Abstract
AbstractDuring normal operation, doubly-fed induction generator (DFIG) can generate certain range of reactive power according to the requirements of the power grid. According to the active power order from power dispatching center, a kind of wind turbines scheduling solution which also suits the actual operation situation of “three-north” area wind farms in China is proposed. This solution makes it possible for the wind farm to generate the maximum reactive power or the certain reactive power below the maximum reactive power which will meet the needs of the power grid by adjusting output active power and reactive power of each DFIG. Based on the DFIG reactive power limit, this paper proposes two theorems and an allocation algorithm to find out the active power dispatch plan. This plan avoids the grid side converter switch devices frequently action. The active power and reactive power generated by the wind farm can both satisfy the power grid's needs and provide a reference for the capacity of additional r...
Highlights
China wind power industry has developed rapidly in recent years
This paper studies the ability of the doubly-fed induction generator (DFIG) based wind farm inherent reactive power compensation
This paper mainly finds out the reactive power limit of wind farm by adjusting active power generated by every DFIG
Summary
China wind power industry has developed rapidly in recent years. wind power installation capacity of China is greater than that of the United States and has become the top of the world. Most scholars have focused on the additional reactive power compensation device, such as its capacity[18] or control strategy based on some objective functions[19,20,21,22]. They usually do not take the wind power curtailment into account. According to the active power order from power dispatching center, a scheduling scheme about how to distribute active power and reactive power among all wind turbines with double fed induction generators is proposed This scheme in accord with actual operation situation in “three-north” area wind farms in China and the reactive power generated by wind farm can be controlled. If the reactive power generated by wind farm can meet the power grid’s demand, the additional reactive power compensation device does not need to work, so this scheme reduces the operation cost and the switching on/off times of additional reactive power compensation device
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