Open AccessFuzzy Logic based Digital Hydraulics Control of Blade Pitch Angle in Wind Turbines
Author(s) -
Vignesh Narayanan,
R. Ramakrishnan
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1123/1/012019
Subject(s) - pid controller , turbine , pitch control , wind power , controller (irrigation) , engineering , hydraulics , bandwidth throttling , control theory (sociology) , hydraulic machinery , control engineering , automotive engineering , computer science , mechanical engineering , aerospace engineering , electrical engineering , temperature control , control (management) , agronomy , artificial intelligence , gas compressor , biology
Pitch control system is generally employed in wind turbine to mitigate load and maintain uniform power generation at above-rated wind speed regions. Hydraulic system has more power to weight ratio and so it is incorporated in the pitch system of large scale wind turbines. Some of the issues related to the usage of conventional valves in Hydraulic Pitch System (HPS) are: internal leakage, throttling losses, high power loss, less fault-tolerant, requires high manufacturing tolerance and more sensitive to contamination. In order to overcome these issues, digital hydraulics technology should be introduced as Digital Hydraulics Pitch System (DHPS). Commercially, Proportional Integral Derivative (PID) controller is used as pitch controller but these controller performance doesn’t hold good when excessive disturbance or change in operating point occurs in the system. So, heuristic-based Fuzzy Logic Controller (FLC) is preferred which has the ability to surpass the PID problems. In this paper, heuristic FLC based control strategy is proposed for a novel DHPS configuration to control the pitching action. Simulation model of DHPS is developed and system simulations are conducted. The comparative study on the effectiveness of FLC for DHPS and conventional valve controlled HPS is conducted.