European Project – MIGRATE

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

Aims:

  • 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

Partners:

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

M2DC – Modular Multilevel DC Converter

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

Aims:

  • 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 

Partners:

  • 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)

CE2I – Convertisseur d’Energie Intégré Intelligent

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

Aims:

  • 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
 Figure 4 VSC CINERGIA

Partners:

  • 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)

MTDC Experimental Grid

Identification:  “Multi-Terminal DC grid mock-up for off-shore energy production”

Description: 

  • Main Topic : control of MTDC grids
  • Aims: DC voltage and AC frequency control

The growth of offshore wind farms and their geographical dispersion will perhaps lead to a multi-terminal DC (MTDC) configuration. The control strategies of DC system should consider both DC voltage constraints and frequency support of interconnected AC grids.

In the different stages of development for technological applications, the low scale demonstrator is a very important validation phase after the theoretical simulation analysis and prior to first prototypes or industrial installations. In terms of development of MTDC grids, it could still last for many years before getting the first on-site high voltage demonstrator, mainly due to the huge costs involved in such projects and to their impact on the operation of exiting grids. Therefore, the mock-up developed in TWENTIES demo3 provides an interesting intermediate and flexible step between simulations and on site demonstrator by mixing reduced power DC links and real-time simulation to develop an actual low power MTDC grid. This DC grid can be interconnected to a virtual AC power system.

Single-line diagram of the MTDC mock-up

Sponsor:

  • RTE

Main results: 

  • Validation of dual droop control technique on three terminal configuration
  • Validation of MPC control

Partners:

  • Partner n ° 1 (Pilot): Laboratoire L2EP in Lille / Arts et Métiers ParisTech – Lille – Address : 8, Boulevard Louis XIV – 59000 LILLE (France)
  • Partner n ° 2 : Laboratoire L2EP in Lille / Ecole centrale de Lille – Address:  Cité Scientifique, 59651 Villeneuve-d’Ascq (France)
  • Partner n ° 3 : RTE-France – Address:  CNER / Département Postes, Cœur Défense 100, Esplanade Charles de Gaulle F-92932 Paris La Défense (France)

MMC prototype

Project Name:                                                        Do-MMC

Identification:“Design of Modular Multilevel Converter for DC grid”

Description or Abstract:

  • Aims:
    • Develop a Lab prototype of Modular Multilevel Converter (MMC)
    • The prototype must be as closest as possible to the full scale transmission grid MMC
  • Main characteristics:
    • Vdc= 400V ; Vg= 116V at 50Hz ; Prated= 5kW ; Qrated= 1,5kVAR
    • 20 Sub-modules by arm
MMC schematic
  • Period: from October 2014 to December 2016
  • Sponsors: The Nord Pas de Calais’ Council, the French State, Cinergia (Spanish Power Electronics Company) and RTE (French TSO)
  • Context:HVAC to HVDC Conversion ; Transmission Power System
  • Main results:
    • Develop a control architecture of a MMC with lots of switches (240 switches)
    • Use the real time simulation as an aid in the control of complex converters.
    • Produce experimental results of the MMC advance control method proposed by the team
    • Produce two copy of the prototype in order to propose a point-to-point link