TY - CHAP A1 - Kreplin, Sarina A1 - Höhn, Sebastian A1 - Semerow, Anatoli A1 - Luther, Matthias T1 - Generator modeling in the context of small-signal stability T2 - 2016 IEEE Power and Energy Society General Meeting N2 - Modal analysis is the well-established method for investigating small-signal stability. Dominant states of a particular oscillatory or monotonous mode can be identified by linearizing the system's differential equations. Since generator oscillation is predominantly influenced by the speed deviation and the rotor angle, whereas other state variables play a minor role, an approach to reduce a generator's state matrix to a lower order is presented in this paper. Fundamental, analytical investigations concerning generator modeling of synchronous generators connected to an infinite bus ensure the correct reproduction of the generator's electromechanical behavior without losing accuracy compared to higher-order models. Y1 - 2016 U6 - https://doi.org/10.1109/pesgm.2016.7741598 SN - 1944-9933 ER - TY - CHAP A1 - Semerow, Anatoli A1 - Höhn, Sebastian A1 - Bauer, Benedikt A1 - Luther, Matthias T1 - An innovative method to develop power system equivalents with focus on inter-area oscillations and primary control representation T2 - 2015 IEEE Eindhoven PowerTech N2 - An innovative method to develop power system equivalents is presented in this paper. The purpose is the representation of system inertia, inter-area oscillations and primary control of large interconnected power systems by means of publicly available information. The approach to reach this target is based on a systematically developed load-flow model and the representation of system dynamics by means of standard dynamic models for generation units, their appropriate control and loads. The initial parameters of the standard dynamic models are tuned with regard to frequency measurements and published power system characteristics. The developed method allows general analysis of extensive influences on the dynamic behavior of a particular power system. Conceivable applications of the developed method are proposed for further system analysis. Finally an employment of the method is shown for the Continental Europe synchronous area (CESA). Y1 - 2015 U6 - https://doi.org/10.1109/PTC.2015.7232581 PB - IEEE Computer Society Press ER - TY - JOUR A1 - Höhn, Sebastian A1 - Semerow, Anatoli A1 - Luther, Matthias T1 - Comparison of transmission technologies with regard to their contribution to power system stability JF - Renewable Energy and Power Quality Journal N2 - The amount of power to be transmitted is increasing worldwide. Hence, a considerable number of bulk power transmission projects are going to be realized (e.g. [1]). Taking into account the recent technical development, three technologies are available for bulk power transmission: Direct current applications with voltage sourced or line commutated converters as well as the high-voltage AC technology up to 1200 kV. To select the most suitable technology for a particular project is often anything but trivial for the transmission system operator. Amongst other criteria, the influence on the electromechanical behavior of the power system is a decisive factor for network improvements that should be considered within the decision-making process. This paper aims at categorizing and analyzing this rather abstract term as a major criterion. The goal is to provide an indication, which factors are needed to be evaluated in advance of the well-considered choice. For that reason, several categories are introduced and thoroughly investigated within the scope of a theoretical approach. Where reasonable, simulation results are presented in order to enable the practical assessment of the impact on the electromechanical system behavior. As a conclusion, it is recommended to perform concise ex-ante studies with regard to the electromechanical dynamics as a decision-making basis to identify the most suitable transmission technology for a particular project. © 2015, European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ). Y1 - 2015 U6 - https://doi.org/10.24084/repqj13.318 SN - 2172-038X VL - 1 IS - 13 SP - 327 EP - 332 PB - European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ) ER - TY - CHAP A1 - Semerow, Anatoli A1 - Höhn, Sebastian A1 - Luther, Matthias A1 - Sattinger, Walter A1 - Abildgaard, Hans A1 - Garcia, Agustin Diaz A1 - Giannuzzi, Giorgio T1 - Dynamic Study Model for the interconnected power system of Continental Europe in different simulation tools T2 - 2015 IEEE Eindhoven PowerTech N2 - This paper describes the development process of the Dynamic Study Model (DSM) for the synchronously interconnected power system of Continental Europe in different simulation tools 1 . The model was developed by the European Network of Transmission System Operators for Electricity (ENTSO-E) working group System Protection and Dynamics 2 and the University of Erlangen-Nuremberg within a collaboration. The paper describes the DSM scope, input and necessary steps towards an adequate basis for the novel dynamic data enhancement process by means of standard dynamic models for generation units and allocation criteria. Through a parameter variation process the DSM has been successively tuned to match a frequency measurement of a system event with respect to system inertia, frequency containment reserve and one of the typical oscillation modes within Continental Europe. Finally, the DSM behavior has been verified by means of previous experience from operation. Y1 - 2015 SN - 978-1-4799-7693-5 U6 - https://doi.org/10.1109/PTC.2015.7232578 PB - IEEE Computer Society Press ER - TY - JOUR A1 - Höhn, Sebastian A1 - Semerow, Anatoli A1 - Luther, Matthias T1 - A comprehensive approach to classify reactive power consumption in transmission technologies JF - Renewable Energy and Power Quality Journal N2 - Reactive power consumption is an essential feature of any electrical equipment applied in electrical power systems. To accomplish its main task, i.e. the transfer of active power, an electrical device interacts with the system it is connected to. A common aim is to reduce the reactive power flow on the terminals of the equipment to a minimum. Therefore it’s necessary to compensate the reactive power consumption by means of adequate measures. This can’t be reached without precise investigation on the sources of reactive power emergence. This paper investigates the physical phenomena underlying the reactive power behavior of HVAC and HVDC transmission technologies. After having introduced a common mathematical definition of active, apparent and reactive power, reactive power is categorized and the concept is applied to analyze the aforementioned technologies. © 2013, European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ). Y1 - 2013 U6 - https://doi.org/10.24084/repqj11.351 SN - 2172-038X VL - 1 IS - 11 SP - 501 EP - 506 PB - European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ) ER -