Project

Analyzing control system parameters of HVDC converters to investigate the severity of fault transients on DC cable systems at 320 kV

Publisher

Supervisor

Location

Greater Copenhagen area

Background Information:

Modular Multilevel (MMC) type Voltage Source Converters (VSC) together with DC cable systems have been the preferred choice of HVDC transmission technology. Ever evolving converter topologies have imposed challenges on the performance of HVDC cable systems. Differences in converter control in case of faults, both AC and DC can affect the travelling wave phenomena in the cable system.

Aim of project:

To investigate different types of faults in 320 kV symmetrical monopolar cable-based MMC type VSC HVDC converter system with a focus on investigating the impacts of converter control systems on voltage and current profiles (peak value and time characteristics) during the faults on a AC and DC side.

Software tool: PSCAD™

Learning Objectives:

-          State of the art HVDC converter control system

-          Developing knowledge on international standards and recommendations, such as IEC, CIGRÉ

-          Developing/adapting PSCAD model of symmetrical monopolar cable-based multi-level VSC used in a typical offshore wind farm point-to-point interconnector with detail models of cable and converter control systems.

-          Assess the impact of converter internal & external AC faults and DC cable faults on the transient stresses on the HVDC cable.

-          Identify control parameters/schemes with a potential to affect overvoltage profiles and carry out systematic study of the parameters effects on such overvoltages.

-          Derive recommendation based on the study

Possible Study Visit

The student will be provided with an opportunity to visit the HVDC cables factory of NKT in Karlskrona, Sweden. This enable the student to receive valuable feedback from the cable experts on the cable system development, testing and manufacturing.

Points and duration of thesis: 30-35 ECTS (5-6 months)

The thesis is a collaboration between DTU ELEKTRO and DTU WIND

Supervisors:

-          (Main) Nenad Mijatovic - DTU ELEKTRO

-          (Main) Nicolaos A. Cutululis- DTU WIND

-          Jayachandra Naidu Sakamuri - DTU WIND

-          Tanumay Karmokar - NKT Sweden


In collaboration with

NKT cables group A/S

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Contact

Company / Organization

DTU Elektro

Name

Nenad Mijatovic

Position

Lektor

Mail

nm@elektro.dtu.dk

Supervisor info

MSc in Computer Science and Engineering

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Design & Innovation

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Electrical Engineering

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Engineering, Mechanical Engineering

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Industrial Engineering and Management

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Mathematical Modelling and Computation

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Sustainable Energy

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

MSc in Wind Energy

Supervisor

Nenad Mijatovic

ECTS credits

10 - 35

Type

MSc thesis, Special course

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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