A method for adjusting reactive power of wind turbines in case of wind farm remote control failure

An adjustment method and technology for wind farms, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve the problems of wind farm grid-connected voltage fluctuation, wind farm grid system collapse, oscillation and other problems

Active Publication Date: 2014-10-08
GUODIAN UNITED POWER TECH
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Problems solved by technology

Remote control failure: If the central control server crashes or when the wind field optical fiber ring network communication fails, the reactive power adjustment of the wind turbine will lose the adjustment target of the entire field, and the imbalance of reactive power deployment will lead to fluctuations in the grid-connected voltage of the wind farm or cause abnormal Necessary oscillations, even leading to the collapse of the wind farm grid system

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  • A method for adjusting reactive power of wind turbines in case of wind farm remote control failure

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Embodiment Construction

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] The invention provides a wind farm reactive power adjustment method when remote control fails, including a remote control failure judgment mechanism, a remote control failure triggering remote control and stand-alone mode conversion mechanism, and a stand-alone reactive power adjustment mode calling mechanism. The remote control fault judgment mechanism includes the remote control fault judgment conditions and the software handshaking mechanism between the central control and the wind turbine; the remote control and stand-alone mode conversion mechanism caused by the remote control fault is used to ensure the system's reactive power adjustment fluctuations. The calling...

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Abstract

The invention discloses a reactive power regulation method for fans in a wind power farm under remote-control failure condition. The reactive power regulation method comprises a judgment mechanism of remote-control faliures, a conversion mechanism of a remote-control failure occurance trigger remote control mode and a one-machine mode, and a calling mechanism of a one-machine reactive power regulation mode, which are all triggered to be executed according to a certain time order in sequence, wherein the one-machine reactive power regulation mode is as follows: setting an active power-reactive power relationship curve of each fan in the wind power farm; and performing one-machine reactive power regulation according to change rules of the curve, wherein the curve is obtained by analyzing long-time operation record data of one fan in a whole regulation mode under a normal remote-control state. The reactive power regulation method has a good reactive power supporting capability in a remote-control failure state, and stablility of the bus voltage of the wind power farm under a remote-control failure condition can be guaranteed and a stable power grid is maintained.

Description

Technical field [0001] The invention relates to the field of reactive power adjustment methods, in particular to a method for reactive power adjustment of a wind turbine when a wind farm remote control fails. Background technique [0002] According to preliminary statistics, in 2011, China’s newly installed wind power capacity was close to 18 million kilowatts, and the total installed capacity reached 65 million kilowatts. China is already the world's largest wind power equipment manufacturing country and the country with the largest wind power installed capacity, and it has become a veritable wind power country. As the proportion of wind power in the grid capacity continues to increase, this not only objectively requires wind turbines to provide reactive power support when the grid fails, but also power quality and voltage problems, and large-scale wind power sources cause the grid Instability and other issues. The uneven distribution of wind resources in our country will make ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 赵广宇黄涛李宝金
Owner GUODIAN UNITED POWER TECH
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