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Events at Department of Energy Technology

PhD defence by Bahram Shakerighadi on Modelling and Control of Large-Signal Stability in Power Electronic-based Power Systems

Time

21.09.2020 kl. 14.00 - 17.00

Description

Bahram Shakerighadi, Department of Energy Technology, will defend the thesis "Modelling and Control of Large-Signal Stability in Power Electronic-based Power Systems"

TITLE

Modelling and Control of Large-Signal Stability in Power Electronic-based Power Systems

PHD DEFENDANT

Bahram Shakerighadi

SUPERVISOR

Professor Frede Blaabjerg

CO-SUPERVISOR

Professor Claus Leth Bak & Esmaeil Ebrahimzadeh

MODERATOR

Associate Professor Yongheng Yang

OPPONENTS

Professor Zhe Chen, Dept. of Energy Technology, Aalborg University (Chairman)
Professor Qing-Chang Zhong, Illinois Institute of Technology, Illinois, USA
Professor Jinjun Liu, Xian Jiaotong University, Xian, China

ABSTRACT

Nowadays, power-electronic-based (PE-based) energy sources, such as wind turbines and photovoltaics (PV), are increasing in capacity in electrical grids. Increasing the penetration of PE-based energy sources in power systems changes the scope of stability, security, reliability, and protection assessment of conventional power systems. In modern power systems with a high penetration of PE-based energy sources, the stability issues may lead to outage in a part of the system or even to a blackout. Therefore, it is important to assess PE-based power systems stability challenges to prevent undesired system outages in the grid.
In this project, it is tried to assess stability issues of modern power systems with the focus on the large-signal stability challenges. The project starts with stability analysis of grid-connected voltage source converters (VSCs), where different methods are used to assess the stability of the grid-connected VSC. An energy function-based method and an inertia-based method are used to analyze the stability of grid-tied VSC. Besides, it is tried to assess the large-signal stability of the phase-locked loop (PLL) as one of the most important control loops in most PE-based units. 
Stability assessment of large-scale power systems with PE-based energy sources is considered as the next step in this project. To do so, 4-machine Kundur and 23-machine Nordic test systems are considered as the small-scale and the large-scale power systems, respectively. The large-signal stability assessment is done to demonstrate stability challenges of modern power systems with a high penetration of PE-based energy sources. Thereafter, the large-signal stability challenges of modern power systems is considered, where inertia-based assessment is used to analyze the transient stability of PE-based    

 

DUE TO TECHNICAL DIFFICULTIES, THE DEFENCE WILL NOT BE STREAMED.
THE DEFENCE CAN BE FOLLOWED ON MS TEAMS - PLEASE TURN OF Your camera AND MUTE YOUR MICROPHONE UPON JOINING THE SESSION.

 

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Host

Department of Energy Technology

Address

Pontoppidanstræde 105, Room 4.127