Electricity: single generator systems – Automatic control of generator or driving means – Fluid pressure including wind
Reexamination Certificate
2008-04-14
2009-12-29
Ponomarenko, Nicholas (Department: 2834)
Electricity: single generator systems
Automatic control of generator or driving means
Fluid pressure including wind
C322S036000, C322S037000
Reexamination Certificate
active
07638984
ABSTRACT:
A method for the operation of a wind energy plant, with control of a reactive electric variable which is to be provided, wherein a desired value for the reactive electric variable is determined as follows: a first upper and/or a first lower limit value of the grid voltage is defined for the grid voltage, when the real value of the grid voltage exceeds the first upper limit value and/or the real value of the grid voltage falls below the first lower limit value, the desired value of the reactive electric variable is increased or diminished such that the deviation of the real value of the grid voltage from its desired value is counter-acted, wherein the desired value of the reactive electric variable is continuously increased or diminished further over the time, as long as the real value of the grid voltage exceeds the first upper limit value or falls below the first lower limit value.
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“Reactive power control of wind farms for voltage control applications” by A Tapia, et al,Renewable Energy, www.elsevier.com; pp. 377-392.
Harder Ralf
Jurkat Mark
Richter Kay
Mohandesi Iraj A
Nordex Energy GmbH
Ponomarenko Nicholas
Vidas Arrett & Steinkraus P.A.
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