Reactive power regulation method for fans in wind power farm under remote-control failure condition

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 reactive power adjustment method of a wind farm when the remote control of a wind farm fails. Background technique [0002] According to preliminary statistics, in 2011, China’s newly installed wind power installed capacity was close to 18 million kilowatts, and the total installed capacity reached 65 million kilowatts. With the increasing proportion of wind power in the grid capacity, it not only objectively requires wind turbines to provide reactive power support when the grid fails, but also problems with power quality and voltage, and large-scale wind power sources cause grid failure. issues of instability. The unbalanced distribution of wind resources in my country will inevitably put forward higher requirements for the power quality of wind turbines and reactive power support for power grids. At the beginning of 2012, my country's State Grid promulgated ...

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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