SAM
https://sam.ensam.eu:443
The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.Sun, 26 May 2019 11:04:29 GMT2019-05-26T11:04:29ZGrid Connected Inverter Behavior with an Output LC Filter under Voltage Sag Operation
http://hdl.handle.net/10985/6314
Grid Connected Inverter Behavior with an Output LC Filter under Voltage Sag Operation
SALHA, Fouad; COLAS, Frédéric; GUILLAUD, Xavier
The aim of this paper is to propose an over current limitation and voltage control strategy for a grid connected inverter with a LC output filter used in distributed generation and in case of voltage sag. This strategy relies on the control of LC output filter voltage with a resonant controller. This controller has to control current and load voltage throughout voltage sag. Generally, resonant controller is made up of a proportional and resonance term, which contains two imaginary poles that aimed to obtain an infinite gain at the resonance frequency. State feedback structure and pole assignment approach are used to tune the proposed control strategy. Comparative results for the application of both resonant and classical PI controller in d-q frame are showed in this paper. The last part deals with the implementation of control strategies on a real time simulation environment. The effectiveness of the proposed controller under a voltage sag operation is shown by experimental results.
Thu, 01 Jan 2009 00:00:00 GMThttp://hdl.handle.net/10985/63142009-01-01T00:00:00ZSALHA, FouadCOLAS, FrédéricGUILLAUD, XavierThe aim of this paper is to propose an over current limitation and voltage control strategy for a grid connected inverter with a LC output filter used in distributed generation and in case of voltage sag. This strategy relies on the control of LC output filter voltage with a resonant controller. This controller has to control current and load voltage throughout voltage sag. Generally, resonant controller is made up of a proportional and resonance term, which contains two imaginary poles that aimed to obtain an infinite gain at the resonance frequency. State feedback structure and pole assignment approach are used to tune the proposed control strategy. Comparative results for the application of both resonant and classical PI controller in d-q frame are showed in this paper. The last part deals with the implementation of control strategies on a real time simulation environment. The effectiveness of the proposed controller under a voltage sag operation is shown by experimental results.Energetic Macroscopic Representati on and Inversion Based Control of a Modular Multilevel Converter.
http://hdl.handle.net/10985/10045
Energetic Macroscopic Representati on and Inversion Based Control of a Modular Multilevel Converter.
DELARUE, Philippe; GRUSON, François; GUILLAUD, Xavier
This papers deals with the Modular Multilevel Converter (MMC). This structure is a real breakthrough which allows transmitting huge amount of power in DC link. In the last ten years, lots of papers have been written but most of them study some intuitive control algorithms. This paper proposes a formal analysis of MMC model which leads to the design of a control algorithm thanks to the inversion of the model. The Energetic Macroscopic Representation is used for achieving this goal. All the states variables are controlled to manage the energy of the system, avoid some instable operational points and determine clearly all the dynamics of the different loops of the system.
Wed, 01 Jan 2014 00:00:00 GMThttp://hdl.handle.net/10985/100452014-01-01T00:00:00ZDELARUE, PhilippeGRUSON, FrançoisGUILLAUD, XavierThis papers deals with the Modular Multilevel Converter (MMC). This structure is a real breakthrough which allows transmitting huge amount of power in DC link. In the last ten years, lots of papers have been written but most of them study some intuitive control algorithms. This paper proposes a formal analysis of MMC model which leads to the design of a control algorithm thanks to the inversion of the model. The Energetic Macroscopic Representation is used for achieving this goal. All the states variables are controlled to manage the energy of the system, avoid some instable operational points and determine clearly all the dynamics of the different loops of the system.Synthesis of different types of energy based controller for a Modular Multilevel Converter integrated in a HVDC link
http://hdl.handle.net/10985/10783
Synthesis of different types of energy based controller for a Modular Multilevel Converter integrated in a HVDC link
SAMIMI, Shabab; GRUSON, François; DELARUE, Philippe; GUILLAUD, Xavier
Modular Multilevel Converters are becoming increasingly popular with the development of HVDC connection and, in the future, Multi Terminal DC grid. A lot of publications have been published about this topology these last years since it was first proposed. Few of them are addressing explicitly the 2 different roles that are held by this converter in a HVDC link: controlling the power or controlling the DC voltage level. Moreover, for a given function, different ways of controlling this converter may be considered. This paper proposes an overview of the different solutions for controlling the MMC and proposes a methodology to synthesize the control architecture.
Thu, 01 Jan 2015 00:00:00 GMThttp://hdl.handle.net/10985/107832015-01-01T00:00:00ZSAMIMI, ShababGRUSON, FrançoisDELARUE, PhilippeGUILLAUD, XavierModular Multilevel Converters are becoming increasingly popular with the development of HVDC connection and, in the future, Multi Terminal DC grid. A lot of publications have been published about this topology these last years since it was first proposed. Few of them are addressing explicitly the 2 different roles that are held by this converter in a HVDC link: controlling the power or controlling the DC voltage level. Moreover, for a given function, different ways of controlling this converter may be considered. This paper proposes an overview of the different solutions for controlling the MMC and proposes a methodology to synthesize the control architecture.Laboratory-based test bed of a three terminals DC networks using power hardware in the loop
http://hdl.handle.net/10985/10300
Laboratory-based test bed of a three terminals DC networks using power hardware in the loop
AMAMRA, Sid-Ali; COLAS, Frédéric; GUILLAUD, Xavier; NGUEFEU, Samuel
In this paper a three stations MTDC grid is presented, providing a specific application of our work. The experimental platform is intended to combine electrical power components and communication/control equipment with real-time simulation tools. In this way the platform can test grid elements and evaluate different operation scenarios under various conditions.
Tue, 01 Jan 2013 00:00:00 GMThttp://hdl.handle.net/10985/103002013-01-01T00:00:00ZAMAMRA, Sid-AliCOLAS, FrédéricGUILLAUD, XavierNGUEFEU, SamuelIn this paper a three stations MTDC grid is presented, providing a specific application of our work. The experimental platform is intended to combine electrical power components and communication/control equipment with real-time simulation tools. In this way the platform can test grid elements and evaluate different operation scenarios under various conditions.MMC Stored Energy Participation to the DC Bus Voltage Control in an HVDC Link
http://hdl.handle.net/10985/12895
MMC Stored Energy Participation to the DC Bus Voltage Control in an HVDC Link
SAMIMI, Shabab; GRUSON, François; DELARUE, Philippe; COLAS, Frédéric; BELHAOUANE, Mohamed Moez; GUILLAUD, Xavier
The modular multilevel converter (MMC) is becoming a promising converter technology for HVDC transmission systems. Contrary to the conventional two- or three-level VSC-HVDC links, no capacitors are connected directly on the dc bus in an MMC-HVDC link. Therefore, in such an HVDC link, the dc bus voltage may be much more volatile than in a conventional VSC-HVDC link. In this paper, a connection between the dc bus voltage level and the stored energy inside the MMC is proposed in order to greatly improve the dynamic behavior in case of transients. EMT simulation results illustrate this interesting property on an HVDC link study case.
Fri, 01 Jan 2016 00:00:00 GMThttp://hdl.handle.net/10985/128952016-01-01T00:00:00ZSAMIMI, ShababGRUSON, FrançoisDELARUE, PhilippeCOLAS, FrédéricBELHAOUANE, Mohamed MoezGUILLAUD, XavierThe modular multilevel converter (MMC) is becoming a promising converter technology for HVDC transmission systems. Contrary to the conventional two- or three-level VSC-HVDC links, no capacitors are connected directly on the dc bus in an MMC-HVDC link. Therefore, in such an HVDC link, the dc bus voltage may be much more volatile than in a conventional VSC-HVDC link. In this paper, a connection between the dc bus voltage level and the stored energy inside the MMC is proposed in order to greatly improve the dynamic behavior in case of transients. EMT simulation results illustrate this interesting property on an HVDC link study case.Hardware-in-the-Loop Validation of an FPGA-Based Real-Time Simulator for Power Electronics Applications
http://hdl.handle.net/10985/10274
Hardware-in-the-Loop Validation of an FPGA-Based Real-Time Simulator for Power Electronics Applications
RAZZAGHI, Reza; COLAS, Frédéric; GUILLAUD, Xavier; PAOLONE, Mario; RACHIDI, Fahrad
This paper presents the hardware-in-the-loop (HIL) validation of a proposed FPGA-based real-time simulator for power electronics applications. The proposed FPGA-based real-time simulation platform integrates the Modified Nodal Analysis (MNA) method, Fixed Admittance Matrix Nodal Method (FAMNM) and an optimization technique to assess the optimal value of the switches conductance in order to minimize the relevant errors. Moreover, the proposed platform includes an automatic procedure to translate the netlist user-defined circuit schemes to the relevant equations to be solved in the FPGA. The proposed simulator is validated first by comparing the FPGA- based simulation results with offline ones performed by EMTP- RV. Then, further validation is presented by means of a dedicated HIL experimental setup composed of a controller connected to an actual two-level, three-phase inverter and its corresponding FPGA real-time model.
Thu, 01 Jan 2015 00:00:00 GMThttp://hdl.handle.net/10985/102742015-01-01T00:00:00ZRAZZAGHI, RezaCOLAS, FrédéricGUILLAUD, XavierPAOLONE, MarioRACHIDI, FahradThis paper presents the hardware-in-the-loop (HIL) validation of a proposed FPGA-based real-time simulator for power electronics applications. The proposed FPGA-based real-time simulation platform integrates the Modified Nodal Analysis (MNA) method, Fixed Admittance Matrix Nodal Method (FAMNM) and an optimization technique to assess the optimal value of the switches conductance in order to minimize the relevant errors. Moreover, the proposed platform includes an automatic procedure to translate the netlist user-defined circuit schemes to the relevant equations to be solved in the FPGA. The proposed simulator is validated first by comparing the FPGA- based simulation results with offline ones performed by EMTP- RV. Then, further validation is presented by means of a dedicated HIL experimental setup composed of a controller connected to an actual two-level, three-phase inverter and its corresponding FPGA real-time model.Energy and director switches commutation controls for the alternate arm converter
http://hdl.handle.net/10985/14358
Energy and director switches commutation controls for the alternate arm converter
VERMEERSCH, Pierre; GRUSON, François; GUILLAUD, Xavier; MERLIN, Michael M.C.; EGROT, Philippe
The Alternate Arm Converter (AAC) is promising multilevel Voltage Source Converter (VSC) suitable for High Voltage Direct Current (HVDC) transmission systems. This converter exhibits interesting features such as a DC Fault Ride Through capability thanks to the use of Full-Bridge Sub-Modules (SM) and a smaller footprint than an equivalent Modular Multilevel Converter (MMC). After an analysis of the converter operating modes called Non-overlap and Overlap mode, a sequential representation of the AAC operation is proposed. The main originality of this paper is the use of the Petri Net to describe all the phases and to highlight their sequencing. According to the phases identified thanks to the sequential approach, models and control structures for the grid currents, the internal energy and the Zero Current Switching (ZCS) are detailed. Furthermore, the step-by-step approach proposed in this paper allows a clear and rigorous modelling of this complex converter.
Mon, 01 Jan 2018 00:00:00 GMThttp://hdl.handle.net/10985/143582018-01-01T00:00:00ZVERMEERSCH, PierreGRUSON, FrançoisGUILLAUD, XavierMERLIN, Michael M.C.EGROT, PhilippeThe Alternate Arm Converter (AAC) is promising multilevel Voltage Source Converter (VSC) suitable for High Voltage Direct Current (HVDC) transmission systems. This converter exhibits interesting features such as a DC Fault Ride Through capability thanks to the use of Full-Bridge Sub-Modules (SM) and a smaller footprint than an equivalent Modular Multilevel Converter (MMC). After an analysis of the converter operating modes called Non-overlap and Overlap mode, a sequential representation of the AAC operation is proposed. The main originality of this paper is the use of the Petri Net to describe all the phases and to highlight their sequencing. According to the phases identified thanks to the sequential approach, models and control structures for the grid currents, the internal energy and the Zero Current Switching (ZCS) are detailed. Furthermore, the step-by-step approach proposed in this paper allows a clear and rigorous modelling of this complex converter.Design, implementation and testing of a Modular Multilevel Converter
http://hdl.handle.net/10985/12896
Design, implementation and testing of a Modular Multilevel Converter
GRUSON, François; KADRI, Riad; COLAS, Frédéric; GUILLAUD, Xavier; DELARUE, Philippe; BERGE, Marta; DENNETIERE, Sébastien; OULD BACHIR, Tarek
The Modular Multilevel Converter (MMC) is a power electronic structure used for high voltage adjustable speed drives applications as well as power transmission applications and high-voltage direct current. MMC structure presents many advantages such as modularity, the absence of a high voltage DC bus and very low switching frequency. It presents also some disadvantages such as modeling complexity and control due to the large number of semiconductors to control. The objectives of this paper are to present the methodology to design a laboratory MMC converter and its control system. This methodology is based on an intensive used of real-time simulation, to develop and test the control algorithm is proposed. This MMC prototype must be as realistic as possible to a full scale MMC, with a large number of sub-modules (i.e. 640 kV on the DC side, a rated power of 1 GW and 400 sub-modules). A control hardware integrating distributed processors (one for each arm) and a master control is presented. The protocols to validate sub-modules, arms and the converter are explained.
Sun, 01 Jan 2017 00:00:00 GMThttp://hdl.handle.net/10985/128962017-01-01T00:00:00ZGRUSON, FrançoisKADRI, RiadCOLAS, FrédéricGUILLAUD, XavierDELARUE, PhilippeBERGE, MartaDENNETIERE, SébastienOULD BACHIR, TarekThe Modular Multilevel Converter (MMC) is a power electronic structure used for high voltage adjustable speed drives applications as well as power transmission applications and high-voltage direct current. MMC structure presents many advantages such as modularity, the absence of a high voltage DC bus and very low switching frequency. It presents also some disadvantages such as modeling complexity and control due to the large number of semiconductors to control. The objectives of this paper are to present the methodology to design a laboratory MMC converter and its control system. This methodology is based on an intensive used of real-time simulation, to develop and test the control algorithm is proposed. This MMC prototype must be as realistic as possible to a full scale MMC, with a large number of sub-modules (i.e. 640 kV on the DC side, a rated power of 1 GW and 400 sub-modules). A control hardware integrating distributed processors (one for each arm) and a master control is presented. The protocols to validate sub-modules, arms and the converter are explained.Improving Small-Signal Stability of an MMC With CCSC by Control of the Internally Stored Energy
http://hdl.handle.net/10985/12894
Improving Small-Signal Stability of an MMC With CCSC by Control of the Internally Stored Energy
FREYTES, Julian; BERGNA, Gilbert; JON ARE, SUUL; D'ARCO, Salvatore; GRUSON, François; COLAS, Frédéric; SAAD, Hani; GUILLAUD, Xavier
The DC-side dynamics of Modular Multilevel Converters (MMCs) can be prone to poorly damped oscillations or stability problems when the second harmonic components of the arm currents are mitigated by a Circulating Current Suppression Controller (CCSC). This paper demonstrates that the source of these oscillations is the uncontrolled interaction of the DC-side current and the internally stored energy of the MMC, as resulting from the CCSC. Stable operation and improved performance of the MMC control system can be ensured by introducing closed loop control of the energy and the DC-side current. The presented analysis relies on a detailed state-space model of the MMC which is formulated to obtain constant variables in steady state. The resulting state-space equations can be linearized to achieve a Linear Time Invariant (LTI) model, allowing for eigenvalue analysis of the small-signal dynamics of the MMC. Participation factor analysis is utilized to identify the source of the poorly damped DC-side oscillations, and indicates the suitability of introducing control of the internal capacitor voltage or the corresponding stored energy. An MMC connected to a DC power source with an equivalent capacitance, and operated with DC voltage droop in the active power flow control, is used as an example for the presented analysis. The developed small-signal models and the improvement in small-signal dynamics achieved by introducing control of the internally stored energy are verified by time-domain simulations in comparison to an EMT simulation model of an MMC with 400 sub-modules per arm.
Mon, 01 Jan 2018 00:00:00 GMThttp://hdl.handle.net/10985/128942018-01-01T00:00:00ZFREYTES, JulianBERGNA, GilbertJON ARE, SUULD'ARCO, SalvatoreGRUSON, FrançoisCOLAS, FrédéricSAAD, HaniGUILLAUD, XavierThe DC-side dynamics of Modular Multilevel Converters (MMCs) can be prone to poorly damped oscillations or stability problems when the second harmonic components of the arm currents are mitigated by a Circulating Current Suppression Controller (CCSC). This paper demonstrates that the source of these oscillations is the uncontrolled interaction of the DC-side current and the internally stored energy of the MMC, as resulting from the CCSC. Stable operation and improved performance of the MMC control system can be ensured by introducing closed loop control of the energy and the DC-side current. The presented analysis relies on a detailed state-space model of the MMC which is formulated to obtain constant variables in steady state. The resulting state-space equations can be linearized to achieve a Linear Time Invariant (LTI) model, allowing for eigenvalue analysis of the small-signal dynamics of the MMC. Participation factor analysis is utilized to identify the source of the poorly damped DC-side oscillations, and indicates the suitability of introducing control of the internal capacitor voltage or the corresponding stored energy. An MMC connected to a DC power source with an equivalent capacitance, and operated with DC voltage droop in the active power flow control, is used as an example for the presented analysis. The developed small-signal models and the improvement in small-signal dynamics achieved by introducing control of the internally stored energy are verified by time-domain simulations in comparison to an EMT simulation model of an MMC with 400 sub-modules per arm.Distributed Economic Dispatch of Embedded Generation in Smart Grids
http://hdl.handle.net/10985/11353
Distributed Economic Dispatch of Embedded Generation in Smart Grids
DIBANGOYE, Jille; GUILLAUD, Xavier; COLAS, Frédéric; FAKHAM, Hicham; DONIEC, Arnaud
In a Smart Grid context, the increasing penetration of embedded generation units leads to a greater complexity in the management of production units. In this arti- cle, we focus on the impact of the introduction of decentralized generation for the unit commitment problem (UC). Unit Commitment Problems consist in finding the optimal schedules and amounts of power to be generated by a set of gen- erating units in response to an electricity demand forecast. While this problem have received a significant amount of attention, classical approaches assume these problems are centralized and deterministic. However, these two assumptions are not realistic in a smart grid context. Indeed, finding the optimal schedules and amounts of power to be generated by multiple distributed generator units is not trivial since it requires to deal with distributed computation, privacy, stochastic planning, ... In this paper, we focus on smart grid scenarios where the main source of complexity comes from the proliferation of distributed generating units. In solving this issue, we consider distributed stochastic unit commitment prob- lems. We introduce a novel distributed gradient descent algorithm which allow us to circumvent classical assumptions. This algorithm is evaluated through a set of experiments on real-time power grid simulator.
Thu, 01 Jan 2015 00:00:00 GMThttp://hdl.handle.net/10985/113532015-01-01T00:00:00ZDIBANGOYE, JilleGUILLAUD, XavierCOLAS, FrédéricFAKHAM, HichamDONIEC, ArnaudIn a Smart Grid context, the increasing penetration of embedded generation units leads to a greater complexity in the management of production units. In this arti- cle, we focus on the impact of the introduction of decentralized generation for the unit commitment problem (UC). Unit Commitment Problems consist in finding the optimal schedules and amounts of power to be generated by a set of gen- erating units in response to an electricity demand forecast. While this problem have received a significant amount of attention, classical approaches assume these problems are centralized and deterministic. However, these two assumptions are not realistic in a smart grid context. Indeed, finding the optimal schedules and amounts of power to be generated by multiple distributed generator units is not trivial since it requires to deal with distributed computation, privacy, stochastic planning, ... In this paper, we focus on smart grid scenarios where the main source of complexity comes from the proliferation of distributed generating units. In solving this issue, we consider distributed stochastic unit commitment prob- lems. We introduce a novel distributed gradient descent algorithm which allow us to circumvent classical assumptions. This algorithm is evaluated through a set of experiments on real-time power grid simulator.