Maria Vrakopoulou

A Linear AC Power Flow Model for Unbalanced Multi-Phase Distribution Networks Based on Current Injection Equations

Adel Heidari-Akhijahani, Amir Safdarian, Maria Vrakopoulou

Journal article  |  2021  |  IEEE TRANSACTIONS ON POWER SYSTEMS

A realistic and practicable modeling of unbalanced distribution networks (DNs) is the missing link in most studies undertaken in t..

Assessment of the Capacity Credit of Renewables and Storage in Multi-Area Power Systems

Guanchi Liu, Maria Vrakopoulou, Pierluigi Mancarella

Journal article  |  2021  |  IEEE TRANSACTIONS ON POWER SYSTEMS

Capacity credit (CC) can be defined as the capacity of conventional generators that can be replaced by renewable energy sources (R..

Chance-constrained optimal capacity design for a renewable-only islanded microgrid

S Geng, M Vrakopoulou, IA Hiskens

Journal article  |  2020  |  Electric Power Systems Research

Microgrids offer a promising opportunity for achieving greater use of renewable generation. In this paper, we consider optimal cap..

Incorporating new power system security paradigms into low-carbon electricity markets

B Skinner, P Mancarella, M Vrakopoulou, I Hiskens

Journal article  |  2020  |  Electricity Journal

Australian Electricity Markets are integrating variable renewable energy sources at rates faster than anywhere in the world. South..

Optimal Capacity Design and Operation of Energy Hub Systems

S Geng, M Vrakopoulou, IA Hiskens

Journal article  |  2020  |  Proceedings of the IEEE

This article takes an integrated view of optimized capacity design and operation of islanded energy hubs. We consider energy hubs ..

Chance Constrained Reserve Scheduling Using Uncertain Controllable Loads Part II: Analytical Reformulation

Bowen Li, Maria Vrakopoulou, Johanna L Mathieu

Journal article  |  2019  |  IEEE TRANSACTIONS ON SMART GRID

This paper is Part II of a two-part paper that develops a multi-period chance constrained optimal power flow model to schedule gen..

Chance Constrained Reserve Scheduling Using Uncertain Controllable Loads Part I: Formulation and Scenario-Based Analysis

Maria Vrakopoulou, Bowen Li, Johanna L Mathieu

Journal article  |  2019  |  IEEE TRANSACTIONS ON SMART GRID

This paper develops a multi-period chance constrained optimal power flow model to schedule generation and reserves from both gener..

Capacity Credit Evaluation Framework of Wind, Solar and Pumped Hydro Storage Considering Generation Adequacy and Flexibility

Guanchi Liu, Maria Vrakopoulou, Pierluigi Mancarella

Conference Proceedings  |  2019  |  2019 9TH INTERNATIONAL CONFERENCE ON POWER AND ENERGY SYSTEMS (ICPES)

Conventional capacity credit evaluation only focuses on generation adequacy. It is assumed that as long as there is sufficient cap..

Optimal control policies for reserve deployment with probabilistic performance guarantees

M Vrakopoulou, IA Hiskens

Conference Proceedings  |  2018  |  2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017

The generation uncertainty that is introduced by renewable energy sources (RES) may increase power system operating costs due to t..

Optimal policy-based control of generation and HVDC lines in power systems under uncertainty

M Vrakopoulou, IA Hiskens

Conference Proceedings  |  2017  |  2017 IEEE Manchester PowerTech, Powertech 2017

Developing methodologies with a good trade-off between operational costs and reliability in the presence of uncertainty from renew..