Abstract
Wind turbines operate in strong wind conditions, which are generally irregular and unsteady. The previous paper reports a study on two wind turbine generator systems having different types of control methods at a site. It discusses the characteristics of these wind turbines with respect to their control methods by clarifying the relationship between wind parameters and various electric parameters under steady wind conditions. Wind behavior can change drastically, particularly in the transition of output power, for instance when a wind turbine starts up or stops. Therefore, understanding the transient behavior of various electric parameters is beneficial in comprehensively evaluating the performance of a wind turbine generator system. This paper further reports on the same two wind turbine generator systems. Their electric parameters when the output power of the turbines is changed are measured and their performances during their transient state are also discussed.
