BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCŢII DE MAŞINI
DYNAMIC ANALYSIS OF MECHANICAL-HYDRAULIC
PROTECTION MECHANISMS OF LOW POWER HORIZONTAL
AXIS WIND TURBINES THROUGH VERTICAL TILTING
BY
DORU CĂLĂRAŞU, IRINA TIŢA, DAN SCURTU
and BOGDAN CIOBANU
Abstract. Generally, the control system a wind turbine is equipped with is
designed to reduce dynamic load on its blades, to increase turbine reliability and
operational safety. The paper present the dynamic analysis of a mechanicalhydraulic
protection mechanism used for low power HAWT. The method consists
of the vertical tilting of the wind turbine. The analysis of the system responses
revealed a good dynamic performance when using the vertical tilting solution
chosen to protect low power HAWT.
Key words: HAWT, protection mechanism, vertical tilting.
1. Introduction
The control system a wind turbine is equipped with is designed to reduce
dynamic load on its blades, to increase turbine reliability and operational safety.
This system is one of the most important developments meant to consistently
improve low power horizontal axis wind turbines.
Further to the analysis of control and protection system design models used
for low power horizontal axis wind turbines (HAWT), the best constructive
solution was chosen, which consists of the vertical tilting of the wind turbine.
The tilting begins when the wind speed exceeds the speed limit beyond which
the turbine safety may be jeopardized. This solution meets the system
requirements: it is reliable, it does not include electrical drive components, it
has no built-in electronic devices and it does not require the existence of a
hydraulic drive system.