660kW 풍력터빈의 난류강도에 따른 운전특성

Abstract

As a wind turbine operators, the operating characteristics and power variability of wind turbines are major concern. Wind turbines are operate by extreme winds and their operating characteristics are varied by turbulence. Understanding the Operating characteristics of wind turbines can help ensure stable operation of wind turbines and provide information to improve wind turbine systems. The wind turbine is a 660kW wind turbine (Vestas V47) installed in Hangwon of Jeju Island and operated by jeju National University. This wind turbine hub height is 45m, the rotor diameter is 47m, and the Fixed speed variable pitch type(FS-VP). The operation data collected from SCADA system of the target wind turbine during the first half of 2017 (January to June) and determined the disturbed sector according to Annex A of IEC 61400 12-1. The wind speed of the nacelle anemometer is disturbed by the influence of the rotor. Therefore, according to IEC 61400-12-2, NTF(Nacelle Transfer Function) is applied to obtain more accurate wind speed. Using the NTF data, analyze the power, rotation, blade pitch and temperature of the main parts by wind speed and observed to change of operation characteristics after main parts were replaced. In order to confirm the change of operating characteristics due to the turbulence, Based on turbulence intensity C-Class of the wind turbine class parameter of IEC 61400-1 (ed. 3), higher than Class C is defined as HTI(High turbulenc intensity) and under than Class C is defined as LTI(Low turbulence intensity). The turbulence Class data were analyzed to power and power coefficient, rotor speed, pitch angle by defined HTI, LTI.