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Our RT-LAB BERTA turbine, speed governor, generators, and islanded operation test bench puts high performance real time computing at the service of hydro electric and thermal plant operators to improve stability and save costs.
Key Features
  • Enables Measurement and Optimization of Speed Governor Parameters
  • HIL on actual operating systems allows more accurate parameter setting than off-line theoretical studies
  • Allows controller certification testing
  • Enables generating unit contribute to overall system stability and frequency recovery
  • Allows Testing Many Turbine Speed Governor Settings Without Threatening the Grid Stability
  • Validate speed governor and turbine dynamic models in a Closed Loop Set-up

This is a request to schedule an online demonstration of Power System Frequency Control with RT-LAB BERTA Turbine, Speed Governors, Synchronous Generators, and Islanded Operation Test Bench with an Opal-RT Representative.

Modeling and Control of a Full-Bridge Modular Multilevel STATCOM

Publication date : Feb 2012
Paper File : PES12_MMCSTATCOM.pdf



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Author(s)

Jean Bélanger, Wei Li, Luc-André Gregoire,

Abstract

Due to its unique topology, the Modular Multilevel STATCOM has many advantages but requires a sophisticated controller and puts higher requirements on simulation tools. To simulate the STATCOM in real-time is preferable because it enables hardware-in-the-loop test of the system in various scenarios including extreme fault conditions, which cannot be tested on a real STATCOM. This paper presents a model of full-bridge sub-module which enables fast offline and real-time simulation of the STATCOM. A control scheme with a new SM capacitor voltage balancing method is also proposed in this paper. The model and the controller are investigated for different operating conditions. Implemented in a real-time simulator, the model can be simulated in real time at a time step of 20 µs, 131 times faster than its reference model. As demonstrated by the results, the proposed control scheme is effective and robust.

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A Smart Distribution Grid Laboratory

Publication date : Nov 2011
Paper File : IECON2011_Smart_Distribution_Grid_Laboratory.pdf



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Author(s)

Wei Li, Toshifumi Ise, Takeiki Aizono, Jean Bélanger, Isao Iyoda, Christian Dufour, Amine Yamane,

Abstract

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.

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Real-Time Simulation and Control of ReluctanceMotor Drives for High Speed Operation with Reduced Torque Ripple

Publication date : Nov 2011
Paper File : IECON2011_real_time_Relultance_Motor_Drives.pdf



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Author(s)

Minh C. Ta, Christian Dufour,

Abstract

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.

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A Novel and Flexible Test Stand for Medium Voltage Drives Using a Hardware-in-loop (HIL) Simulator

Publication date : Nov 2011
Paper File : Not available yet

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Author(s)

Weihua Wang, Jean Bélanger, Christian Dufour, Ata Douzdouzani,

Abstract

With increasing complexity of topology and control strategies in medium voltage (MV) drives, a digital hardware-in-loop (HIL) simulator exhibits great advantage over a traditional analog test stand in terms of cost and flexibility. However, a great effort for developing a proper solver, an optimized design of the hardware, firmware and fine-tuning of the model is required to maintain sufficient accuracy of the HIL test stand. This paper presents the novel solver and the system architecture used by the HIL-simulation-based test stand for medium voltage drives. Test results of the ACS 6000 drives are shown under various conditions, and compared with the measurement acquired from the field testing.

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Modeling of a Multilevel H-Bridge STATCOM

Publication date : Nov 2011
Paper File : Modeling of a Multilevel H-Bridge STATCOM.pdf



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Author(s)

W. Li, V. Lapointe, L.-A. Grégoire,

Abstract

This paper proposes to model and simulate in real-time a multilevel STATCOM using H-bridge topology. The STATCOM is done using 20 cascaded H-bridge cells for each phase, and a total of 60 cells or 240 IGBTs and 240 anti-parallel diodes. The difficulty of such a model comes from the high number of power switches to simulate in real-time. Although the control algorithm is presented, this paper will emphasize on the real-time modeling and its accuracy when compared to a reference model.

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Control and Performance of a Modular Multilevel Converter System

Publication date : Aug 2011
Paper File : Control and Performance of a modular multilevel converter system.pdf



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Author(s)

Jean Bélanger, Luc-André Gregoire, Wei Li,

Abstract

The Modular Multilevel Converter (MMC) system has many advantages over conventional voltage source converters and therefore can be used in dc power transmission, micro grid, or renewable energy applications. While MMC’s distinctive topology offers many new features, it also necessitates a sophisticated controller to deal with extra control requirements. This paper presents a control scheme with multiple control objectives required by MMC, i.e. active and reactive power control, dc voltage control, sub-module capacitor voltage control and balancing, circulating current eliminating, and zero-sequence current eliminating. The system is modeled in an electromagnetic transients program, RT-LAB, and its dynamic performance is evaluated by time-domain studies using a real-time simulator, eMEGAsim. The results show the multiple control objectives are fulfilled and the system has fast response to control command and system dynamics

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RECONFIGURABLE FLOATING-POINT ENGINES FOR THE REAL-TIME SIMULATION OF PECS: A HIGH-SPEED PMSM DRIVE CASE STUDY

Publication date : Jun 2011
Paper File : RECONFIGURABLE FLOATING-POINT ENGINES FOR THE REAL-TIME.pdf



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Author(s)

T. Ould Bachir, J.P. David, J. Mahseredjian, J. Bélanger, C. Dufour,

Abstract

The real-time simulation of PMSM drives enables thorough testing of control strategies and allows rapid deployment of automotive applications. However, the simulation of power electronic circuits (PECs) in the context of a PC-based simulation is challenging for several reasons, and imposes a limit in the 1-5 KHz range to the achievable switching frequencies. As FPGA devices gain computing power, conducting the real-time simulation of PECs on chip becomes an attractive alternative. This paper demonstrates the feasibility of high-performance floating-point calculation engines aimed for the real-time simulation of PECs on high-end and low-cost FPGAs as well. The paper discusses emerging paradigms for reconfigurable floating-point computing that favor optimal performance and offer near double precision arithmetic at a minimal hardware cost. A proof of concept is proposed through the on-chip simulation of a 3-phase IGBT inverter drive capable of handling very high switching frequencies.

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Floating-Point Engines for the FPGA-Based Real-Time Simulation of Power Electronic Circuits

Publication date : Jun 2011
Paper File : Floating-Point Engines for the FPGA-Based.pdf



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Author(s)

Tarek Ould Bachir, Jean-Pierre David, Jean Mahseredjian, Christian Dufour,

Abstract

The real-time simulation of power electronic circuits is challenging for several reasons. A PC-based simulation can hardly achieve time-steps below 5-10 μs: this yields a limit on the maximal power electronic switching frequencies that can be accurately simulated using standard methods. This paper presents a design methodology for the hardware implementation of high-performance FPGA-based floating-point calculation engines aimed for the real-time simulation of power electronic systems. The power electronic circuits are modeled using the associated discrete circuit technique. A calculation time step of 100 ns is achieved for a boost converter, and the simulation results are validated against the SimPowerSystems library. The paper also discusses emerging paradigms for the FPGA-based floatingpoint computation that favor optimal performance and offer near double precision arithmetic at a minimal hardware cost.

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Tools for Analysis and Design of Distributed Resources—Part IV: Future Trends

Publication date : May 2011
Paper File : Not available yet

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Author(s)

V. Dinavahi, M. H. Nehrir, J. A. Martinez, X. Guillaud,

Abstract

Real-time testing of new and more sophisticated distributed resource interfaces during transients, representing the different physical parts (mechanical, thermal, hydraulic, chemical, electrical, electronics) of a nonconventional generator in a single platform, or analyzing the interactions of distribution systems with distributed generators, energy markets, and customer behaviors are scenarios that cannot be studied with current software packages. This paper analyzes the present status and discusses the future development of tools that could cope with these simulation challenges. This paper includes test cases that will illustrate the scope of some of these simulation tools.

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