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Shady Abdel H E Aleem - One of the best experts on this subject based on the ideXlab platform.
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practical considerations for reactive power sharing approaches among multiple arm Passive Filters in non sinusoidal power systems
International Journal of Electrical Power & Energy Systems, 2018Co-Authors: Faisal Q Alenezi, Ziad M Ali, Sameh S Kandil, Shady Abdel H E AleemAbstract:Abstract Shunt Passive Filters are considered as the most reliable and economical tool for power factor improvement and harmonic suppression. Many mathematical techniques have been developed in the literature for reactive power division among multiple Passive filter arms, taking into consideration different techno-economic aspects. In this paper, firstly, a comprehensive overview of all reactive power-sharing approaches among multiple-arm Passive Filters was presented. The eight presented approaches cover all of the former and recent industrial and research methods. Secondly, this article presented a new method of multiple-arm Passive filter design based on the crow search algorithm (CSA) to minimize the total harmonic current distortion (THDI) as an objective function for an industrial plant. The simulated system was modeled through Matlab and the results are compared with eight conventional techniques with respect to the technical aspects such as filter efficiency, harmonic distortion levels, filter failure, interaction with the system, and filter cost to determine the most efficient design technique. Simulations are carried out in ETAP and Matlab environments. The simulation results obtained show the disadvantages of the traditional design methods and the advantage of the proposed solution among the other methods.
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effective utilization of cables and transformers using Passive Filters for non linear loads
International Journal of Electrical Power & Energy Systems, 2015Co-Authors: Shady Abdel H E Aleem, M. E. Balci, Selcuk SakarAbstract:Abstract In the literature, it is well known that transformers and cables have excessive losses or overheating under non-sinusoidal current conditions. Accordingly, they have reduced current carrying capabilities (or loading capabilities) for that kind of conditions. This paper aims to employ Passive Filters for the effective utilization of the cables and transformers in the non-sinusoidal systems. Consequently, an optimal Passive filter design approach is provided to maximize the power factor expression, which takes into account frequency-dependent line losses, under non-sinusoidal background voltage and line current conditions. The individual and total harmonic distortion limits placed in IEEE standard 519 are taken into account as constraints for the proposed approach. Besides, keeping the load’s displacement power factor at an adequate range is desired by the proposed approach. The proposed approach and the traditional optimal Passive filter design approach, which aims to maximize the classical power factor expression, are comparatively evaluated for an industrial power system with a group of linear and non-linear loads, overhead transmission lines, cables and a transformer. Numerical results show that the proposed one has a considerable advantage in the improvement of the total supply line loss and the transformer’s loading capability under non-sinusoidal conditions when compared to the traditional one. On the other hand, for the simulated system cases, both approaches lead to almost the same current carrying capability value of the cables.
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optimal design of single tuned Passive Filters using response surface methodology
2015 International School on Nonsinusoidal Currents and Compensation (ISNCC), 2015Co-Authors: Selcuk Sakar, Aslan Deniz Karaoglan, M. E. Balci, Shady Abdel H E Aleem, Ahmed F. ZobaaAbstract:This paper presents an approach based on Response Surface Methodology (RSM) to find the optimal parameters of the single-tuned Passive Filters for harmonic mitigation. The main advantages of RSM can be underlined as easy implementation and effective computation. Using RSM, the single-tuned harmonic filter is designed to minimize voltage total harmonic distortion (THDV) and current total harmonic distortion (THDI). Power factor (PF) is also incorporated in the design procedure as a constraint. To show the validity of the proposed approach, RSM and Classical Direct Search (Grid Search) methods are evaluated for a typical industrial power system.
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optimal c type Passive filter based on minimization of the voltage harmonic distortion for nonlinear loads
IEEE Transactions on Industrial Electronics, 2012Co-Authors: Shady Abdel H E Aleem, A F Zobaa, M M A AzizAbstract:In its broadest sense, Passive Filters have been a very potent technique for power system harmonic suppression because of their possible different frequency response characteristics that can achieve a certain required harmonic filtering target, also due to their simplicity and economical cost. This paper presents an application of FORTRAN feasible sequential quadratic programming to find the optimal sizing of parameters of C-type Passive Filters for minimizing the total voltage harmonic distortion of nonlinear loads, where maintaining a given power factor at a specified range is desired. The optimal design of the C-type Passive filter as an alternative to the conventional Passive filtering techniques is introduced, and a detailed comparison of the results between an uncompensated system and a C-type filter are discussed by means of different numerical examples, considering source and load nonlinearities, while taking into account compliance with the IEEE standards 519-1992 and 18-2002.
M. E. Balci - One of the best experts on this subject based on the ideXlab platform.
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effective utilization of cables and transformers using Passive Filters for non linear loads
International Journal of Electrical Power & Energy Systems, 2015Co-Authors: Shady Abdel H E Aleem, M. E. Balci, Selcuk SakarAbstract:Abstract In the literature, it is well known that transformers and cables have excessive losses or overheating under non-sinusoidal current conditions. Accordingly, they have reduced current carrying capabilities (or loading capabilities) for that kind of conditions. This paper aims to employ Passive Filters for the effective utilization of the cables and transformers in the non-sinusoidal systems. Consequently, an optimal Passive filter design approach is provided to maximize the power factor expression, which takes into account frequency-dependent line losses, under non-sinusoidal background voltage and line current conditions. The individual and total harmonic distortion limits placed in IEEE standard 519 are taken into account as constraints for the proposed approach. Besides, keeping the load’s displacement power factor at an adequate range is desired by the proposed approach. The proposed approach and the traditional optimal Passive filter design approach, which aims to maximize the classical power factor expression, are comparatively evaluated for an industrial power system with a group of linear and non-linear loads, overhead transmission lines, cables and a transformer. Numerical results show that the proposed one has a considerable advantage in the improvement of the total supply line loss and the transformer’s loading capability under non-sinusoidal conditions when compared to the traditional one. On the other hand, for the simulated system cases, both approaches lead to almost the same current carrying capability value of the cables.
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optimal design of single tuned Passive Filters using response surface methodology
2015 International School on Nonsinusoidal Currents and Compensation (ISNCC), 2015Co-Authors: Selcuk Sakar, Aslan Deniz Karaoglan, M. E. Balci, Shady Abdel H E Aleem, Ahmed F. ZobaaAbstract:This paper presents an approach based on Response Surface Methodology (RSM) to find the optimal parameters of the single-tuned Passive Filters for harmonic mitigation. The main advantages of RSM can be underlined as easy implementation and effective computation. Using RSM, the single-tuned harmonic filter is designed to minimize voltage total harmonic distortion (THDV) and current total harmonic distortion (THDI). Power factor (PF) is also incorporated in the design procedure as a constraint. To show the validity of the proposed approach, RSM and Classical Direct Search (Grid Search) methods are evaluated for a typical industrial power system.
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Optimal Design of C-type Passive Filters Based on Response Surface Methodology for Typical Industrial Power Systems
Electric Power Components and Systems, 2013Co-Authors: M. E. Balci, Aslan Deniz KaraoglanAbstract:Abstract In this article, a response surface methodology based approach is proposed for the optimal design of C-type Passive Filters that can be employed in typical industrial power systems. The purpose of the optimization process is to minimize voltage and current total harmonic distortions. According to IEEE Standard 519-1992, both indices and displacement power factor are handled as constraints for the optimal filter design problem. To show the validity of the proposed approach, numerical results are presented.
Selcuk Sakar - One of the best experts on this subject based on the ideXlab platform.
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effective utilization of cables and transformers using Passive Filters for non linear loads
International Journal of Electrical Power & Energy Systems, 2015Co-Authors: Shady Abdel H E Aleem, M. E. Balci, Selcuk SakarAbstract:Abstract In the literature, it is well known that transformers and cables have excessive losses or overheating under non-sinusoidal current conditions. Accordingly, they have reduced current carrying capabilities (or loading capabilities) for that kind of conditions. This paper aims to employ Passive Filters for the effective utilization of the cables and transformers in the non-sinusoidal systems. Consequently, an optimal Passive filter design approach is provided to maximize the power factor expression, which takes into account frequency-dependent line losses, under non-sinusoidal background voltage and line current conditions. The individual and total harmonic distortion limits placed in IEEE standard 519 are taken into account as constraints for the proposed approach. Besides, keeping the load’s displacement power factor at an adequate range is desired by the proposed approach. The proposed approach and the traditional optimal Passive filter design approach, which aims to maximize the classical power factor expression, are comparatively evaluated for an industrial power system with a group of linear and non-linear loads, overhead transmission lines, cables and a transformer. Numerical results show that the proposed one has a considerable advantage in the improvement of the total supply line loss and the transformer’s loading capability under non-sinusoidal conditions when compared to the traditional one. On the other hand, for the simulated system cases, both approaches lead to almost the same current carrying capability value of the cables.
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optimal design of single tuned Passive Filters using response surface methodology
2015 International School on Nonsinusoidal Currents and Compensation (ISNCC), 2015Co-Authors: Selcuk Sakar, Aslan Deniz Karaoglan, M. E. Balci, Shady Abdel H E Aleem, Ahmed F. ZobaaAbstract:This paper presents an approach based on Response Surface Methodology (RSM) to find the optimal parameters of the single-tuned Passive Filters for harmonic mitigation. The main advantages of RSM can be underlined as easy implementation and effective computation. Using RSM, the single-tuned harmonic filter is designed to minimize voltage total harmonic distortion (THDV) and current total harmonic distortion (THDI). Power factor (PF) is also incorporated in the design procedure as a constraint. To show the validity of the proposed approach, RSM and Classical Direct Search (Grid Search) methods are evaluated for a typical industrial power system.
T.c. Goras - One of the best experts on this subject based on the ideXlab platform.
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Hybrid Rectifier With Near-Sinusoidal Input Currents
IEEE Transactions on Industrial Electronics, 2012Co-Authors: D. Alexa, Adriana Sirbu, I.v. Pletea, T.c. GorasAbstract:This paper presents a new hybrid rectifier with near-sinusoidal input currents (RNSIC) converter which increases the performances of classic RNSIC converters. The proposed solution is technically and economically competitive with three-phase diode rectifiers with Passive Filters. Simulation and experimental results from a laboratory prototype are shown to confirm the validity of the proposed converter.
Hirofumi Akagi - One of the best experts on this subject based on the ideXlab platform.
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Control and performance of a self-commutated GTO converter operating in parallel with line-commutated thyristor converters
IEEE Transactions on Industrial Electronics, 2004Co-Authors: S. Tamai, S. Murakami, R. Uchida, Hirofumi AkagiAbstract:Recently, static var generators (SVGs) or static synchronous compensators based on self-commutated converters have been put into practical use for the purpose of compensation for reactive power, power swings damping, and/or voltage control in power systems. The SVGs have also been applied to reduce voltage fluctuations appearing at high-speed train substations. When parallel resonance occurs between Passive Filters installed at a point of common coupling (PCC) and the power-system impedance existing upstream of the PCC, voltage/current harmonics are significantly amplified in the power system. This paper describes the control and performance for a self-commutated gate-turn-off (GTO) converter operating in parallel with conventional line-commutated thyristor converters. This hybrid power conversion system rated at more than dozens of MVA has an inductive load at the dc side. A bank of Passive Filters is connected not only for harmonic compensation of the line-commutated converters, but also as a constant leading reactive-power source. The GTO converter can control either leading or lagging reactive power so as to achieve unity power factor operation. In addition, it has the capability of damping out parallel resonance between the Passive Filters and the power-system impedance. This paper confirms the viability and effectiveness of the hybrid system by means of theory and computer simulation.
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A new combined system of active and Passive Filters to obtain harmonic compensation for large-capacity thyristor converters
Electrical Engineering in Japan, 1992Co-Authors: Toshihiko Tanaka, Hirofumi AkagiAbstract:Shunt Passive Filters, which are connected in parallel to harmonic-producing loads, have been used widely for harmonics suppression in power systems because of low cost and high efficiency. However, they have such inherent problems as series and parallel resonance. On the other hand, shunt active Filters, which are also placed in parallel, have such an inherent problem as initial and running costs are high compared with those of shunt Passive Filters. To solve these inherent problems in shunt Passive and shunt active Filters, the authors have proposed a combined system of a shunt Passive filter and a small rated series-active filter. The purpose of this paper is to reduce the required rating of the series-active filter, considering a practical application of the combined power filter to harmonic compensation for large-capacity thyristor converters. The points are summarized as follows: 1 The required rating of the series-active filter can be reduced less than one-tenth by connecting a series-resonant circuit in parallel to the secondary of current transformer. 2 It is clarified theoretically and verified experimentally that compensation characteristics of the new combined system are equivalent to those of the already-proposed system with no series-resonant circuit.
