The Experts below are selected from a list of 8739 Experts worldwide ranked by ideXlab platform
Jawad Faiz - One of the best experts on this subject based on the ideXlab platform.
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solid state Tap Changer of transformers design control and implementation
International Journal of Electrical Power & Energy Systems, 2011Co-Authors: Jawad Faiz, Behzad SiahkolahAbstract:This paper presents the implementation of a prototype electronic Tap-Changer of transformer. Mechanical Tap-Changer has many problems such as low operating speed, short lifetime and heavy size. In order to solve these problems a fully solid-state Tap-Changer with a new control strategy and optimal configuration is proposed. The design of Tap-Changer is discussed and bi-directional solid-state power electronics switches are implemented. Following the realization of the Tap-Changer controller, developed software for such precise control is introduced. To verify the design procedure and optimal configuration and apply the developed software, a prototype low-power Tap-Changer has been built and tested.
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Design of Taps Winding Structure and Configuration of Switches in Full-Electronic Tap-Changer
Power Systems, 2011Co-Authors: Jawad Faiz, Behzad SiahkolahAbstract:Full-electronic Tap-Changer is faster, has better performance, more capabilities and lower maintenance costs compared with mechanical Tap-Changers and hybrid Tap-Changers; however, the cost of electronic Tap-Changers is higher than that of the conventional ones.
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Implementation of a low-power electronic Tap-Changer in transformers
Iet Electric Power Applications, 2008Co-Authors: Jawad Faiz, B. SiahkolahAbstract:The criteria for optimal configuration of transformer windings as well as power electronics switches are proposed for the design and implementation of a low-power electronics Tap-Changer. The aims of this optimisation include minimisation of: 1) number of switches and their voltages and currents, 2) number of Taps in the transformer, 3) deviation of the amplitude of voltage compared with the reference voltage in the regulation bus and finally increasing number of voltage steps. The hardware for designing and manufacturing a prototype electronic Tap-Changer is described. The test results for this prototype are presented which shows the advantages of the proposed Tap-Changer over a mechanical Tap-Changer.
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New Controller for an Electronic Tap Changer—Part I: Design Procedure and Simulation Results
IEEE Transactions on Power Delivery, 2007Co-Authors: Jawad Faiz, B. SiahkolahAbstract:Controller of a conventional Tap Changer must be modified when an electronic Tap Changer is used. A new controller design is generally preferred for an electronic Tap Changer in order to take full advantage of the Tap Changer. The first part of this two-part paper presents a systematic design procedure for the controller of an electronic Tap Changer. Performance of a Tap Changer equipped with the designed controller is simulated
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New solid-state onload Tap-Changers topology for distribution transformers
IEEE Transactions on Power Delivery, 2003Co-Authors: Jawad Faiz, B. SiahkolahAbstract:High controllability advantages of power electronic switches lead to their application in the Tap-Changer of distribution transformers. Using such switches leads to quick operation of the Tap-Changer and, thus, improved performance. Moreover, their application reduces maintenance and repair costs of Tap-Changers. This paper introduces a new solid-state onload Tap-Changer topology that has many steps with fewer power electronic switches compared with those reported in the literature. This Tap-Changer is designed for an 800-kVA, 20-kV/400-V distribution transformer, and the results are discussed.
B. Siahkolah - One of the best experts on this subject based on the ideXlab platform.
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Implementation of a low-power electronic Tap-Changer in transformers
Iet Electric Power Applications, 2008Co-Authors: Jawad Faiz, B. SiahkolahAbstract:The criteria for optimal configuration of transformer windings as well as power electronics switches are proposed for the design and implementation of a low-power electronics Tap-Changer. The aims of this optimisation include minimisation of: 1) number of switches and their voltages and currents, 2) number of Taps in the transformer, 3) deviation of the amplitude of voltage compared with the reference voltage in the regulation bus and finally increasing number of voltage steps. The hardware for designing and manufacturing a prototype electronic Tap-Changer is described. The test results for this prototype are presented which shows the advantages of the proposed Tap-Changer over a mechanical Tap-Changer.
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New Controller for an Electronic Tap Changer—Part I: Design Procedure and Simulation Results
IEEE Transactions on Power Delivery, 2007Co-Authors: Jawad Faiz, B. SiahkolahAbstract:Controller of a conventional Tap Changer must be modified when an electronic Tap Changer is used. A new controller design is generally preferred for an electronic Tap Changer in order to take full advantage of the Tap Changer. The first part of this two-part paper presents a systematic design procedure for the controller of an electronic Tap Changer. Performance of a Tap Changer equipped with the designed controller is simulated
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New solid-state onload Tap-Changers topology for distribution transformers
IEEE Transactions on Power Delivery, 2003Co-Authors: Jawad Faiz, B. SiahkolahAbstract:High controllability advantages of power electronic switches lead to their application in the Tap-Changer of distribution transformers. Using such switches leads to quick operation of the Tap-Changer and, thus, improved performance. Moreover, their application reduces maintenance and repair costs of Tap-Changers. This paper introduces a new solid-state onload Tap-Changer topology that has many steps with fewer power electronic switches compared with those reported in the literature. This Tap-Changer is designed for an 800-kVA, 20-kV/400-V distribution transformer, and the results are discussed.
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New Solid-State on-Load Tap-Changer Topology for Distribution Transformers
IEEE Power & Energy Magazine, 2002Co-Authors: Jawad Faiz, B. SiahkolahAbstract:High controllability advantages of power electronic switches led to their application in Tap-Changers of distribution transformers. Using such switches lends itself to quick operation of the Tap-Changer and thus improved performance. Their application reduces maintenance and repair costs of Tap-Changers. This paper introduces a new solid-state on-load Tap-Changer topology that has many steps with fewer power electronic switches compared to those reported in the literature. This Tap-Changer is designed for an 800 kVA, 20 kV/400 V distribution transformer, and the results are discussed.
Behzad Siahkolah - One of the best experts on this subject based on the ideXlab platform.
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solid state Tap Changer of transformers design control and implementation
International Journal of Electrical Power & Energy Systems, 2011Co-Authors: Jawad Faiz, Behzad SiahkolahAbstract:This paper presents the implementation of a prototype electronic Tap-Changer of transformer. Mechanical Tap-Changer has many problems such as low operating speed, short lifetime and heavy size. In order to solve these problems a fully solid-state Tap-Changer with a new control strategy and optimal configuration is proposed. The design of Tap-Changer is discussed and bi-directional solid-state power electronics switches are implemented. Following the realization of the Tap-Changer controller, developed software for such precise control is introduced. To verify the design procedure and optimal configuration and apply the developed software, a prototype low-power Tap-Changer has been built and tested.
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Design of Taps Winding Structure and Configuration of Switches in Full-Electronic Tap-Changer
Power Systems, 2011Co-Authors: Jawad Faiz, Behzad SiahkolahAbstract:Full-electronic Tap-Changer is faster, has better performance, more capabilities and lower maintenance costs compared with mechanical Tap-Changers and hybrid Tap-Changers; however, the cost of electronic Tap-Changers is higher than that of the conventional ones.
Hui Li - One of the best experts on this subject based on the ideXlab platform.
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coordinated control of distributed energy storage system with Tap Changer transformers for voltage rise mitigation under high photovoltaic penetration
IEEE Transactions on Smart Grid, 2012Co-Authors: Xiaohu Liu, A Aichhorn, Liming Liu, Hui LiAbstract:This paper proposes a coordinated control of distributed energy storage system (ESS) with traditional voltage regulators including the on-load Tap Changer transformers (OLTC) and step voltage regulators (SVR) to solve the voltage rise problem caused by the high photovoltaic (PV) penetration in the low-voltage distribution network. The main objective of this coordinated control is to relieve the Tap Changer transformer operation stress, shave the distribution network peak load and decrease the transmission and distribution resistive power losses under high solar power penetration. The proposed control method limits the energy storage depth of discharge in order to meet a more than ten-year cycle life. A benchmark distribution network model was developed in the Real Time Digital Simulator (RTDS) and the simulation results from the studied cases verified the proposed coordinated control strategy. The experimental implementation of proposed control algorithms were developed based on a power hardware-in-the-loop (PHIL) test bed with a 22 kWh ESS, a smart meter, Labview controller, and RTDS. The experimental results were consistent with those obtained from simulation study.
Roberto Turri - One of the best experts on this subject based on the ideXlab platform.
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voltage management strategies for low voltage networks supplied through phase decoupled on load Tap Changer transformers
AEIT International Annual Conference, 2017Co-Authors: A Bettanin, Massimiliano Coppo, Andrea Savio, Roberto TurriAbstract:As the penetration of small scale generators increases in distribution networks, the controllability of these systems, especially at Low Voltage (LV) level, is becoming more and more important. Several research studies proposed the adoption of the On-Load-Tap-Changer at the Secondary Substation transformer to enhance the voltage control, thus several commercial products are now available. This paper investigates how this technology may influence the voltage management in LV networks, taking into account the possible voltage unbalance deriving from uneven distribution of loads and generators on the three phases and the reactive power provision by the latter. Several scenarios regarding the voltage control are applied to a case study network to simulate different Tap changing controls and voltage monitoring strategies.
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voltage control for unbalanced low voltage grids using a decoupled phase on load Tap Changer transformer and photovoltaic inverters
International Universities Power Engineering Conference, 2015Co-Authors: Antonio Zecchino, Massimiliano Coppo, Mattia Marinelli, Junjie Hu, Roberto TurriAbstract:This paper presents modeling and analysis of the potential benefits of joint actions of a MV/LV three-phase power distribution transformer with independent on-load Tap-Changer control on each phase and photovoltaic inverters provided with reactive power control capability, in terms of accommodating more renewable generations in the LV grid. The potential benefits are investigated in terms of voltage unbalance reduction and local voltage regulation. 24-hours root-mean-square dynamics simulation studies have been carried out with time-step of 1 second using 10-mins resolution consumption and production profiles. A totally passive real Danish low voltage distribution network is used for the grid topology as well as for the characterization of loads profiles, while the production ones are empirically defined under assumptions in scenarios with different level of photovoltaic penetration and grade of unbalance.
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voltage management in unbalanced low voltage networks using a decoupled phase Tap Changer transformer
International Universities Power Engineering Conference, 2014Co-Authors: Massimiliano Coppo, Roberto Turri, Mattia MarinelliAbstract:The paper studies a medium voltage-low voltage transformer with a decoupled on load Tap Changer capability on each phase. The overall objective is the evaluation of the potential benefits on a low voltage network of such possibility. A realistic Danish low voltage network is used for the analysis. The load profiles are characterized by using single phase measurement data on voltages, currents and active powers with a 10 minutes resolution. Different scenarios are considered: no Tap action, three-phase coordinated Tap action, single phase discrete step and single phase continuous Tap action. The effectiveness of the Tapping capability is evaluated by comparing the Voltage Unbalance Factor and the voltage levels on the neutral cable.
