D. Papadaskalopoulos

D. Papadaskalopoulos
Imperial College London | Imperial · Department of Electrical and Electronic Engineering

PhD

About

74
Publications
9,010
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,084
Citations

Publications

Publications (74)
Article
Full-text available
Digitalization is one of the key drivers for energy system transformation. The advances in communication technologies and measurement devices render available a large amount of operational data and enable the centralization of such data storage and processing. The greater access to data opens up new opportunities for a more efficient and decentrali...
Article
Block orders are increasingly adopted in many electricity markets as they enable power producers to implicitly express their unit commitment characteristics and address price volatility risks. However, previous work on the optimal offering problem of a price-taking producer participating in such markets has only considered the simplest type of bloc...
Article
Full-text available
The design of distribution use-of-system tariffs has been traditionally driven by longterm cost recovery considerations. However, the emerging large-scale integration of distributed energy resources motivates the value of tariffs that are more adaptive to short-term conditions, in order to exploit the inherent flexibility of distributed energy reso...
Article
The increasing penetration of small-scale distributed energy resources (DER) has the potential to support cost-efficient energy balancing in emerging electricity systems, but is also fundamentally affecting the conventional operation paradigm of the latter. In this context, innovative market mechanisms need to be devised to better coordinate and pr...
Article
Peer-to-peer (P2P) energy trading has emerged as a promising market paradigm towards maximizing the value of distributed energy resources (DER) for electricity prosumers, by enabling direct energy trading among them. However, state-of-the-art P2P mechanisms either fail to adequately incentivize prosumers to participate, prevent prosumers from acces...
Article
Driven by climate change concerns, Europe has taken significant initiatives toward the decarbonization of its energy system. The European Commission (EC) has set targets for 2030 to achieve at least 40% reduction in greenhouse gas emissions with respect to the 1990 baseline level and cover at least 32% of the total energy consumption in the Europea...
Article
Local energy markets (LEM) have recently attracted great interest as they enable effective coordination of small-scale distributed energy resources (DER) at the customer side, and avoidance of distribution network reinforcements. However, the introduction of LEM has also significant implications on the strategic interactions between the customers a...
Article
Distributed, consensus-based algorithms have emerged as a promising approach for the coordination of distributed energy resources (DER) due to their communication, computation, privacy and reliability advantages over centralized approaches. However, state-of-the-art consensus based algorithms address the DER coordination problem in independent time...
Chapter
Merchant transmission investment planning has recently emerged as a promising alternative or complement to the traditional centralized planning paradigm and it is considered as a further step toward the deregulation and liberalization of the electricity industry. However, its widespread application requires addressing two fundamental research quest...
Conference Paper
Local energy markets (LEM) have recently attracted great interest as they enable effective coordination of small-scale distributed energy resources (DER) at the customer side, and avoidance of distribution network reinforcements. However, the introduction of LEM has also significant implications on the strategic interactions between the customers a...
Article
Full-text available
The investigation of the effects of demand flexibility on the pricing strategies and the profits of electricity retailers has recently emerged as a highly interesting research area. However, the state-of-the-art, bi-level optimization modelling approach makes the unrealistic assumption that retailers treat wholesale market prices as exogenous, fixe...
Chapter
Previous work has introduced and analyzed the concept of hosting capacity of electricity grids from a technical perspective, determining the upper bounds for integrating various types of renewable energy resources without jeopardizing reliability and quality of supply. In order to achieve that, various hosting capacity metrics have been proposed to...
Article
The effective pricing of electric vehicles (EV) charging by aggregators constitutes a key problem towards the realization of the significant EV flexibility potential in deregulated electricity systems, and has been addressed by previous work through bi-level optimization formulations. However, the solution approach adopted in previous work cannot c...
Article
Demand flexibility, involving the potential to reduce or temporally defer electricity demand, is regarded as a key enabler for transitioning to a secure, cost-efficient and low-carbon energy future. However, previous work has not comprehensively modelled the inconvenience experienced by end-consumers due to demand modifications, since it has focuse...
Article
Bi-level optimization constitutes the most popular mathematical methodology for modeling the deregulated electricity market. However, state-of-the-art models neglect the physical non-convex operating characteristics of market participants, due to their inherent inability to capture binary decision variables in their representation of the market cle...
Article
Bi-level optimization and reinforcement learning (RL) constitute the state-of-the-art frameworks for modeling strategic bidding decisions in deregulated electricity markets. However, the former neglects the market participants' physical non-convex operating characteristics, while conventional RL methods require discretization of state and / or acti...
Conference Paper
Full-text available
Bi-level optimization constitutes the most common mathematical methodology for modeling the decision-making process of strategic generation companies in deregulated electricity markets. However, previous models neglect the physical non-convex operating characteristics of generation units, due to their inherent inability to capture binary decision v...
Conference Paper
Distributed, consensus-based algorithms constitute a promising approach for the coordination of distributed energy resources (DER) due to their practical advantages over centralized approaches. However, state-of-the-art consensus-based algorithms address the coordination problem in independent time periods and therefore are inherently unable to cap...
Conference Paper
Full-text available
Previous work has analyzed the role of energy storage (ES) on generation investment planning through centralised cost minimization models which are inherited from the era of regulated electricity utilities. This paper investigates this issue in the context of the deregulated market environment by proposing a new strategic generation investment plan...
Conference Paper
Previous work has analyzed the renewable generation hosting capacity of electricity systems and the relevant value of flexible demand from a techno-economic perspective, considering the balancing and network challenges associated with a large-scale integration of renewables. This paper investigates these issues from a market perspective, considerin...
Conference Paper
Previous work has analyzed the renewable generation hosting capacity of electricity systems and the relevant value of flexible demand from a techno-economic perspective, considering the balancing and network challenges associated with a large-scale integration of renewables. This paper investigates these issues from a market perspective, considerin...
Conference Paper
Flexible demand technologies have attracted significant interest due to their potential value in enhancing the cost-efficiency of low-carbon electricity systems. However, this value has been investigated in the existing literature through traditional centralized models, which are not aligned with the recent deregulation of the electricity industry....
Technical Report
In the context of the Cornwall Local Energy Market (LEM) project, this report aims at reviewing key challenges and providing relevant recommendations associated with the design of electricity markets in the envisaged low-carbon energy future. Therefore the report starts by setting out the policy framework around the decarbonisation of the UK energy...
Article
Full-text available
The envisaged decarbonisation of electricity systems has attracted significant interest around the role and value of energy storage systems (ESSs). In the deregulated electricity market, there is a need to investigate the complex impacts of ESSs, considering the potential exercise of market power by strategic players. This study aims at comprehensi...
Article
Full-text available
The envisaged decarbonisation of electricity systems has attracted significant interest around the role and value of energy storage systems (ESSs). In the deregulated electricity market, there is a need to investigate the complex impacts of ESSs, considering the potential exercise of market power by strategic players. This study aims at comprehensi...
Conference Paper
Merchant transmission investments are regarded as a potential element of a fully liberalized electricity industry. However, the strategic interactions between a large number of merchant investors and the social efficiency of the emerging transmission planning outcome have not been satisfactorily investigated yet. In this context, this paper propose...
Article
Full-text available
Merchant transmission planning is considered as a further step towards the full liberalization of the electricity industry. However, previous modeling approaches do not comprehensively explore its social efficiency as they cannot effectively deal with a large number of merchant companies. This paper addresses this fundamental challenge by adopting...
Article
The envisaged decarbonization of the European power system introduces complex techno-economic challenges to its operation and development. Demand flexibility can significantly contribute in addressing these challenges and enable a cost-effective transition to the low-carbon future. Although extensive previous work has analyzed the impacts of reside...
Article
Full-text available
Previous work on the role of the demand side in imperfect electricity markets has demonstrated that its self-price elasticity reduces electricity producers’ ability to exercise market power. However, the concept of self-price elasticity cannot accurately capture consumers’ flexibility, as the latter mainly involves shifting of loads’ operation in t...
Article
Full-text available
The operation of aggregators of distributed energy resources (DER) is highly complex, since it entails the optimal coordination of a diverse portfolio of DER under multiple sources of uncertainty. The large number of possible stochastic realizations that arise, can lead to complex operational models that become problematic in real-time market envir...
Conference Paper
Realizing the significant potential of electric vehicles (EV) in emerging low-carbon power systems requires the development of suitable business models for EV owners and aggregators. Previous works have focused on silo analyses of single service business models which neglect the full economic potential of EV flexibility. This paper addresses this c...
Conference Paper
Full-text available
Although previous work has demonstrated the ability of large energy storage (ES) units to exercise market power by withholding their capacity, the proposed modeling approaches exhibit certain limitations and have yet to consider the dependency of market power on ES operating strategies. In this paper, the decision making process of strategic ES is...
Conference Paper
Price-based management of distributed energy resources within microgrids is continuously gaining ground due to scalability and privacy limitations of centralized architectures. However, the concentration of flexible loads' response to the lowest-priced periods yields inefficient solutions. A previously proposed measure imposing a flexibility restri...
Conference Paper
Uniform marginal pricing cannot generally support competitive equilibrium solutions in markets with non-convexities, yielding surplus sub-optimality effects. Previous work has identified non-convexities associated with the generation side of electricity markets and proposed different approaches to address surplus sub-optimality. This paper extends...
Conference Paper
Due to the lack of observability and controllability in current distribution networks, the traditional planning and charging framework makes the oversimplifying assumption of uniform supply valuation for every customer of the same sector and every unit of supplied energy. Building on the advanced metering and control capabilities of the emerging sm...
Conference Paper
Full-text available
Although recent studies have investigated the impacts of energy storage on various aspects of power system operation and planning, its role in imperfect electricity markets has not been explored yet. This paper provides for the first time theoretical and quantitative evidence of the beneficial impact of energy storage in limiting market power by ge...
Article
Full-text available
Uniform marginal pricing cannot generally support competitive equilibrium solutions in markets with non-convexities, yielding surplus sub-optimality effects. Previous work has identified non-convexities associated with the generation side of electricity markets and proposed different approaches to address surplus sub-optimality. This paper extends...
Article
Full-text available
In Great Britain, It Is projected that an unprecedented amount of transmission investment will take place in the next decade and that these investments will be the largest transmission network reinforcements since the post-World War II expansion. In Figure 1, the projected range, to 2030, of onshore, offshore, and cross-border investments is presen...
Article
Price-based management of distributed energy resources within microgrids is continuously gaining ground due to scalability and privacy limitations of centralized architectures. However, the concentration of flexible loads' response to the lowest-priced periods yields inefficient solutions. A previously proposed measure imposing a flexibility restri...
Article
THE EUROPEAN ELECTRICITY SYSTEM of the future faces challenges of unprecedented proportions. By 2020, 20% of the European electricity demand will be met by renewable generation while, by 2030, a substantial proportion of the electricity generation would become largely decarbonized. Furthermore, beyond 2030, it is expected that significant segments...
Conference Paper
Dynamic pricing constitutes a promising approach for realizing the significant potential of flexible demand. However, naive application of dynamic pricing leads to demand response concentration at the lowest-priced periods, yielding significant new demand peaks and inefficient system operation. A previously proposed measure imposing a flexibility r...
Article
The envisaged de-carbonization of power systems poses unprecedented challenges enhancing the potential of flexible demand. However, the incorporation of the latter in system planning has yet to be comprehensively investigated. This paper proposes a novel planning model that allows co-optimizing the investment and operating costs of conventional gen...
Technical Report
Full-text available
This report discusses challenges associated with a wide roll out of innovative smart grid solutions, such as DSR trialled in Low Carbon London, for the operation and design of future distribution networks in supporting a cost effective evolution to a low carbon future.
Article
Scalability and privacy concerns have created significant interest in decentralized coordination of distributed energy resources (DERs) within microgrids. Previously proposed approaches, however, fail to achieve feasible solutions under flexible demand (FD) and energy storage (ES) participation. After justifying and demonstrating this challenge, th...
Conference Paper
Full-text available
Uniform marginal prices cannot generally support competitive equilibrium solutions in markets with nonconvexities and yield schedules’ inconsistency and surplus suboptimality effects. Previous work has identified non-convexities associated with the generation side of electricity markets and proposed a generalized uplift approach to eliminate these...
Article
In the deregulated power systems setting, the realization of the significant demand flexibility potential should be coupled with its integration in electricity markets. Centralized market mechanisms raise communication, computational and privacy issues while existing dynamic pricing schemes fail to realize the actual value of demand flexibility. In...
Conference Paper
Demand flexibility and its smart coordination with system objectives attract significant interest due to the increasing penetration of uncontrollable renewable generation into the system and the envisaged electrification of transport and heat sectors. Developed generation expansion planning models have ignored so far technology-specific inter-tempo...
Conference Paper
Realization of the demand flexibility potential in deregulated power systems requires its suitable integration in electricity markets. In previous work, the authors developed a novel market mechanism combining the solution optimality of traditional centralized mechanisms with the decentralized demand participation structure of dynamic pricing schem...
Article
Full-text available
Realizing the significant demand flexibility potential in deregulated power systems requires its suitable integration in electricity markets. Part I of this work has presented the theoretical, algorithmic and implementation aspects of a novel pool market mechanism achieving this goal by combining the advantages of centralized mechanisms and dynamic...
Conference Paper
Realization of the significant demand flexibility potential in deregulated power systems requires its integration in electricity markets. In previous work, the authors developed a novel market mechanism enabling flexible demand participation in the market setting without requiring flexible loads to submit their operational characteristics to a cent...
Conference Paper
This paper builds on previous work by the authors in developing a novel market mechanism enabling decentralized market participation of flexibly-charging electric vehicles (EV) and addresses the challenge of incorporating the effect of the transmission network on market operation. The formulation of the proposed Lagrangian Relaxation (LR)-based mec...
Article
In the emerging power systems setting, the realization of the demand flexibility potential needs to be coupled with its integration in electricity markets. Decentralization of market mechanisms constitutes a major challenge towards the achievement of such integration. In this paper, a decentralized day-ahead pool market mechanism is proposed, based...
Conference Paper
Decentralization of market architecture, accurate expression of demand flexibility in the bidding process and minimum engagement from human users constitute major challenges towards the achievement of direct participation of the demand side in electricity markets. An approach to deal with these challenges in an integrated fashion is proposed in thi...
Article
Existing energy systems and markets are characterized by a relatively small number of participants interacting in high-volume wholesale markets with end-users mainly participating in separate retail markets. This paper presents a work which aims to develop a Distributed Energy Market that brings together all participants in an integrated real-time...
Article
This paper introduces an original methodology for the co-optimization of operating and investments costs associated with the deployment of active management strategies in power distribution networks. The resulting large-scale optimization problem is solved using Benders decomposition. The concept is demonstrated using a module-based generic distrib...
Article
Decentralization of market mechanisms, accurate expression of demand flexibility in the bidding process and minimum engagement from human users constitute major challenges towards the realization of direct participation of the demand side in electricity markets. This paper addresses these challenges in an integrated way. A decentralized day-ahead p...
Technical Report
Full-text available
This Deliverable report contains the main findings from the work carried out for Task TH2: “Quantifying the impact of Microgrids on investment and replacement strategies of future national electricity infrastructure”, which is the core of Work Package H (WPH) of the More Microgrids project. In particular, a number of models and relevant studies hav...

Network

Cited By

Projects

Projects (7)
Project
The TradeRES project will develop and test innovative electricity market designs that can meet society’s needs of a (near) 100% renewable power system. A long-term sustainable market design needs to provide efficient operational and investment incentives for an electricity system that is characterized by a high share of variable renewable energy sources (VREs) by increasing integration with other energy sectors, e.g. transport and hydrogen, and by increasing participation of flexible electricity demand from households to industrial consumers. Furthermore, this market design needs to provide security of supply by ensuring sufficient controllable electricity generation capacity whilst being economically efficient. Finally, despite the variability of solar and wind energy, the market risks should be allocated in an efficient and socially accepted way. This should also safeguard that consumers are not exposed to extreme swings in their energy expenses. In this sense, this project aims at finding market designs that are economically efficient in the above setting. To achieve these goals the project will use an iterative methodology and involve the key players from the energy sector in order to achieve and test the most suitable market designs. The project TradeRES – Tools for the Design and Modelling of New Markets and Negotiation Mechanisms for a ~100% Renewable European Power System, is funded by the EU framework programme for research and innovation Horizon 2020 under the call H2020-LC-SC3-2019-ES-SCC.