Research on Mass Imbalance Fault of Wind Turbine Based on Virtual Prototype

Ping Zhao,Liu Yang,Xiaoguang Li,H.L Yuan,P Tandon,R.K Agarwal,E.X Wang

doi:10.1051/matecconf/20179506001

Abstract

Wind turbine virtual prototype was set up with SIMPACK software. The influence of different mass in different blades was researched by changing size and position of imbalance mass. Results showed that the period of imbalanced moment inducted by different size of imbalance mass imposing blades at different position was the same as the wind turbine rotor, but the amplitude and phase was different. Electricity generation during starting was associated with not only the size of mass but also the position. After starting, wind turbine would keep the stable state in simulation, power and revolution speed and pitch angle curves would wave periodically, the periods were all the same as the wind turbine rotor, the size of imbalance masses were bigger, the fluctuation amplitude of curves were greater.

Highlights

In recent years, wind energy, as a new, safe and reliable, clean energy, has been given more and more attentions and large-scale developed by international which possess abundant resources[1,2]
Many researchers have carried out relevant researches aim at impeller imbalance faults of wind turbine generator set
JIANG [6,7] carried out experiments aimed at three malfunction of impeller including mass imbalance, asymmetric aerodynamic force, yaw misalignment, using way which is based on vibration spectrum analysis to research on main shaft vibration of impeller caused by mass imbalance

Summary

Introduction

Wind energy, as a new, safe and reliable, clean energy, has been given more and more attentions and large-scale developed by international which possess abundant resources[1,2]. The research methods above are mainly based on two class methods, one of it is a fault diagnosis method based on vibration, and this method need to install a large number of sensors, low reliability, but high costing Another one is based on simulation analytical calculation, modeling and simulation of faults can make a more profound understanding of malfunction formulation mechanism and influences, and it will be easier to proceed calculation and comparison for different malfunction signal, this kind of simulation is based on physical parameters used of wind turbine without considering dynamical behavior of the wind turbine, and neither do consider the relevant connected relations and coupling of impeller, transmission chain and tower-silo, so that this simulation can only aim at one physical quantity of electric power. Electric power in theory, and wind turbine real simulation was set up with many-body dynamics software of SIMPACK, makes simulation on location distribution on wind turbine of imbalance mass and mass of different size to load on the same direction of same impeller to research on the influences it makes on generator power, rotate speed and blade variable pitch respectively

Wind turbine mass imbalance moment

Virtual prototype model

Simulation of applying imbalance mass to different blade

Conclusions