Analysis of subsynchronous oscillations in wind power plants swegrids-logo

SweGRIDS research area Flexible Power Systems
SweGRIDS project code FPS2
Project type PhD
Status completed
Researcher Muhammad Taha Ali   (webpage)
University KTH (EPE)
Project period 2015-01-01 to 2020-05-14    project migrated from earlier Energiforsk funding
Project supervisor Mehrdad Ghandhari   (webpage)
Industrial sponsors Svenska kraftnät, Vattenfall
InnoEnergy PhD School yes  


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Project abstract

Wind energy, being one of the vital sources of energy among the renewable energy sources, brings with itself an appreciable number of benefits for power systems in terms of economical, feasible, and environmental concerns which have magnificently attracted investors, researchers, and engineers. Along with the benefits, there come some challenges which accompany the integration of wind power in the electric power system. One of the main challenges which the integration of wind power has come across recently is of undamped power oscillations. Since late 2009, a new type of oscillation is being researched upon and it has gotten the attention of researchers. This type of oscillation comes into existence when a doubly-fed induction generator (DFIG) wind turbine is connected radially to a series compensated transmission line. During such radial connection, the control circuitry of converters of DFIG interacts with the series compensation capacitor. This interaction is known as sub-synchronous control interaction (SSCI) which in return triggers the condition for voltage and current oscillations and these oscillations keep on growing rapidly. Being a recent challenge, there is a significant need for this interaction to be examined. This project deals with the study and investigation of SSCI. The objective of this project is to analyze and understand the reasons and causes which inflict such oscillations and to design a control technique which can mitigate the oscillations. This project is divided in to two parts. In first part the main focus is to analyze the phenomenon of SSCI and to pinpoint the control parameters of power electronic converters which play an essential role in triggering the interaction. The second part deals which the design and implementation of control technique, without using any additional power electronic device, which can make the power system immune to SSCI and which can make the system more robust.


Summary of work

2018. The phenomenon of SSCI has been studied and it has been found that the proportional control parameters of voltage-source converters play main role the infliction of SSCI. It has also been shown through simulation that the DFIG-based system can be made immune to SSCI without any additional FACTS device, and by adding the supplementary control in the converter. During the research visit in Aalborg University, Denmark, it has been shown experimentally that SSCI can be avoided by carefully choosing the proper values of sensitive control parameters.


Event log

2018. 6 month research visit to Aalborg University, Denmark, from April to September.


Project reference-group

Mehrdad Ghandhari,  KTH
Per-Olof,  Svenska kraftnät
Jonas Persson,  Vattenfall
Lennart Harnefors,  ABB
Bertil Berggren,  ABB


MSc etc theses connected to the project

2016. Line Loss Prediction Model Design at Svenska kraftnät, Jakob Sahlin.

2017. Modeling of Hybrid STATCOM in PSSE, Abdulaziz Zaher Abdulaz Mikwar.


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.

Analysis of Sub-Synchronous Oscillations in Wind Power Plants
Muhammad Taha Ali.
2020,   Thesis (PhD), KTH Royal Institute of Technology, TRITA-EECS-AVL 2020:19

Analysis and Mitigation of SSCI in DFIG Systems With Experimental Validation
Muhammad Taha Ali,   Dao Zhou,   Yipeng Song,   Mehrdad Ghandari,   Lennart Harnefors,   Frede Blaabjerg.
2020,   IEEE transactions on energy conversion, vol. 35(2)

Optimal tuning and placement of POD for SSCI mitigation in DFIG-based power system
Muhammad Taha Ali,   Mehrdad Ghandhari,   Lennart Harnefors.
2019,   2019 IEEE Milan PowerTech, PowerTech 2019

Transmission Line Loss Prediction Based on Linear Regression and Exchange Flow Modelling
Jakob Sahlin,   Robert Eriksson,   Muhammad Taha Ali,   Mehrdad Ghandari.
2017,   2017 IEEE Manchester PowerTech, Powertech 2017, Manchester, United Kingdom, 18 June 2017 through 22 June 2017

Mitigation of Sub-Synchronous Control Interaction in DFIGs using a Power Oscillation Damper
Muhammad Taha Ali,   Mehrdad Ghandari,   Lennart Harnefors.
2017,   2017 IEEE Manchester PowerTech, Powertech 2017, Manchester, United Kingdom, 18-22 June 2017

Effect of control parameters on infliction of sub-synchronous control interaction in DFIGs
Muhammad Taha Ali,   Mehrdad Ghandhari,   Lennart Harnefors.
2016,   2016 IEEE International Conference on Power and Renewable Energy, ICPRE 2016, Shanghai, China, 21 October 2016 through 23 October 2016

Design of High Efficiency Wireless Power Transmission System at Low Resonant Frequency
Muhammad Taha Ali,   Ali Anwar,   Umais Tayyab,   Yasir Iqbal,   Tauseef Tauqeer,   Usman Nasir.
2014,   16th International Power Electronics and Motion Control Conference and Exposition Antalya, Turkey 21-24 Sept 2014

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


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Page started: 2018-01-01
Last generated: 2021-09-18