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풍력발전시스템에서 풍속 추정을 이용한 최대 출력 제어

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Alternative Title
Maximum power control using wind speed estimation in wind power system
Abstract
Variable-speed wind power system is controlled by optimal tip speed ratio between angular speed of the blade and wind speed to track maximum power point. Conventional method of using anemometer to measure wind speed is expensive. Moreover, the measured wind speed and the wind speed that is applied to turbine blades are different depending on the position of anemometer. For these reasons, control methods using wind speed estimation based on Kalman filter and Newton-Raphson method are employed to estimate the wind speed. But the parameters that are used for wind speed estimation are changed due to degradation of generator and blade shape. Also, the air density is changed continuously. This causes not only inexact maximum power point tracking but also inaccurate wind speed estimation. In this paper, to solve this problem, an maximum power control algorithm is proposed to wind power system based on wind speed estimation. A correction factor is introduced to consider the changes in blade shape, air density and generator efficiency. The correction factor reduces the error in estimated tip speed ratio thereby estimating the wind speed with better accuracy. Also, maximum power point is tracked.
For the simulation, wind power system based on wind speed estimation with the proposed algorithm considering converter control is designed using Matlab/Simulink and the performance of wind power system is validated with constant and variable wind speed. The results show that the adaptive MPPT control has better estimation of wind speed from the correction factor that is computed
Author(s)
현종호
Issued Date
2015
Awarded Date
2016. 2
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007424
Alternative Author(s)
Hyun, Jong Ho
Department
대학원 풍력공학부 풍력전기·제어시스템전공
Advisor
김경윤
Table Of Contents
제 1 장 서 론 1

제 2 장 풍력발전시스템 4
2.1 풍력 에너지의 이론적 배경 5
2.2 최대 출력 제어 방법 6

제 3 장 풍력발전시스템 설계 9
3.1 풍력발전시스템 모델 9
3.2 칼만 필터를 이용한 기계적 출력 추정 11
3.3 뉴턴-랩슨법과 보간법을 이용한 주속비 추정 12
3.4 풍속 추정을 이용한 풍력발전시스템 모델 14

제 4 장 최대 출력 제어를 수행하기 위한 알고리즘 제안 16

제 5 장 시뮬레이션 결과 20
5.1 Matlab/Simulink 모델 20
5.2 칼만 필터와 뉴턴-랩슨법을 이용한 추정기 성능 21
5.3 제안된 알고리즘을 적용한 시뮬레이션 결과 21
제 6 장 결론 26

참 고 문 헌 27
Appendix A Matlab/Simulink 모델과 코드 29
Degree
Master
Publisher
제주대학교 대학원
Citation
현종호. (2015). 풍력발전시스템에서 풍속 추정을 이용한 최대 출력 제어
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Faculty of Wind Energy Engineering > Wind Power Electricity and Control System Engineering
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