Development of multilevel power converter system with smart field-programmable control suitable for wave energy conversion swegrids-logo

SweGRIDS research area CIPOWER Controllable Power Components
SweGRIDS project code CP9
Project type PhD
Status completed
Researcher Deepak Elamalayil Soman   (webpage)
University UU
Project period 2011-12-01 to 2017-02-28   
Project supervisor Mats Leijon   (webpage)
Industrial sponsors Seabased
InnoEnergy PhD School yes  


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Project abstract

The prime objective of the work is to develop a suitable multilevel converter system with field programmable control scheme for renewable energy conversion and smart grid integration. Lysekil Wave Power Project is used as a reference test case of challenging renewable energy conversion and grid connection. Compared to the conventional two level inverter systems, the multilevel converter systems can provide better power quality, high voltage output, better power flow control and improved efficiency. The field programmable control system can generate ultrafast concurrent control signals to satisfy the highly demanding multilevel control requirements. The FPGA based system can also incorporate basic communication parts, which helps the system to synchronize with other modules of the power system. The work also focuses on effectively eliminating the shortcomings of conventional multilevel inverter system such as capacitor voltage imbalance, by utilizing the intelligent control scheme developed. All the technologies developed during the project can be utilised for power absorption, conditioning and grid integration of wave energy farms in the future.


Summary of work

2015 and before. Pulse delay Control Method (IL ripple averaging method) for Capacitor Voltage Balancing for TLB NPC.

2015 and before. Contour Based Dead-Time Harmonic Analysis method

2016. AC2AC Direct Conversion M2C topology based on 72 MMC cells prototype has been developed during the mobility to Siemens AG, Corporate Technology. The main application areas are Smart Grids, SSTs and Traction. 73 FPGAs based Master Slave real time distributed embedded controller back bone is also developed using OFC communication techniques.

2016. Various Grid integration strategies for WECs are simulated and analysed. DC link stress analysis is done for WEC interconnection systems.


Event log

2016. Industrial Research Mobility is to Siemens AG, Corporate Technology, Power Electronics Group from March to August 2016 (6 Months).

2016. Premium Award for Best Paper in IET Power Electronics Journal. This was received for a paper entitled "Pulse delay control for capacitor voltage balancing in a three-level boost neutral point clamped inverter" that was published in 2015. The award is given just once per year for this journal, for the best research work published there in the last 2 years. See more on the IET-PEL website.


Project reference-group

Remya Krishna,  Bombardier Transportation Sweden AB
Jelena Loncarski,  Uppsala University


Publications by this researcher

See alternatively the researcher's full DiVA list of publications, with options for sorting.
Publications in journals and conferences usually will not show until a while after they are published.

Interconnection Strategies of Point Absorber Type Wave Energy Converters and Rectifier Units
Jelena Loncarski,   Deepak Elamalayil Soman,   Emanuele Frontoni.
2018,   18th IEEE International Conference on Harmonics and Quality of Power (ICHQP), MAY 13-16, 2018, Ljubljana, SLOVENIA

Multilevel Power Converters with Smart Control for Wave Energy Conversion
Deepak Elamalayil Soman.
2017,   Thesis (PhD), Acta Universitatis Upsaliensis, Digital 1597

Cross-Regulation Assessment of DIDO Buck-Boost Converter for Renewable Energy Application
Deepak Elamalayil Soman,   Mats Leijon.
2017,   Energies, vol. 10(7)

DC-Link Stress Analysis for the Grid Connection of Point Absorber Type Wave Energy Converters
Deepak Elamalayil Soman,   Jelena Loncarski,   Milan Srndovic,   Mats Leijon.
2015,   5th International Conference on Clean Electrical Power (ICCEP)

Contour-Based Dead-Time Harmonic Analysis in a Three-Level Neutral-Point-Clamped Inverter
Irina Dolguntseva,   Remya Krishna,   Deepak Elamalayil Soman,   Mats Leijon.
2015,   IEEE transactions on industrial electronics (1982. Print), vol. 62(1)

Pulse delay Control for Capacitor VoltageBalancing in a Three Level Boost Neutral PointClamped Inverter
Remya Krishna,   Deepak Elamalayil Soman,   Sasi K Kottayil,   Mats Leijon.
2015,   IET Power Electronics, vol. 8(2)

Development of Power Electronics Based Test Platform for Characterization and Testing of Magnetocaloric Materials
Deepak Elamalayil Soman,   Jelena Loncarski,   Lisa Gerdin,   Petter Eklund,   Sandra Eriksson,   Mats Leijon.
2015,   Advances in Electrical Engineering, vol. 2015(670624)

Analysis of Three-level Buck-Boost Converter Operation for Improved Renewable Energy Conversion and Smart Grid Integration
Deepak Elamalayil Soman,   Kasthuri Vikram,   Remya Krishna,   Markus Gabrysch,   Sasi K. Kottayil,   Mats Leijon.
2014,   IEEE International Energy Conference (ENERGYCON), MAY 13-16, 2014, Dubrovnik, CROATIA

Discontinuous conduction mode of a three-level boost DC-DC converter and its merits and limits for voltage cross regulation applications
Deepak Elamalayil Soman,   Remya Krishna,   Mats Leijon,   Kasthuri Vikram,   Sasi K. Kottayil,   Lais A. Vitoi,   Janaina Goncalves de Oliveira,   Sanjay Santhosh Kumar.
2014,   Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE

Synchronous Current Compensator for a Self Balanced Three-Level Neutral Point Clamped Inverter
Remya Krishna,   Deepak Elamalayil Soman,   Sasi K Kottayil,   Mats Leijon.
2014,   Advances in Power Electronics

Control and Implementation of Three Level BoostConverter for Load Voltage Regulation
Lais A Vitoi,   Remya Krishna,   Deepak Elamalayil Soman,   Sasi K Kottayil,   Mats Leijon.
2013,   39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013

Status Update of the Wave Energy Research at Uppsala University
Yue Hong,   Erik Hultman,   Valeria Castellucci,   Boel Ekergård,   Linnea Sjökvist,   Deepak Elamalayil Soman,   Remya Krishna,   Kalle Haikonen,   Antoine Baudoin,   Liselotte Lindblad,   Erik Lejerskog,   Daniel Käller,   Magnus Rahm,   Erland Strömstedt,   Cecilia Boström,   Rafael Waters,   Mats Leijon.
2013,   10th European Wave and Tidal Conference (EWTEC)

A novel multilevel inverter topology based on multi-winding multi-tapped transformers for improved wave shape requirements
Deepak Elamalayil Soman.
2011,   Power Electronics (IICPE), 2010 India International Conference on

Space vector modulation method to balance the neutral point voltage for a three-level inverter
Remya Krishna,   Deepak Elamalayil Soman,   Sasi K Kottayil,   Mats Leijon.
2010,   Joint International Conference on Power Electronics, Drives and Energy Systems (PEDES) & 2010 Power India, 2010

Publication list last updated from DiVA on 2021-09-18 21:59.


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Last generated: 2021-09-18