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Control method and device for converter in doubly-fed wind power system

A technology of doubly-fed wind power and control method, applied in circuit devices, wind power generation, electrical components, etc., can solve problems such as small electrical energy

Pending Publication Date: 2019-04-05
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the electrical energy stored in the DC bus capacitor is relatively small, so the external characteristics of the fan system cannot show a large virtual inertia time constant

Method used

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  • Control method and device for converter in doubly-fed wind power system
  • Control method and device for converter in doubly-fed wind power system
  • Control method and device for converter in doubly-fed wind power system

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Embodiment Construction

[0157] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0158]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0159] The invention provides a control method and device for a converter in a doubly-fed wind power system, such as figure 1 As shown, the method includes:

[0160] 101. Determine the...

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Abstract

The invention relates to a control method and device for a converter in a doubly-fed wind power system. The method comprises the steps of: determining a control instruction of a converter in the doubly-fed wind power system according to a frequency deviation of the power grid; generating PWM pulse signal of the converter in the doubly-fed wind power system according to the control instruction; andemploying the PWM pulse signal to control the converter in the doubly-fed wind power system. According to the technical scheme of the invention, the inertia level and the inertia effect of the doubly-fed wind power system can be enhanced, the inertia level of the power system after wind power integration is improved, and the demands on the energy storage capacity and the energy storage cost are reduced.

Description

technical field [0001] The invention relates to the field of inertia control of a doubly-fed wind power system, in particular to a control method and device for a converter in a doubly-fed wind power system. Background technique [0002] In recent years, the proportion of wind power in the power system has increased sharply, which has caused a series of major technical challenges related to the safety and stability of the power grid. One of these is the significant reduction in grid inertia levels resulting from high wind power penetration. Different from conventional large inertia synchronous generators, variable speed wind turbines (VSWT) are connected to the public grid through low inertia back-to-back power electronic converters. The main function of the converter is to realize the maximum capture of wind energy and stable grid connection. Under the principle of maximum power tracking operation, decoupling operation is realized between the fan speed and the grid freque...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/386Y02E10/76
Inventor 胡安平李官军杨波陶以彬桑丙玉崔红芬余豪杰庄俊葛维春张艳军李振宇
Owner CHINA ELECTRIC POWER RES INST
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