영구자석형 동기발전기를 이용한 풍력 시뮬레이터 개발에 관한 연구

Abstract

The wind energy conversion system has become an important part of the wind turbine systems. The study on a development of wind turbine simulator and a control strategy of wind turbine system with Permanent Magnet Synchronous Generator which is grid connected with back-to-back power converter has been done. Using Kaimal Spectrum model that is recommended by IEC61400-1 3rd edition, aerodynamic characteristics of blade and rotor, the dynamic parts of the simulator can be defined. Blade which is 5-MW Reference Wind turbine of NREL is applied and simulated on PC. The computer based simulation model is composed into 22kW induction motor that is used to replace dynamic parts and 11kW permanent magnet synchronous generator. Electrical part of the simulator is composed of motor driving inverter and grid-connected full-converter and their own controllers. A control strategy from the blade data as a variable-speed variable-pitch generator and gave specific cases of winds that drive dynamic parts and then observed the active power and generator-side torques and speeds. The wind turbine control strategies and full-converter control are simulated in PSIMⓒ. Actually FOC(Field Oriented Control) method and Torque versus Speed look-up curve called as ‘Control Strategy’ are used to control the system. The main controller is a Texas Instruments’ TMS320F28335 MCU. Other peripheral circuits and the motor driving algorithms were developed for this study. Finally the developed device is verified by experimental results.