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Converter, control method thereof and wind power generation system

A technology for wind power generators and converters, applied in control systems, control generators, wind power generation, etc., can solve the problems of converter DC voltage rise, low voltage ride-through capability limitation, output power containing harmonics, etc., to achieve Effects of reducing harmonics, improving power quality, and avoiding impact

Inactive Publication Date: 2016-02-24
SHANGHAI DIANJI UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For direct-drive wind turbines, when the grid voltage drops, it will cause the DC voltage in the converter to rise, and its output power contains harmonics, which will affect the grid
Therefore, the low voltage ride-through capability of existing power converters is limited, and the output power contains harmonics

Method used

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  • Converter, control method thereof and wind power generation system
  • Converter, control method thereof and wind power generation system
  • Converter, control method thereof and wind power generation system

Examples

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with accompanying drawing:

[0029] refer to figure 1 and figure 2 , the converter 10 of the present invention includes an electro-optical conversion module 11, an electro-optical conversion controller 12 connected to the electro-optical conversion module 11, a photoelectric conversion module 13 and a photoelectric conversion controller 14 connected to the photoelectric conversion module 13, the electro-optical conversion One end of the module 11 is connected to the generator 22 of the wind power generating set 20 through a circuit, and the other end is connected to the photoelectric conversion module 13 through an optical path. The other end of the photoelectric conversion module 13 is connected to the power grid 30. The wind turbine 21 of 20 is connected, and the photoelectric conversion controller 14 is connected with the power grid 30 . The electro-optical conversion module 11 and the photoelectric...

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Abstract

The invention discloses a converter, a control method thereof and a wind power generation system. The converter comprises an electrical light conversion module, an electrical light conversion controller connected with the electrical light conversion module, a photoelectric conversion module and a photoelectric conversion controller connected with the photoelectric conversion module, wherein one end of the electrical light conversion module is in circuit connection with a wind power generation unit, the other end of the electrical light conversion module is in light path connection with the photoelectric conversion module, the other end of the photoelectric conversion module is connected with the electrical power network, the electrical light conversion controller is connected with the wind power generation unit, the photoelectric conversion controller is connected with the electrical power network, the electrical light conversion module is controlled by the electrical light conversion controller to adjust side energy of the wind power generation unit, and the photoelectric conversion module is controlled through the photoelectric conversion controller to adjust the side energy of the electrical power network. According to the converter, through electrical light conversion and photoelectric conversion, electrical decoupling at wind power generation sides and electrical power network sides can be realized, harmonic waves are reduced, and low and high voltage ride through capabilities of the wind power generation unit can be improved.

Description

technical field [0001] The invention relates to a wind power generating set, in particular to a converter, its control method and a wind power generating system. Background technique [0002] A wind turbine is an electrical device that converts wind energy into mechanical energy, which drives the rotor to rotate, and finally outputs alternating current. The devices required for wind power generation are called wind turbines, including wind turbines and generators. The transmission lines of the wind turbines are connected to the grid through which the electrical energy is transmitted. The integration of wind turbines into the grid needs to meet three conditions: the frequency, voltage, and phase of the wind turbine must be consistent with the frequency, voltage, and phase of the grid. Due to the randomness of wind energy, the frequency and voltage of the electric energy generated by wind turbines are unstable. Therefore, in order to provide stable and high-quality electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/01H02P9/00H02P101/15
CPCH02J3/01H02J3/386H02P9/00Y02E10/76Y02E40/40
Inventor 宁尚贤辛绍杰杨恩星王晨
Owner SHANGHAI DIANJI UNIV
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