Summer School

Power electronic converters on transmission system from fundamental considerations to practical applications

L2EP : Laboratoire d'Electrotechnique et Electronique de Puissance - CE2I

11 – 13 July 2022


The number of power electronic converters is increasing quickly in all the different parts of the grid. The electrical power system is moving from the “electromechanical world” to the “power electronic world”. The aim of this course is to contribute to build a bridge between the two worlds by using simplified models of power electronic converters and by integrating the key parameters and needs of the power system in the control design of the converters. The control algorithms will be built step by step starting from fundamental considerations about physics and introducing progressively the different functionalities required for a converter connected to the grid. The classical grid following control will be addressed and its limitation highlighted but the focus will mainly be done on the grid forming control. From these fundamental analyses, some practical applications will be derived such as wind turbine control, storage or HVDC systems. The participants will progressively build their own control by using predefined models of converters.

Target Audience

The target audience is Phd students working in power electronic applied to power system and people from the industry working in the same topic.

The models of power electronic converters will be simple enough to be understood by any person with some basic knowledge about electrical engineering and control.

Teaching method

The program of the course is a mix between some theoretical contents closely connected with some practical simulations on Matlab/Simulink and Simpower system. All the simulation files can be loaded on its personal computer or run online by using Matlab Online (in this case, computers will be available). These simulation models will be freely available and may be used freely for other applications. Several speakers from industry will also propose some conferences in order to bring their practical experience. All the different model parameters will be using some realistic parameters drawn from practical data. 

Provisional schedule

Monday 11  July 2022

13:00 – 14:00 CET 14:00 – 18:00 CETRegistration  Fundamental considerations on the new power systems needs and power electronic converters models and control 

Tuesday 12  July 2022

9:00 -12:00 CETCharacterization and test of the different types of controls for Voltage Source Converter connected to simple grids 
12:00 – 13:00 CET 13:30 – 17:30 CET Lunch Break Application to MMC, wind turbine and storage 

Wednesday 13  July 2022

9:00 -12:00 CETStudy of interaction between converters in various grids 

In all the difference parts of the course, some industrial conferences will be given on dedicated topics. 

Practical information

All the courses will be presented in English.

The summer school takes place in Centrale Lille – Cite Scientifique 59650 Villeneuve d’Ascq – France

It is also possible to attend the summer school remotely by Teams.  A link will be provided 

Registration will be open in May 2022

 Physical eventVirtual event
Students150 €75 €
Academics250 €125 €
Industrial350175 €


Organization team


Xavier Guillaud  – professor in Centrale Lille . He received his Ph.D from University of Lille in 1992 and joined the Laboratory of Electrical Engineering and Power Electronic (L2EP) in 1993.  He has been professor in Ecole Centrale of Lille since 2002. First, he worked on modeling and control of power electronic systems. Then, he studied the integration of distributed generation and especially renewable energy in the power system. Nowadays, he is focused on the integration of high voltage power electronic converters in the transmission system. He is involved on several projects about power electronic on the grid within European projects and a large number of projects with French electrical utilities.

Frederic Colas – Research engineer – Arts et Metiers. He received a PhD in control system in 2007 from Ecole Centrale de Lille (France). Frédéric Colas is a member of the Laboratory of Electrical Engineering (L2EP) in Lille and is a Research Engineer at Arts et Métiers. His field of interest includes the integration of dispersed generation systems in electrical grids, advanced control techniques for power system, integration of power electronic converters in power systems and hardware-in-the-loop simulation.

Antoine Bruyere – Professor Assistant, Centrale Lille Institute. He received the Ph.D. degree from Arts et Métiers in Electrical Engineering in 2009. He spent 10 years in Automotive industry, with Valeo Powertrain Electronics Product Group, as Expert in Automotive electrification. In 2016, he became a Professor Assistant with the Centrale Lille Institute, Laboratory of Electrical Engineering of Lille (L2EP). His actual research focuses on renewable energy integration on power-grid, using Power-Electronics

François Gruson – associate professor in Arts et Métiers Institute of technology, Lille. He received the Ph.D. degree in electrical engineering from the Ecole Centrale de Lille, Lille, in 2010. Since 2011, he has been working as Associate Professor at Institute of technology in the Laboratoire d’Electrotechnique et d’Electronique de Puissance of Lille (L2EP), Lille, France. His research interests include power electronic converter and power quality for distribution and transmission grid applications and especially for HVDC transmission grid.

Mohamed Moez BELHAOUANE – Research Engineer, Centrale Lille Institute. He received a Ph.D. degree in Electrical Engineering from Polytechnic School of Tunisia, in 2011. He is a research engineer at Centrale Lille Institute (France) and a member of the Laboratory of Electrical Engineering and Power Electronics (L2EP). His main research interests concern the modeling and control of AC/DC converters and their integration in large transmission grids. In addition, his research advances include also the design and implementation of advanced control strategies for multi-terminal HVDC grids using real-time simulation and Hardware in the Loop (HIL).

Migrate WP3 workshop

October, 16th -17th, 2019  

Thank you very much for your active participation!

It is time to share all the materials workshop. We hope you were able to get new insights and interesting discussions during the presentations and demonstrations.

All the materials (presentations, Videos and Pictures) are now online, you can have them by directly clicking on the link below:

European Project – MIGRATE

Identification: Work Package 3 – “Massive Integration Of Power Electronic Devices”


  • To propose and develop novel control and management rules for a transmission grid to which 100 % converter-based devices are connected while keeping the costs under control;
  • To check the viability of such new control and management rules within transmission grids to which some synchronous machines are connected;
  • To infer a set of requirement guidelines for converter-based generating units (grid codes), as far as possible set at the connection point and technology-agnostic, which ease the implementation of the above control and management rules.
  • Build a laboratory test bench to test the proposed control

Period: from 01/01/2016 to 12/31/2019

Sponsors: European Union

Context: Smart Transmission System, Power electronic converters

Main results:

  • Development and verification of an innovative control strategy
  • Stability analysis tools development
  • Test control with a real time simulated power system using PHIL simulation

WP3 Demonstrator


  • RTE,
  • L2EP,
  • ETHz,
  • UCD,
  • EirGrid,
  • REE,
  • Terna

M2DC – Modular Multilevel DC Converter

Identification: “Modular Multilevel Converter DC converter for HVDC grid”


  • Develop Control laws for the M2DC Converter
  • Develop a prototype of Modular Multilevel Converter (MMC) based on the previously developed MMC converter
  • The prototype must be as closest as possible to a full scale transmission grid M2DC

M2DC scheme

  • Period: from November 2015 to November 2018
  • Sponsors: Ecole centrale de Lille ; French state ; L2EP
  • Context: HVDC to HVDC Conversion ; Transmission Power System
  • Main results:
    • Develop a control architecture of a M2DC
    • Use the real time simulation as an aid in the control of complex converters.
    • Produce experimental results of the M2DC control method proposed by the team
  Figure 2: the MMC-M2DC  Figure 3: a MMC-M2DC arm      Figure 4: a MMC-M2DC Sub-module 


  • Partner n ° 1 (Pilot): Laboratoire L2EP in Lille / Ecole centrale de Lille – Cité Scientifique, 59651 Villeneuve-d’Ascq
  • Partner n ° 2: Laboratoire L2EP in Lille / Arts et Métiers ParisTech – Lille – 8, Boulevard Louis XIV – 59000 LILLE
  • Partner n ° 3: Laboratoire L2EP in Lille / Univ. Lille – Bâtiment P2 – 59655 VILLENEUVE-D’ASCQ (France)

Islanding Detection Methods

Identification: “Review and Simulation Islanding detection methods – Validation on a dedicated mock-up”


  • Review of islanding detection methods used in converter
  • Comparison of methods through simulation
  • Validation of dynamic behavior with a dedicated test bench

Main characteristics of the test bench:

  • Objective: simulate an islanding situation on an open inverter
  • Test islanding algorithms with different local loads (RLC and Asynchronous machine)

Experimental bench scheme

Period: from 2014 to 2016

Sponsors: EDF

Context: Distributed generation, islanding protection

Main results:

  • Comparisons of different islanding detection methods
  • Experimental validation on a dedicated mock-up


  • EDF 
  • L2EP

Power Quality Assessment of Photovoltaic Micro-Inverters

Identification: “Operation modes and Power Quality assessment of photovoltaic micro-inverters”

Aims :

  • Study the behavior of photovoltaic micro-inverters (power rating from 250W to 500W)
  • These kind of inverter is used to interconnect one or two photovoltaic panels.
  • The objectives of this study is to test micro-inverters from different manufacturers in both the normal and degraded  modes of operation.
  • This work has been focused on the limits of   normal operation and Power Quality studies.

Period: from 2016 to 2017


Context: Micro-inverter is the youngest solar inverter technology. The main argument in favor of the use of micro-inverters is that their connection is easy and allows to have “plug & play” PV modules. Also, the growth of this market is based on the capacity of low skilled workers to realize PV installations. Moreover, the number of micro-inverter manufacturers is rising since the last three years. Thus, it is difficult to compare the product among themselves.

Main results:

  • Develop a PV micro-inverter test bench
  • Results comparison to manufacturer data
    • power measurements at 10%,20%,30%,50% and 100% of the rated Power
    • Efficiency and EU efficiency computations
    • Minimum and maximum AC voltage protection testing
    • Minimum and maximum frequency protection testing
    • Islanded mode operation on a  RLC load
    • To check the micro-inverter behavior during power quality studies in the case of harmonic voltages in the AC grid. Power quality measurements like:


  • Partner n ° 1 (Pilot):   Laboratoire L2EP in Lille / Arts et Métiers ParisTech – Lille, 8 Boulevard Louis XIV – 59000 LILLE (France)
  • Partner n ° 2:  Laboratoire L2EP in Lille / Ecole centrale de Lille,  Cité Scientifique, 59651 Villeneuve-d’Ascq


Identification:             “Power amplifier for ultra-fastAC/AC conversion” 

  • Context:

To insure the security and reliability a complex and wide coverage tests must be carried out during the whole life-cycle of the products in such industries as power production, aviation, electrical vehicles and railways. The power hardware in the loop or HIL simulation is more and more used to reduce testing costs and protect the real hardware from faulty controllers and in faulty condition tests. The electrical power systems such as drives and converters have a very fast dynamic and cannot be emulated using classical HIL equipment. The IRIS and PLUTON projects aims to develop new power hardware in the loop by exploiting new power converter topologies coupled with the Field Programmable Gate Arrays (FPGA) computing capability for drastically decreasing the simulation time steps allowing the real time simulation of the electrical power systems.

  • Aims:
    • Development of ultra-fast AC/AC conversion power amplifier for Powerhardware in the loop applications.
    • Coupling this power amplifier and the IRIS solver. 
  • Lasting:           since February 2017


  • Partner n ° 1:    L2EP, EPMLab

                                          Address: 8, Boulevard Louis XIV – 59000 LILLE (France)

  • Partner n ° 2:     Puissance Plus

                                                        Address : 500 avenue du Danemark – Z.I. Albasud – 82000 MONTAUBAN

Contacts :

  • Manager :    Fréderic COLAS  – L2EP/Arts et Métiers  ParisTech – Phone : 0033. 
  • Support :      Riad KADRI  – L2EP/AMVALOR –  Phone : 0033. 



The Integration of Real time simulation on FPGA components or IRIS project is the joint effort of EPM laboratory and SPHEREA Test and Service company aimed to develop a new real time simulation system for power electronics and electrical machines based on a custom fast computational hardware implemented in Field Programmable Gate Arrays.

The product testing and maintenance is an important part of its life cycle in the industries with high security and quality demands such as aerospace, transportation or energy production. It allows reducing the risks of accidents, prevents financial losses due to systems failures in energy production and to increase safety. The testing can be very costly for big and complex systems such as an airplane or an electrical station but, although necessary, it can be replaced by a real time simulation at the first stage of the controllers and subsystems verification. In some cases, the testing on the real hardware can be even impossible if a response to faulty conditions is to be checked. The hardware in the loop simulation allows carrying out integral tests of the control systems and independent subsystems without connecting to the actual real-world equipment to greatly reduce the costs and damage risks.

The conventional HIL simulation systems doesn’t allow real time simulation of systems with very fats dynamics such as electrical power systems and machines. The IRIS project is centered around solving the dynamics equation of electrical systems and its acceleration with FPGA/System on Chip. Currently it includes the solvers for generic linear electrical systems based and power electronics the augmented nodal method, and synchronous electrical machines based on state space modeling, but additional type of solvers are planned to be developed. For both these methods a lot of computational power is required if fast real time dynamics simulation is to be achieved. Form the other point of view, the real-time simulation requirements impose the constraints on the loopback response latency. 

To respect these constraints the IRIS project uses hardware computation acceleration and input outputs control base on FPGAs – electronic components allowing to build reconfigurable digital logic circuits. Compared to conventional microprocessors they provide much larger flexibility and optimization of computation pipelines and compared to such devices as GPU they allow hard real time determinism insuring that a proper signal will be sent in the proper place and at the correct time which is very important for the communication with tested equipment and controllers. 

The IRIS simulation system has a modular architecture with asynchronous simulation modules designed for the specific electrical system simulation. The simulation modules are controlled and configured from the system on chip with an ARM core which is also used for host PC communication. This allows online configuration and reconfiguration on the fly to treat non-linearities and slow dynamics that can also be simulated on software part. 

The solvers developed in the IRIS project can be used for simulation of electrical power systems for the first stage testing and verification. It can be applied for testing and verification of power production, onboard power grids, electric propulsion and mechatronics in aerospace, automotive, railroad and power production industries. If you are interested in getting more information about the IRIS project or how you can apply it to solve your tasks, feel free to contact us at the contact information given below.


  • L2EP, EPMLab
  • SPHEREA Test and Service
    • 5 Avenue Georges Guynemer CS70086 31772 Colomiers Cedex, France

CE2I – Convertisseur d’Energie Intégré Intelligent

Identification: “Control Strategies of a DC Based Offshore Wind Farm With Series Connected Collection Grid”


  • Propose control strategy for a new topology of off shore wind farms
  • Build a laboratory test bench for testing the control
  • Main characteristics of the test bench:
    • Vdc = 400V ; Vg = 220V at 50Hz ; Prated = 5kW
    • Central coordination of wind turbine emulation
    • Use of DC cable
Experimental Test Bench

Period: from October 2016 to December 2017

Sponsors: The Nord Pas de Calais’ Council, the French State, European Union

Context: HVDC to HVAC Conversion ; Offshore wind farms; HVDC transmission

Main results:

  • Development and verification of an innovative control strategy
  • Use of real time simulation for the power converter control
  • Experimental results of a small scale wind farm
  Figure 2DC Power Supplies Figure 3 Electric cabinet


  • Partner n ° 1 :   Hautes Etudes d’ingénieur –  13 Rue de Toul, 59000 Lille (France)
  • Partner n ° 2:   Arts et Métiers ParisTech – 8, Boulevard Louis XIV – 59000 LILLE (France)