Workshop on Synchrophasors and Control Applications for Power Systems

Workshop on
Synchrophasors and Control
Applications for Power Systems
KTH Royal Institute of Technology,
SmarTS Lab, Stockholm, Sweden
Location: Q2, Osquldas väg 10, Stockholm, Sweden
Wednesday, March 16, 2016
9:00 – 9:10 Coffee and Refreshments
9:10 - 9:20 Welcome and introduction
Vedran Perić, KTH
9:20 - 10:10 SmartTS Lab: Overview and Major Projects
Luigi Vanfretti, KTH
10:10 - 11:00 Near On-line Estimation of hydro power plant transfer functions
from phasor measurements
Kjetil Uhlen, NTNU
11:00 - 11:10 Coffee break
11:10 - 12:00 PMU-based protection for grid operation applications – Wide Area
Monitoring platform and controlled islanding
Marjan Popov, TU Delft
12:00 - 13:40 Lunch break
13:40 - 14:30 Real-time Oscillation Monitoring with Large-Scale PMU data
Mani Venkatasubramanian, Washington State University
14:30 - 15:20 Without tailored modeling data, no satisfactory control at a
reasonable cost
Xavier Bombois, Laboratoire Ampère UMR CNRS 5005
15:20 – 15:30 Coffee break
15:40 – 16:30 Ultracapacitor Based Supplementary Excitation Module for
Improvement of Synchronous Generator Transient Stability
Luis Rouco, Universidad Pontificia Comillas
16:30 – 17:20 The l1 heuristic for the estimation of piecewise constant/linear
signals
Cristian Rojas, KTH

Presenters biographies and talk abstracts
Luis Rouco Rodriguez Title: Ultracapacitor Based Supplementary Excitation Module
for Improvement of Synchronous Generator Transient Stability
Talk summary:
Grid codes were compiled by the TSOs to regulate the activities of the new agents
after the liberalization of the electricity sector. Grid codes include some
requirements that are not demanded by the international standards like the Voltage
Ride Through Capability (VRTC). VRTC are voltage against time curves that every
generator must sustain without tripping from the grid. However, most of the
synchronous generators are not able to fulfil these requirements with current
technology. New solutions are being investigated my generator manufacturers.
Ultracapacitor Based Supplementary Excitation Module (UBSEM) has been
proposed to cope with grid codes VRTC requirements. This device is aimed at
boosting the field voltage during voltage sags in order to increase the generator
critical clearing time and therefore improving the generator angular stability.
Biography:
Luis Rouco obtained his “Ingeniero Industrial and “Doctor Ingeniero Industrial
degrees from Universidad Politécnica de Madrid in 1985 and 1990 respectively.
He is Professor of Electrical Engineering in the Department of Electrical
Engineering of the School of Engineering of Universidad Pontificia Comillas.
He served as Head of the Department from 1999 through 2005. He develops his
research activities at Instituto de Investigación Tecnológica(IIT). Prof. Rouco is the
President of the Spanish Chapter of the Power and Energy Society of IEEE, Member
of Cigré and Member of the Executive Committee of Spanish National Committee
of Cigré. He has been visiting scientist at Ontario Hydro, MIT and ABB Power
Systems.
Kjetil Uhlen Title : Near On-line Estimation of hydro power plant transfer
functions from phasor measurements
Biography:
Kjetil Uhlen received the Master’s and Ph.D. degrees in control engineering in 1986
and 1994, respectively. He is Professor in power systems at the Norwegian
University of Science and Technology (NTNU), Trondheim, Norway, and a Special
Adviser at Statnett (the Norwegian TSO). His main areas of work include research
and education in control and operation of power systems, power system dynamics,
and wind power integration.

Xavier Bombois Title: Without tailored modeling data, no satisfactory control at
a reasonable cost
Talk summary:
In this presentation, we will give an overview of our activities on optimal
identification experiment design. Our general objective is to determine the least
disturbing identification experiment while guaranteeing that the uncertainty of the
identified model is small enough for the intended use of this model (e.g. the design
of a satisfactory control law, monitoring,...). We will pay attention both to the
general philosophy and to recent applications of this philosophy in real-life problems
and we will finish by giving some perspectives for the future.
Biography:
Xavier Bombois was born in Brussels in1974.He received the Electrical Engineering
and Ph.D. degrees from the Université Catholique de Louvain, Louvain-la-Neuve,
Belgium, in 1997 and 2000, respectively.
After his Ph.D. dissertation, he joined the Delft University of Technology, Delft,
The Netherlands, where he was appointed an Assistant Professor with the Delft
Center for Systems and Control in 2001. Since February 2015, he has been a CNRS
Research Director with Laboratoire Ampère, Ecole Centrale de Lyon, Ecully,
France.
His main interests are identification for control, prediction error identification,
optimal experiment design, uncertainty bounding and robust control. Mr. Bombois is
an associate editor for the IFAC journal Control Engineering Practice and for the
Conference Editorial Board of the IEEE Control Systems Society.

Marjan Popov Title: PMU-based protection for grid operation applications –
Wide Area Monitoring platform and controlled islanding
Talk summary:
The talk will present a real-time Wide Area Monitoring platform as well as
techniques for emulation and benchmarking of an existing Wide Area Monitoring
Communication Network. In addition, the talk will discuss intelligent controlled
islanding scheme based on slow coherency
Biography:
Marjan Popov received the Dipl.-Ing. degree from the Ss. Cyril and Methodius
University, Skopje, Macedonia, in 1993 and the Ph.D. degree in electrical power
engineering from the Delft University of Technology (TU Delft), Delft, The
Netherlands, in 2002.
He is currently an Associate Professor of electrical power engineering at TU Delft.
His research interests are large-scale power system transients, intelligent protection
for power systems, and wide area monitoring and protection.
He is a member of CIGRE (International Council on Large Electric Systems) and
Dutch national SC B5 and actively participated in CIGRE JWG C4.402 and JWG
A2/C4.39 as well as CIGRE JWG A2/C4.52. Prof. Popov received the prestigious
Dutch Hidde Nijland award in 2010 for extraordinary research achievements in the
field of electrical power engineering in The Netherlands. He is also a recipient of the
IEEE PES Prize Paper Award and IEEE Switchgear Committee Award in 2011.
Vaithianathan “Mani”
Venkatasubramanian
Title: Real-time Oscillation Monitoring with Large-Scale PMU
data.
Talk summary:
The talk will discuss different algorithms for Real-time Oscillation Monitoring with
Large-Scale PMU data that have been developed at Washington State University.
Biography:
Vaithianathan “Mani” Venkatasubramanian received the B.E. (Hons.) degree in
electrical and electronics engineering from the Birla Institute of Technology and
Science, Pilani, India, in 1986, and the M.S. and D.Sc. degrees in systems science
and mathematics from Washington University, St. Louis, MO, USA, in 1989 and
1992, respectively.
He is currently a Professor with Washington State University, Pullman, WA, USA.
His current research interests include nonlinear system theory and power system
stability and control.

Luigi Vanfretti
Title: SmartTS Lab: Overview and Major Projects
Talk summary:
Modeling and Simulation tools have a broad set of applications in power systems,
from infrastructure planning, through real-time testing of components, and even for
operator decision support systems. Open modeling and simulation standards may
have a large role to play in the development of the Smart Grid, which will have to
overcome challenges related to the design, operation and control of cyber-physical
and sustainable electrical energy systems. Efforts in this direction, mostly obtained
in the EU FP7 iTesla project, will be discussed during the talk.
In addition, simulation tools are essential to the development of Smart Grid
applications - Wide-Area Monitoring, Control and Protection Systems (that is
Synchrophasor Technology) are the key to Smart Grid development for the Smart
Grid. The speaker has over 10 years of experience developing concepts, methods,
and software prototypes of tools that can help in power system operation,
monitoring, control and protection. Results from on-going efforts in the STRONgrid
project regarding applications in transmission networks, and in the EU FP7 IDE4L
project for distribution networks, will be also presented during the talk.
This talk will provide a motivation for the topics discussed above, and sample
results from the aforementioned projects.
Biography:
Luigi Vanfretti received the Electrical Engineering degree from Universidad de San
Carlos de Guatemala, Guatemala City, Guatemala, in 2005, and the M.Sc. and Ph.D.
degrees in electric power engineering from Rensselaer Polytechnic Institute, Troy,
NY, USA, in 2007 and 2009, respectively.
He was a Visiting Researcher with The University of Glasgow, Glasgow, Scotland,
in 2005. He became an Assistant Professor with the KTH Royal Institute of
Technology, Stockholm, Sweden, in 2010 and was conferred the Swedish title of
“Docent” in 2012, and obtained a tenured Associate Professor position in 2013.
He is the Principal Investigator at KTH for the FP7 EU projects iTesla and IDE4L,
and for the NER-funded project. He is currently a Special Advisor in R&D Strategy
and International Collaboration for the Research and Development Division of
Statnett SF, the Norwegian transmission system operator; where he has previously
held positions as Special Advisor in Strategy during 2013–2014, and as external
scientific advisor during 2011–2012. He is an advocate and evangelist for free/libre
and open source software. His research interests are in the general area of power
system dynamics, while his main focus is on the development of applications of
PMU data.
Dr. Vanfretti, has served, since 2009, in the IEEE Power Engineering Society (PES)
PSDP Working Group on Power System Dynamic Measurements, becoming Chair
in 2014. In addition, from 2009 to 2014, he served as Vice-Chairof the IEEE PES
CAMS Task Force on Open Source Software. For his research and teaching work
toward his Ph.D. degree, he was awarded the Charles M. Close Award from
Rensselaer Polytechnic Institute.

Cristian Rojas
Title: The l1 heuristic for the estimation of piecewise
constant/linear signals
Talk summary:
In this talk, we will discuss the use of the l1 heuristic for segmenting time series
with respect to changes in the mean or variance. This technique and its variants,
known as the fused lasso, total variation denoising, l1 trend filtering, ..., has been
also successfully used to address other tasks, such as detecting faults, filtering
images, segmenting ARX models, or estimating threshold policies in Markov
decision processes. Given the wide range of applications of the fused lasso, a
relevant question to address is when does it work, i.e., when does the fused lasso
determine the true change points of the underlying signal (e.g., mean or variance).
We will consider here this question for piecewise constant and piecewise linear
signals, in an approximate support set recovery consistency sense, as the number of
samples tends to infinity. An important aspect revealed by our analysis lies in the
fact that the true change points can be found within an arbitrarily small
neighborhood only in the absence of the so-called staircase problem. If time permits,
we will also discuss how to mitigate this problem by suitably modifying state-of-the-
art linear complexity algorithms for the fused lasso.
Biography:
Cristian Rojas was born in 1980. He received the M.S. degree in electronics
engineering from the Universidad Técnica Federico Santa María, Valparaíso, Chile,
in 2004, and the Ph.D. degree in electrical engineering at The University of
Newcastle, NSW, Australia, in 2008.
Since October 2008, he has been with the Royal Institute of Technology, Stockholm,
Sweden, where he is currently an Associate Professor of the Automatic Control Lab,
School of Electrical Engineering.
His research interests lie in system identification and signal processing.

Workshop on Synchrophasors and Control Applications for Power Systems

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