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Concentrated fault traversing device for wind power station

A fault ride-through and wind farm technology, applied in wind power generation, motor generator testing, reactive power compensation, etc., to achieve the effect of convenient testing, convenient detection, and convenient movement

Active Publication Date: 2012-10-17
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For wind farm centralized fault ride-through devices, because the capacity of the wind farms it adapts to is generally tens of megawatts, there is currently no low-voltage ride-through detection device with sufficient capacity to adapt

Method used

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  • Concentrated fault traversing device for wind power station
  • Concentrated fault traversing device for wind power station
  • Concentrated fault traversing device for wind power station

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Experimental program
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Embodiment Construction

[0037] Attached below image 3 The specific implementation of the present invention will be further described in detail.

[0038] The wind farm concentrated fault ride-through device provided by the present invention is suitable for wind farm fault ride-through composed of fixed-speed asynchronous wind turbines. The device can work in wind farm operation mode and unit test mode respectively. In the wind farm operation mode, the device will ensure that the wind farms composed of fixed-speed asynchronous wind turbines within the coverage area meet the requirements in the "Q / GDW-2009 Technical Regulations for Wind Farm Access to the Power Grid" and the European and American wind power grid-connection guidelines. The specified wind farm low voltage ride through capability requirements; in the unit test mode, the device can meet the requirements for equivalent low voltage ride through capability detection of a single fixed-speed asynchronous wind turbine.

[0039] The wind farm central...

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Abstract

The invention relates to a concentrated fault through device for a wind power station. The device can respectively work in a wind power station running mode and a unit test mode, and is arranged in a container mode or a container combined with outdoors mode. The device comprises transient voltage supporting parts, a transient reactive injection part and a power discharging part, wherein the transient voltage supporting parts are connected in series and arranged between the concentrated grid point of the wind power station and the concentrated collection line of a fan in the wind power station; the branches of the transient reactive injection part and the branches of the power discharging part are connected in parallel and linked on the concentrated collection line of the fan in the wind power station. The device are respectively divided into a steady-state running state and a transient-state running state in the wind power station running mode and the unit test mode, and certain master devices are multiplexed in the two modes, so that the covered wind power stations consisting of constant-speed asynchronous wind motor units can meet the demand of low-voltage through capability specified by the national standard and the U.S. and European wind power grid standards. When the running modes of the device are switched, the wind power station does not need to be in power failure.

Description

Technical field [0001] The invention belongs to the field of new energy grid connection testing, and specifically relates to a wind farm centralized fault ride-through device. Background technique [0002] With the increasing proportion of wind power generation in electric energy, the impact of wind power generation systems on the safe and stable operation of the power grid cannot be ignored. According to statistics: Since 2011, 35 wind turbines have been disconnected from the grid in the business area of ​​power grid companies, and more than 3,800 wind turbines have been disconnected from the grid. This has seriously affected the safe and stable operation and reliable power supply of the power grid, and has also made wind power generation a clean energy source. Promotion and application are restricted. [0003] One of the important reasons for large-scale off-grid accidents of wind turbines is that many wind farms currently do not have low voltage ride-through capability. Faced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/18G01R31/34
CPCY02E10/763Y02E40/30Y02E10/76
Inventor 张振环徐桂芝贾跟卯段全新雷晰刘洋崔大伟张拓
Owner STATE GRID CORP OF CHINA
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