IECON 2011 - 37th Annual Conference - Melbourne

Event Information

Start Date: 7 Nov, 2011
End Date: 10 Nov, 2011
Location: Crown Conference Center, Melbourne, Australia
Booth # 15

Technical Papers Presented By Opal-RT

This paper presents real-time simulation results of a switched reluctance motor (SRM) drive with a novel Torque Distribution Function (TDF) for high-speed applications, in order to reduce torque ripple. The SRM is fed by a three-phase unidirectional power converter having three legs, each of which consist of two IGBTs and two freewheeling diodes. The SRM model incorporates all non linearities between excitation currents, rotor position and flux linkages. For the purpose of control SRM drives, an improvement of the TDF method is proposed for high-speed applications, in order to reduce torque ripple. The real-time simulation of the drive is conducted on the RT-LAB real-time simulation platform. Since the converter is current controlled, the simulator latency is critical to achieving good accuracy and to avoiding current overshoot. The paper demonstrates that this type of drive with simple hysteresis current control can be simulated in real-time at a time-step of 15µs, with good accuracy. The paper also introduces FPGA-based simulation technology required to test advanced algorithms like TDF.

This paper details a Smart Grid Laboratory for the study of modern house distribution systems with multiple energy sources and energy regeneration capability. The laboratory is designed to perform real-time simulation of a realistic distribution system connected to multiple houses. In addition, a real house with typical appliances and power sources is connected to the eMEGAsim real-time simulator with a Power- Hardware-In-the-Loop (PHIL) interface. Such PHIL interface enables the simulation of a simulated plant and real devices at a connection point where actual energy is exchanged between the two parts. Because of the coupling delays and the bandwidth of the plant and real devices, the stability of such a PHIL connection is not guaranteed. This paper will have a special emphasis on the stability of such power-HIL simulation.