Pub Date : 2016-06-27DOI: 10.1109/IGBSG.2016.7539418
S. Hipwell, Matt Majedi
Birmingham City University (BCU) is in the 7th year of a 9 year new multi-campus development building scheme worth £250m. This paper discusses how technology-systems within the new campus buildings are being used to gather information on patterns of usage and in-turn shape services and target resources. Such systems include access-control, building management and power management systems, wireless-services and room-booking and student attendance monitoring systems. All of the buildings' systems previously mentioned are discussed within this paper; and the context and value of the data and information they provide and contribute to BCU's operations.
{"title":"Extracting business-intelligence from integrated building and environmental systems: A working model","authors":"S. Hipwell, Matt Majedi","doi":"10.1109/IGBSG.2016.7539418","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539418","url":null,"abstract":"Birmingham City University (BCU) is in the 7th year of a 9 year new multi-campus development building scheme worth £250m. This paper discusses how technology-systems within the new campus buildings are being used to gather information on patterns of usage and in-turn shape services and target resources. Such systems include access-control, building management and power management systems, wireless-services and room-booking and student attendance monitoring systems. All of the buildings' systems previously mentioned are discussed within this paper; and the context and value of the data and information they provide and contribute to BCU's operations.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125932546","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539430
Chia-Hui Wang, Chen-Kuei Yang, W. Liao, R. Chang, Tsao-Ta Wei
Apache Hadoop is the famous open source cloud computing software in recent years, the performance is much better than before due to lots of researchers' efforts, but its performance still has chance to be improved further because of unsatisfied distributed computing speed and slow response time from heterogeneous Internet's uncertain and dynamic environment. In this paper, coupling emerging GPU computing with multi-path TCP (MPTCP) protocol is proposed for current Hadoop/MapReduce architecture to further improve the distributed computing performance. We use GPU computing to speed up the Map's process, and use MPTCP to reduce Reduce's data transfer time. The Hadoop benchmark applications such as Terasort, WordCount and PiEstimate are applied to demonstrate the improved performance of our proposed scheme. According to the preliminary experimental results, the proposed scheme can improve the Hadoop/MapReduce performance by coupling GPU computing and MPTCP multipath protocol with robustness and bandwidth aggregation, to reduce further the distributed computing latency.
{"title":"Coupling GPU and MPTCP to improve Hadoop/MapReduce performance","authors":"Chia-Hui Wang, Chen-Kuei Yang, W. Liao, R. Chang, Tsao-Ta Wei","doi":"10.1109/IGBSG.2016.7539430","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539430","url":null,"abstract":"Apache Hadoop is the famous open source cloud computing software in recent years, the performance is much better than before due to lots of researchers' efforts, but its performance still has chance to be improved further because of unsatisfied distributed computing speed and slow response time from heterogeneous Internet's uncertain and dynamic environment. In this paper, coupling emerging GPU computing with multi-path TCP (MPTCP) protocol is proposed for current Hadoop/MapReduce architecture to further improve the distributed computing performance. We use GPU computing to speed up the Map's process, and use MPTCP to reduce Reduce's data transfer time. The Hadoop benchmark applications such as Terasort, WordCount and PiEstimate are applied to demonstrate the improved performance of our proposed scheme. According to the preliminary experimental results, the proposed scheme can improve the Hadoop/MapReduce performance by coupling GPU computing and MPTCP multipath protocol with robustness and bandwidth aggregation, to reduce further the distributed computing latency.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126718500","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539438
K. Phaebua, T. Lertwiriyaprapa, S. Chalermwisutkul, P. Akkaraekthalin
Multiple power repeater coil antennas for coverage area extension of a wireless battery charging system are presented in this paper. The low-profile repeater coil is simply constructed using a copper wire and a capacitor. The transmitter resonant coil (Tx), the repeater resonant coils (Rp) and the receiving resonant coil (Rx) are arranged in a planar configuration. Experiment results with two Rp coils are presented to demonstrate the charging range extension. The power transfer efficiency is investigated by the analysis of the scattering parameters of the system as a two-port network with a reference impedance of 50 Ohm. The operating frequency is chosen at 6.78 MHz according to the A4WP wireless battery charging standard. As the power source, a 10 Watt class-E RF generator circuit was used. The load coil which absorbs the energy via magnetic coupling from the Rx resonant coil is connected to a converter circuit which provides 5V constant DC voltage for battery charging of portable devices. The optimum impedance matching is considered for all coupling stages by optimizing the distance between the resonant coils. It is found that the charging area in the horizontal plane can be extended with the proposed multiple Rp coil antennas.
{"title":"Area extension of a wireless battery charging system using multiple power repeater coil antennas","authors":"K. Phaebua, T. Lertwiriyaprapa, S. Chalermwisutkul, P. Akkaraekthalin","doi":"10.1109/IGBSG.2016.7539438","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539438","url":null,"abstract":"Multiple power repeater coil antennas for coverage area extension of a wireless battery charging system are presented in this paper. The low-profile repeater coil is simply constructed using a copper wire and a capacitor. The transmitter resonant coil (Tx), the repeater resonant coils (Rp) and the receiving resonant coil (Rx) are arranged in a planar configuration. Experiment results with two Rp coils are presented to demonstrate the charging range extension. The power transfer efficiency is investigated by the analysis of the scattering parameters of the system as a two-port network with a reference impedance of 50 Ohm. The operating frequency is chosen at 6.78 MHz according to the A4WP wireless battery charging standard. As the power source, a 10 Watt class-E RF generator circuit was used. The load coil which absorbs the energy via magnetic coupling from the Rx resonant coil is connected to a converter circuit which provides 5V constant DC voltage for battery charging of portable devices. The optimum impedance matching is considered for all coupling stages by optimizing the distance between the resonant coils. It is found that the charging area in the horizontal plane can be extended with the proposed multiple Rp coil antennas.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159267","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539414
Zhilong Yang, Shin-Ming Cheng, Yueh Jir Wang
Due to the increasing demand for local wireless transmissions from proximity-based social or local-content sharing applications, direct communication between user equipment (UE), known as device-to-device (D2D) communication, is regarded as a key technology component in LTE-Advanced. Taking the advantages of short transmission distance, D2D transmission increases resource utilization as well as reduces transmission delay and power consumption. However, the introduction of D2D communication incurs extra interference to the UEs who make the traditional cellular connection with the base station (BS), which shall be carefully considered. This paper, therefore, investigates the very beginning and fundamental problem in D2D communications underlaying cellular network, that is, either establishing local D2D communications or make a traditional communication with BS. A novel mode selection mechanism is proposed to control the number of UEs performing D2D communications to achieve maximum average transmit data rate. We apply the recent innovation, stochastic geometry, to analyze the performance of the proposed mode selection mechanism. By including the realistic feature in cellular network, that is, UEs will associate the closet BS, a Poisson-Voronoi tessellation is comprised. We further derive a tractable result on tradeoff between link reliability and data rate. As a result, this work serves as a powerful and efficient tool for analyzing the effects of D2D mode selection.
{"title":"Mode selection for device-to-device communications with Voronoi tessellation","authors":"Zhilong Yang, Shin-Ming Cheng, Yueh Jir Wang","doi":"10.1109/IGBSG.2016.7539414","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539414","url":null,"abstract":"Due to the increasing demand for local wireless transmissions from proximity-based social or local-content sharing applications, direct communication between user equipment (UE), known as device-to-device (D2D) communication, is regarded as a key technology component in LTE-Advanced. Taking the advantages of short transmission distance, D2D transmission increases resource utilization as well as reduces transmission delay and power consumption. However, the introduction of D2D communication incurs extra interference to the UEs who make the traditional cellular connection with the base station (BS), which shall be carefully considered. This paper, therefore, investigates the very beginning and fundamental problem in D2D communications underlaying cellular network, that is, either establishing local D2D communications or make a traditional communication with BS. A novel mode selection mechanism is proposed to control the number of UEs performing D2D communications to achieve maximum average transmit data rate. We apply the recent innovation, stochastic geometry, to analyze the performance of the proposed mode selection mechanism. By including the realistic feature in cellular network, that is, UEs will associate the closet BS, a Poisson-Voronoi tessellation is comprised. We further derive a tractable result on tradeoff between link reliability and data rate. As a result, this work serves as a powerful and efficient tool for analyzing the effects of D2D mode selection.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125605841","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539427
Július Bemš, T. Králík, J. Knápek, Anna Kradeckaia
The aim of this paper is to introduce methods of solution regarding current issues of electricity markets integration in Europe. The focus is pointed on bidding zones overview and bidding zones reconfiguration process in general, meantime the situation in central Europe will be analysed more deeply. Bidding zone can be defined as an area without internal business congestion. It means that transaction can be completed between any two points inside this area and electricity can be transferred without requirement of transmission capacity allocation. Bidding zones borders in many countries are the same as the political borders because countries were more isolated in the past than in present time. This situation is changing with the increase of international cooperation. Countries like Czech Republic, Slovakia, Poland, Hungary and France are examples of bidding zones that are identical with political borders. On the other hand, there is a single bidding zone that includes Germany, Austria and Luxembourg (DE-AT-LU). The most scrutinous issue of bidding zones configuration covers DE-AT-LU zone where the problems with internal congestion occur and correspondingly affect surrounding bidding zones, especially Czech Republic and Poland. Transmission capacities inside this zone are insufficient. Electricity flows through neighbouring grids and constrains transmission capacities for local market participants. This article presents criteria that might be used for bidding zones reconfiguration with the main accent on social welfare concept applicability. Social welfare is a wide term which is investigated in this paper under bidding zones reconfiguration problem.
{"title":"Bidding zones reconfiguration — Current issues literature review, criterions and social welfare","authors":"Július Bemš, T. Králík, J. Knápek, Anna Kradeckaia","doi":"10.1109/IGBSG.2016.7539427","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539427","url":null,"abstract":"The aim of this paper is to introduce methods of solution regarding current issues of electricity markets integration in Europe. The focus is pointed on bidding zones overview and bidding zones reconfiguration process in general, meantime the situation in central Europe will be analysed more deeply. Bidding zone can be defined as an area without internal business congestion. It means that transaction can be completed between any two points inside this area and electricity can be transferred without requirement of transmission capacity allocation. Bidding zones borders in many countries are the same as the political borders because countries were more isolated in the past than in present time. This situation is changing with the increase of international cooperation. Countries like Czech Republic, Slovakia, Poland, Hungary and France are examples of bidding zones that are identical with political borders. On the other hand, there is a single bidding zone that includes Germany, Austria and Luxembourg (DE-AT-LU). The most scrutinous issue of bidding zones configuration covers DE-AT-LU zone where the problems with internal congestion occur and correspondingly affect surrounding bidding zones, especially Czech Republic and Poland. Transmission capacities inside this zone are insufficient. Electricity flows through neighbouring grids and constrains transmission capacities for local market participants. This article presents criteria that might be used for bidding zones reconfiguration with the main accent on social welfare concept applicability. Social welfare is a wide term which is investigated in this paper under bidding zones reconfiguration problem.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"65 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130942681","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539425
J. Knápek, R. Haas
In recent years, renewable energy sources (RES) enormously increased their contribution to energy mix of EU member states and esp. power generation based on RES utilization enormously expanded. Feed-in tariff scheme has been widely used instrument of support till now. Massive growth of RES power generation in combination with RES support scheme has significant impact to the power market and the effectiveness of its functioning. Present way of RES support has sheltered the RES from market price signals and they were and still they are operated irrespective the real demand for the electricity. In contrary, present way of RES support in connection with the logic of "energy only market" has led to the significant changes in power supply curve (merit order effect). Development of RES power generation also resulted in enormous increase of extra cost related with RES support.
{"title":"New challenges in RES support","authors":"J. Knápek, R. Haas","doi":"10.1109/IGBSG.2016.7539425","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539425","url":null,"abstract":"In recent years, renewable energy sources (RES) enormously increased their contribution to energy mix of EU member states and esp. power generation based on RES utilization enormously expanded. Feed-in tariff scheme has been widely used instrument of support till now. Massive growth of RES power generation in combination with RES support scheme has significant impact to the power market and the effectiveness of its functioning. Present way of RES support has sheltered the RES from market price signals and they were and still they are operated irrespective the real demand for the electricity. In contrary, present way of RES support in connection with the logic of \"energy only market\" has led to the significant changes in power supply curve (merit order effect). Development of RES power generation also resulted in enormous increase of extra cost related with RES support.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115732204","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539443
H. Hsu, Wei-En Chang
This work demonstrates a fully integrated 24 GHz CMOS receiver for high gain and wireless sensor network. The receiver incorporates a low noise amplifier, double-balanced mixer and an active balun for single to differential. This mixer designs with active load to decrease power dissipation. To increase mixer gain, an inductor is added to eliminate parasitic capacitances at the load of input transistor. The fabricated chip has been implemented in a 0.18 μm CMOS technology. The measurement shows that the receiver demonstrates following performances: power conversion gain of 35 dB at 23.5GHz, noise figure of 7.6 dB, input power at 1 dB compression point of -38 dBm and IIP3 of -29 dBm. The receiver chip consumes 57.84mW from a 1.8 V power supply, the dissipated power is with 25.56mW for the LNA, 22.68mW for the active balun, 9.6mW for the mixer and output IF buffer.
{"title":"High conversion gain receiver for wireless sensor network","authors":"H. Hsu, Wei-En Chang","doi":"10.1109/IGBSG.2016.7539443","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539443","url":null,"abstract":"This work demonstrates a fully integrated 24 GHz CMOS receiver for high gain and wireless sensor network. The receiver incorporates a low noise amplifier, double-balanced mixer and an active balun for single to differential. This mixer designs with active load to decrease power dissipation. To increase mixer gain, an inductor is added to eliminate parasitic capacitances at the load of input transistor. The fabricated chip has been implemented in a 0.18 μm CMOS technology. The measurement shows that the receiver demonstrates following performances: power conversion gain of 35 dB at 23.5GHz, noise figure of 7.6 dB, input power at 1 dB compression point of -38 dBm and IIP3 of -29 dBm. The receiver chip consumes 57.84mW from a 1.8 V power supply, the dissipated power is with 25.56mW for the LNA, 22.68mW for the active balun, 9.6mW for the mixer and output IF buffer.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123897352","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539437
Poki Chen, Ya-Yun Hsiao, Y. Chung
As a traditional digital platform, Field Programmable Gate Array (FPGA) is seldom used for analog applications. Since there is no way to fine tune the gate property or circuit structure, the performance of FPGA analog application is usually inferior to its counterparts based on full-custom or even cell-based design. Nevertheless, a high performance FPGA time-to-digital Converter (TDC) is proposed in this paper to expand the FPGA territory into high-end analog applications. The test time signal is sampled by a serious timing references generated by feeding the original clock into a tapped delay line. According to periodicity, the delays among those timing references are wrapped into a single reference period and the effective TDC resolution can be made much smaller than the clock period to compete even with the state-of the art full-custom TDCs in performance. After measurement, the effective resolution is as fine as 2.5 ps. The corresponding differential nonlinearity (DNL) is -1.90~1.66 LSB and the integral nonlinearity (INL) is -3.79~6.53 LSB only.
{"title":"A high resolution FPGA TDC converter with 2.5 ps bin size and −3.79∼6.53 LSB integral nonlinearity","authors":"Poki Chen, Ya-Yun Hsiao, Y. Chung","doi":"10.1109/IGBSG.2016.7539437","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539437","url":null,"abstract":"As a traditional digital platform, Field Programmable Gate Array (FPGA) is seldom used for analog applications. Since there is no way to fine tune the gate property or circuit structure, the performance of FPGA analog application is usually inferior to its counterparts based on full-custom or even cell-based design. Nevertheless, a high performance FPGA time-to-digital Converter (TDC) is proposed in this paper to expand the FPGA territory into high-end analog applications. The test time signal is sampled by a serious timing references generated by feeding the original clock into a tapped delay line. According to periodicity, the delays among those timing references are wrapped into a single reference period and the effective TDC resolution can be made much smaller than the clock period to compete even with the state-of the art full-custom TDCs in performance. After measurement, the effective resolution is as fine as 2.5 ps. The corresponding differential nonlinearity (DNL) is -1.90~1.66 LSB and the integral nonlinearity (INL) is -3.79~6.53 LSB only.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"269 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121353350","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539454
B. Lin, Sheng-Zhi Zhang
In this paper, the modular multilevel dc/dc converters, by integrating the full-bridge converters in series, are provided for high power and high voltage dc-based systems. Each circuit module includes a full-bridge converter and a half-bridge LLC resonant converter to implement the wide range of soft switching and low conduction losses. The ZVS condition of the power switches at the leading leg is implemented by the energy stored on the output inductor. The ZVS condition of power switches at the lagging leg is implemented by the LLC resonant converter. Therefore, all switches can be turned on at ZVS from light load. A passive snubber is adopted on the secondary side of full-bridge converter to reduce the conduction loss during the freewheeling interval especially at high input voltage and full load conditions. The outputs of the full-bridge converter and resonant converter are series connection. Therefore, energy is transferred by both converters at whole switching period. Two circuit modules are connected input-series and output-parallel to effectively limit the voltage rating of switches at Vin/2. Flying capacitor is adopted in the proposed circuit to balance input voltages in each switching cycle without the complexity control scheme. Finally, Experiments with a 1920W prototype are provided to demonstrate the performance of the proposed circuit.
{"title":"Implementation of a modular full-bridge DC/DC converter","authors":"B. Lin, Sheng-Zhi Zhang","doi":"10.1109/IGBSG.2016.7539454","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539454","url":null,"abstract":"In this paper, the modular multilevel dc/dc converters, by integrating the full-bridge converters in series, are provided for high power and high voltage dc-based systems. Each circuit module includes a full-bridge converter and a half-bridge LLC resonant converter to implement the wide range of soft switching and low conduction losses. The ZVS condition of the power switches at the leading leg is implemented by the energy stored on the output inductor. The ZVS condition of power switches at the lagging leg is implemented by the LLC resonant converter. Therefore, all switches can be turned on at ZVS from light load. A passive snubber is adopted on the secondary side of full-bridge converter to reduce the conduction loss during the freewheeling interval especially at high input voltage and full load conditions. The outputs of the full-bridge converter and resonant converter are series connection. Therefore, energy is transferred by both converters at whole switching period. Two circuit modules are connected input-series and output-parallel to effectively limit the voltage rating of switches at Vin/2. Flying capacitor is adopted in the proposed circuit to balance input voltages in each switching cycle without the complexity control scheme. Finally, Experiments with a 1920W prototype are provided to demonstrate the performance of the proposed circuit.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114147282","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 : 2016-06-27DOI: 10.1109/IGBSG.2016.7539421
Jung-Te Huang, S. Ruan, Jong-Woei Whang
Sunlight is one of the important elements for creatures' survival and growth. Due to the change of lifestyle, people spend about 90 % of time staying in buildings. Recently, the artificial indoor illumination gradually replaces the sunlight in human beings' life. This condition may lead to exhaustion, osteoporosis, depression, inability of concentration, and other symptoms if people cannot be exposed to enough sunlight. To solve this problem, this paper proposes an Intelligent Natural Light Illumination System. This illumination system can take people's health and environmental protection into account. This system can divide into four parts: light collecting, light transmitting, light emitting, and auxiliary lighting. When the sunlight is enough, the lighting system can guide the sunlight into the building for lighting applications. The auxiliary lighting subsystem would control the LED to satisfy the users' demand when the brightness of the environment could not achieve the desired results. After that, it can let the sunlight indoors and improve the quality of human's life at the same time.
{"title":"Intelligent natural light illumination system","authors":"Jung-Te Huang, S. Ruan, Jong-Woei Whang","doi":"10.1109/IGBSG.2016.7539421","DOIUrl":"https://doi.org/10.1109/IGBSG.2016.7539421","url":null,"abstract":"Sunlight is one of the important elements for creatures' survival and growth. Due to the change of lifestyle, people spend about 90 % of time staying in buildings. Recently, the artificial indoor illumination gradually replaces the sunlight in human beings' life. This condition may lead to exhaustion, osteoporosis, depression, inability of concentration, and other symptoms if people cannot be exposed to enough sunlight. To solve this problem, this paper proposes an Intelligent Natural Light Illumination System. This illumination system can take people's health and environmental protection into account. This system can divide into four parts: light collecting, light transmitting, light emitting, and auxiliary lighting. When the sunlight is enough, the lighting system can guide the sunlight into the building for lighting applications. The auxiliary lighting subsystem would control the LED to satisfy the users' demand when the brightness of the environment could not achieve the desired results. After that, it can let the sunlight indoors and improve the quality of human's life at the same time.","PeriodicalId":348843,"journal":{"name":"2016 2nd International Conference on Intelligent Green Building and Smart Grid (IGBSG)","volume":"968 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134055543","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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