ELECTROMOTION 2009 - EPE Chapter "Electric Drives"
Event Information
Start Date: 01/Jul/2009
End Date: 07/03/2009
Location: Lille, France
Link: http://electromotion2009.fr/
Technical Papers Presented By Opal-RT
A Real-Time Regulator, Turbine and Alternator Test Bench for Ensuring Generators Under Test Contribute to Whole System Stability Paper has been accepted for ELECTROMOTION 2009 - EPE Chapter "Electric Drives"
A new Test Bench for speed governors has been developed and successfully tested in a simulation laboratory and in a Hydro-Québec hydroelectric powerhouse. Equipped with a Real-Time Simulator, the RT-LAB BERTA Test Bench makes it possible to cause the speed governor and turbine to react as though they are operating in an islanded power system, while remaining connected to the main grid. This ensures that the generating unit under test actually contributes to the stability of the whole power system. On-site testing has demonstrated that previous speed governor settings which were thought to be very stable were in fact generating undesirable power oscillations. Through the use of the proposed Test Bench, more accurate settings can be made on-site without the need to conduct laborious analyses.
This paper presents a simulation model of a 3-level Neutral-Point Clamped IGBT inverter bridge suitable for real-time simulation testing of Variable Speed drives. The model is based on the switching-function approach, but also implements natural switching modes like Hi-impedance and rectification when no pulses are applied to the inverter. The model can manage a Pulse Width Modulation (PWM) with a sample period to PWM period ratio up to 0.1 while remaining accurate through the use of interpolation methods. The switching-function approach produces exceptional computational speed gain when compared to piecewise time-segment linear algorithms such as MATLAB/Simulink using the SimPowerSystems or PLECS libraries and can allow these simulations to be conducted in real-time at sample times of 40μs. Real-time simulation results including Hardware-In-the-Loop (HIL) applied to electrical power conversion systems for Marine applications are presented in the paper.
