The Experts below are selected from a list of 17934 Experts worldwide ranked by ideXlab platform
Hossein Mokhtari - One of the best experts on this subject based on the ideXlab platform.
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Effect of Source Phase Difference on Static Transfer Switch Performance
IEEE Transactions on Power Delivery, 2007Co-Authors: Hossein Mokhtari, Reza M. IravaniAbstract:A thyristor-based static Transfer Switch (STS) provides a continuous supply for a voltage sensitive load through fast Transfer between two sources when the main source does not meet load voltage requirements. This paper investigates the impact of phase difference between the corresponding voltages of the two sources on the load Transfer performance achieved by an STS. The studies are performed on the IEEE benchmark STS-1 system using the power system computer-aided design/electromagnetic transient dc simulation software. The studies indicate that the impact of phase difference on the STS load Transfer time is insignificant when the sensitive load is a passive (e.g., RL) load. However, if the load can operate in a regenerative mode (e.g., a motor load), the effect of phase difference on the Transfer time is noticeable. The studies show that a phase difference of 25deg can increase the load Transfer time by about 2 ms
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analysis of a static Transfer Switch with respect to Transfer time
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Shashi B. Dewan, M R IravaniAbstract:Thyristor-based static Transfer Switches (STSs) are used in uninterruptible power supply systems and in distribution networks to provide connection to alternate sources of ac power for critical loads when the main sources fail. Performance of STSs from a Transfer time point of view has not been reported in the technical literature, however. This performance evaluation is a complex issue due to the dependence of the Transfer time on gating scheme and commutation between thyristors. This article provides a thorough analysis of a fast gating strategy for STS systems. It derives analytical expressions to estimate the Transfer time for different operating conditions and identifies the worst-case scenario(s) in which maximum Transfer time occurs. The analytical results are validated based on time-domain simulation studies using the PSCAD/EMTDC package for a medium-voltage system. The simulation results are verified based on comparison with those obtained from an experimental set-up.
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benchmark systems for digital computer simulation of a static Transfer Switch
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Peter W Lehn, M R Iravani, Shashi B. Dewan, J. A. MartínezAbstract:This paper presents two benchmark systems for time-domain simulation of a thyristor-based static Transfer Switch (STS). The objectives are: (1) to provide guidelines for digital simulation of STS systems, (2) to provide a basis for performance evaluation of simulation programs used for STS analysis, and (3) to benchmark performance of various detection/control strategies adopted for STS systems. Each benchmark system is composed of: (1) a supply system, (2) STS, and (3) sensitive load. The two benchmark systems are referred to as STS-1 and STS-2. Simulated performances of the two systems, based on the use of the PSCAD/EMTDC software package, are provided. Simulation results corresponding to STS-2 are also compared with the corresponding measurement results.
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Effect of regenerative load on a static Transfer Switch performance
IEEE Transactions on Power Delivery, 2001Co-Authors: Hossein Mokhtari, Shashi B. DewanAbstract:A thyristor-based static Transfer Switch (STS) is used to connect an alternate source of AC power to a sensitive load when the main source fails. A main criterion for performance evaluation of a STS is the Transfer time from the main to the alternate source. The Transfer time depends upon the commutation process of the outgoing and incoming Switches which in turn depends on the system parameters and the load characteristics. This paper investigates the effect of a regenerative load on the Transfer time/total load-Transfer time of a STS and identifies the worst case scenario(s) in which maximum Transfer time occurs. The IEEE STS benchmark models STS-1 and STS-2 are chosen to demonstrate the STS performance under various fault/disturbance conditions in a medium-voltage distribution system and a low-voltage experimental set-up system. The simulations are performed using the PSCAD/EMTDC package. The paper shows that a hybrid load can operate in regenerative mode depending on the load parameters and fault/disturbance characteristics.
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performance evaluation of thyristor based static Transfer Switch
IEEE Transactions on Power Delivery, 2000Co-Authors: Hossein Mokhtari, Shashi B. Dewan, M R TravaniAbstract:Industrial customers are becoming more sensitive to variations of utility supply systems due to the growing demand for process controls in automated plants. One option to increase reliability and quality of AC power is to provide sensitive customers with access to two independent power sources. In this paper, a fast thyristor based static Transfer Switch (STS) is proposed which employs fast voltage-detection and thyristor gating strategies to connect the customer to either of the two sources. Performance of the designed STS system is evaluated using the Electromagnetic Transients for DC (EMTDC). Simulation results are verified by comparing them with experimental results.
Enda Wista Sinuraya - One of the best experts on this subject based on the ideXlab platform.
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perancangan automatic Transfer Switch ats mode transisi open transition re Transfer dengan parameter transisi berupa tegangan dan frekuensi
Transient: Jurnal Ilmiah Teknik Elektro, 2014Co-Authors: Paul Henry Ginting, Tejo Sukmadi, Enda Wista SinurayaAbstract:Abstrak Kontiunitas Penyaluran energi listrik dari pusat pembangkit sampai ke konsumen tidak bisa dijamin tersedia setiap saat. Sehingga untuk konsumen yang membutuhkan jaminan ketersediaan energi listrik setiap saat, dibutuhkan suplai cadangan (Genset) yang mempunyai kapasitas yang cukup untuk menanggung semua beban di tempat tersebut apabila suplai dari jaringan listrik terputus. Penelitian ini menghasilkan Automatic Transfer Switch (ATS) yang mampu mengakuisisi data berupa tegangan dengan galat rata-rata sebesar 3,624 & Frekuensi dengan galat rata-rata sebesar 0,407. Ketika Suplai Utama (PLN) terputus atau mengalami gangguan , yang dapat diamati dari nilai Tegangan maupun Frekuensi yang tidak memenuhi standard yang ditetapkan oleh PLN, maka ATS akan memerintahkan Genset untuk starting dan suplai beban diambil alih oleh Genset dengan jeda waktu selama 15 detik. Dan ketika suplai utama (PLN) kembali normal maka suplai beban kembali diambil alih oleh PLN dengan jeda waktu selama 10 detik. ATS pada penelitian ini juga dilengkapi Lampu LED dan Buzzer sebagai indikator kondisi operasi, kegagalan starting, dan gangguan pada Genset. Kata kunci : Automatic Transfer Switch, Tegangan, Frekuensi, Genset Abstract Continuity distribution of electric energy from the center of power to the consumers cannot be guaranteed is available at any time. So as to consumers who need a guarantee the availability of electrical energy all the time, it takes the supply of reserves ( generator ) that has sufficient capacity to shouldered the entire burden on the spot when the supply of electricity cut off. This research produce automatic Transfer a Switch ( ATS ) capable of being acquired data in the form of voltage with error average of 3,624 & the frequency with error average of 0,407. When the supply of the main ( PLN ) disconnected or experiencing disorder; that can be observed of the value of voltage or the frequency of which do not meet the standards set by PLN and then ATS will command generator for starting and supplies the burden of taken over by generator in a pause of time during which 15 seconds. And when the supply of the main ( PLN ) back to normal then the supply of burden back taken over by PLN and a pause the time during which 10 seconds. ATS in this research are completed with an led light, and buzzer operating conditions, as an indicator of the failure of starting, and a disorder in generator. Keywords: Automatic Transfer Switch, Voltage, Frequency, Genset
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perancangan automatic Transfer Switch ats mode transisi open transition re Transfer dengan parameter transisi berupa tegangan dan frekuensi
Transient: Jurnal Ilmiah Teknik Elektro, 2014Co-Authors: Paul Henry Ginting, Tejo Sukmadi, Enda Wista SinurayaAbstract:Abstrak Kontiunitas Penyaluran energi listrik dari pusat pembangkit sampai ke konsumen tidak bisa dijamin tersedia setiap saat. Sehingga untuk konsumen yang membutuhkan jaminan ketersediaan energi listrik setiap saat, dibutuhkan suplai cadangan (Genset) yang mempunyai kapasitas yang cukup untuk menanggung semua beban di tempat tersebut apabila suplai dari jaringan listrik terputus. Penelitian ini menghasilkan Automatic Transfer Switch (ATS) yang mampu mengakuisisi data berupa tegangan dengan galat rata-rata sebesar 3,624 & Frekuensi dengan galat rata-rata sebesar 0,407. Ketika Suplai Utama (PLN) terputus atau mengalami gangguan , yang dapat diamati dari nilai Tegangan maupun Frekuensi yang tidak memenuhi standard yang ditetapkan oleh PLN, maka ATS akan memerintahkan Genset untuk starting dan suplai beban diambil alih oleh Genset dengan jeda waktu selama 15 detik. Dan ketika suplai utama (PLN) kembali normal maka suplai beban kembali diambil alih oleh PLN dengan jeda waktu selama 10 detik. ATS pada penelitian ini juga dilengkapi Lampu LED dan Buzzer sebagai indikator kondisi operasi, kegagalan starting, dan gangguan pada Genset. Kata kunci : Automatic Transfer Switch, Tegangan, Frekuensi, Genset Abstract Continuity distribution of electric energy from the center of power to the consumers cannot be guaranteed is available at any time. So as to consumers who need a guarantee the availability of electrical energy all the time, it takes the supply of reserves ( generator ) that has sufficient capacity to shouldered the entire burden on the spot when the supply of electricity cut off. This research produce automatic Transfer a Switch ( ATS ) capable of being acquired data in the form of voltage with error average of 3,624 & the frequency with error average of 0,407. When the supply of the main ( PLN ) disconnected or experiencing disorder; that can be observed of the value of voltage or the frequency of which do not meet the standards set by PLN and then ATS will command generator for starting and supplies the burden of taken over by generator in a pause of time during which 15 seconds. And when the supply of the main ( PLN ) back to normal then the supply of burden back taken over by PLN and a pause the time during which 10 seconds. ATS in this research are completed with an led light, and buzzer operating conditions, as an indicator of the failure of starting, and a disorder in generator. Keywords: Automatic Transfer Switch, Voltage, Frequency, Genset
M R Iravani - One of the best experts on this subject based on the ideXlab platform.
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analysis of a static Transfer Switch with respect to Transfer time
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Shashi B. Dewan, M R IravaniAbstract:Thyristor-based static Transfer Switches (STSs) are used in uninterruptible power supply systems and in distribution networks to provide connection to alternate sources of ac power for critical loads when the main sources fail. Performance of STSs from a Transfer time point of view has not been reported in the technical literature, however. This performance evaluation is a complex issue due to the dependence of the Transfer time on gating scheme and commutation between thyristors. This article provides a thorough analysis of a fast gating strategy for STS systems. It derives analytical expressions to estimate the Transfer time for different operating conditions and identifies the worst-case scenario(s) in which maximum Transfer time occurs. The analytical results are validated based on time-domain simulation studies using the PSCAD/EMTDC package for a medium-voltage system. The simulation results are verified based on comparison with those obtained from an experimental set-up.
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benchmark systems for digital computer simulation of a static Transfer Switch
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Peter W Lehn, M R Iravani, Shashi B. Dewan, J. A. MartínezAbstract:This paper presents two benchmark systems for time-domain simulation of a thyristor-based static Transfer Switch (STS). The objectives are: (1) to provide guidelines for digital simulation of STS systems, (2) to provide a basis for performance evaluation of simulation programs used for STS analysis, and (3) to benchmark performance of various detection/control strategies adopted for STS systems. Each benchmark system is composed of: (1) a supply system, (2) STS, and (3) sensitive load. The two benchmark systems are referred to as STS-1 and STS-2. Simulated performances of the two systems, based on the use of the PSCAD/EMTDC software package, are provided. Simulation results corresponding to STS-2 are also compared with the corresponding measurement results.
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Modeling and simulation of a static Transfer Switch
2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194), 2001Co-Authors: M R IravaniAbstract:This summary discusses time-domain simulation results of two thyristor based static Transfer Switch (STS) systems. The objectives are: (1) to provide guidelines for digital simulation of STS systems; and (2) to provide a basis for accuracy evaluation of simulation studies used for STS performance analysis. Each system is composed of: (1) a supply system; (2) a STS; and (3) a sensitive load. The two systems are referred to as STS-1 and STS-2. Simulation performances of the two systems are obtained based on the use of PSCAD/EMTDC software package. Simulation results corresponding to STS-2 are also compared with the measurement results.
Shashi B. Dewan - One of the best experts on this subject based on the ideXlab platform.
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analysis of a static Transfer Switch with respect to Transfer time
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Shashi B. Dewan, M R IravaniAbstract:Thyristor-based static Transfer Switches (STSs) are used in uninterruptible power supply systems and in distribution networks to provide connection to alternate sources of ac power for critical loads when the main sources fail. Performance of STSs from a Transfer time point of view has not been reported in the technical literature, however. This performance evaluation is a complex issue due to the dependence of the Transfer time on gating scheme and commutation between thyristors. This article provides a thorough analysis of a fast gating strategy for STS systems. It derives analytical expressions to estimate the Transfer time for different operating conditions and identifies the worst-case scenario(s) in which maximum Transfer time occurs. The analytical results are validated based on time-domain simulation studies using the PSCAD/EMTDC package for a medium-voltage system. The simulation results are verified based on comparison with those obtained from an experimental set-up.
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benchmark systems for digital computer simulation of a static Transfer Switch
IEEE Power & Energy Magazine, 2001Co-Authors: Hossein Mokhtari, Peter W Lehn, M R Iravani, Shashi B. Dewan, J. A. MartínezAbstract:This paper presents two benchmark systems for time-domain simulation of a thyristor-based static Transfer Switch (STS). The objectives are: (1) to provide guidelines for digital simulation of STS systems, (2) to provide a basis for performance evaluation of simulation programs used for STS analysis, and (3) to benchmark performance of various detection/control strategies adopted for STS systems. Each benchmark system is composed of: (1) a supply system, (2) STS, and (3) sensitive load. The two benchmark systems are referred to as STS-1 and STS-2. Simulated performances of the two systems, based on the use of the PSCAD/EMTDC software package, are provided. Simulation results corresponding to STS-2 are also compared with the corresponding measurement results.
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Effect of regenerative load on a static Transfer Switch performance
IEEE Transactions on Power Delivery, 2001Co-Authors: Hossein Mokhtari, Shashi B. DewanAbstract:A thyristor-based static Transfer Switch (STS) is used to connect an alternate source of AC power to a sensitive load when the main source fails. A main criterion for performance evaluation of a STS is the Transfer time from the main to the alternate source. The Transfer time depends upon the commutation process of the outgoing and incoming Switches which in turn depends on the system parameters and the load characteristics. This paper investigates the effect of a regenerative load on the Transfer time/total load-Transfer time of a STS and identifies the worst case scenario(s) in which maximum Transfer time occurs. The IEEE STS benchmark models STS-1 and STS-2 are chosen to demonstrate the STS performance under various fault/disturbance conditions in a medium-voltage distribution system and a low-voltage experimental set-up system. The simulations are performed using the PSCAD/EMTDC package. The paper shows that a hybrid load can operate in regenerative mode depending on the load parameters and fault/disturbance characteristics.
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performance evaluation of thyristor based static Transfer Switch
IEEE Transactions on Power Delivery, 2000Co-Authors: Hossein Mokhtari, Shashi B. Dewan, M R TravaniAbstract:Industrial customers are becoming more sensitive to variations of utility supply systems due to the growing demand for process controls in automated plants. One option to increase reliability and quality of AC power is to provide sensitive customers with access to two independent power sources. In this paper, a fast thyristor based static Transfer Switch (STS) is proposed which employs fast voltage-detection and thyristor gating strategies to connect the customer to either of the two sources. Performance of the designed STS system is evaluated using the Electromagnetic Transients for DC (EMTDC). Simulation results are verified by comparing them with experimental results.
Paul Henry Ginting - One of the best experts on this subject based on the ideXlab platform.
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perancangan automatic Transfer Switch ats mode transisi open transition re Transfer dengan parameter transisi berupa tegangan dan frekuensi
Transient: Jurnal Ilmiah Teknik Elektro, 2014Co-Authors: Paul Henry Ginting, Tejo Sukmadi, Enda Wista SinurayaAbstract:Abstrak Kontiunitas Penyaluran energi listrik dari pusat pembangkit sampai ke konsumen tidak bisa dijamin tersedia setiap saat. Sehingga untuk konsumen yang membutuhkan jaminan ketersediaan energi listrik setiap saat, dibutuhkan suplai cadangan (Genset) yang mempunyai kapasitas yang cukup untuk menanggung semua beban di tempat tersebut apabila suplai dari jaringan listrik terputus. Penelitian ini menghasilkan Automatic Transfer Switch (ATS) yang mampu mengakuisisi data berupa tegangan dengan galat rata-rata sebesar 3,624 & Frekuensi dengan galat rata-rata sebesar 0,407. Ketika Suplai Utama (PLN) terputus atau mengalami gangguan , yang dapat diamati dari nilai Tegangan maupun Frekuensi yang tidak memenuhi standard yang ditetapkan oleh PLN, maka ATS akan memerintahkan Genset untuk starting dan suplai beban diambil alih oleh Genset dengan jeda waktu selama 15 detik. Dan ketika suplai utama (PLN) kembali normal maka suplai beban kembali diambil alih oleh PLN dengan jeda waktu selama 10 detik. ATS pada penelitian ini juga dilengkapi Lampu LED dan Buzzer sebagai indikator kondisi operasi, kegagalan starting, dan gangguan pada Genset. Kata kunci : Automatic Transfer Switch, Tegangan, Frekuensi, Genset Abstract Continuity distribution of electric energy from the center of power to the consumers cannot be guaranteed is available at any time. So as to consumers who need a guarantee the availability of electrical energy all the time, it takes the supply of reserves ( generator ) that has sufficient capacity to shouldered the entire burden on the spot when the supply of electricity cut off. This research produce automatic Transfer a Switch ( ATS ) capable of being acquired data in the form of voltage with error average of 3,624 & the frequency with error average of 0,407. When the supply of the main ( PLN ) disconnected or experiencing disorder; that can be observed of the value of voltage or the frequency of which do not meet the standards set by PLN and then ATS will command generator for starting and supplies the burden of taken over by generator in a pause of time during which 15 seconds. And when the supply of the main ( PLN ) back to normal then the supply of burden back taken over by PLN and a pause the time during which 10 seconds. ATS in this research are completed with an led light, and buzzer operating conditions, as an indicator of the failure of starting, and a disorder in generator. Keywords: Automatic Transfer Switch, Voltage, Frequency, Genset
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perancangan automatic Transfer Switch ats mode transisi open transition re Transfer dengan parameter transisi berupa tegangan dan frekuensi
Transient: Jurnal Ilmiah Teknik Elektro, 2014Co-Authors: Paul Henry Ginting, Tejo Sukmadi, Enda Wista SinurayaAbstract:Abstrak Kontiunitas Penyaluran energi listrik dari pusat pembangkit sampai ke konsumen tidak bisa dijamin tersedia setiap saat. Sehingga untuk konsumen yang membutuhkan jaminan ketersediaan energi listrik setiap saat, dibutuhkan suplai cadangan (Genset) yang mempunyai kapasitas yang cukup untuk menanggung semua beban di tempat tersebut apabila suplai dari jaringan listrik terputus. Penelitian ini menghasilkan Automatic Transfer Switch (ATS) yang mampu mengakuisisi data berupa tegangan dengan galat rata-rata sebesar 3,624 & Frekuensi dengan galat rata-rata sebesar 0,407. Ketika Suplai Utama (PLN) terputus atau mengalami gangguan , yang dapat diamati dari nilai Tegangan maupun Frekuensi yang tidak memenuhi standard yang ditetapkan oleh PLN, maka ATS akan memerintahkan Genset untuk starting dan suplai beban diambil alih oleh Genset dengan jeda waktu selama 15 detik. Dan ketika suplai utama (PLN) kembali normal maka suplai beban kembali diambil alih oleh PLN dengan jeda waktu selama 10 detik. ATS pada penelitian ini juga dilengkapi Lampu LED dan Buzzer sebagai indikator kondisi operasi, kegagalan starting, dan gangguan pada Genset. Kata kunci : Automatic Transfer Switch, Tegangan, Frekuensi, Genset Abstract Continuity distribution of electric energy from the center of power to the consumers cannot be guaranteed is available at any time. So as to consumers who need a guarantee the availability of electrical energy all the time, it takes the supply of reserves ( generator ) that has sufficient capacity to shouldered the entire burden on the spot when the supply of electricity cut off. This research produce automatic Transfer a Switch ( ATS ) capable of being acquired data in the form of voltage with error average of 3,624 & the frequency with error average of 0,407. When the supply of the main ( PLN ) disconnected or experiencing disorder; that can be observed of the value of voltage or the frequency of which do not meet the standards set by PLN and then ATS will command generator for starting and supplies the burden of taken over by generator in a pause of time during which 15 seconds. And when the supply of the main ( PLN ) back to normal then the supply of burden back taken over by PLN and a pause the time during which 10 seconds. ATS in this research are completed with an led light, and buzzer operating conditions, as an indicator of the failure of starting, and a disorder in generator. Keywords: Automatic Transfer Switch, Voltage, Frequency, Genset
