This paper outlines critical steps to be taken during design of a wind power generation and utili... more This paper outlines critical steps to be taken during design of a wind power generation and utility interfacing system. These steps include determining generator open circuit voltage, utility and DC bus voltages, determining topologies for rectifiers and inverters, examining power control strategies, sizing active and passive components in the entire system.
This paper introduces design and analysis performed for a dual winding electric machine that oper... more This paper introduces design and analysis performed for a dual winding electric machine that operates both motor and generator mode. The proposed structure could be a considerable choice for multitasking operation and fault tolerant applications. Motor and generator windings of the electric machine are located on the same stator core. Windings are concentrated type so that electrical and magnetic isolation is maintained. With the proposed technique, simultaneous motoring and generating operations can be implemented in the single housing of electric machine. This structure provides low volume, low mass and low inertia for industrial applications. It also provides economical benefit compared to using separate motor and generator. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results are discussed.
This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine
elect... more This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine electrical components during normal and unbalanced fault condition. Wind turbine components are individually modeled and then combined in a simulation process which is called coupled simulation. The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents. Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor currents are very sensitive to the grid fault voltage level.
2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013
ABSTRACT Batteries are one of the key components for Electric Vehicles (EVs). While batteries sup... more ABSTRACT Batteries are one of the key components for Electric Vehicles (EVs). While batteries supply energy to output at normal working mode by converting internal chemical energy to electric energy (discharging), they restore energy at regenerative working mode as opposed to discharging (charging). During each working mode, battery current is not smooth DC and it has ripple. The ripple current influence battery lifetime negatively. Simulations which include ideal battery model and ideal DC bus capacitor model do not give realistic results about battery ripple current. This paper presents comparative investigations and evaluations about battery current waveform, battery current harmonic spectrum and the ratio of battery current harmonic components to battery average current for different modulation methods and operating states for motor (i.e. speed and torque) by using high frequency battery model and high frequency DC bus capacitor model.
Dept of Electrical Eng. Vocational Sch. of High Tech. Technical Education Faculty 80750, Istanbul... more Dept of Electrical Eng. Vocational Sch. of High Tech. Technical Education Faculty 80750, Istanbul, Turkey 34850, Istanbul, Turkey. 41 000, Kocaeli, Turkey. ... Abstract Torque ripple is a drawback for both conventional and hlly pitched SRM structures. Although there are ...
Abstract Producing the required magnitude and shape of reference current is necessary to achieve ... more Abstract Producing the required magnitude and shape of reference current is necessary to achieve precise torque control in motor control applications. A deadbeat predictive current controller provides very good dynamic performance. In order to achieve very accurate ...
This paper outlines critical steps to be taken during design of a wind power generation and utili... more This paper outlines critical steps to be taken during design of a wind power generation and utility interfacing system. These steps include determining generator open circuit voltage, utility and DC bus voltages, determining topologies for rectifiers and inverters, examining power control strategies, sizing active and passive components in the entire system.
This paper introduces design and analysis performed for a dual winding electric machine that oper... more This paper introduces design and analysis performed for a dual winding electric machine that operates both motor and generator mode. The proposed structure could be a considerable choice for multitasking operation and fault tolerant applications. Motor and generator windings of the electric machine are located on the same stator core. Windings are concentrated type so that electrical and magnetic isolation is maintained. With the proposed technique, simultaneous motoring and generating operations can be implemented in the single housing of electric machine. This structure provides low volume, low mass and low inertia for industrial applications. It also provides economical benefit compared to using separate motor and generator. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results are discussed.
This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine
elect... more This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine electrical components during normal and unbalanced fault condition. Wind turbine components are individually modeled and then combined in a simulation process which is called coupled simulation. The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents. Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor currents are very sensitive to the grid fault voltage level.
2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013
ABSTRACT Batteries are one of the key components for Electric Vehicles (EVs). While batteries sup... more ABSTRACT Batteries are one of the key components for Electric Vehicles (EVs). While batteries supply energy to output at normal working mode by converting internal chemical energy to electric energy (discharging), they restore energy at regenerative working mode as opposed to discharging (charging). During each working mode, battery current is not smooth DC and it has ripple. The ripple current influence battery lifetime negatively. Simulations which include ideal battery model and ideal DC bus capacitor model do not give realistic results about battery ripple current. This paper presents comparative investigations and evaluations about battery current waveform, battery current harmonic spectrum and the ratio of battery current harmonic components to battery average current for different modulation methods and operating states for motor (i.e. speed and torque) by using high frequency battery model and high frequency DC bus capacitor model.
Dept of Electrical Eng. Vocational Sch. of High Tech. Technical Education Faculty 80750, Istanbul... more Dept of Electrical Eng. Vocational Sch. of High Tech. Technical Education Faculty 80750, Istanbul, Turkey 34850, Istanbul, Turkey. 41 000, Kocaeli, Turkey. ... Abstract Torque ripple is a drawback for both conventional and hlly pitched SRM structures. Although there are ...
Abstract Producing the required magnitude and shape of reference current is necessary to achieve ... more Abstract Producing the required magnitude and shape of reference current is necessary to achieve precise torque control in motor control applications. A deadbeat predictive current controller provides very good dynamic performance. In order to achieve very accurate ...
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Papers by Erkan MeŞe
electrical components during normal and unbalanced fault condition. Wind turbine components are
individually modeled and then combined in a simulation process which is called coupled simulation.
The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one
phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents.
Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor
currents are very sensitive to the grid fault voltage level.
electrical components during normal and unbalanced fault condition. Wind turbine components are
individually modeled and then combined in a simulation process which is called coupled simulation.
The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one
phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents.
Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor
currents are very sensitive to the grid fault voltage level.