Browsing by Author "Eminoglu, Ulas"
Now showing items 1-11 of 11
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A Comprehensive Review and Adequacy Evaluation of Voltage Stability Indices for Modern Distribution Systems
Eminoglu, Ulas; Hocaoglu, M. Hakan; Ayasun, Saffet (PRAISE WORTHY PRIZE SRL, 2010)It is well known that the network variables and parameters contain sufficient information to obtain the most sensitive bus or line to the voltage collapse in power systems. Accordingly, there has been several static voltage ... -
Computation of Stability Delay Margin of Time-Delayed Generator Excitation Control System with a Stabilizing Transformer
Ayasun, Saffet; Eminoglu, Ulas; Sonmez, Sahin (HINDAWI PUBLISHING CORPORATION, 2014)This paper investigates the effect of time delays on the stability of a generator excitation control system compensated with a stabilizing transformer known as rate feedback stabilizer to damp out oscillations. The time ... -
Incorporation of a New Wind Turbine Generating System Model into Distribution Systems Load Flow Analysis
Eminoglu, Ulas; Dursun, Bahtiyar; Hocaoglu, M. Hakan (WILEY-BLACKWELL, 2009)This paper describes a new model for wind turbine generating systems (WTGSs) that is widely used as distributed generation sources. The model is developed by using the bi-quadratic equation, which is generally used for the ... -
Modeling and application of wind turbine generating system (WTGS) to distribution systems
Eminoglu, Ulas (PERGAMON-ELSEVIER SCIENCE LTD, 2009)This paper describes two new models for wind turbine generating systems (WTGSs), widely used as distributed generation sources in distribution systems. These models are developed by using the modifications of bi-quadratic ... -
Modeling and Design Optimization of Variable-Speed Wind Turbine Systems
Eminoglu, Ulas; Ayasun, Saffet (MDPI AG, 2014)As a result of the increase in energy demand and government subsidies, the usage of wind turbine system (WTS) has increased dramatically. Due to the higher energy production of a variable-speed WTS as compared to a fixed-speed ... -
A New Model for Output Power Calculation of Variable-Speed Wind Turbine Systems
Eminoglu, Ulas (IEEE, 2015)The evolution of power semiconductors has contributed enormously to variable-speed wind turbine systems (WTS). In this study, a new method for power output calculation of variable-speed WTSs is proposed. The model is ... -
A New Model for Wind Turbine Systems
Eminoglu, Ulas (TAYLOR & FRANCIS INC, 2009)In this article, a new model for wind turbine systems with asynchronous generator is proposed. The model is developed by using the steady-state model of an induction machine. It is validated with an experimental setup ... -
A Robust Static Voltage Stability Index for Distribution Networks
Eminoglu, Ulas (PRAISE WORTHY PRIZE SRL, 2010)In this paper, a new static voltage stability index is proposed for identifying the line or its corresponding bus on the verge of voltage collapse of distribution networks'. The index is developed by using the distribution ... -
Site-specific design optimization of horizontal-axis wind turbine systems using PSO algorithm
Eminoglu, Ulas (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2016)Due to the complexity of wind turbine systems (WTSs) containing multiple components, design parameters of a WTS must match each other in order to produce electrical energy at a lower cost and a higher efficiency. In this ... -
Three-phase transformer and voltage regulator modelling for forward/backward sweep-based distribution system power flow algorithms
Eminoglu, Ulas; Hocaoglu, M. Hakan (SAGE PUBLICATIONS LTD, 2009)This paper describes a new approach for modelling of a distribution transformer and automatic voltage regulator in forward/backward sweep-based algorithms for unbalanced radial distribution systems. For the transformer ... -
Transmission line shunt and series compensation with voltage sensitive loads
Eminoglu, Ulas; Hocaoglu, M. Hakan; Yalcinoz, Tankut (MANCHESTER UNIV PRESS, 2009)This paper presents an analysis of the effects of shunt and series line compensation levels on the transmission line voltage profile, transferred power and transmission losses for different static load models. For this ...
