Abstract
AbstractIn normal operation, doubly-fed induction generator (DFIG) can generate certain range of reactive power and the DFIG based wind farm can participate in reactive power control of grid as a reactive power supply. This paper proposes one multi-objective power dispatch optimization model which considers copper loss minimization of all DFIGs in wind farm and maximization reactive power margin of every DFIG. The active power and reactive power generated by wind farm can meet the power gird requirements of both active power and reactive power. This wind farm power dispatch model will cause more economic benefit and bring more reactive power margin to every DFIG. The advantages and validity of the proposed method have been verified in the case study.
Highlights
Wind power industry develops rapidly in China
This paper studies the ability of the doubly-fed induction generator (DFIG) based wind farm inherent reactive power compensation problem and proposes a power dispatch plan based on two objective functions
This paper takes reactive power value which makes grid optimal operation as QN, the main work is to find a reactive power dispatch plan which will minimize the losses of all DFIGs in wind farm and keep every DFIG enough reactive power margin
Summary
Wind power industry develops rapidly in China. the wind power capacity of China is greater than that of the United States and has become the largest in the world. The studies of the DFIG based wind farm reactive power generating capacity and reactive power scheduling problem are very meaningful. A reactive power dispatch principle according to the reactive power limit of each DFIG in the wind farm was proposed [8, 12]. This paper studies the ability of the DFIG based wind farm inherent reactive power compensation problem and proposes a power dispatch plan based on two objective functions. This plan makes the working condition of all DFIGs stay in the optimum states and makes full use of every DFIG reactive power regulation ability. In the following case study, the advantage of the proposed plan will be verified
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