Jean Bélanger

A Real-time Dynamic Simulation Tool for Transmission and Distribution Power Systems

Publication date : Jul 2013
Paper File : ePHASORsim_PES_2013.pdf



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Author(s)

Vahid Jalili-Marandi, Fábio Jose Ayres, Esmaeil Ghahremani, Jean Bélanger, Vincent Lapointe,

Abstract

ePHASORsim tool offers real-time dynamic simulations for transmission and distribution power systems. Applications such as contingency studies, testing control devices, operator training, and SCADA system tests are examples for employing this tool. This paper describes the hardware and software architecture of the ePHASORsim and its development. The accuracy of the tool has been evaluated in comparison to other commercial, but non-real-time, simulation packages for both transmission and distribution systems. Its real-time performance has been tested with a time-step of 10ms on a real-time simulator for large-scale power systems in the order of 20000 buses, 5000 generators, and over 9000 control devices.

Real-time Electromagnetic and Transient Stability Simulations for Active Distribution Networks

Publication date : Jul 2013
Paper File : IPST_2013 Vahid.pdf



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Author(s)

Vahid Jalili-Marandi, Fábio Jose Ayres, Christian Dufour, Jean Bélanger,

Abstract

This paper presents the solutions of a real-time parallel-processing based simulator, eMEGAsim, to perform electromagnetic transient and transient stability simulations for distribution power networks. The electromagnetic transient simulation can be distributed into several processors without adding an artificial delay, and the transient stability simulation tool can model three-phase unbalance systems. The simulator provides a flexible environment to interface discrete-time and phasor domains to create a hybrid simulation.

A Survey of Smart Grid Research and Development Involving Real-Time Simulation Technology

Publication date : Apr 2013
Paper File : IEEESmartGrid_Portugues_FinalFinal.pdf



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Author(s)

Christian Dufour, Simone Araújo, Jean Bélanger,

Abstract

This paper discusses the various aspects involving the research and development of smart grids. Discussed are applications going from large grid renewable integration, systems to micro-grids. Load scheduling and power balance, communications issues, understanding customer behavior, large area protection, distribution control are only some aspects of the challenge of making power grids more robust, more intelligent. The potential complexity of such smart grids requires careful study and analysis before actual realization. This paper explains how such challenges are addressed using real-time simulation technologies in different laboratories around the world.

FPGA-based Switched Reluctance Motor Drive and DC-DC Converter Models for High-Bandwidth HIL Real-Time Simulator

Publication date : Mar 2013
Paper File : EPE2013_FPGA Motor Drive.pdf



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Author(s)

Jean Bélanger, Sébastien Cense, Christian Dufour,

Abstract

In this paper, we describe an FPGA implementation of a Switched Reluctance Motor Drive (SRM) and a DC-DC bidirectional boost converter targeted for Hardware-In-the Loop (HIL) testing of modern SRM controllers. These FPGA models allow the HIL simulation of SRM drive and boost converter with switching frequencies in the 50-100 kHz range because of the very high sampling rate of the FPGA. The models are also integrated into the RT-LAB real-time environment and directly linked with the simulator I/Os, providing ultra-low HIL gate-in-to-current-out latency, suitable for the testing of modern motor controllers.

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.

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.

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

Publication date : Nov 2011
Paper File : A Novel and Flexible Test Stand for Medium Voltage Drives Using a Hardware-in-loop (HIL) Simulator.pdf



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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.

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

Validation of a 60-Level Modular Multilevel Converter Model - Overview of Offline and Real- Time HIL Testing and Results

Publication date : Apr 2011
Paper File : Validation of a 60-Level Modular Multilevel.pdf



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Author(s)

Wei Li, Luc-André Gregoire, Laurence Snider, Jean Bélanger,

Abstract

In this paper, full real-time digital simulation of a static modular multilevel converter (MMC) HVDC link interconnecting two AC networks is discussed. The converter has 60 cells per arm; each cell has two power switches with antiparallel diodes and one capacitor. The simulated model can be used to study the natural rectifying mode, which is very important in the energizing process of the converter, whether a ramping voltage or a charging resistance is used. The model also incorporates a simple controller to show the system behavior in different operating conditions. The converter model and the controller are simulated on two independent real-time simulators and connected though their respective IO and physical signal cables to perform Hardware-in-the-Loop testing. All capacitor voltages are supplied to the controller using digital to analog converters. Firing signals from the controller are sent using digital signals with opto-couplers, as would be the case with a real setup. By doing so, a Hardware-in-the-Loop (HIL) simulation is obtained. The main challenges of this setup are the very high number of IOs, which reaches over 730, considering both controller and converter, and the processing power required to simulate the 360 cells within a small time-step of 50 μs or less, as required for electromagnetic transient analysis. The simulation is achieved with a time-step of 20 μs using 10 INTEL 3.2-Ghz processor cores. Different faults are applied to determine their effects on the controller and the converter. In order to produce results that are as realistic as possible, a saturable transformer is used; the impact is particularly noticeable during faults and unbalanced load. The real-time digital simulator used is based on MATLAB, SIMULINK, SimPowerSystems and eMEGAsim.

A Combined State-Space Nodal Method for the Simulation of Power System Transients

Publication date : Apr 2011
Paper File : A Combined State-Space Nodal Method for the Simulation of Power System Transients.pdf



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Author(s)

Jean Mahseredjian, Jean Bélanger, Christian Dufour,

Abstract

This paper presents a new solution method that combines state-space and nodal analysis for the simulation of electrical systems. The presented flexible clustering of state-space described electrical subsystems into a nodal method offers several advantages for the efficient solution of switched networks, nonlinear functions and for interfacing with nodal model equations. This paper extends the concept of discrete companion branch equivalent of the nodal approach to state-space described systems and enables natural coupling between them. The presented solution method is simultaneous and allows to benefit from the advantages of two different modeling approaches normally exclusive from one another.

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