PhD Defense by Michael Pertl

Thesis title: Observability and Decision Support for Supervision of Distributed Power System Control

Science Summary:
Traditionally, electric power systems were operated with large stability margins. The main task of control room operators was to maintain the balance of generation and demand by controlling large centralized power plants.
Nowadays, ambitious goals to reduce greenhouse gas emissions drives the transition from fossil fuel based electricity generation to renewable energy sources (RES), such as wind and photovoltaics (PV). In addition, the electrification of transportation introduces additional large loads mostly connected at the lower voltage levels, e.g. electric vehicles (EVs) connected at residential homes. As the power output of RES cannot be controlled and large-scale deployment of EVs radically changes power flows in distribution but also transmission grids, the operation of electric power systems becomes more challenging.
In order to keep up with these changes, existing tools that support control room operators in operating the power system need to be enhanced and additional tools need to be developed to complement them. Having the right tools to monitor the power system, and to support the control room operator when making important operational decisions is a fundamental requirement for appropriate situation awareness.
The dissertation focused on three selected aspects to increase the situation awareness and improve decision support of control room operators.
The thesis proposes:
 a tool for preventive re-scheduling of generators to maintain the power system in a state with sufficient security margins to be able to withstand possible contingencies.
 a data-driven neural network approach for voltage estimation in distribution grids with high penetration of dispersed RES-based generation.
 a model which allows to aggregate large numbers of EVs and to harness their flexibility, i.e. controlling the charging behavior by shifting the demand in time.
All three covered aspects are aimed at improving the situation awareness of the operator, and to enable advanced controllability of distributed resources. On the one hand, this will give the operator more knowledge about the state of the power system leading to better decisions. On the other hand, extended controllability will allow enhanced operation.

Principal supervisor: Senior Scientist Henrik W. Bindner, DTU Elektro CEE, DTU
Co supervisor: Associate Professor Mattia Marinelli, DTU Elektro CEE, DTU
Co supervisor: Assistant Professor Kai Heussen, DTU Elektro CEE, DTU

Associate Professor Chresten Træholt, DTU Elektro CEE, DTU
Associate Professor Roberto Turri, Università di Padova
Andrew Keane, Head of UCD Energy Institute, University College Dublin

Chairperson at defense:
Associate Professor Nenad Mijatovic, DTU Elektro CEE, DTU




Thu 01 Mar 18
13:00 - 18:00


DTU Elektro


DTU - Risø Campus
Building 112, Niels Bohr Auditorium
Frederiksborgvej 399
4000  Roskilde
22 FEBRUARY 2018