Pub Date : 2015-10-01DOI: 10.1109/INTLEC.2015.7572350
HeungGyoon Harry Choi, Kyu-Sun Chung, Ge Li
With a growing concern over environmental issues, smaller and more energy efficient electronic devices continue to draw attention. Usually, high frequency has more advantages in making switching power smaller. A number of suppliers have already launched single-output power (single or double-digit W) which can be operated in high frequency (higher than 500kHz.) Despite increasing demand for multi-output high-capacity power, it is not easy to operate this power in high frequency. Reducing the loss of both switching components and transformer winding holds great significance in high frequency operation. This abstract is written to suggest a new transformer structure for multi-output (300W) high-frequency (500kHz) operation as well as present mathematical analysis and test results on the loss of transformer winding operated in high frequency. This suggestion can lead to approximately 40% of transformer size reduction compared to the existing one operated in 100kHz.
{"title":"Analysis on the loss of hybrid transformer winding for multi-output high frequency (300W) LLC resonance converters","authors":"HeungGyoon Harry Choi, Kyu-Sun Chung, Ge Li","doi":"10.1109/INTLEC.2015.7572350","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572350","url":null,"abstract":"With a growing concern over environmental issues, smaller and more energy efficient electronic devices continue to draw attention. Usually, high frequency has more advantages in making switching power smaller. A number of suppliers have already launched single-output power (single or double-digit W) which can be operated in high frequency (higher than 500kHz.) Despite increasing demand for multi-output high-capacity power, it is not easy to operate this power in high frequency. Reducing the loss of both switching components and transformer winding holds great significance in high frequency operation. This abstract is written to suggest a new transformer structure for multi-output (300W) high-frequency (500kHz) operation as well as present mathematical analysis and test results on the loss of transformer winding operated in high frequency. This suggestion can lead to approximately 40% of transformer size reduction compared to the existing one operated in 100kHz.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116901206","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572313
S. Hamasaki, Hirotaka Fukuda, Yoshihiro Yano, M. Tsuji
Renewable energy system such as a photovoltaic, a wind turbine generation and fuel cell has attracted attention as alternative energy sources of fossil fuel. However, a distributed generating system with the photovoltaic or the wind turbine generation is difficult to obtain a constant power supply. Thus control of power leveling system is required to maintain the balance of power flow for irregular power generation. The system is required to respond to change of voltage balance and bidirectional power flow of charge or discharge. Therefore the bidirectional buck/boost DC/DC converter with an electric double layer capacitor (EDLC) is applied for the control of PL system in this research. And the deadbeat control is applied to the system for obtaining quick and accurate response. This paper discusses the effectiveness of deadbeat control for power leveling unit by experiment.
{"title":"Deadbeat control of power leveling system with EDLC","authors":"S. Hamasaki, Hirotaka Fukuda, Yoshihiro Yano, M. Tsuji","doi":"10.1109/INTLEC.2015.7572313","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572313","url":null,"abstract":"Renewable energy system such as a photovoltaic, a wind turbine generation and fuel cell has attracted attention as alternative energy sources of fossil fuel. However, a distributed generating system with the photovoltaic or the wind turbine generation is difficult to obtain a constant power supply. Thus control of power leveling system is required to maintain the balance of power flow for irregular power generation. The system is required to respond to change of voltage balance and bidirectional power flow of charge or discharge. Therefore the bidirectional buck/boost DC/DC converter with an electric double layer capacitor (EDLC) is applied for the control of PL system in this research. And the deadbeat control is applied to the system for obtaining quick and accurate response. This paper discusses the effectiveness of deadbeat control for power leveling unit by experiment.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128223976","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572270
M. Caruso, R. Miceli, P. Romano, G. Schettino, C. Spataro, F. Viola
This paper presents a real-time monitoring system for PV power plants based on a microcontroller Atmega328P-PU. The proposed system, whose performances can be relatively close to those achieved with commercial monitoring systems, is simple, low-cost and open source technology-based. In addition, a user interface, capable to communicate through a wireless network by using a standard communication protocol IEEE 802.15.1, is here presented. From the experimental tests described and discussed in this paper it is demonstrated that the proposed monitoring system provides, with adequate accuracy, all the information about the operating status of the PV plant, even during fault conditions.
{"title":"A low-cost, real-time monitoring system for PV plants based on ATmega 328P-PU microcontroller","authors":"M. Caruso, R. Miceli, P. Romano, G. Schettino, C. Spataro, F. Viola","doi":"10.1109/INTLEC.2015.7572270","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572270","url":null,"abstract":"This paper presents a real-time monitoring system for PV power plants based on a microcontroller Atmega328P-PU. The proposed system, whose performances can be relatively close to those achieved with commercial monitoring systems, is simple, low-cost and open source technology-based. In addition, a user interface, capable to communicate through a wireless network by using a standard communication protocol IEEE 802.15.1, is here presented. From the experimental tests described and discussed in this paper it is demonstrated that the proposed monitoring system provides, with adequate accuracy, all the information about the operating status of the PV plant, even during fault conditions.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128331524","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572293
Naoki Iwado, Akihiro Ohori, Nobuyuki Hattori, T. Funaki
In power electronics, Power Hardware-in-the-loop Simulation (PHILS) which consists of Hardware part and Digital Simulator part has attracted attention. This is the very useful tool to shorten development time and to simplify verification under complicated condition. However, it is known that instability is caused by the time delay between Digital Simulator and Hardware. This paper applies two methods to manage instability. One is model-base Smith method, and the other is the model-free Fictitious Reference Iterative Tuning (FRIT) method. Experimental results indicate that two methods are effective in compensating the time delay and stabilizing PHILS system.
在电力电子领域，由硬件部分和数字模拟器部分组成的电力硬件在环仿真(power Hardware- In -the-loop Simulation, PHILS)受到了广泛的关注。这是一个非常有用的工具，可以缩短开发时间，简化复杂条件下的验证。然而，已知的不稳定性是由数字模拟器和硬件之间的时间延迟引起的。本文采用两种方法来管理不稳定性。一种是基于模型的Smith方法，另一种是无模型虚拟参考迭代调谐(FRIT)方法。实验结果表明，两种方法都能有效地补偿系统的时滞，使系统稳定。
{"title":"Stabilization techniques of power hardware-in-the-loop simulation with time delay compensation","authors":"Naoki Iwado, Akihiro Ohori, Nobuyuki Hattori, T. Funaki","doi":"10.1109/INTLEC.2015.7572293","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572293","url":null,"abstract":"In power electronics, Power Hardware-in-the-loop Simulation (PHILS) which consists of Hardware part and Digital Simulator part has attracted attention. This is the very useful tool to shorten development time and to simplify verification under complicated condition. However, it is known that instability is caused by the time delay between Digital Simulator and Hardware. This paper applies two methods to manage instability. One is model-base Smith method, and the other is the model-free Fictitious Reference Iterative Tuning (FRIT) method. Experimental results indicate that two methods are effective in compensating the time delay and stabilizing PHILS system.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128357738","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}
This paper develops an integrated traffic-power control algorithm based on a previously proposed cellular networks study. A real-time battery bank state of charge (SOC) estimation technique is introduced using predicted renewable energy. The proposed approach allows the cellular networks system to be more resilient by increasing power supply availability and reducing the excessive discharges which cause the battery bank life reduction. With the aim of mostly powering a base station (BS) from photovoltaic (PV) systems, the newly proposed control algorithm is compared with the previous study based on SOC cumulative distribution function (CDF).
{"title":"Microgrids for base stations: Renewable energy prediction and battery bank management for effective state of charge control","authors":"Youngsung Kwon, A. Kwasinski, Andres Kwasinski","doi":"10.15781/T2X05XC7T","DOIUrl":"https://doi.org/10.15781/T2X05XC7T","url":null,"abstract":"This paper develops an integrated traffic-power control algorithm based on a previously proposed cellular networks study. A real-time battery bank state of charge (SOC) estimation technique is introduced using predicted renewable energy. The proposed approach allows the cellular networks system to be more resilient by increasing power supply availability and reducing the excessive discharges which cause the battery bank life reduction. With the aim of mostly powering a base station (BS) from photovoltaic (PV) systems, the newly proposed control algorithm is compared with the previous study based on SOC cumulative distribution function (CDF).","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134111028","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572280
C. Chun, B. Cho, Joonhoon Kim
This paper proposes state-of-charge (SOC) and remaining charge estimation algorithm of each cell in series-connected lithium-ion batteries. SOC and remaining charge information are indicators for diagnosing cell-to-cell variation; thus, the proposed algorithm can be applied to SOC- or charge-based balancing in cell balancing controller. Compared to voltage-based balancing, SOC and remaining charge information improve the performance of balancing circuit but increase computational complexity which is a stumbling block in implementation. In this work, a simple current sensor-less SOC estimation algorithm with estimated current equalizer is used to achieve aforementioned object. To check the characteristics and validate the feasibility of the proposed method, a constant current discharging/charging profile is applied to a series-connected battery pack (twelve 2.6Ah Li-ion batteries). The experimental results show its applicability to SOC- and remaining charge-based balancing controller with high estimation accuracy.
{"title":"State-of-charge and remaining charge estimation of series-connected lithium-ion batteries for cell balancing scheme","authors":"C. Chun, B. Cho, Joonhoon Kim","doi":"10.1109/INTLEC.2015.7572280","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572280","url":null,"abstract":"This paper proposes state-of-charge (SOC) and remaining charge estimation algorithm of each cell in series-connected lithium-ion batteries. SOC and remaining charge information are indicators for diagnosing cell-to-cell variation; thus, the proposed algorithm can be applied to SOC- or charge-based balancing in cell balancing controller. Compared to voltage-based balancing, SOC and remaining charge information improve the performance of balancing circuit but increase computational complexity which is a stumbling block in implementation. In this work, a simple current sensor-less SOC estimation algorithm with estimated current equalizer is used to achieve aforementioned object. To check the characteristics and validate the feasibility of the proposed method, a constant current discharging/charging profile is applied to a series-connected battery pack (twelve 2.6Ah Li-ion batteries). The experimental results show its applicability to SOC- and remaining charge-based balancing controller with high estimation accuracy.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124333660","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572296
Jon Anderson, J. Frankhouser
The application benefits of operating stationary batteries in a partial state of charge (PSoC) can be significant. Emerging markets and applications which require dynamic cycling operation with high charge efficiency, such as, utility scale energy storage and hybrid telecommunications sites can especially benefit from this mode of operation. PSoC operation improves charge efficiency (up to 99%) and reduces the degradation of the components associated with overcharging the battery, such as, positive grid corrosion and electrolyte decomposition. Prior to recent advances in lead carbon technologies, the operation of a lead acid battery system in PSoC operation typically resulted in the rapid and unrecoverable loss of the batteries capacity due to sulfation of the negative electrode. However, with the modification of the battery with carbon technology, the stabilization of the negative against sulfation is possible and PSoC operation can become the preferred mode of operation for the lead carbon battery system. Furthermore, by engineering key properties of the positive and negative electrodes, the benefits can be significant without impacting other performance, safety and reliability characteristics of the battery.
{"title":"Advanced lead carbon batteries for partial state of charge operation in stationary applications","authors":"Jon Anderson, J. Frankhouser","doi":"10.1109/INTLEC.2015.7572296","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572296","url":null,"abstract":"The application benefits of operating stationary batteries in a partial state of charge (PSoC) can be significant. Emerging markets and applications which require dynamic cycling operation with high charge efficiency, such as, utility scale energy storage and hybrid telecommunications sites can especially benefit from this mode of operation. PSoC operation improves charge efficiency (up to 99%) and reduces the degradation of the components associated with overcharging the battery, such as, positive grid corrosion and electrolyte decomposition. Prior to recent advances in lead carbon technologies, the operation of a lead acid battery system in PSoC operation typically resulted in the rapid and unrecoverable loss of the batteries capacity due to sulfation of the negative electrode. However, with the modification of the battery with carbon technology, the stabilization of the negative against sulfation is possible and PSoC operation can become the preferred mode of operation for the lead carbon battery system. Furthermore, by engineering key properties of the positive and negative electrodes, the benefits can be significant without impacting other performance, safety and reliability characteristics of the battery.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125631784","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572334
S. Endo, Yasuki Kanazawa, Masayoshi Yamamoto
In this paper, an analytical expression for the DC bus harmonics on the input capacitor, caused by a three phase pulse width modulation (PWM) inverter of a high speed motor drive system, is derived. As the result, we found that the parasitic line inductance between the battery and the input capacitor, and the input capacitor are indirectly proportional. We can achieve the calculation method of the voltage ripple of the input capacitor including the parasitic components. Furthermore, the voltage ripple of the battery can be calculated by the switching function using the Bessel function.
{"title":"Analytical calculation of the voltage ripple on the input capacitor of the voltage-PWM inverter for high frequency operation","authors":"S. Endo, Yasuki Kanazawa, Masayoshi Yamamoto","doi":"10.1109/INTLEC.2015.7572334","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572334","url":null,"abstract":"In this paper, an analytical expression for the DC bus harmonics on the input capacitor, caused by a three phase pulse width modulation (PWM) inverter of a high speed motor drive system, is derived. As the result, we found that the parasitic line inductance between the battery and the input capacitor, and the input capacitor are indirectly proportional. We can achieve the calculation method of the voltage ripple of the input capacitor including the parasitic components. Furthermore, the voltage ripple of the battery can be calculated by the switching function using the Bessel function.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124224052","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572294
Jinwoo Jeong, Seung-Hee Ryu, Byoung-Kuk Lee, Heejun Kim
A foreign object detection has issued as a problem to be solved urgently on the wireless charging system of electric vehicles. In this paper, the tech tree of the foreign object detection in the view of patent in advanced American and Japanese companies is introduced.
{"title":"Tech tree study on foreign object detection technology in wireless charging system for electric vehicles","authors":"Jinwoo Jeong, Seung-Hee Ryu, Byoung-Kuk Lee, Heejun Kim","doi":"10.1109/INTLEC.2015.7572294","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572294","url":null,"abstract":"A foreign object detection has issued as a problem to be solved urgently on the wireless charging system of electric vehicles. In this paper, the tech tree of the foreign object detection in the view of patent in advanced American and Japanese companies is introduced.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127834028","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572314
S. Hamasaki, Takahiro Honda, M. Tsuji
The power conditioning system (PCS) is widely used as a grid connected inverter to keep output constant. A novel power conditioning system (PCS) using a circuit of modular multi-level converter (MMC) construction is investigated. The feature of the system is that output voltage becomes multilevel for low distortion and circuit has an energy storage system such as a battery or an electric double layer capacitor (EDLC). Thus it is convenient for the PV system of which input changes irregularly to apply the circuit with MMC structure. In this paper, the proposed novel PCS is introduced and the control method for the system is proposed. Effectiveness of the proposed PCS is considered by simulation.
{"title":"Novel circuit of power conditioning system with energy storage applying modular multilevel converter structure","authors":"S. Hamasaki, Takahiro Honda, M. Tsuji","doi":"10.1109/INTLEC.2015.7572314","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572314","url":null,"abstract":"The power conditioning system (PCS) is widely used as a grid connected inverter to keep output constant. A novel power conditioning system (PCS) using a circuit of modular multi-level converter (MMC) construction is investigated. The feature of the system is that output voltage becomes multilevel for low distortion and circuit has an energy storage system such as a battery or an electric double layer capacitor (EDLC). Thus it is convenient for the PV system of which input changes irregularly to apply the circuit with MMC structure. In this paper, the proposed novel PCS is introduced and the control method for the system is proposed. Effectiveness of the proposed PCS is considered by simulation.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127970961","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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