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Reactive power grid adequacy studies for distribution grids with high distributed generation
(kassel university press, 2020)
The study aims to develop practicable grid planning procedures for an advanced reactive power management at the transmission-distribution (T-D) interface by making use of controllable reactive power sources at the distribution level, like distributed energy resources (DER) and reactive power compensators. In Germany, also the high voltage level is mainly considered as a part of distribution grid, and the T-D interface is determined at the interface between high voltage and extra high voltage level. A predefined ...
Buch
Advanced theory of optical wave propagation and interferometric sensors for topography measurement
(kassel university press, 2020)
This manuscript provides a compendium for the application of the nonuniform wave model to standard problems of two beam interference and addresses common educational issues associated with wave propagation at attenuating interfaces. It also reports scientific advances in interferometric applications focusing on an interferometric point sensor with optical path length modulation and an areal measuring RGB-interferometer for fast topography measurements in the sub millisecond regime.
Buch
Zum Einfluss von Temperatur und Feuchtigkeit auf die elektrische Festigkeit von thermoplastischem Kunststoff, Silikongel und einem daraus resultierenden Schichtisoliersystem
(kassel university press, 2019)
Im Fokus dieser Arbeit steht der Einsatz von technischem Kunststoff, Silikongel und dem Isolationssystem aus beiden Isolierstoffen für elektrotechnische Anwendungen.
Buch
Neue Verfahren zur Wirkungsgradbestimmung an Elektrotraktionsmaschinen
(kassel university press, 2020)
Seit vielen Jahren rücken die begrenzten Ressourcen und der Umweltschutz in den Fokus des täglichen Lebens. Die Energiewende hat das langfristige Ziel einer nachhaltigen Energieversorgung mittels erneuerbarer Energien. Um die nachhaltige Energie auch zur Fortbewegung nutzen zu können, entstehen viele Fortbewegungskonzepte, die überwiegend auf elektrischen Antrieben basieren. Dieser Trend wird durch die Politik stark gefördert und von der Masse mit steigender Akzeptanz angenommen. Wegen der hohen Kosten und der ...
Buch
Off-Board Car Diagnostics Based on Heterogeneous, Highly Imbalanced and High-Dimensional Data Using Machine Learning Techniques
(kassel university press, 2019)
Data-driven maintenance poses many challenges. Four very important of them, namely coping with a high dimensional and heterogeneos feature space, the highly imbalanced data sets, the Remaining Useful Lifetime (RUL) prediction of monitored parts based on short yet variable length timeseries, and already large but steadily further increasing data set size are identified. Each of the challenges is dealt with in one chapter. Novel techniques are designed, implemented, validated, and compared to existing approaches based ...
Buch
Fast Online Control based on Homotopies for Systems subject to Time-Varying Constraints
(kassel university press, 2020)
The integration of intelligent, autonomously acting systems into modern society is a rapidly growing field. After robots are established for simple, recurring processes in industry and everyday life, more complex tasks are of interest which require the systems to consider the environment in their decision making process. In the future, intelligent systems will get access to fields like autonomous driving cars, unmanned aerial vehicle (UAV), manufacturing processes, household, or the assistance to people in need of ...
Buch
A novel evaluation framework for energy losses in low voltage distribution grids
(kassel university press, 2020)
Decentralization of energy generation in power distribution systems is recognized as an important development strategy to incorporate more small-scale renewable sources, reduce greenhouse gas emissions and increase energy efficiency. Beside integrating more decentralized generators into existing systems, an efficient system operation is equally important to achieve an overall sustainable energy system. In order to keep track of upcoming changes regarding system efficiency, an accurate determination of energy losses ...
Buch
Bausteine einer wertschätzenden Schulkultur
(kassel university press, 2020)
Die vorliegende Arbeit setzt sich am Beispiel der Georg-Christoph-Lichtenberg-Gesamtschule Göttingen tiefergehend mit dem Begriff der „Wertschätzung“ und der möglichen Wirkungsweise eines wertschätzenden Verhaltens auseinander. Ziel dieser Arbeit ist es gewesen, die wichtigsten Bausteine einer wertschätzenden Schulkultur herauszuarbeiten und zu definieren, sie für interessierte Pädagoginnen und Pädagogen zugänglicher zu machen und konkrete Handlungsanweisungen für ein wertschätzendes Miteinander im schulischen Kontext ...
Buch
Wind Power Ensemble Forecasting
(kassel university press, 2019)
This thesis describes performance measures and ensemble architectures for deterministic and probabilistic forecasts using the application example of wind power forecasting and proposes a novel scheme for the situation-dependent aggregation of forecasting models. For performance measures, error scores for deterministic as well as probabilistic forecasts are compared, and their characteristics are shown in detail. For the evaluation of deterministic forecasts, a categorization by basic error measure and normalization ...
Buch
Sizing and operation of residential photovoltaic systems in combination with battery storage systems and heat pumps
(kassel university press, 2018)
The thriving business case of residential photovoltaic systems in combination with battery storage systems and other flexibility options, such as heat pumps, leads to additional questions for PV network integration and increases the complexity of planning processes for all involved stakeholders – especially for investors and distribution network operators. In this thesis mixed integer linear and bilevel optimization models are developed for evaluating the interdependencies between these stakeholders and their strategic ...