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Control system for improving frequency support capability of wind turbine generator set by super capacitor

A technology of supercapacitor and frequency support, applied in the direction of motor generator control, wind turbine control, control system, etc., can solve the problems of fan stall, small inertia without frequency support, frequency secondary drop, etc., to achieve good reliability, The effect of improving the failure operation ability

Inactive Publication Date: 2016-06-01
STATE GRID GANSU ELECTRIC POWER CORP +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a control system that uses supercapacitors to improve the frequency support capacity of wind turbines to avoid the occurrence of problems such as fan stalls, frequency secondary drops, fatigue loads, etc., effectively solving grid-connected problems. The problem of small inertia and no frequency support of double-fed wind turbines

Method used

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  • Control system for improving frequency support capability of wind turbine generator set by super capacitor
  • Control system for improving frequency support capability of wind turbine generator set by super capacitor
  • Control system for improving frequency support capability of wind turbine generator set by super capacitor

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Embodiment Construction

[0025] In order to clearly understand the technical solution of the present invention, its detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, and there may be other implementations besides those described in detail.

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0027] Embodiments of the present invention provide a control system that uses supercapacitors to improve the frequency support capability of wind turbines, such as figure 1 as shown, figure 1 The present invention adopts the supercapacitor to improve the hardware structure diagram of the control system of the wind turbine frequency support ability, which is the hardware structure diagram of the...

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Abstract

The invention discloses a control system for improving the frequency support capability of a wind turbine generator set by a super capacitor. The system comprises a wind wheel, a gear case, a generator, a converter, a crowbar protection, a box transformer substation and the super capacitor, wherein the wind wheel, the gear case, the generator, the converter and the crowbar protection are orderly connected with one another; the box transformer substation is connected with a power grid; the super capacitor is added to a DC bus of the converter; the super capacitor is connected with the DC bus of a wind turbine converter through a DC / DC converter; and the super capacitor can carry out ordered charging and discharging and maintain the operating conditions according to the operating state of the wind turbine generator set, and has relatively good reliability.

Description

technical field [0001] The invention belongs to the field of wind power generation operation control, and in particular relates to a control system that uses a supercapacitor to improve the frequency support capability of a wind turbine. Background technique [0002] Modern wind turbines can be controlled by converters to achieve variable speed and constant frequency operation. The advantage of this control is that, under the premise of ensuring synchronization with the grid, the maximum capture of wind energy can be achieved through speed control according to the aerodynamic characteristics of the fan, and the power response speed Fast, it can be seen that the wind turbine is a non-synchronous power supply, and its mechanical speed is decoupled from the synchronous speed of the grid. This kind of control can take into account both wind energy capture and power generation quality under a strong grid, but there are major problems in weak grids, micro-grids, or systems dominat...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24F03D7/0284H02P9/10H02P2201/07F03D9/11H02J3/32H02J11/00H02J2300/28H02J3/381Y02E70/30Y02E10/72Y02E10/76H02J3/241H02P2101/15F03D9/25F03D17/00F03D7/028F03D7/047H02P9/46H02P2201/09H02P2201/11
Inventor 汪宁渤丁坤路亮周识远张琛李津陟晶李征摆念宗蔡旭韩自奋蔡游明
Owner STATE GRID GANSU ELECTRIC POWER CORP
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