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? Research Activities on MIR-FEL and table top THz Generation inKyoto University
OHGAKI, Hideaki,KII, Toshiteru,MASUDA, Kai,Arby, ABDEL AZIEM MAHMOUD Bakr,HIGASHIMURA, Keisuke,KINJO, Ryota,YOSHIDA, Kyohei,UEDA, Satoshi,SONOBE, Taro,Uk, Jeong Young Korean Physical Society 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.2
Study and Control of Photovoltaic Water Pumping System
Mohamed Arbi Khlifi 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.1
Solar photovoltaic pumping system is one of most important of renewable energy applications especially in rural areas. Besides, the control strategy for standalone solar pumping system based on induction motor and without DC/DC converter has been widely studied and discussed in the literature. This topology is of great concern due its economic issues, especially when a standard frequency converter (SFCs) with scalar control is used instead of a dedicated PV inverter. This paper proposes an external control module to generate SFCs frequency reference in order to ensure both maximum power point tracking (MPPT). We present method of modeling and control of photovoltaic pumping system based centrifugal pump controlled by new improved incremental conductance in order to optimize the price and operation of pumping system this MPPT algorithm have many advantages like can be eliminate proportional integral controller It is a low cost solution since it requires no additional power equipment. The induction motor driven pump that is powered by a solar array is controlled by the indirect field oriented control (IFOC). The effectiveness of the proposed approach is illustrated by simulations carried out under Matlab Software. The experimental results are compared with simulation results.
Study and Control of Photovoltaic Water Pumping System
Khlifi, Mohamed Arbi The Korean Institute of Electrical Engineers 2016 Journal of Electrical Engineering & Technology Vol.11 No.1
Solar photovoltaic pumping system is one of most important of renewable energy applications especially in rural areas. Besides, the control strategy for standalone solar pumping system based on induction motor and without DC/DC converter has been widely studied and discussed in the literature. This topology is of great concern due its economic issues, especially when a standard frequency converter (SFCs) with scalar control is used instead of a dedicated PV inverter. This paper proposes an external control module to generate SFCs frequency reference in order to ensure both maximum power point tracking (MPPT). We present method of modeling and control of photovoltaic pumping system based centrifugal pump controlled by new improved incremental conductance in order to optimize the price and operation of pumping system this MPPT algorithm have many advantages like can be eliminate proportional integral controller It is a low cost solution since it requires no additional power equipment. The induction motor driven pump that is powered by a solar array is controlled by the indirect field oriented control (IFOC). The effectiveness of the proposed approach is illustrated by simulations carried out under Matlab Software. The experimental results are compared with simulation results.
Modeling of a Dual Stator Induction Generator with and Without Cross Magnetic Saturation
Marwa Ben Slimene,Mohamed Arbi Khlifi,Mouldi Ben Fredj,Habib Rehaoulia 한국자기학회 2015 Journal of Magnetics Vol.20 No.3
This paper discusses general methods of modelling magnetic saturation in steady-state, two-axis (d & q) frame models of dual stator induction generators (DSIG). In particular, the important role of the magnetic coupling between the d-q axes (cross-magnetizing phenomenon) is demonstrated, with and without cross-saturation. For that purpose, two distinct models of DSIGs, with and without cross-saturation, are specified. These two models are verified by an application that is sensitive to the presence of cross-saturation, to prove the validity of these final methods and the equivalence between all developed models. Advantages of some of the models over the existing ones and their applicability are discussed. In addition, an alternative is given to evaluate all saturation factors (static and dynamic) by just calculating the static magnetizing inductance which is simply the magnitude of the ratio of the magnetizing flux to the current. The comparison between the simulation results of the proposed model with experimental results gives a good correspondence, especially at startup.
Performance Limits of Three-Phase Self-Excited Induction Generator (SEIG) as a Stand Alone DER
Marwa Ben Slimene,Mohamed Arbi Khlifi 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.1
This paper present a unified method of steady state performance analysis and limits characteristics of an autonomous three-phase self-excited induction generator (SEIG) driven by a wind turbine under different types of loads and speeds. The proposed method is based on a new mathematical function to solve for the real and imaginary components of the complex equation of the mathematical model. Performances limits, regulation and characteristics of different configurations will be thoroughly examined and compared. The proposed system will be modeled and simulated and the performance limits characteristics will be compared with variable speed and variable capacity.
Performance Limits of Three-Phase Self-Excited Induction Generator (SEIG) as a Stand Alone DER
Slimene, Marwa Ben,Khlifi, Mohamed Arbi The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.1
This paper present a unified method of steady state performance analysis and limits characteristics of an autonomous three-phase self-excited induction generator (SEIG) driven by a wind turbine under different types of loads and speeds. The proposed method is based on a new mathematical function to solve for the real and imaginary components of the complex equation of the mathematical model. Performances limits, regulation and characteristics of different configurations will be thoroughly examined and compared. The proposed system will be modeled and simulated and the performance limits characteristics will be compared with variable speed and variable capacity.
Marwa Ben Slimene,Abdelaziz Salah Saidi,Mohamed Arbi Khlifi 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1
The present paper deals with a simple but suffi ciently accurate method for constant parameter identifi cation of synchronous machine standard circuit model. The method is mainly based on classical tests at the line frequency as for induction machines. The proposed identifi cation process is organized in a sequence beginning by a correct evaluation of the fi eld to armature turns ratio, whereby the rest of invariant parameters are estimated from standstill tests. Simulations and experiments of synchronous machine transients, in normal and faulty operations, were carried out to prove the validity of the method.