Internship – AC collector based offshore wind farm operation and control

Posted 2 months ago

SuperGrid Institute brings together 180 employees of 28 different nationalities who work together within a dynamic environment in the city of Lyon. As an independent research and innovation centre, we are dedicated to developing technologies for the future power transmission system, the “supergrid”, including HVDC & MVDC technologies.

As a multi-disciplinary research centre with advanced simulation capabilities & multiple test platforms, including numerous associated laboratories, SuperGrid Institute uses its comprehensive expertise to provide a wide range of services and solutions to support our customers in developing power systems, equipment, and components. We specialise in system architecture and work on ensuring network security and stability while allowing for the integration of intermittent renewable energy sources. Find out more by visiting our website: www.supergrid-institute.com.

General Context

The ongoing large-scale integration of renewable energies (RES) in Europe is leading to important changes in the structure and operation of the transmission system. Indeed, transitioning the production from fossil fuels to wind and solar power (generally connected via power electronics) generation leads to dramatic changes in power flows across AC transmission networks that, as a result requires a major upgrading. Wind turbine generators, especially for offshore wind farms, are growing in both size and power rating. They are connected to the power conversion systems to provide requested power and support grids under normal and abnormal operations. Controls of power conversion systems in wind turbines for large wind farms will play an essential role in improving the power system stability with high wind penetration. The Typical AC-DC-AC power converters connecting the wind turbine have their controls based on the grid-following (GFL) techniques, in which the phase-locked loop (PLL) is used to track the instantaneous angle of the point of common coupling (PCC) voltage, and the current control loop is used to regulate the AC current reflecting active and reactive power injected into the grid. In this configuration, the PLL may negatively reduces the power converter stability’s margin, especially when the grid condition is weak. The instability of multi-megawatt wind turbines will result in more severe impacts on the overall power system stability. New emerging Grid-forming (GFM) control techniques can address the instability issues of wind turbines under weak grid conditions.

Objectives / Missions

The objective of this work is to build a reference grid model of a wind farm including several wind turbines with their associated controls. The aim is to build a complete wind farm model. Grid following and grid forming controls will be used considering the grid conditions and requirements.

The planned workflow is as follows:

  • Starting from an existing state of the art of AC collector based offshore wind farm operation and control
  • Understanding standard control algorithms and strategies for fully fed AC collector based offshore wind farm
  • Implementation of standard control algorithms and strategies for a multi-turbines wind farms identified use case ((control of wind turbines – WT and wind power parks – WPP).
  • Integration of new grid requirements and implementation of grid forming control
  • Evaluation of the impact on turbine electrical and mechanical systems of such grid requirements with grid forming controls on the wind turbine behaviors.
  • Report and simulation files deliverables

Candidate Profile

Students in their final year of engineering school or master’s degree. The student must have a good knowledge in electrical and control engineering. The candidate must have good analytical and modelling and simulation skills and be a driving force behind the project. Knowledge on power system simulation tools will be given specific consideration.

What we have to offer:

–              You will be joining an institute for energy transition, a promising and stimulating field of activity,

–              A young, dynamic working environment,

–              Diverse, international teams (+25 nationalities),

–              Contribution to meal expenses (company restaurant)

–              Sports club within the company (on-site yoga, football, running, etc.)

–              Use of self-service company bicycles

Other information

Applications should be sent to the following address: job-zqwewg@mail.flatchr.io 

Start date: September 2022 Ref. Budget: SP1.3
Place of work: Villeurbanne Duration: 6 months

SuperGrid Institute is an equal opportunities employer. We respect and value the diversity of our employees, their backgrounds and their professional experience. We believe in equality and take affirmative action to ensure that discrimination has no place in our re

Job Features

Contract TypeInternship
Duration6 months
Start DateSeptember 2022
Qualification requiredMaster's degree / Engineering school

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