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

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 ...

AI Technical Summary

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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