Assessment of Wind Turbine Installation and Evaluation on Wind Power Generation Using On-Site Wind Data

Abstract

This research initially assesses wind turbine installation to select a suitable wind turbine The default location is at the “Medium and Small Wind Turbine Testing Laboratory” which is next to the Salt Mountain tourist area in Cigu Tainan In order to measure wind data a 13m height small meteorological mast was erected to install cup anemometers and wind vanes Then statistical wind data was fitted using a Weibull distribution to calculate the energy production of the turbines and then an analysis and discussion of how to choose a suitable turbine in view of internal rate of return (IRR) and payback period were conducted Nevertheless an economical turbine is relevant to initial capital cost All of the selected turbines were required to be certified by international certification bodies and to conform to IEC 61400 Another part of the research was an evaluation of wind power generation Data from two large wind turbines was acquired from the Supervisory Control and Data acquisition (SCADA) system deployed in the Taoyuan Tatan District The SCADA data include the blade angular velocity turbine yaw angle and power production recorded as a 1 minute average value At the same time the LEOSPHERE WINDCUBE v2 LiDAR system was used to measure wind speed and direction in the field The approach was based on the Doppler Beam Swinging method to collect the light-of-sight wind speed In this method four beams are successively sent along a 28° cone angle in four cardinal directions followed by a fifth vertical beam sent to measure vertical velocity directly The resolution of the 1 minute average wind data from LiDAR is 15 records per minute Wind speed data below 2m/s was removed after verification and an analysis of turbulence intensity and then a regression analysis was conducted to compensate for the yaw angle By making interactive comparisons between wind direction and the compensated yaw angle the power curve of the different inflow angle to blade rotations was obtained Finally the statistics show that the turbine averaged power output will result in a considerable decline at an inflow angle greater than 15° and the influence is not less than the wake effect

Date of Award	2016 Jul 4
Original language	English
Supervisor	Ta-Hui Lin (Supervisor)