The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
Anup Kumar Panda - One of the best experts on this subject based on the ideXlab platform.
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Real time implementation of PI and fuzzy logic controller based 3-phase 4-wire interleaved buck active power filter for mitigation of harmonics with id–iq control strategy
International Journal of Electrical Power & Energy Systems, 2014Co-Authors: Ranjeeta Patel, Anup Kumar PandaAbstract:Abstract The “shoot-through” Failure, one of the most Hazardous Failure modes encountered in conventional inverter circuit which is used as the main circuit of the active power filter (APF). Shoot-through phenomenon has few distinct disadvantages like; it introduces typical ringing, increases temperature rise in power switches, causes higher Electromagnetic Interference (EMI) and reduces the efficiency of the circuit. To avert the “shoot-through”, dead time control could be added but it deteriorates the harmonic compensation level. A novel 3-phase 4-wire active power filter (APF) based on interleaved buck (IB) DC-to-AC converter with the instantaneous active and reactive current component (id–iq) control strategy is proposed here to mitigate the harmonics having PI and fuzzy logic (FLC) controllers. This interleaved buck (IB) DC-to-AC converter is an augmented version of the conventional phase leg configuration and is innately immune to “shoot-through” phenomenon, with the elimination of special protection features required in conventional inverter circuits. Here in this paper, a comparison has been made between the compensation capabilities of the 3-phase IB-APF with the PI and fuzzy logic controller (FLC) used by id–iq control strategy under different supply voltage conditions. The performance of the control strategies have been evaluated in terms of harmonic mitigation and DC link voltage regulation. Extensive simulations have been carried out in the MATLAB / SIMULINK environment and also implemented using Real-Time Digital Simulator Hardware (RTDS-Hardware).
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Real time implementation of PI and fuzzy logic controller based 3-phase 4-wire interleaved buck active power filter for mitigation of harmonics with id-iq control strategy
International Journal of Electrical Power and Energy Systems, 2014Co-Authors: Ranjeeta Patel, Anup Kumar PandaAbstract:The "shoot-through" Failure, one of the most Hazardous Failure modes encountered in conventional inverter circuit which is used as the main circuit of the active power filter (APF). Shoot-through phenomenon has few distinct disadvantages like; it introduces typical ringing, increases temperature rise in power switches, causes higher Electromagnetic Interference (EMI) and reduces the efficiency of the circuit. To avert the "shoot-through", dead time control could be added but it deteriorates the harmonic compensation level. A novel 3-phase 4-wire active power filter (APF) based on interleaved buck (IB) DC-to-AC converter with the instantaneous active and reactive current component (id-iq) control strategy is proposed here to mitigate the harmonics having PI and fuzzy logic (FLC) controllers. This interleaved buck (IB) DC-to-AC converter is an augmented version of the conventional phase leg configuration and is innately immune to "shoot-through" phenomenon, with the elimination of special protection features required in conventional inverter circuits. Here in this paper, a comparison has been made between the compensation capabilities of the 3-phase IB-APF with the PI and fuzzy logic controller (FLC) used by id-i q control strategy under different supply voltage conditions. The performance of the control strategies have been evaluated in terms of harmonic mitigation and DC link voltage regulation. Extensive simulations have been carried out in the MATLAB / SIMULINK environment and also implemented using Real-Time Digital Simulator Hardware (RTDS-Hardware). © 2014 Elsevier Ltd. All rights reserved.
Ranjeeta Patel - One of the best experts on this subject based on the ideXlab platform.
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Real time implementation of PI and fuzzy logic controller based 3-phase 4-wire interleaved buck active power filter for mitigation of harmonics with id–iq control strategy
International Journal of Electrical Power & Energy Systems, 2014Co-Authors: Ranjeeta Patel, Anup Kumar PandaAbstract:Abstract The “shoot-through” Failure, one of the most Hazardous Failure modes encountered in conventional inverter circuit which is used as the main circuit of the active power filter (APF). Shoot-through phenomenon has few distinct disadvantages like; it introduces typical ringing, increases temperature rise in power switches, causes higher Electromagnetic Interference (EMI) and reduces the efficiency of the circuit. To avert the “shoot-through”, dead time control could be added but it deteriorates the harmonic compensation level. A novel 3-phase 4-wire active power filter (APF) based on interleaved buck (IB) DC-to-AC converter with the instantaneous active and reactive current component (id–iq) control strategy is proposed here to mitigate the harmonics having PI and fuzzy logic (FLC) controllers. This interleaved buck (IB) DC-to-AC converter is an augmented version of the conventional phase leg configuration and is innately immune to “shoot-through” phenomenon, with the elimination of special protection features required in conventional inverter circuits. Here in this paper, a comparison has been made between the compensation capabilities of the 3-phase IB-APF with the PI and fuzzy logic controller (FLC) used by id–iq control strategy under different supply voltage conditions. The performance of the control strategies have been evaluated in terms of harmonic mitigation and DC link voltage regulation. Extensive simulations have been carried out in the MATLAB / SIMULINK environment and also implemented using Real-Time Digital Simulator Hardware (RTDS-Hardware).
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Real time implementation of PI and fuzzy logic controller based 3-phase 4-wire interleaved buck active power filter for mitigation of harmonics with id-iq control strategy
International Journal of Electrical Power and Energy Systems, 2014Co-Authors: Ranjeeta Patel, Anup Kumar PandaAbstract:The "shoot-through" Failure, one of the most Hazardous Failure modes encountered in conventional inverter circuit which is used as the main circuit of the active power filter (APF). Shoot-through phenomenon has few distinct disadvantages like; it introduces typical ringing, increases temperature rise in power switches, causes higher Electromagnetic Interference (EMI) and reduces the efficiency of the circuit. To avert the "shoot-through", dead time control could be added but it deteriorates the harmonic compensation level. A novel 3-phase 4-wire active power filter (APF) based on interleaved buck (IB) DC-to-AC converter with the instantaneous active and reactive current component (id-iq) control strategy is proposed here to mitigate the harmonics having PI and fuzzy logic (FLC) controllers. This interleaved buck (IB) DC-to-AC converter is an augmented version of the conventional phase leg configuration and is innately immune to "shoot-through" phenomenon, with the elimination of special protection features required in conventional inverter circuits. Here in this paper, a comparison has been made between the compensation capabilities of the 3-phase IB-APF with the PI and fuzzy logic controller (FLC) used by id-i q control strategy under different supply voltage conditions. The performance of the control strategies have been evaluated in terms of harmonic mitigation and DC link voltage regulation. Extensive simulations have been carried out in the MATLAB / SIMULINK environment and also implemented using Real-Time Digital Simulator Hardware (RTDS-Hardware). © 2014 Elsevier Ltd. All rights reserved.
Karol Rastocný - One of the best experts on this subject based on the ideXlab platform.
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Hazardous Failure rate of the safety function
International Conference on Transport Systems Telematics, 2015Co-Authors: Karol Rastocný, Juraj ždanskyAbstract:Quantitative assessment of safety function integrity against random Failures is necessary assumption for railway signalling system acceptance and its implementation into operation. The railway signalling system can be modelled as continuous mode system and therefore the criterion for quantitative assessment safety integrity of safety function is Hazardous Failure rate. Most of commonly available software tools for evaluation of the RAMS parameters offer calculation of safety function Failure probability, but don’t offer direct calculation of safety function Failure rate. The paper is focused on some of problems associated with comparing the exact analytical solution and approximate calculation of safety function Failure rate due to presence of random Failures. This approach can be successfully applied to “manual” calculation of also complex analytical terms. The proposed method is based on the generally accepted assumption that occurrence of random Failures of electronic systems corresponds to an exponential distribution law.
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TST - Hazardous Failure Rate of the Safety Function
Communications in Computer and Information Science, 2015Co-Authors: Karol Rastocný, Juraj ždanskyAbstract:Quantitative assessment of safety function integrity against random Failures is necessary assumption for railway signalling system acceptance and its implementation into operation. The railway signalling system can be modelled as continuous mode system and therefore the criterion for quantitative assessment safety integrity of safety function is Hazardous Failure rate. Most of commonly available software tools for evaluation of the RAMS parameters offer calculation of safety function Failure probability, but don’t offer direct calculation of safety function Failure rate. The paper is focused on some of problems associated with comparing the exact analytical solution and approximate calculation of safety function Failure rate due to presence of random Failures. This approach can be successfully applied to “manual” calculation of also complex analytical terms. The proposed method is based on the generally accepted assumption that occurrence of random Failures of electronic systems corresponds to an exponential distribution law.
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PDeS - Considerations of the recovery in 2-out-of-3 safety-related control system
IFAC Proceedings Volumes, 2012Co-Authors: Juraj Ilavský, Karol RastocnýAbstract:Each form of recovery can be modelled as different system behaviour with respect to its state-space, therefore the recovery – either after a random hardware Failure of after a scheduled maintenance – has major impact on system safety. The paper summarises theoretical background and establishes assumptions on recovery implementation into generic model of 2-out-of-3 control system. A continuous Time Markov Chain method is used to model and evaluate safety, while Hazardous Failure rate of the system serves as a quantitative safety measure.
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what is concealed behind the Hazardous Failure rate of a system
International Conference on Transport Systems Telematics, 2011Co-Authors: Karol Rastocný, Juraj IlavskýAbstract:Quantitative safety assessment of safety-related control systems consists of many steps, with the creation of a valid mathematical model being the one of most important one. Assumption on constant Failure rate of a system leads to numerous approximations that are made in the process of model creation. These approximations need to be coherent with the philosophy of safety assessment and must be discarded if they could artificially increase the safety level of the modelled system. Nevertheless, if probability of the Hazardous Failure and Hazardous Failure rate as safety measures are compared, currently used approximations allow to achieve inaccurate or even invalid results of the safety assessment. The scope of the paper covers exact and approximate approach to the safety assessment of a two-channel redundant system structure comprised of dissimilar channels. Outcomes and conclusions of the paper can be immediately applied in many forms of the quantitative safety evaluation.
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TST - What Is Concealed behind the Hazardous Failure Rate of a System
Communications in Computer and Information Science, 2011Co-Authors: Karol Rastocný, Juraj IlavskýAbstract:Quantitative safety assessment of safety-related control systems consists of many steps, with the creation of a valid mathematical model being the one of most important one. Assumption on constant Failure rate of a system leads to numerous approximations that are made in the process of model creation. These approximations need to be coherent with the philosophy of safety assessment and must be discarded if they could artificially increase the safety level of the modelled system. Nevertheless, if probability of the Hazardous Failure and Hazardous Failure rate as safety measures are compared, currently used approximations allow to achieve inaccurate or even invalid results of the safety assessment. The scope of the paper covers exact and approximate approach to the safety assessment of a two-channel redundant system structure comprised of dissimilar channels. Outcomes and conclusions of the paper can be immediately applied in many forms of the quantitative safety evaluation.
Juraj Ilavský - One of the best experts on this subject based on the ideXlab platform.
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PDeS - Considerations of the recovery in 2-out-of-3 safety-related control system
IFAC Proceedings Volumes, 2012Co-Authors: Juraj Ilavský, Karol RastocnýAbstract:Each form of recovery can be modelled as different system behaviour with respect to its state-space, therefore the recovery – either after a random hardware Failure of after a scheduled maintenance – has major impact on system safety. The paper summarises theoretical background and establishes assumptions on recovery implementation into generic model of 2-out-of-3 control system. A continuous Time Markov Chain method is used to model and evaluate safety, while Hazardous Failure rate of the system serves as a quantitative safety measure.
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what is concealed behind the Hazardous Failure rate of a system
International Conference on Transport Systems Telematics, 2011Co-Authors: Karol Rastocný, Juraj IlavskýAbstract:Quantitative safety assessment of safety-related control systems consists of many steps, with the creation of a valid mathematical model being the one of most important one. Assumption on constant Failure rate of a system leads to numerous approximations that are made in the process of model creation. These approximations need to be coherent with the philosophy of safety assessment and must be discarded if they could artificially increase the safety level of the modelled system. Nevertheless, if probability of the Hazardous Failure and Hazardous Failure rate as safety measures are compared, currently used approximations allow to achieve inaccurate or even invalid results of the safety assessment. The scope of the paper covers exact and approximate approach to the safety assessment of a two-channel redundant system structure comprised of dissimilar channels. Outcomes and conclusions of the paper can be immediately applied in many forms of the quantitative safety evaluation.
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TST - What Is Concealed behind the Hazardous Failure Rate of a System
Communications in Computer and Information Science, 2011Co-Authors: Karol Rastocný, Juraj IlavskýAbstract:Quantitative safety assessment of safety-related control systems consists of many steps, with the creation of a valid mathematical model being the one of most important one. Assumption on constant Failure rate of a system leads to numerous approximations that are made in the process of model creation. These approximations need to be coherent with the philosophy of safety assessment and must be discarded if they could artificially increase the safety level of the modelled system. Nevertheless, if probability of the Hazardous Failure and Hazardous Failure rate as safety measures are compared, currently used approximations allow to achieve inaccurate or even invalid results of the safety assessment. The scope of the paper covers exact and approximate approach to the safety assessment of a two-channel redundant system structure comprised of dissimilar channels. Outcomes and conclusions of the paper can be immediately applied in many forms of the quantitative safety evaluation.
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Quantification of the safety level of a safety-critical control system
2010 International Conference on Applied Electronics, 2010Co-Authors: Karol Rastocný, Juraj IlavskýAbstract:This paper introduces a method of evaluating the Hazardous Failure rate of a safety relevant control system if the state probability distribution is given as a result of an absorbing Continuous Time Markov Chain analysis. Markov Chains with more than one absorbing state are contemplated and eventually the case study is presented.
Juraj ždansky - One of the best experts on this subject based on the ideXlab platform.
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Hazardous Failure rate of the safety function
International Conference on Transport Systems Telematics, 2015Co-Authors: Karol Rastocný, Juraj ždanskyAbstract:Quantitative assessment of safety function integrity against random Failures is necessary assumption for railway signalling system acceptance and its implementation into operation. The railway signalling system can be modelled as continuous mode system and therefore the criterion for quantitative assessment safety integrity of safety function is Hazardous Failure rate. Most of commonly available software tools for evaluation of the RAMS parameters offer calculation of safety function Failure probability, but don’t offer direct calculation of safety function Failure rate. The paper is focused on some of problems associated with comparing the exact analytical solution and approximate calculation of safety function Failure rate due to presence of random Failures. This approach can be successfully applied to “manual” calculation of also complex analytical terms. The proposed method is based on the generally accepted assumption that occurrence of random Failures of electronic systems corresponds to an exponential distribution law.
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TST - Hazardous Failure Rate of the Safety Function
Communications in Computer and Information Science, 2015Co-Authors: Karol Rastocný, Juraj ždanskyAbstract:Quantitative assessment of safety function integrity against random Failures is necessary assumption for railway signalling system acceptance and its implementation into operation. The railway signalling system can be modelled as continuous mode system and therefore the criterion for quantitative assessment safety integrity of safety function is Hazardous Failure rate. Most of commonly available software tools for evaluation of the RAMS parameters offer calculation of safety function Failure probability, but don’t offer direct calculation of safety function Failure rate. The paper is focused on some of problems associated with comparing the exact analytical solution and approximate calculation of safety function Failure rate due to presence of random Failures. This approach can be successfully applied to “manual” calculation of also complex analytical terms. The proposed method is based on the generally accepted assumption that occurrence of random Failures of electronic systems corresponds to an exponential distribution law.
