The Experts below are selected from a list of 3798 Experts worldwide ranked by ideXlab platform
Magdy M. A. Salama - One of the best experts on this subject based on the ideXlab platform.
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Advanced Techniques for Voltage Flicker Mitigation
2006 IEEE International Power Electronics Congress, 2006Co-Authors: Mostafa I. Marei, Magdy M. A. SalamaAbstract:This paper presents advanced techniques to mitigate the Voltage Flicker using inverter based power conditioners. A new control strategy to mitigate the Voltage fluctuations, employing the envelope tracking techniques is presented. This control algorithm is appropriate to drive the Distribution STATic COMpensator (DSTATCOM) to mitigate Voltage fluctuations and to regulate the Point of Common Coupling (PCC) Voltage. The envelope tracking based control technique has some difficulties in the compensation of unbalanced Voltage disturbances. In order to overcome this limitation, another control strategy, based on symmetrical components estimation techniques is introduced in this paper. This strategy is based on compensating both the negative and zero sequences and boosting the positive sequence by using the Dynamic Voltage Restorer (DVR). This action results in compensating Voltage Flicker and other types of Voltage disturbances such as sag, swell, and unbalance. In addition, boosting the positive sequence assists in regulating the load Voltage.
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Unified approach for mitigating Voltage sag and Voltage Flicker using the DSTATCOM
IEEE Transactions on Power Delivery, 2005Co-Authors: A. Elnady, Magdy M. A. SalamaAbstract:This paper introduces a novel method for the mitigation of the Voltage sag and Voltage Flicker by using Kalman filter and its derivatives (adaptive, and extended). The Kalman filter is used as a tool to extract both the instantaneous envelope of the Voltage sags, and to extract the Instantaneous Flicker Level (IFL) of the Voltage Flicker. Also, this paper demonstrates the advantages of using the Kalman filter instead of the existing tools for tracking and extracting Voltage disturbances. Digital simulation results are presented to illustrate the mitigation of unbalanced Voltage sags, and the compensation of the cyclic and noncyclic Voltage Flicker by employing the proposed algorithm.
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hilbert transform based control algorithm of the dg interface for Voltage Flicker mitigation
IEEE Transactions on Power Delivery, 2005Co-Authors: Mostafa I. Marei, T K Abdelgalil, E F Elsaadany, Magdy M. A. SalamaAbstract:Distributed Generation (DG) is used widely in the modern distribution systems. This paper proposes a novel functionality of the interface between DG and the utility network to mitigate the Voltage Flicker and to regulate the Voltage at the Point of Common Coupling (PCC) in addition to its main function of controlling the power flow. A new control algorithm for the DG interface based on the Hilbert transform (HT) is presented. The HT is employed as an effective technique for tracking the Voltage Flicker levels in distribution systems. The mathematical simplicity of the proposed technique, compared with the commonly used algorithms in the literature, renders them competitive candidates for the on-line tracking of Voltage Flicker. The accurate tracking of the HT facilitates its implementation for the control of Flicker mitigation devices. Simulation results are provided to verify the tracking capabilities of the HT and to evaluate the performance of the proposed DG interface for multifunction operation.
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Unified approach for mitigating Voltage sag and Voltage Flicker using the DSTATCOM
IEEE Power Engineering Society General Meeting 2004., 2004Co-Authors: A. Elnady, Magdy M. A. SalamaAbstract:Summary form only given. This paper introduces a novel method for the mitigation of the Voltage sag and Voltage Flicker by using Kalman filter and its derivatives (adaptive, and extended). The Kalman filter is used as a tool to extract both the instantaneous envelope of the Voltage sags, and to extract the instantaneous Flicker level (IFL) of the Voltage Flicker. Also the paper demonstrates the advantages of using the Kalman filter instead of the existing tools for tracking and extracting Voltage disturbances. Digital simulation results are presented to illustrate the mitigation of unbalanced Voltage sags, and the compensation of the cyclic and noncyclic Voltage Flicker by employing the proposed algorithm.
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Online tracking of Voltage Flicker utilizing energy operator and Hilbert transform
IEEE Transactions on Power Delivery, 2004Co-Authors: T.k. Abdel-galil, Ehab F. El-saadany, Magdy M. A. SalamaAbstract:The Teager energy operator (TEO) and the Hilbert transform (HT) are introduced in this paper as effective approaches for tracking the Voltage Flicker levels in distribution systems. The mathematical simplicity of the proposed techniques, compared with the commonly used algorithms in the literature, renders them competitive candidates for the online tracking of Voltage Flicker levels. Moreover, the TEO and the HT are capable of tracking the amplitude variations of the Voltage Flicker and supply frequency in industrial systems with only a 3% margin of error. Such accurate tracking facilitates the implementation of the control of Flicker mitigation devices. A detailed comparison of the two proposed approaches that profile the different factors affecting tracking accuracy is presented. The results are provided to verify the tracking capabilities of both HT and TEO and to indicate the superior performance of the TEO and the HT in tracking Voltage Flicker.
Yung-ruei Chang - One of the best experts on this subject based on the ideXlab platform.
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An Accurate Solution Procedure for Calculation of Voltage Flicker Components
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Cheng-i Chen, Yeong-chin Chen, Yung-ruei ChangAbstract:Voltage Flicker is one of many serious power quality disturbances, which would deteriorate the stability and operation efficiency of a power system. Effective evaluation of Flicker severity plays an important role in the monitoring and control of developing advanced metering infrastructure. Since the evaluation process for Voltage Flicker is complicated, some inaccurate intermediate results may give rise to the propagation of estimation errors. Therefore, an accurate solution procedure for the calculation of Voltage Flicker components is proposed in this paper. With the extraction technique for envelope signal and high-frequency resolution mechanism for Flicker spectral analysis, the superior performance to achieve the instantaneous Flicker severity evaluation can be obtained.
Armando Sina - One of the best experts on this subject based on the ideXlab platform.
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Voltage Flicker compensation using STATCOM
2009 4th IEEE Conference on Industrial Electronics and Applications ICIEA 2009, 2009Co-Authors: Mahmood Joorabian, Davar Mirabbasi, Armando SinaAbstract:Voltage Flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on Voltage source converters, FACTS devices have been gradually noticed to be used for Voltage Flicker compensation. This paper covers the contrasting approaches; dealing with the Voltage Flicker mitigation in three stages and assessing the related results in details. Initially, the Voltage Flicker mitigation, using FCTCR (fixed capacitor thyristor controlled reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for the Flicker compensation. All the simulations have been performed on the MATLAB Software.
Cheng-i Chen - One of the best experts on this subject based on the ideXlab platform.
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An Accurate Solution Procedure for Calculation of Voltage Flicker Components
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Cheng-i Chen, Yeong-chin Chen, Yung-ruei ChangAbstract:Voltage Flicker is one of many serious power quality disturbances, which would deteriorate the stability and operation efficiency of a power system. Effective evaluation of Flicker severity plays an important role in the monitoring and control of developing advanced metering infrastructure. Since the evaluation process for Voltage Flicker is complicated, some inaccurate intermediate results may give rise to the propagation of estimation errors. Therefore, an accurate solution procedure for the calculation of Voltage Flicker components is proposed in this paper. With the extraction technique for envelope signal and high-frequency resolution mechanism for Flicker spectral analysis, the superior performance to achieve the instantaneous Flicker severity evaluation can be obtained.
Mahmood Joorabian - One of the best experts on this subject based on the ideXlab platform.
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Voltage Flicker compensation using STATCOM
2009 4th IEEE Conference on Industrial Electronics and Applications ICIEA 2009, 2009Co-Authors: Mahmood Joorabian, Davar Mirabbasi, Armando SinaAbstract:Voltage Flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on Voltage source converters, FACTS devices have been gradually noticed to be used for Voltage Flicker compensation. This paper covers the contrasting approaches; dealing with the Voltage Flicker mitigation in three stages and assessing the related results in details. Initially, the Voltage Flicker mitigation, using FCTCR (fixed capacitor thyristor controlled reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for the Flicker compensation. All the simulations have been performed on the MATLAB Software.
