Sjur Føyen

Sjur Føyen
Norwegian University of Science and Technology | NTNU · Department of Electrical Power Engineering

Master of Technology

About

13
Publications
6,657
Reads
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90
Citations
Education
August 2018 - August 2022
Norwegian University of Science and Technology
Field of study
  • Smart Grids and Signal Processing
August 2013 - June 2018
Norwegian University of Science and Technology
Field of study
  • Energy and Environmental Engineering

Publications

Publications (13)
Conference Paper
Full-text available
With the increasing penetration of voltage-source-converter (VSC) -interfaced distributed generations(DGs) in power systems, oscillation issues have been widelyconcerned whereas the root cause and nature of the oscilla-tion is sometimes not clear in real cases. This paper focuseson the instability mode recognition (IMR) based on a com-plete data-dr...
Article
Second-order Generalized Integrator (SOGI)-based quadrature-signal-generator (QSG), in conjunction with either a phase-locked-loop (PLL) or a frequency-locked-loop (FLL), is widely used as the synchronization unit of grid-tied converters. This paper will reveal and discuss the stability impacts of the frequency-feedback-path (FFP) used in connectin...
Conference Paper
Full-text available
A Hilbert filter design is proposed with the intent of assembling a simple, yet frequency adaptive single-phase grid synchronisation unit. The simplicity lies not with the filter itself, but with the linearity of the orthogonal system generator (OSG) and its absence of frequency feedbacks. This is a trait shared with many standard, frequency fixed...
Article
Full-text available
This paper presents a harmonic domain single-input single-output (SISO) equivalent modeling technique for the impedance modeling and stability analysis of a single-phase grid-connected voltage-source-converter (VSC). The basis is a conversion technique that transforms a harmonic-transfer-function (HTF)-based model into a SISO equivalent model while...
Article
This paper proposes an integrated method for generating the voltage-source-converters’ (VSCs’) periodical steady-state (PSS) conditions and the harmonic-state-space (HSS)-based impedance model. Since these two objectives can be realized in one unified frequency-domain iteration process, it is briefly referred to as the automatic model generation (A...
Data
This is the conference presentation of the paper with the same title. The paper was presented at IEEE - IECON, In Lisbon, Portugal, October 2019.
Conference Paper
Full-text available
Two different single-phase synchronisation schemes based on orthogonal system generation (OSG) are modelled in the linear, time-periodic framework. The frequency adaptive Hilbert phase locked loop (PLL) and the frequency-fixed second-order-generalised-integrator (SOGI) PLL fit smoothly into existing models for the synchronous reference frame PLL, d...
Preprint
Full-text available
A Hilbert filter design is proposed with the intent of assembling a simple, yet frequency adaptive single-phase grid synchronisation unit. The simplicity lies not with the filter itself, but with the linearity of the orthogonal system generator (OSG) and its absence of frequency feedbacks. This is a trait shared with many standard, frequency fixed...
Conference Paper
Full-text available
This paper investigates a combination of methods to extract modal information from synchrophasor measurements. Ringdown measurements have been preprocessed with Empirical Mode Decomposition (EMD), analyzed with Prony's method and the results postprocessed with clustering techniques. Ambient measurements before and after a disturbance have been anal...
Conference Paper
Full-text available
This paper investigates the theory, intuition and performance of two known implementations of Prony's method. Such methods are useful for identifying the individual modes of a system without constructing a component-based model. In the Smart Grid, Prony Analysis has been widely used on post-disturbance ring-down measurements, which have been increa...
Data
In the Smart Grid, Prony Analysis has been widely used on post-disturbance ring-down measurements, which have been increasingly available with the extensive deployment of PMU’s. This method decomposes the signal into decaying sinusoidals, and estimate the frequency, damping, amplitude and phase of each modal component. This upload is the Poster ver...
Thesis
Full-text available
This thesis delves into the two fields of signal analysis and small-signal stability of power systems. Due to the extensive deployment of PMUs in today s Smart Grid, new possibilities arise to assess the small-signal stability by measurement based techniques. The benefits of this approach are many, the most compelling being that the power system ha...

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Projects

Projects (2)
Project
The project covers activities and publications related to Microgrids. It includes modelling, planning and operation for both connected and isolated microgrid operation. Additionally, tools and techniques for stability and dynamic interaction studies are covered.
Project
This research work will focus on different mathematical algorithms employed on output of PMU (phasor measurement unit) in power system. Both developments and applications of these algorithms will be assessed in this work.