Maximum power tracing and bus-bar voltage coordination control method of mixed field excitation wind power generation system

A wind power generation system and maximum power tracking technology, which is applied in the direction of controlling generators through magnetic field changes, and can solve the problems of complex control, high system cost, and large device loss.

Inactive Publication Date: 2010-06-23
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the PWM rectifier has many switching devices, the device loss is large, and the control is complicated, and the larger the wind energy capture range, the higher the system cost
The DC-DC converter not only has the same capacity as the rated capacity of the system, but also has high system cost; it also requires large-capacity capacitors and inductors, which has slow dynamic response and low reliability

Method used

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  • Maximum power tracing and bus-bar voltage coordination control method of mixed field excitation wind power generation system
  • Maximum power tracing and bus-bar voltage coordination control method of mixed field excitation wind power generation system
  • Maximum power tracing and bus-bar voltage coordination control method of mixed field excitation wind power generation system

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, a preferred embodiment of the present invention is described in detail:

[0041] image 3It is a schematic structural diagram of the hybrid excitation wind power generation system applied in this embodiment. The system consists of a wind turbine (1), a multi-phase hybrid excitation generator (2), an uncontrollable rectifier bridge (3), an inverter (4), an excitation controller (5), and a grid-side inverter control module (6 ), reactor (7) and capacitor (8). The multi-phase hybrid excitation generator (2) converts the wind energy absorbed by the wind turbine (1) into electrical energy, and transmits the electrical energy to the power grid through an uncontrollable rectifier bridge (3), an inverter (4), and a reactor (7). The grid-side inverter control module (6) controls the inverter (4) by detecting the voltage and current of the grid side to realize power transmission. The excitation controller (5) is composed of a con...

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Abstract

The invention relates to a control method for tracking maximal power and coordinating bus-bar voltage of a mixing excitation wind power generation system, by regulating exciting current of the exciter. The exciting current is composed of a dynamic component and a steady state component. Not only dynamic response is good, but algorithm is simple and practical and convenient for implementing. Due to the exciting current of the exciter is needed to regulated, the energy effect of magnetic field control being high, the capacity of excitation controller being small, cost being low and reliability being high.

Description

technical field [0001] The invention relates to a new energy power generation technology, in particular to a maximum power tracking and bus voltage coordinated control method applied to a hybrid excitation wind power generation system. Background technique [0002] Wind power generation requires a system with simple structure, low cost, and reliable operation that can capture wind energy to the maximum and meet high-efficiency operation in a wide speed range. In order to maximize the capture of wind energy, wind power generation systems often use maximum power tracking control. According to the characteristics of the wind turbine, under a certain wind speed, the generator is operated at a certain speed, so as to capture the wind energy to the maximum extent and output the maximum power. At present, typical wind power generation systems include: asynchronous double-fed wind power generation system and permanent magnet synchronous wind power generation system. [0003] The t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/14
Inventor 黄苏融洪文成张琪邹海晏
Owner SHANGHAI UNIV
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