A Countermeasure against the Voltage Sag due to a Inrush Current of Wind Power Generation System Interconnecting to a Distribution Line

In recent year, enhancement of consciousness for problem of environment is advancing effective use of natural energy, such as wind power generation system. Induction generators are almost employed in the generation system due to saving of cost and maintenance. When the generator is interconnecting to a distribution line, high inrush current is fed from the line to the generator. Since the current causes momentary sag on the line, a countermeasure must be taken. The paper describes a study of interconnecting technique of induction generator to a distribution line. Authors had studied phenomenon of momentary sag on a distribution line due to high inrush current of a induction generator and a countermeasure against the voltage sag.