Lunch Lectures Former

The concept of the PowerWeb lunches is to discuss amongst Smart Grids researchers and update each other on ongoing activities. So we ask a presenter to talk for about 15-20 minutes at most, such that we have time not only for a discussion on the presented work, but also give an opportunity to learn more about other ongoing Smart Grid related research in Delft.

The talks and discussions are aimed at researchers in this domain, having a background ranging from policy analysis to computer science and power engineering. This makes it harder to talk about technical details, but it allows for a more lively interaction. 

May 11

Jos Blom

Storage or Sharing Energy
The shift from storage based fossil to flow based nature energy sources is there.  
Energy storage seems important in the needed flexibility but creates new losses and needs materials.
Alternative solutions are necessary and will be discussed.


April 13

Auke Hoekstra

Twente University; Spark City, E-laad

Modelling the meteoric rise of electric vehicles from different perspectives

Car batteries are becoming ever lighter and their price has fallen tenfold since the start of this millennium. The recent GigaFactory and advances in lithium sulfur and solid-state batteries will drive the price down still further. Already battery costs are offset by the costs of energy and maintenance. This will drive the swift adoption of electric vehicles (EVs).

EVs are interesting from different perspectives. Their importance for car and battery manufacturers is obvious. From a global/national policy perspective they are interesting because they can reduce CO2 emissions. From a local policy perspective because they reduce air and noise pollution. From an energy production and grid-operator perspective because their can either unbalance the grid or (by using smart charging) balance the grid. And finally from a consumer perspective because EVs provide instant torque and cost much less to maintain.

How do you combine these perspectives to create a "quantified narrative" that can predict pathways of adoption? Auke recently made a best guess report for parliament (with Ecofys) but to make really good predictions he is working on an agent-based buying, charging, driving (ABCD) model, together with students from Delft, Eindhoven and Utrecht. This lecture will outline what the recent developments in electric vehicles are and how you can predict what their future looks like.



Feb 9

Ariana Ramos MSc

DSO-TSO interactions in local flexibility contracting
In a world where renewable energy is integrated into the distribution network users are empowered to make decisions for themselves. Distribution grids are first in line to feel the effects of a rapidly changing network topology. Flexibility procurement is a possible solution to deal with the integration of distributed resources. Given the different objectives of system operators and market participants, coordination mechanisms are necessary for flexibility contracting. Market design propositions enabling the short-term contracting of location specific flexibility resources are analysed for both local and system-wide use. The need for local congesion management is handled through local procurement taking into account the different objectives of the system operators and market participants.

Jan 12

Prof.dr. Braham Ferreira

Wireless Power Web
The electric grid is defined by a network of copper and aluminium conductors that connects loads and sources to distribute and transmit electricity over large geographic areas and distances. A power system without this backbone of overhead and buried cables, transformers and substations was never an option until now. A more flexible and adaptable alternative has become feasible potentially much lower cost which has a smaller impact on the environment. The network of conductors is becoming optional because of the availability of “wireless energy” from the sun in combination with wireless communications.

Dec 8 Kees Vuik

Numerical Mathematics for Power Networks
Networks for the high-voltage distribution of electrical energy are currently undergoing far reaching developments. National power grids are evolving from static entities, producing mainly a uni-directional flow from generation to loads, to more dynamic and decentralized structures.These emerging power systems should accommodate the local generation by renewable sources and peak demands of electrical vehicle charging. The cross-border interconnection of power grids further imposes new challenges in the design, planning and daily operation of these networks. In this presentation an overview of the various research projects done in the chair of numerical analysis at the TU Delft are presented.

Sept 8 Tamas Keviczky

Aquifer Thermal Energy Storage Smart Grids
Abstract: Roughly 2000 Aquifer Thermal Energy Systems (ATES) are installed in the Netherlands. Within 10 years, it is expected that this number will increase to 20.000 leading to a reduction of 11% in CO2 emissions of the built environment, along with estimated savings of 4 billion euros in the coming 30 years. At a global scale, the energy saving potential of ATES is even bigger. However, current performance of ATES does not live up to expectations and the projected efficiency remains below earlier prognoses. The disappointing actual contribution of ATES to energy efficiency is mainly due to current operation and regulation practices that cannot cope with uncertainties in aquifer characteristics, interaction of neighbouring systems, and variability in weather conditions and use of buildings. ATES interact via the groundwater aquifer in a way comparable to how distributed sources and sinks of electricity are interacting via the electricity grid. In ATES, however, the links are dynamically time-varying and plagued by uncertainty due to the absence of models and cooperation regarding interaction of nearby systems. Distributed Model-based Predictive Controllers (DMPC) promise significant benefits by ensuring near-optimal operation and regulation of ATES grids while enforcing critical operating constraints. However, stochastic uncertainties with probabilistic time-varying constraints have never been incorporated in the design of such a distributed control network. This research sets out to deliver a proof-of-concept for the potential of DMPC in the development of ATES systems into ATES Smart Grids.

July 4

Professor Xiliang Zhang

"Technologies and Policies for the Transit to a Clean and Low Carbon Energy Economy in China"
The talk will firstly present China’s energy dilemma in its modernization process and its motivations for the transit to a clean and low carbon economy. Then it will explore the technological and policy options for achieving sustainable energy system transformation to address both climate change and air pollutions, by applying an integrated assessment modeling framework developed jointly by Tsinghua University and MIT. It will give an overview of the major policy measures that the Government has adopted over the past decade to promote the transformation and also introduce some new policy initiatives for the 13th Five-Year-Plan.

May 12

Peter Vaessen DNV GL

"future transmission grids, trends and long term needs"

April 14

Rick van Staveren en

Thijs Paes


"Uniper Benelux - The optimization of combined heat and power assets in an uncertain market"

First we will give insights in the current business of Uniper Benelux. In the Netherlands Uniper operates three coal plants (including one brand new unit) on the Maasvlakte in the Rotterdam harbor and many gas plants that are all connected to district heating systems. We will explain how we currently operate these plants and share our vision on the current developments in the energy market.Secondly, we will use some examples which will show the optimization issues we do not have a solution to yet, and hope we can get a lively discussion about how to come closer to possible solutions. These issues include a new electric boiler, which will mainly run on electricity from the imbalance market, which by definition is difficult to forecast. Furthermore, our district heating networks are becoming opened up to more producers, however, most producers operate on both the electricity market and the heating market and production offers are mutually exclusive while the markets are not integrated, this makes it difficult to optimize the system. Finally we are currently making plans to communicate hour-to-hour heat prices to some of our greenhouse costumers which will hopefully use demand response and make the entire system cheaper to operate, however, the impact of the demand response will change the price of the heat, especially if all greenhouses respond in the same manner to the communicated prices.


Mar 11

Theo Rieswijk

“Smart Grids need Smart Buildings”

Abstract: When realizing smart grids, the automation of the nodes (e.g. buildings) in these grids will play an important role. Therefore Priva, a manufacturer of automation and advisory solutions for climate and energy management in the utility and the horticulture, can be seen as an important player in this process. To illustrate this several relevant research, innovation and development projects will be presented. In order to make a building “smart” a number of subsequent steps will be illustrated, departing from a system overview of the relevant climate and energy management processes in a building, focusing on heating and cooling.

Feb 11

German Morales

"How Good are The Traditional Optimal Energy Scheduling Approaches?"

Jan 14

André Teixeira

"Cyber Security and Smart Energy Grids"

Smart Energy Grids are increasingly more dependent on ICT infrastructures, which facilitate the real-time monitoring and operation of energy systems so that stringent operational requirements can be met. Consequently, Smart Energy Systems and their physical infrastructure also become vulnerable to cyber incidents, which may span from software flaws and hardware malfunctions of ICT devices, to malicious actions such as remote access over communication networks, Denial-of-Service, and false-data injection attacks. 

This talk discusses some of the cyber security challenges faced by Smart Energy Grids.  A special focus is given to the notion of “risk” and the characterization of adversarial models and threat scenarios, which are a cornerstone for performing risk analysis of such threats and to develop suitable risk mitigation approaches. Examples spanning from false-data injection attacks on power transmission networks and adversarial actions on voltage control schemes for distribution networks are presented.


Jan 6

Johan Enslin

"Grid Modernization with Energy Storage"
The presentation will discuss the role of energy storage technologies in grid modernization. Priority will be provided to technologies and approaches that provide clean power integration, energy efficiency, stacked performance and business case solutions in modernizing the grid.

Dec 10

Marjolein Hulsebosch STEDING

"How FLEX should the Dutch energy system be? Five challenges for the grid operator!"
Due to the growth of renewable sources, the electrification of demand and active participation of consumers, Stedin (Dutch grid operator) and other players in the energy market are dealing with the question: how to keep the energy system reliable, affordable and sustainable? Facilitating, retrieving and using flexibility in the energy system can be one of the answers. The current market for flexibility is driven by balancing the system and managing volatility. The flexibility market for (local) congestion management will develop in the coming years. Therefore Stedin is dealing with: when and where will congestion occur? What is the value of flexibility(f.e. storage)? What will be our role in this new market? By means of trends, current research and pilots I will share a vision on flexibility and the main challenges Stedin is facing. 

Nov 12

Miro Zeman


"Integration of photovoltaics in future electricity systems"

Oct 8

Wolf Ketter


"Tackling Wicked Problems with Trading Agent Competitions: The Power TAC Experience"
The shift towards sustainable electricity systems is one of the grand challenges of the twenty-first century. Decentralized production from renewable sources, electric mobility, and related advances are at odds with traditional power systems where central large-scale generation of electricity follows inelastic consumer demand. Information Systems innovations can validate new forms of dynamic electricity trading that leverage real-time consumption information and that use price signals to incentivize sustainable consumption behaviors. However, the best designs for these innovations, and the societal implications of different design choices are largely unclear. We are addressing these challenges through the Power Trading Agent Competition (Power TAC), a competitive gaming platform on which numerous research groups now jointly devise, benchmark, and improve potential solutions to the sustainable electricity challenge.
Based on the Power TAC community's results, we give preliminary empirical evidence for the efficacy of competitive gaming platforms, and for the community's contributions towards resolving the sustainable electricity challenge.

Sept 10

Phil Vardon

"Grounding heat energy sources and storage"

The search for novel materials, energy sources and the holy grail of energy management, energy storage, is ongoing.  Among all of the renewable energy sources, there is one source that is prevalent everywhere – the ground.
The ground acts as a large natural solar collector – and due to its properties of relatively high thermal capacity and low thermal conductivity, is able to store large quantities of energy near the surface. It is possible to inject heat into the ground to store excess heat produced from other processes and to extract heat to use as space heating during the winter, usually with the use of a heat pump.
However, this does not come without problems.  The heat is low grade. The ground is heterogeneous.  Multiple users would like to use the same piece of ground.  Systems don’t often perform as designed.
In this talk, the potential benefits of using the ground as a heat source/store will be outlined, a viewpoint on where ground-source heat and storage can fit into the wider energy landscape will be given and an opinion of future research directions will be given.

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June 11

Mijnwater BV

"Intelligent thermal smart grid as key element for the future energy infrastructure".
Geothermal energy - in several common forms- is an essential part of this infrastructure. This means not only through abandoned mines, but also applying deep and shallow geothermal. In the meanwhile the geothermal reservoir in Heerlen shows a good example of reusing old mines. The mines again will be used to feed the need for heating and cooling from its huge water reservoir (billions of litres). As a difference it is used now for the generation and buffering of clean, durable energy instead of the extraction of fossil coal. This brings new business to the area and fulfils the local energy need. 

During and after the talk, we would like to discuss with you potential next steps and future collaboration with European Universities. 


• Louis Hiddes, Director
• Herman Eijdems, innovatiemanager and until 2011 head Bouwfysica Rijksgebouwendienst Den Haag 
• René Verhoeven, graduated in Aken – procestechnologie en clustermanager



Joost Bakker

In this presentation dr. Joost Bakker will discuss the elements that make the difference between a good poster and a bad one. Joost brings more than 20 years of experience with presenting scientific data, both from academia and industry. With his company Scicomvisuals, Joost specializes in scientific communication, and focuses on developing posters, presentations, infographics and animations to explain complex scientific messages. 

February 12

Lou van der Sluis

During this lunch lecture, professor Lou van der Sluis:  “You think you know what electricity is? You don't! - Come to know what you always wanted to know but didn’t dare to ask. The whole idea is that we talk all the time about electricity without knowing what it is about exactly. During this lunch lecture Lou van der Sluis will talk about some fundamentals of electricity and our electricity grid.



Laurens de Vries and Remco Verzijlbergh

In the study they present, possible congestion management mechanisms for price-responsive electric vehicle demand in electricity distribution networks are investigated. Because a high penetration of renewable energy sources weakens the correlation between wholesale electricity prices and network demand, cost-minimizing electric vehicles may cause high peaks in network load. Managing these grid congestion issues is not costly in theory but difficult to implement efficiently. Simple, pre-determined time-of-use tariffs are compared with two 'optimal' mechanisms: a price-based mechanism and a capacity-based mechanism.  The study thus brings together economical, practical, and computational aspects of various congestion management mechanisms in the context of the major RES integration issues of today.

December 12

Eric Woittiez

Researching a Smart Energy System. Field trial Stad van de Zon - Heerhugowaard

Goal: Researching the energy system of the future:
•Reliable (grid, production)•Affordable (efficient energy use)•Sustainable (optimal use of sustainable energy sources)
Location: Stad van de Zon, Heerhugowaard

•250 households•Since 2003 built in phases•Diverse buildings PV installed on 900 houses •Smart appliances hardly present

November 13th

Frans Campfens 

During this lecture, Frans Campfens from Alliander will give an insight of several internal research programs such as Advanced Analytics of grid parameters for life time estimation of electro technical components, predictive models for the future penetration photo voltaic an electrical vehicles and some views on Smart Grids development is Europe. 

We will stick to the proven format, which is a lunch meeting with a short lecture and lots of time for discussion every second Thursday of each month. This time, Alliander will also seek the discussion with PhD's working on smart grids from TU Delft and of the Powerweb program in special.

October 9th

José Rueda Torres

Mean-Variance Mapping Optimization for the Solution of Power System



Name author: Eveline Zeegers
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