/00H02J3/386Y02E10/72Y02E10/76
Inventor 艾超柏文杰孔祥东董彦武吴超
Owner YANSHAN UNIV
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