Abstract
It has been confirmed that the voltage flicker due to the connection of a sole small wind turbine (SWT) is not so severe in general. However, the voltage flicker due to the connection of multiple SWTs is a great concern. Thus, the measurement of the output power and voltage flicker at the point of common coupling of four SWTs has been conducted. Furthermore, correlation coefficients among output power fluctuations of respective SWTs have been analyzed. As a result, it was confirmed that output power fluctuation of SWTs is almost independent on the higher frequency components than 2 Hz, and the voltage flicker by a few 5-kW class SWTs is not so severe at least.
