Improved functionality for hydropower storage stations swegrids-logo

SweGRIDS research area STORAGE
SweGRIDS project code ST3
Project type PhD
Status completed
Researcher Jose Perez-Loya   (webpage)
University UU
Project period 2011-12-01 to 2017-10-06   
Project supervisor Urban Lundin   (webpage)
Industrial sponsors Vattenfall
InnoEnergy PhD School yes  


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Project abstract

The project concerns magnetic thrust bearings for hydropower applications. By having a magnetic thrust bearing, better control can be achieved since the stiffness and damping of the shaft can be actively controlled. The project involves electromagnetic and controller design.


Summary of work

A permanent magnet thrust bearing for a synchronous generator test rig at Uppsala University has been designed, constructed, installed and tested. Further, an electromagnetic thrust bearing for the 10 MW hydropower generator Porjus U9 has been designed, constructed, and tested.

By using magnetic thrust bearings designed for dynamic loads and paired with modern power electronics and controllers in combination with mechanical thrust bearings, satisfactory dynamic performance can be achieved even for units with Kaplan turbines, resulting in more efficient and robust thrust bearing system.

A new method to magnetically balance synchronous machines has emerged. The concept is now patented and has been verified in a small scale device. A pilot installation is about to happen in 2018. Further higher torque control (including during startup) has been achieved with the help of current controlled field winding setup.


Event log

2015. First place in the category "Environment and Energy" of Venture Cup, region East: link [pdf].

2016. Top 25 Nordic clean tech open.

2016. SweGRIDS best poster award.

2016. Magnetic bearing pilot installation started

2017. Final testing and commissioning of the magnetic bearing


Project reference-group

Thommy Karlsson,  Norconsult
Anders Holm,  Vattenfall Research and Development
Mattias Nässelqvist,  Vattenfall Vattenkraft
Christian Andersson,  ELFORSK
Mats Wahlen,  Fortum
Peter Altzar,  Fortum
Per-Olof Andersson,  Vattenfall Vattenkraft
Henrik Lindsjö,  Andritz Hydro


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.

Mitigation of Unbalanced Magnetic Pull in Synchronous Machines With Rotating Exciters
Fredrik Evestedt,   Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2021,   IEEE transactions on energy conversion, vol. 36(2)

Controlling airgap magnetic flux density harmonics in synchronous machines using field current injection
Fredrik Evestedt,   Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2021,   Electrical engineering (Berlin. Print), vol. 103

Start of a synchronous motor using rotor field polarity inversion and rotor back-emf sensing
Urban Lundin,   Fredrik Evestedt,   Johan Abrahamsson,   José Pérez,   Martin Fregelius,   Jonas Kristiansen Nøland.
2020,   International Conference on Electrical Machines, ICEM 2020, Online, Aug 23-26, 2020

Comparison of Thyristor Rectifier Configurations for a Six-Phase Rotating Brushless Outer Pole PM Exciter
Jonas Kristiansen Nøland,   Fredrik Evestedt,   Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2018,   IEEE transactions on industrial electronics (1982. Print), vol. 65(2)

Testing of Active Rectification Topologies on a Six-Phase Rotating Brushless Outer Pole PM Exciter
Jonas Kristiansen Nøland,   Fredrik Evestedt,   Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2018,   IEEE transactions on energy conversion, vol. 33(1)

Demonstration of Synchronous Motor Start by Rotor Polarity Inversion
J. José Pérez-Loya,   C. Johan D. Abrahamsson,   Fredrik Evestedt,   Urban Lundin.
2018,   IEEE transactions on industrial electronics (1982. Print), vol. 65(10)

Damper Winding Fault Analysis in Synchronous Machines
Subrat Sahoo,   Fredrik Holmgren,   Pedro Rodriguez,   José Pérez,   Urban Lundin.
2018,   13th International Conference on Electrical Machines (ICEM), Alexandroupoli, Greece, Sep 03-06, 2018

Magnetic thrust bearing for a 10 MW hydropower generator with a Kaplan turbine
Curt Johan David Abrahamsson,   Jesús José Pérez-Loya,   Martin Fregelius,   Fredrik Evestedt,   Johan Bladh,   Urban Lundin.
2018,   Hydro 2018, Oct 15 - Oct 17, Gdansk, Poland 2018

Electromagnetic losses in synchronous machines during active compensation of unbalanced magnetic pull
Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2018,   IEEE transactions on industrial electronics (1982. Print), vol. 66(1)

Demonstration of active compensation of unbalanced magnetic pull in synchronous machines
J. Jose Pérez-Loya,   C. Johan. D. Abrahamsson,   Urban Lundin.
2017,   CIGRE Science & Engineering, vol. 8

Synchronous machine and method for operating a synchronous machine
J. Jose Pérez-Loya,   C. Johan. D. Abrahamsson,   Urban Lundin.

Analysis and control of magnetic forces in synchronous machines
J. J. Pérez-Loya.
2017,   Thesis (PhD), Acta Universitatis Upsaliensis, Digital 1542

Eddy Currents in a Passive Magnetic Axial Thrust Bearing for a Flywheel Energy Storage System
Magnus Hedlund,   Johan Abrahamsson,   Jesús José Pérez-Loya,   Johan Lundin,   Hans Bernhoff.
2017,   International journal of applied electromagnetics and mechanics, vol. 54(3)

Magnetic thrust bearing for a hydropower unit with a Kaplan turbine
J. Jose Pérez-Loya,   Fredrik Evestedt,   Urban Lundin.

Performance tests of a permanent magnet thrust bearing for a hydropower synchronous generator test-rig
Jesús José Pérez-Loya,   Johan Abrahamsson,   Fredrik Evestedt,   Urban Lundin.
2017,   ACES Journal, vol. 32(8)

Design and Characterization of a Rotating Brushless Outer Pole PM Exciter for a Synchronous Generator
Jonas Kristiansen Nøland,   Fredrik Evestedt,   J. José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2017,   IEEE transactions on industry applications, vol. 53(3)

Arrangement and method for force compensation in electrical machines
J. J. Pérez-Loya,   C. J. D. Abrahamsson,   U. Lundin.

Fail-safe system for discharging a magnetic thrust bearing
J. J. Pérez-Loya,   C. J. D. Abrahamsson,   U. Lundin.

Arrangement for supporting a rotatable body
J. J. Pérez-Loya,   C. J. D. Abrahamsson,   U. Lundin.

Design and characterization of a rotating brushless PM exciter for a synchronous generator test setup
Jonas Kristiansen Nøland,   Fredrik Evestedt,   Jesus José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2016,   International Conference on Electrical Machines 2016 (ICEM'16), Lausanne, SWITZERLAND, SEP 04-07, 2016

Initial Performance Tests of a Permanent Magnet Thrust Bearing for a Hydropower Synchronous Generator Test-Rig
J. Jose Perez-Loya,   Johan Abrahamsson,   Fredrik Evestedt,   Urban Lundin.
2016,   AIM 2016

Simple Method to Calculate the Force between Thin Walled Solenoids
J. José Pérez-Loya,   Urban Lundin.
2016,   Progress In Electromagnetics Research M, vol. 51

Evaluation of different power electronic interfaces for control of a rotating brushless PM exciter
Jonas Kristiansen Nøland,   Fredrik Evestedt,   Jesús José Pérez-Loya,   Johan Abrahamsson,   Urban Lundin.
2016,   42nd annual conference of the IEEE Industrial Electronics Society, Florence, October 27-27, 2016

Analysis of passive magnetic bearings for kinetic energy storage systems
Elkin Rodriguez,   Juan de Santiago,   Jesus José Pérez-Loya,   Felipe S Costa,   Guilherme G Sotelo,   Janaina Goncalves de Oliveira,   Richard M Stephan.
2014,   14th International Symposium on Magnetic Bearings

Passive Magnetic Bearing System
Elkin Rodriguez,   Jesus José Pérez-Loya,   Juan de Santiago,   Felipe S Costa,   Guilherme G Sotelo,   Janaina Goncalves de Oliveira,   R. M. Stephan.
2014,   22nd International Conference on Magnetically Levitaded Systems and Linear Drives

Optimization of Force Between Cylindrical Permanent Magnets
J. Jose Perez-Loya,   Urban Lundin.
2014,   IEEE Magnetics Letters, vol. 5

Magnetic Modeling and Measurement of Forces Between Permanent Magnet Rings used as Passive Magnetic Bearings
Jesus José Pérez-Loya,   E. Rodriguez,   Magnus Hedlund,   R. M. Stephan,   Urban Lundin.
2013,   1st Brazilian Workshop on Magnetic Bearings, BWMB 2013

Construction of a Permanent Magnet Thrust Bearing for a Hydropower Generator Test Setup
Jesus José Pérez-Loya,   Juan de Santiago,   Urban Lundin.
2013,   1st Brazilian Workshop on Magnetic Bearings, BWMB 2013

Passive Axial Thrust Bearing for a Flywheel Energy Storage System
Magnus Hedlund,   Johan Abrahamsson,   Jesús José Pérez-Loya,   Johan Lundin,   Hans Bernhoff.
2013,   The 1st Brazilian Workshop on Magnetic Bearings

Publication list last updated from DiVA on 2021-09-18 22:02.


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Page started: 2011-12-01
Last generated: 2021-09-18