Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351805
Jae-Kuk Kim, Seong-Wook Choi, G. Moon
A new multi-output forward (MOFC) converter is proposed. It consists of four synchronous switches in secondary side for two outputs. The primary switches control the main output voltage and the synchronous switch in transformer secondary side controls the auxiliary output voltage. The main advantages of the proposed converter are that the secondary switch can achieve the zero voltage switching (ZVS) at entire load conditions and the secondary rectified voltage is a three level waveform, which can reduce the output filter. The operational principle, analysis and design considerations of the proposed converter are presented in this paper. The validity of this study is confirmed by the experimental results from dual outputs (12V-18.3A and 5V-6A) prototype for PC power supply.
{"title":"Zero-voltage switching multi-output forward converter","authors":"Jae-Kuk Kim, Seong-Wook Choi, G. Moon","doi":"10.1109/INTLEC.2009.5351805","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351805","url":null,"abstract":"A new multi-output forward (MOFC) converter is proposed. It consists of four synchronous switches in secondary side for two outputs. The primary switches control the main output voltage and the synchronous switch in transformer secondary side controls the auxiliary output voltage. The main advantages of the proposed converter are that the secondary switch can achieve the zero voltage switching (ZVS) at entire load conditions and the secondary rectified voltage is a three level waveform, which can reduce the output filter. The operational principle, analysis and design considerations of the proposed converter are presented in this paper. The validity of this study is confirmed by the experimental results from dual outputs (12V-18.3A and 5V-6A) prototype for PC power supply.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128375659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352090
Doyoon Kim, Young Park, Sang Bin Lee, Hosung Jung
This paper is focused on implementing an online monitoring system that checks power facility status by applying network based technology to Urban Transit substation power facilities and the results of its on-field tests. This system is composed of a sensor part, a measurement part, a transceiver part, a host computer, and a power source part. The system is designed to collect, save, analyze, and display the online state power facility AI (Analog Input). This system measures voltage and current from positive feeders and negative feeders where it is possible to check abnormalities of the substation's main power facilities such as transformers, circuit breakers, and rectifiers. By monitoring abnormal data of the Urban Transit power facilities real-time and analyzing stored data, establishing procedures of optimized maintenance is possible.
{"title":"Implementation of a network-based online monitoring system for substation power facilities in Urban Rail Transit","authors":"Doyoon Kim, Young Park, Sang Bin Lee, Hosung Jung","doi":"10.1109/INTLEC.2009.5352090","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352090","url":null,"abstract":"This paper is focused on implementing an online monitoring system that checks power facility status by applying network based technology to Urban Transit substation power facilities and the results of its on-field tests. This system is composed of a sensor part, a measurement part, a transceiver part, a host computer, and a power source part. The system is designed to collect, save, analyze, and display the online state power facility AI (Analog Input). This system measures voltage and current from positive feeders and negative feeders where it is possible to check abnormalities of the substation's main power facilities such as transformers, circuit breakers, and rectifiers. By monitoring abnormal data of the Urban Transit power facilities real-time and analyzing stored data, establishing procedures of optimized maintenance is possible.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131089842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351930
Taeuk Jung, Juyong Kim, Cheol Choi
This paper studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge Converter to convert input voltage, 24V, into out voltage, 270V, was realized through applying phase shift angle control so as to manage electric power and voltage in the output side. The advantages of the converter system suggested are the low cost as well as current stress reduction, high efficiency, reliability, and simplified maintenance. It is also found that the system is highly useful to produce household electric power.
{"title":"Design of low cost power Converter system for fuel cell","authors":"Taeuk Jung, Juyong Kim, Cheol Choi","doi":"10.1109/INTLEC.2009.5351930","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351930","url":null,"abstract":"This paper studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge Converter to convert input voltage, 24V, into out voltage, 270V, was realized through applying phase shift angle control so as to manage electric power and voltage in the output side. The advantages of the converter system suggested are the low cost as well as current stress reduction, high efficiency, reliability, and simplified maintenance. It is also found that the system is highly useful to produce household electric power.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130865398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351877
Won-suk Choi, S. Young, Dong-wook Kim
The trend in telecom power supplies is towards increasing power density. The drive for high power density in switch mode power supplies is pushing high switching frequency. This increase in switching frequency is limited by switching losses. To minimize switching loss, soft switching techniques such as zero voltage switching (ZVS) or zero current switching (ZCS) are adapted for high switching frequency converters. LLC resonant half bridge converters become essential topology for greater efficiency and lower profile in switching power supplies. Nowadays, it is widely accepted for telecom power supplies due to many advantages. However, many power MOSFET failures are reported on LLC resonant converter. This paper analyzes failure operation modes and mechanisms of power MOSFETs in LLC resonant converters and shows root cause of the failures. A solution for these failure modes is proposed to improve the system reliability.
{"title":"Analysis of MOSFET failure modes in LLC resonant converter","authors":"Won-suk Choi, S. Young, Dong-wook Kim","doi":"10.1109/INTLEC.2009.5351877","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351877","url":null,"abstract":"The trend in telecom power supplies is towards increasing power density. The drive for high power density in switch mode power supplies is pushing high switching frequency. This increase in switching frequency is limited by switching losses. To minimize switching loss, soft switching techniques such as zero voltage switching (ZVS) or zero current switching (ZCS) are adapted for high switching frequency converters. LLC resonant half bridge converters become essential topology for greater efficiency and lower profile in switching power supplies. Nowadays, it is widely accepted for telecom power supplies due to many advantages. However, many power MOSFET failures are reported on LLC resonant converter. This paper analyzes failure operation modes and mechanisms of power MOSFETs in LLC resonant converters and shows root cause of the failures. A solution for these failure modes is proposed to improve the system reliability.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131745704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352011
Yuang-Shung Lee, Cheng-Hsiung Chiang
In recently years, high speed digital circuit equipment and products with electrostatic discharge (ESD) issues have become crucial due to tighter rise time and smaller geometry spacing. A typical ESD trouble shooting case is discussed involving a personal computer system followed with plain analysis to confirm the ESD interference path in a complex system. Further analysis studies several printed circuit board (PCB) structure traces relative to crosstalk. The target ESD immunity is then increased up from ±4kV to ±6kV contact discharge for the margin design to ensure the improved effect using a novel technique in this evaluated system. The simulation result is verified to be in good agreement with the measurement result.
{"title":"Investigation of effectiveness of split image plane for ESD immunity in system level","authors":"Yuang-Shung Lee, Cheng-Hsiung Chiang","doi":"10.1109/INTLEC.2009.5352011","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352011","url":null,"abstract":"In recently years, high speed digital circuit equipment and products with electrostatic discharge (ESD) issues have become crucial due to tighter rise time and smaller geometry spacing. A typical ESD trouble shooting case is discussed involving a personal computer system followed with plain analysis to confirm the ESD interference path in a complex system. Further analysis studies several printed circuit board (PCB) structure traces relative to crosstalk. The target ESD immunity is then increased up from ±4kV to ±6kV contact discharge for the margin design to ensure the improved effect using a novel technique in this evaluated system. The simulation result is verified to be in good agreement with the measurement result.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121291764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352034
Ho Lee, Min-Jung Lee, Se-Na Lee, Hwa-chun Lee, H. Nam, Sung‐Jun Park
This paper introduces the photovoltaic (PV) simulator for the inverter of PV energy system. In order to embody the PV simulator, the conventional solar cell is numerically modeled based on the one-diode equivalent circuit. With the P-V relationships, we find the maximum and minimum power which is needed during the inverter performs the MPPT algorithm and design the parameter based on the maximum and minimum power. Finally, this paper verifies design parameters numerically through the PSIM and analyzes the PV simulator in the frequency domain using matlab.
{"title":"Development of photovoltaic simulator based on DC-DC converter","authors":"Ho Lee, Min-Jung Lee, Se-Na Lee, Hwa-chun Lee, H. Nam, Sung‐Jun Park","doi":"10.1109/INTLEC.2009.5352034","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352034","url":null,"abstract":"This paper introduces the photovoltaic (PV) simulator for the inverter of PV energy system. In order to embody the PV simulator, the conventional solar cell is numerically modeled based on the one-diode equivalent circuit. With the P-V relationships, we find the maximum and minimum power which is needed during the inverter performs the MPPT algorithm and design the parameter based on the maximum and minimum power. Finally, this paper verifies design parameters numerically through the PSIM and analyzes the PV simulator in the frequency domain using matlab.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123077005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351771
Hak-Man Kim, Tetsuo Kinoshita
A Microgrid is a small scale power system consist of distributed small power facilities such as solar power generators, wind power generators and micro-turbine cogenerators. Because of some merits such as an eco-friendly system, good quality power supply and energy security, the Microgrid has been researched and encouraged actively in many countries. For commercialization, the effective operation for the Microgrid is very important. But because the ownership of each participant of a Microgrid is different in general, the effective operation of the Microgrid is not simple. In this paper, we introduce a power market model for the effective operation of the Microgrid, and propose an agent-based operation mechanism on a power market environment and a multiagent system for the Microgrid is designed based on the proposed mechanism. To verify effectiveness of the proposed mechanism, the multiagent system is implemented, simulated and evaluated on an operation situation using the multiagent platform.
{"title":"Multiagent system for Microgrid operation based on power market environment","authors":"Hak-Man Kim, Tetsuo Kinoshita","doi":"10.1109/INTLEC.2009.5351771","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351771","url":null,"abstract":"A Microgrid is a small scale power system consist of distributed small power facilities such as solar power generators, wind power generators and micro-turbine cogenerators. Because of some merits such as an eco-friendly system, good quality power supply and energy security, the Microgrid has been researched and encouraged actively in many countries. For commercialization, the effective operation for the Microgrid is very important. But because the ownership of each participant of a Microgrid is different in general, the effective operation of the Microgrid is not simple. In this paper, we introduce a power market model for the effective operation of the Microgrid, and propose an agent-based operation mechanism on a power market environment and a multiagent system for the Microgrid is designed based on the proposed mechanism. To verify effectiveness of the proposed mechanism, the multiagent system is implemented, simulated and evaluated on an operation situation using the multiagent platform.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123129210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351736
Woosup Kim, Seoungwoon Lee, S. Chae, B. Cho
In this paper, a half-bridge LCC high voltage converter with integrated magnetics is proposed. The resonant tank is formed with high conversion ratio transformer in one core, resulting in cost effectiveness. Using IGBT, operation in below resonant frequency with hybrid soft start method are suggested. The design guideline of the integrated magnetic component and controller in below resonant frequency operation is described. 13kV prototype hardware verifies the proposed converter operation.
{"title":"IGBT based high voltage converter with integrated magnetics","authors":"Woosup Kim, Seoungwoon Lee, S. Chae, B. Cho","doi":"10.1109/INTLEC.2009.5351736","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351736","url":null,"abstract":"In this paper, a half-bridge LCC high voltage converter with integrated magnetics is proposed. The resonant tank is formed with high conversion ratio transformer in one core, resulting in cost effectiveness. Using IGBT, operation in below resonant frequency with hybrid soft start method are suggested. The design guideline of the integrated magnetic component and controller in below resonant frequency operation is described. 13kV prototype hardware verifies the proposed converter operation.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126264901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351763
Toshiro Hirose, H. Matsuo, Y. Ishizuka
In this paper, the optimum control technology of an independent type of hybrid power system with wind and solar power generation, which enables a stable power supply to the loads, proposed and developed. This system comprises wind power generation inverter, solar power generation inverter, bidirectional inverter for storage batteries, and engine generator. Each inverter is connected with engine generator in parallel, and is operated under redundant mode.
{"title":"Development of an independent type of hybrid power generation system","authors":"Toshiro Hirose, H. Matsuo, Y. Ishizuka","doi":"10.1109/INTLEC.2009.5351763","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351763","url":null,"abstract":"In this paper, the optimum control technology of an independent type of hybrid power system with wind and solar power generation, which enables a stable power supply to the loads, proposed and developed. This system comprises wind power generation inverter, solar power generation inverter, bidirectional inverter for storage batteries, and engine generator. Each inverter is connected with engine generator in parallel, and is operated under redundant mode.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126296127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351956
Jong-Soo Kim, Jung-Min Ko, Byoung-Kuk Lee, Hyosil Lee, T. Lee, Jae-Sun Shim
In this paper, in order to design an optimal battery for fuel cell electric vehicles (FCEVs), nonlinear and dynamic characteristics of fuel cell are modeled. And practical driving profile is adopted to analyze required energy from FCEVs. Through this model, co-simulation of fuel cell source and practical load is then performed. And optimal battery design methodology is provided.
{"title":"Optimal battery design of FCEV using a fuel cell dynamics model","authors":"Jong-Soo Kim, Jung-Min Ko, Byoung-Kuk Lee, Hyosil Lee, T. Lee, Jae-Sun Shim","doi":"10.1109/INTLEC.2009.5351956","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351956","url":null,"abstract":"In this paper, in order to design an optimal battery for fuel cell electric vehicles (FCEVs), nonlinear and dynamic characteristics of fuel cell are modeled. And practical driving profile is adopted to analyze required energy from FCEVs. Through this model, co-simulation of fuel cell source and practical load is then performed. And optimal battery design methodology is provided.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122261280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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