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SweGRIDS research area CIPOWER Controllable Power Components
SweGRIDS project code CP26
Project type PhD
Status running
Researcher Sanja Duvnjak Zarkovic   (webpage)
University KTH (EME)
Project period 2017-02-01 to 2021-08   
Project supervisor Patrik Hilber   (webpage)
Industrial sponsors Vattenfall, Ellevio


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Project abstract

To study and improve methods for the security of supply of one of society’s most important energy carriers has a very high energy relevance. Efficient and reliable transport of electric energy is a key factor for its role in society.

With higher demands on reliability from both customers and regulators, efficient solutions for reliability improvements are of increasing interest. This should be especially considered in the context of a changing power system, in general the pace of changes and in particular with the potential of more intermittent power generation and storage on local levels.

This project deals with apparatus for improving security of supply of mainly local power systems. The objective is minimizing customer interruption costs and other corresponding measures of reliability performance, using monitoring control devices.

For this project a number of different case studies are relevant, primarily cases representing urban and rural settings in different stages ranging from the planning of new networks to systems with heavy reinvestments needs.

Four interconnected challenges has to be addressed:

1. Reliability design (deals with the problem of configuration of networks for best reliability performance)

2. Device capabilities (the capabilities of devices decide on how they can be used including the important aspect of their precision)

3. Reconnection of customers (schemes for fast reconnection at low risk of cascading failures)

4. Not perfect components (protection devices are NOT flawless, at best, they work at a certain level of efficiency, and this should be taken into account)


Summary of work

2017. Literature review study finalized with the paper ”On the Security of Electricity Supply in Power Distribution Systems”.

2018. Recently finished conference paper “MILP vs. GA: Reliability improvement of radial distribution system through distribution system planning”, that compares two different optimization methods applied to the same distribution system planning problem. Working on the journal paper “Reliability improvement of radial distribution network through combination of network expansion planning and optimal switch placement”. By this time, almost all courses finalized (71/75 ECTS).

2019. Acceptance of the paper “MILP vs. GA: Reliability improvement of radial distribution system through distribution system planning” at PowerTech in Milano. All courses finished (78.5/75 ECTS).

Parental leave July 2019 – March 2020

2020. Licentiate thesis defended in October 2020. Three journal papers are submitted and currently under revision process (all three are mentioned in Licentiate thesis and they deal with different aspects of reliability centered distribution system planning). Supervised master thesis (A. Karlsson, “Guidelines for implementing monitoring and remote control equipment in an urban distribution network”). Currently working on the paper (CIRED conference 2021) that is based on this MSc thesis (follow-up).


Event log

2017. KTH-EES Program of Excellence award

2018. Attendance and oral presentation at IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS), Boise, US (24th – 28th June 2018); work presented "On the Security of Electricity Supply in Power Distribution Systems"

2019. Presentation of paper “MILP vs. GA: Reliability improvement of radial distribution system through distribution system planning” at IEEE PES Conference PowerTech, Milano, Italy (23rd – 27th June 2019)

2020. Defense of Licentiate thesis “Security of electricity supply in power distribution system – Optimization algorithms for reliability centered distribution system planning” (20th October 2020)


Project reference-group

Erik Lejerskog,  Ellevio
Susanne Stjernfeldt,  Energiforsk
Fredrik Carlsson,  Vattenfall
Anna Lilly Brodersson,  Vattenfall
Robert Saers,  ABB CRC
Nilanga Abeywickrama,  ABB CRC
Malin Wihlén,  Ellevio
Claes Ahlrot,  E.ON
Tommie Lindquist,  Svenska kraftnät
Milan Radosavljevic,  Svenska kraftnät
Matz Tapper,  Svensk Energi
Lars Enarsson,  Ellevio
Tor Laneryd,  ABB CRC
Åsa Elmqvist,  Vindforsk/Energiforsk
Ola Ivarsson,  E.ON
Ying He,  Vattenfall
Kitimbo Andrew,  Vattenfall
Erik Jenelius,  KTH
Thomas Welte,  Sintef
Johan Öckerman,  Vattenfall Distribution
Ebrahim Shayesteh,  Vattenfall


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.

Integrated reliability centered distribution system planning — Cable routing and switch placement
Sanja Duvnjak Zarkovic,   Ebrahim Shayesteh,   Patrik Hilber.
2021,   Energy Reports, vol. 7

Onshore wind farm - Reliability centered cable routing
Sanja Duvnjak Zarkovic,   Ebrahim Shayesteh,   Patrik Hilber.
2021,   Electric power systems research

Security of Electricity Supply in Power Distribution System : Optimization Algorithms for Reliability Centered Distribution System Planning
Sanja Duvnjak Zarkovic.
2020,   Thesis (Licentiate), KTH Royal Institute of Technology, TRITA-EECS-AVL 2020:47

Impact of the fault location methods on SAIDI of a resonant-earthed distribution system
Md Zakaria Habib,   Md Tanbhir Hoq,   Sanja Duvnjak Zarkovic,   Nathaniel Taylor.
2020,   2020 IEEE International Conference on Power Systems Technology, POWERCON 2020, 14 September 2020 through 16 September 2020

Reliability improvement of distribution system through distribution system planning: MILP vs. GA
Sanja Duvnjak Zarkovic,   Stefan Stankovic,   Ebrahim Shayesteh,   Patrik Hilber.
2019,   2019 IEEE Milan PowerTech

On the Security of Electricity Supply in Power Distribution Systems
Sanja Duvnjak Zarkovic,   Patrik Hilber,   Ebrahim Shayesteh.
2018,   2018 International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2018

Publication list last updated from DiVA on 2021-09-18 22:00.


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Page started: 2017-02-01
Last generated: 2021-09-18