Konrad Diwold

Pro2Future · Cognitive Products

Ultra-wideband (UWB) technology has become very popular for indoor positioning and distance estimation (DE) systems due to its decimeter-level accuracy achieved when using time-of-flight-based techniques. Techniques for DE relying on signal strength (DESS) received less attention. As a consequence, existing benchmarks consist of simple channel char...

Globalization in the field of industry is fostering the need for cognitive production systems. To implement modern concepts that enable tools and systems for such a cognitive production system, several challenges on the shop floor level must first be resolved. This paper discusses the implementation of selected cognitive technologies on a real indu...

This paper presents a novel approach to improving wireless communications in harsh propagation environments to achieve higher overall reliability and durability of wireless battery powered sensor systems in the context of in-vehicle communication. The goal is to investigate the physical layer and establish an antenna recommendation system for a spe...

Safety-critical automation often requires redundancy to enable reliable system operation. In the context of integrating sensors into such systems, the one-out-of-two (1oo2) sensor architecture is one of the common used methods used to ensure the reliability and traceability of sensor readings. In taking such an approach, readings from two redundant...

Recovering causality from copious time series data beyond mere correlations has been an important contributing factor in numerous scientific fields. Most existing works assume linearity in the data that may not comply with many real-world scenarios. Moreover, it is usually not sufficient to solely infer the causal relationships. Identifying the cor...

Achieving reliable wireless communications using COTS devices in vehicles has been an unattainable target so far. One reason is that the high safety requirements of automotive applications cannot be met by the relative unreliability of wireless communication in such complex environments. This poster presents an approach for utilizing RSSI as a firs...

The number of Commercial-Off-The-Shelf (COTS) microprocessors and microcontrollers used in safety applications increased significantly over the last decade. In contrast to safety-certified microcontrollers, these microcontrollers are produced without integrated protection against memory soft errors, and limited in terms of available memory and comp...

Dependable communication is a cornerstone for industrial IoT applications. In hostile environments it is challenging to achieve a robust wireless communication link. This work investigates how the robustness of wireless communication can be improved by optimizing the design of antennas as well as the position of the antennas and sensors in the envi...

The next step for companies towards smart manufacturing is to process the previously integrated and contextualised data to create manufacturing intelligence. This poster presents a use case for enhancing self-awareness, contextual-awareness, and peer-to-peer awareness to a Programmable Logic Controller (PLC) by using low-cost IoT equipment. An expe...

Intelligent manufacturing systems are based on seamless and flexible interaction in Cyber-Physical-Systems of Systems. Novel research approaches in computer science allow to bring intelligence to the shop floor in general and robotic systems in particular. New concepts are needed to support the worker in their interactions with the intelligent mach...

The trends for connected and automated vehicles and their related technologies are radically changing the automotive industry: from engineering automotive systems, through their production and down to their use. All of these phases will be characterized by a high level of dynamism: the driving behavior of automated cars and production processes in...

BIFROST is a persistent, shared design tool and simulation environment for Smart Cities, with a strong focus on powergrid infrastructure. Backed by a reactive server backend and powerful simulation engine, a browser-based, 2.5D user interface empowers researchers, network operators and planning experts to construct and analyze situations revolving...

Automation has arrived in the low voltage grid domain. In the next few years, the secondary substation —at the barriers of medium and low voltage grids—will thus be upgraded to enable novel functions. In this paper, we present various smart grid applications running on such intelligent secondary substations (iSSN) including their interaction with e...

The advent of distributed energy resources in conjunction with recent developments in the context of smart embedded devices has fostered the increased integration of intelligent generators and prosumers into the energy system. As a consequence, previously passively operated grids have become highly dynamic environments, which require active monitor...

For the operation of electrical distribution system an increased shift towards smart grid operation can be observed. This shift provides operators with a high level of reliability and efficiency when dealing with highly dynamic distribution grids. Technically, this implies that the support for a bidirectional flow of data is critical to realizing s...

Die Energiewende bewirkt eine Transformation des Energiesystems, die zu großen Herausforderungen für den Verteilernetzbetrieb führt. Dies ist der Tatsache geschuldet, dass bis dato passive Verteilernetz-Abschnitte, welche historisch reine Verbraucher waren, nunmehr durch dort verortete dezentrale Erzeugung und proaktive Netzteilnehmer – wie Photovo...

Novel Smart Grid functions demand for reliable grid topology information. Currently, on distribution grid level, such information is only statically (i.e. configured once – e.g., in CIM or alike format) or not at all available. The static topology data may become invalid due to a switching action or grid extension. In this paper we present a Smart...

This proposal presents a prototypical realization of the “Reactive Operations” concept. The core feature of the “reactive operations” is to present an operator only with information in case this information is required by the operator to identify unsuitable system behavior (e.g. if faults occur) and to bundle the presented information event specifi...

IoT-functionality can broaden the scope of distribution system automation in terms of functionality and communication. However, it also poses risks regarding resource consumption and security. This article presents a field approved IoT-enabled smart grid middleware, which allows for flexible deployment and management of applications within smart gr...

The digitization of power grid infrastructure reaches the distribution grid level. Novel applications on substation level and their implementation on thousands of automation components will result in an increase of operational efforts that is likely to exceed the economic advantage of the applications. To counteract this negative trend, this work p...

Interaktionen zwischen Gebäuden und Verteilnetz im Smart Energy System der Seestadt Aspern

The transition of classical power distribution grids towards actively operated smart grids locates new functionality into intelligent secondary substations. Increased computational power and newly attained communication infrastructure in thousands of secondary substations allow for the distributed realization of sophisticated functions, which were...

Co-simulation is an established approach for Smart Grid simulations as it allows to break down the very complex system into sub-systems. The modularity of co-simulation environments makes easy to distribute it across different sites. One reason for such a distribution may be, that this way confidential software can stay within its secure domain. Ho...

Conventional methods of on-load tap changer transformer (OLTCs) based voltage control in low Voltage (LV) distribution grids turn out to be more and more difficult. This is due to constant growth of distributed infeed (e.g. from photovoltaic systems) and the emergence of new electric load types (e.g. electric cars, heat pumps). New concepts to face...

Intelligente Applikationen für Smart Urban LV Grids

Developing the Smart Grid as complex System of Systems has proven to be a challenging task. To foster the cooperation of stakeholders across different domains it is necessary to provide a common language covering the needs of all involved parties. The European Smart Grid Architecture Model (SGAM) provides a suitable framework for development. By no...

The need to know the exact placement of a certain sensor or smart meter in a network is indispensable for all sorts of applications. From the network operator's enterprise application down to local control applications using real-time measurements for active integration of renewables. Available data from the communication systems of these metering...

Die vermehrte Integration dezentraler Erzeuger in die europäischen Verteilernetze führt zu einer Transformation der europäischen Energieversorgung. Zukünftig wird es vermehrt zu Konflikten zwischen überregionalen Marktaktivitäten und (technischen) lokalen Netzgrenzen kommen. Eine Möglichkeit zur Lösung dieser Konflikte besteht in der Schaffung eine...

"Flexibility Operator" - Marktbasierter Ansatz für die Koordination von Markt und Netz

In dieser Veröffentlichung wird ein zentrales Regelungsverfahren vorgestellt, welches die Erfüllung von Blindleis-tungsvorgaben des Hochspannungsnetzbetreibers am 110 kV-Netzverknüpfungspunkt (NVP), mittels gesteuerter Blind-leistungsbereitstellung durch dezentrale Erzeugungsanlagen (DEA) in der Mittelspannungsebene ermöglicht. Das vor-geschlagene...

The massive deployment of grid-connected PV in recent years has brought PV penetration in the electricity grids to levels where the conventional fit-and-forget approach to interconnecting PV reaches its limits. In many cases, constraints and limitations of existing electricity infrastructure already have evolved to one of the key barriers delaying...

During the past four years, national experts from thirteen institutions around the world have worked together within the International Energy Agency (IEA) PVPS Task 14 Subtask 2 – High Penetration PV in Local Distribution Grids. The main aim of this collaboration was to identify industry’s best practices for achieving high penetration levels of PV...

First, we investigate the technical and economic potential of autonomously operating voltage control strategies in low voltage grids with high photovoltaic penetration. The investigated control strategies are based on the reactive power control capabilities of modern photovoltaic inverters and the application of distribution transformers with on-lo...

In this paper a novel co-simulation is developed, to study the dynamic exchange of reactive power from a distribution grid to the transmission grid. This exchange is performed under a regulatory scheme. In particular, a distribution grid optimizer signals to the transmission grid the available reactive power interval at the distribution/transmissio...

In this study, technical as well as economic aspects of local and central coordinated voltage control strategies, which are based on reactive power provision from the distributed generators, will be analyzed in the context of high penetration of renewable energy resources in European medium voltage distribution networks. An economical evaluation of...

Energy supply systems are facing significant changes in many countries around the globe. A good example of such a transformation is the German power system, where renewable energy sources (RESs) are now contributing 25% of the power needed to meet electricity demand, compared with 5% only 20 years ago. In particular, photovoltaic (PV) systems have...

To improve the integration of distributed energy resources on distribution networks, new DMS functionalities need to be developed. To run near-to-real time DMS applications novel high performance computing and communications technology solutions can be adopted by DNO's. Therefore, this paper presents the work carried out in the HiPerDNO project reg...

This book constitutes the refereed proceedings of the International Conference on the Applications of Evolutionary Computation, EvoApplications 2013, held in Vienna, Austria, in April 2013, colocated with the Evo* 2013 events EuroGP, EvoCOP, EvoBIO, and EvoMUSART. The 65 revised full papers presented were carefully reviewed and selected from 119 su...

This book constitutes the refereed proceedings of the International Conference on the Applications of Evolutionary Computation, EvoApplications 2013, held in Vienna, Austria, in April 2013, colocated with the Evo* 2013 events EuroGP, EvoCOP, EvoBIO, and EvoMUSART. The 65 revised full papers presented were carefully reviewed and selected from 119 su...

With the increased integration of distributed energy units (DERs) on the MV/LV level, operators of distribution systems are currently facing a challenge in terms of voltage control. Distribution systems that were initially designed for distributed consumption and central generation now face decentralized feed-in. Decentralized feed-in at the MV/LV...

The artificial bee colony optimization (ABC) is a population-based algorithm for function optimization that is inspired by the foraging behavior of bees. The population consists of two types of artificial bees: employed bees (EBs) which scout for new, good solutions and onlooker bees (OBs) that search in the neighborhood of solutions found by the E...

The identification of protein binding sites and the prediction of protein-ligand complexes play a key role in the pharmaceutical drug design process and many domains of life sciences. Computational approaches for protein-ligand docking (or molecular docking) have received increased attention over the last years as they allow inexpensive and fast pr...

During reproductive swarming and seasonal migration, a honeybee swarm needs to locate and move to a new, suitable nest site. While the nest-site selection process in cavity-nesting species such as the European honeybee Apis mellifera is very precise with the swarm carefully selecting a single site, open-nesting species, such as Apis florea, lack su...

In recent years social insects have been a major inspiration in the design of new computational methods. This chapter describes three examples of the application of ant-inspired methods in the domain of Organic Computing. The first example illustrates implications of theoretical findings in response-threshold models that explain division of labour...

Water supply networks are of high economical importance. Accidental or deliberate contaminations pose a great threat to such networks and can have wide-ranging implications. Early warning systems can monitor the quality of the water-flow in such systems by means of sensors distributed in the network and report potential contaminations to minimize h...

The artificial bee colony optimization (ABC) is a population based algorithm for function optimization that is inspired by the foraging behaviour of bees. The population consists of two types of artificial bees: employed bees (EBs) which scout for new good solution in the search space and onlooker bees (OBs) that search in the neighbourhood of solu...

In recent years several bee inspired optimization techniques have been proposed. These methods are either based on the bees' foraging or mating behavior. Both foraging and mating regulate distributions outside (foraging) or within a colony (mating). Foraging determines the ratio of individuals that explore the surroundings for new food sources and...

In this chapter we discuss honey bee optimisation algorithms, which constitute a new trend in the field of swarm intelligence. As the name suggests this class of algorithms is based on the behaviour of honeybees. Current algorithms are based on either of two principles: foraging or mating. Algorithms based on mating utilize the behavioral principle...

Response threshold models are an important tool to model division of labor in social insects and to investigate the underlying principles of self-organization. In this article response threshold models which incorporate dynamic environments with varying demand for work and their influence on division of labor are studied. In their natural habitats,...

Wat dacht je van een vakantie bestaande uit een week van goed opletten, had werken en weinig vrije tijd? Wie gaat er hartje zomer een hele weerk besteden aan lezingen, programmeerwerk en sociale bijeenkomst met totaal onbekenden? Je zou haast denken dat niemand daartoe bereid is. Toch kwamen hier belangstellende studenten en onderzoekers uit meer d...

This paper presents a discussion of coordination properties within populations or geospatially distributed embodied agents. We define two axes: interaction mechanisms and population diversity; and we present a new framework designed for exploring the relationship between values along these axes and the efficiency of solutions for a set of related t...