Special Field Measurement Results of an Onshore Wind Farm Connected to Power Grid of Taiwan Power System Subject to Typhoon Matmo

This paper studies and analyzes the power-quality measurement results due to the special operating characteristics of the wind turbines of a commercial onshore wind farm connected to the power grid of Taiwan Power System when Typhoon Matmo passed through Taiwan. This Kuan-Yuan onshore wind farm of 28.5 MW with 19 1.5-MW wind-turbine generator (WTG) based on doubly fed induction generator is connected to Kuan-Yin primary substation through two of four step-up main transformers of 161/69 kV, 200 MVA. The measured data were recorded from July 22, 2014 to July 29, 2014 for total seven days. During the measurement period, Typhoon Matmo just passed through Taiwan and the 19 WTGs were forced to stop. The power-quality measurement results due to the special operating characteristics of the wind turbines of the studied Kuan-Yuan wind farm subject to Typhoon Matmo were also recorded and studied. According to the measured results, the power quality of the studied Kuan-Yuan onshore wind farm during the measurement period can meet the grid code of Taiwan Power Company except the voltage flicker of ΔV10. The relationships of the recorded times and dates between the measured electrical quantities and power-quality results of the studied onshore wind farm and the Typhoon Matmo passed through Taiwan are also discussed.