Jean Bélanger
Publication date : Feb 2012
Paper File :
PES12_MMCSTATCOM.pdf
Authors
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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Publication date : Nov 2011
Paper File :
PCIM Europe 2012 MV drive abstract v3.doc
Authors
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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Publication date : Aug 2011
Paper File :
Control and Performance of a modular multilevel converter system.pdf
Authors
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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Publication date : Apr 2011
Paper File :
Validation of a 60-Level Modular Multilevel.pdf
Authors
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.
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Publication date : Dec 2010
Paper File :
India Conference 2011_LAG_final.pdf
Authors
Luc-André Gregoire, Laurence A. Snider, Jean Bélanger, Girish Nanjundaiah, Abstract
This paper describes today's power system simulation challenge.
Simulator technology has evolved from physical/analogue simulators (HVDC simulators, TNA’s) for electromagnetic transients and protection and control studies, to hybrid TNA/Analogue/Digital simulators with the capability of studying electro-mechanical transient behaviour [1], to fully digital real-time simulators. Today’s global power system infrastructure is rapidly changing towards increasingly distributed generation/distribution
systems, and this transformation mandates expanded use of power electronic devices: HVDC, FACTS and interfacing devices for dc and variable-frequency power sources (photovoltaic, wind generation).
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Publication date : Oct 2010
Paper File :
PES-GM-Tutorial_04 - Real Time Simulation.pdf
Authors
Philippe Venne, Jean-Nicolas Paquin, Jean Bélanger, Abstract
Simulation tools have been widely used for the design and improvement of electrical systems since the midtwentieth century. The evolution of simulation tools has progressed in step with the evolution of computing technologies. In recent years, computing technologies have improved dramatically in performance and become widely available at a steadily decreasing cost. Consequently, simulation tools have also seen dramatic performance gains and steady cost decreases.Researchers and engineers now have access to affordable, high
performance simulation tools that were previously too costprohibitive, except for the largest manufacturers and utilities. This paper introduces the role and advantages of using real-time simulation by answering three undamental questions: what is real-time simulation; why is it needed and where does it best fit.The recent evolution of real-time simulators is summarized. The importance of model validation, mixed use of real-time and
offline modes of simulation and test coverage in complex systems is discussed.
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RT-LAB Professional_enRT-LAB Professionnel_fr
Publication date : Jul 2010
Paper File :
TR10-30202-AR-1 eMEGAsim_vs_PSCAD_circuit_RLC_.pdf
Authors
Jean Bélanger, Amine Yamane, Abstract
Real-time simulation requires the use of fixed step integration methods, capable of achieving accuracy with a time step range larger than 10 μs to 100 μs, to enable the use of standard processors and IO systems. Simulation accuracy increases when the time step value decrease but the processing power and number of processors increase when the time step decreases. The choice of integration techniques is also important. Simulation specialists must therefore select the best integration technique and time step that will yield to acceptable results. This document provides a comparison between simulation results obtained by using a classical 2nd order Tustin integration solver (also known as the Trapezoidal method) and the ARTEMIS 5th Order integration Method). The TUSTIN 2nd order method uses two terms of the Taylor series of the exponential function, while ARTEMIS 5th order uses five terms. Tustin is used by conventional electrical simulation software using the nodal technique such as PSCAD and EMTP while SimPowerSystems and eMEGAsim use ARTEMIS 5th order method in addition to the TUSTIN method.
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