Pub Date : 2017-10-01DOI: 10.1109/INTLEC.2017.8211672
Shuguang Qi, Wenbo Sun, Yapan Wu
In this paper, different power supply systems in data center and telecom center including system architecture, energy efficiency, reliability, availability and maintainability are analyzed in detailed and aims to provide theoretical basis and researching data to get some conclusions and references for ICT infrastructure future research, and different application.
{"title":"Comparative analysis on different architectures of power supply system for data center and telecom center","authors":"Shuguang Qi, Wenbo Sun, Yapan Wu","doi":"10.1109/INTLEC.2017.8211672","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8211672","url":null,"abstract":"In this paper, different power supply systems in data center and telecom center including system architecture, energy efficiency, reliability, availability and maintainability are analyzed in detailed and aims to provide theoretical basis and researching data to get some conclusions and references for ICT infrastructure future research, and different application.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"799 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123006473","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214191
S. Ikeda, F. Kurokawa
Isolated DC-DC converters are widely used as the essential power conversion equipment in recent renewable energy systems. At the same time, such converters are expected for wide input voltage range and fault tolerance. This paper proposes an isolated boost full bridge DC-DC converter with a set of low loss active snubber circuits. To verify the feasibility of the proposed scheme, a 10 kW prototype was developed for three-phase PV inverter system. Experimental result confirms the proposed converter's high efficient operation at 280–500 V input and resilient operation along 100-0-100% load change.
{"title":"Boost full bridge DC-DC converter ensuring safe installation of PV energy in data center power management systems","authors":"S. Ikeda, F. Kurokawa","doi":"10.1109/INTLEC.2017.8214191","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214191","url":null,"abstract":"Isolated DC-DC converters are widely used as the essential power conversion equipment in recent renewable energy systems. At the same time, such converters are expected for wide input voltage range and fault tolerance. This paper proposes an isolated boost full bridge DC-DC converter with a set of low loss active snubber circuits. To verify the feasibility of the proposed scheme, a 10 kW prototype was developed for three-phase PV inverter system. Experimental result confirms the proposed converter's high efficient operation at 280–500 V input and resilient operation along 100-0-100% load change.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132100348","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214181
N. M. Mukhtar, D. Dah-Chuan Lu
This paper proposed a novel isolated bidirectional flyback converter integrated with two non-dissipative LC snubbers. In the proposed topology, the main flyback transformer and the LC snubbers are crossed-coupled to reduce current circulation and recycle the leakage energy. The proposed isolated bidirectional flyback converter can step-up the voltage of the battery (Vbat = 12V) to a high voltage side (VHV = 200V) for the load demand and vice versa. The main goal of this paper is to demonstrate the performances of this topology to achieve high voltage gain with less switching losses and reduce components stresses. The circuit analysis conferred in detail for Continuous Conduction Mode (CCM). Lastly, a laboratory prototype constructed to compare with simulation result.
{"title":"A bidirectional flyback converter with cross-coupled non-dissipative snubber circuits","authors":"N. M. Mukhtar, D. Dah-Chuan Lu","doi":"10.1109/INTLEC.2017.8214181","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214181","url":null,"abstract":"This paper proposed a novel isolated bidirectional flyback converter integrated with two non-dissipative LC snubbers. In the proposed topology, the main flyback transformer and the LC snubbers are crossed-coupled to reduce current circulation and recycle the leakage energy. The proposed isolated bidirectional flyback converter can step-up the voltage of the battery (Vbat = 12V) to a high voltage side (VHV = 200V) for the load demand and vice versa. The main goal of this paper is to demonstrate the performances of this topology to achieve high voltage gain with less switching losses and reduce components stresses. The circuit analysis conferred in detail for Continuous Conduction Mode (CCM). Lastly, a laboratory prototype constructed to compare with simulation result.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114268766","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214149
J. Badeda, Monika Kwiecien, D. Schulte, Timo Rüwald, D. Sauer
In stable electrical networks, such as the German one, the service of uninterruptible power supply (UPS) systems is only rarely called. Consequently the battery lifetime in this application is mostly restricted by calendar aging. The concept of multi-use describes here the delivery of additional services with a UPS during stable grid operation. The overall goal is to allocate the battery capacity and power according to the current state of health (SoH). Therefore, the Battery Steering and Management System (BSMS) was designed to allow for an optimal operation strategy over the full lifetime of a battery energy storage system (BESS). The BSMS combines a diagnostic unit with a management system that withholds an electrical and an aging model. The system is conceptualized to secure short term functionality as well as to predict long-term behavior and allow for operation planning. Over the lifetime of the battery the operation recommendation will adapt according to the battery's current status and its history. In addition, the paper presents briefly the basic concept of multi-use applications and the currently attractive markets for further services by a UPS.
{"title":"Adaptive battery steering and management system for the optimized operation of stationary battery energy storage systems in multi-use applications","authors":"J. Badeda, Monika Kwiecien, D. Schulte, Timo Rüwald, D. Sauer","doi":"10.1109/INTLEC.2017.8214149","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214149","url":null,"abstract":"In stable electrical networks, such as the German one, the service of uninterruptible power supply (UPS) systems is only rarely called. Consequently the battery lifetime in this application is mostly restricted by calendar aging. The concept of multi-use describes here the delivery of additional services with a UPS during stable grid operation. The overall goal is to allocate the battery capacity and power according to the current state of health (SoH). Therefore, the Battery Steering and Management System (BSMS) was designed to allow for an optimal operation strategy over the full lifetime of a battery energy storage system (BESS). The BSMS combines a diagnostic unit with a management system that withholds an electrical and an aging model. The system is conceptualized to secure short term functionality as well as to predict long-term behavior and allow for operation planning. Over the lifetime of the battery the operation recommendation will adapt according to the battery's current status and its history. In addition, the paper presents briefly the basic concept of multi-use applications and the currently attractive markets for further services by a UPS.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"780 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122627263","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214136
W. Fernando, D. Dah-Chuan Lu
This paper investigates into the power cable used in HFAC Power Distribution Systems (PDSs) and recommends new cable types that could be used to improve the performance. While using the same materials and trying not to increase the weight per unit length, the cross section of the cable has been modified to minimize the losses observed in HFAC applications. With higher operating frequencies, the skin effect of conductors dominate and the cable impedance increase exponentially, overcasting the benefits of using HFAC. Upto now, cables manufactured with DC ratings have been used in AC applications with various de-rating factors to account for the additional impedance. Although this approach has worked well with 50/60Hz applications, when extended to HFAC the PDSs become bulky and heavy, thus not effective and even question the benefits of using HFAC in PDSs. Therefore, a new approach of using different cross sections of cables for HFAC applications is proposed. Optimal sizes could be selected in accordance with manufacturing limitations leaving the fine adjustments to be made with the HFAC grid parameters for extracting the maximum benefits out of HFAC PDSs.
{"title":"Feasibility study on using pipe type cables and CoAxial cables for HFAC power distribution in data centre applications","authors":"W. Fernando, D. Dah-Chuan Lu","doi":"10.1109/INTLEC.2017.8214136","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214136","url":null,"abstract":"This paper investigates into the power cable used in HFAC Power Distribution Systems (PDSs) and recommends new cable types that could be used to improve the performance. While using the same materials and trying not to increase the weight per unit length, the cross section of the cable has been modified to minimize the losses observed in HFAC applications. With higher operating frequencies, the skin effect of conductors dominate and the cable impedance increase exponentially, overcasting the benefits of using HFAC. Upto now, cables manufactured with DC ratings have been used in AC applications with various de-rating factors to account for the additional impedance. Although this approach has worked well with 50/60Hz applications, when extended to HFAC the PDSs become bulky and heavy, thus not effective and even question the benefits of using HFAC in PDSs. Therefore, a new approach of using different cross sections of cables for HFAC applications is proposed. Optimal sizes could be selected in accordance with manufacturing limitations leaving the fine adjustments to be made with the HFAC grid parameters for extracting the maximum benefits out of HFAC PDSs.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122808382","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214150
Miki Ueshima, K. Yuasa, T. Babasaki
In this paper, we report on the results of controlling the state of charge (SOC) of batteries for back-up use by using weather forecasts in order to improve the self-consumption rate and store power for back-up. Regarding battery systems for utilizing variable renewable energy and back-up use, we suggest a method for charging and discharging batteries positively by changing the back-up capacity depending on weather forecasts. As a result, the energy self-consumption rate was improved by about 32%.
{"title":"Improving energy self-consumption rate by using weather forecasts in renewable energy system for back-up power supply","authors":"Miki Ueshima, K. Yuasa, T. Babasaki","doi":"10.1109/INTLEC.2017.8214150","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214150","url":null,"abstract":"In this paper, we report on the results of controlling the state of charge (SOC) of batteries for back-up use by using weather forecasts in order to improve the self-consumption rate and store power for back-up. Regarding battery systems for utilizing variable renewable energy and back-up use, we suggest a method for charging and discharging batteries positively by changing the back-up capacity depending on weather forecasts. As a result, the energy self-consumption rate was improved by about 32%.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122822418","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214167
Zhirong Cheng, Mingming Liu, Penchao Wang, Shaomin Zhang, Yundong Yang
For the input Conducted Emission in the rectifier with high efficiency and high power density, some common measures are very limited and cannot be used. In this, adopt some new measures and make the input Conducted Emission pass the test standard, all of the measures carried out are analyzed in detail.
{"title":"Research on input conducted emission for rectifier with high efficiency and high power density","authors":"Zhirong Cheng, Mingming Liu, Penchao Wang, Shaomin Zhang, Yundong Yang","doi":"10.1109/INTLEC.2017.8214167","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214167","url":null,"abstract":"For the input Conducted Emission in the rectifier with high efficiency and high power density, some common measures are very limited and cannot be used. In this, adopt some new measures and make the input Conducted Emission pass the test standard, all of the measures carried out are analyzed in detail.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123329241","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8211679
A. Tsuda, Yosuke Mino, S. Nishimura
The objective of this paper is to clarify the differences between cold aisle containment (CAC) and hot aisle containment (HAC) with regard to the air-intake temperature of the ICT equipment in the rack. Thus, we constructed a system in which these two capping methods could be compared under the same load and air-conditioned environment, and measured those thermal environments. When the ICT equipment is installed vertically in the middle of the rack, the air-intake temperature with CAC was lower than that with HAC. The average difference was 1°;C, and 3°;C on the upper intake side. We also adjusted the air-intake temperatures of the ICT equipment to the equivalent level under both types of aisle containment by controlling the air-conditioning supplied air volume. As a result, when each air-intake temperature was kept at the same level under capping methods in the test environment, the air-conditioning fan power consumption with HAC was twice that with CAC. This demonstrates that the CAC can save more energy consumed by air-conditioning systems as it easily retains the low temperature conditions.
{"title":"Comparison of ICT equipment air-intake temperatures between cold aisle containment and hot aisle containment in datacenters","authors":"A. Tsuda, Yosuke Mino, S. Nishimura","doi":"10.1109/INTLEC.2017.8211679","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8211679","url":null,"abstract":"The objective of this paper is to clarify the differences between cold aisle containment (CAC) and hot aisle containment (HAC) with regard to the air-intake temperature of the ICT equipment in the rack. Thus, we constructed a system in which these two capping methods could be compared under the same load and air-conditioned environment, and measured those thermal environments. When the ICT equipment is installed vertically in the middle of the rack, the air-intake temperature with CAC was lower than that with HAC. The average difference was 1°;C, and 3°;C on the upper intake side. We also adjusted the air-intake temperatures of the ICT equipment to the equivalent level under both types of aisle containment by controlling the air-conditioning supplied air volume. As a result, when each air-intake temperature was kept at the same level under capping methods in the test environment, the air-conditioning fan power consumption with HAC was twice that with CAC. This demonstrates that the CAC can save more energy consumed by air-conditioning systems as it easily retains the low temperature conditions.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129666708","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}
In this paper, methods of energy transformation to reduce OPEX for remote area are introduced which can be divided into efficiency improving and consumption reducing.
本文介绍了降低偏远地区运营成本的能源转换方法，可分为提高效率和降低消耗。
{"title":"A penny saved is a penny earned methods of energy transformation to reduce OPEX for remote area","authors":"Weibo Li, Junning Fan, Yong Xiong, Qian Zhang, Mingming Liu, Xianhong Hu","doi":"10.1109/INTLEC.2017.8214187","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214187","url":null,"abstract":"In this paper, methods of energy transformation to reduce OPEX for remote area are introduced which can be divided into efficiency improving and consumption reducing.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"51 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128684610","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 : 2017-10-01DOI: 10.1109/INTLEC.2017.8214124
R. Narayan
In the 1990's we were predicting that telecommunications and computing technologies will inevitably converge. Today we don't even see them as separate industries. Let us look at how this convergence has affected the design of grounding systems inside telecommunications and computer room. Mesh bonding network, MBN are common historically and today in AC Data Centers and computer room. MBN is defined as “a bonding network to which all associated equipment (e.g., cabinets, frames, racks, trays, pathways) are connected using a bonding grid, which is connected to multiple points on the common bonding network.” in Standard TIA 607C Isolated Bonded Networks IBN has been predominant in telecommunications rooms like central offices, cell sites, outdoor cabinets and transmission sites. In this system a single point connection window is used where all equipment is connected directly or via an ground bus or a ground halo to single ground bar. This paper explains the MBN and IBN methods of indoor grounding and explores the potential advantages and disadvantages of each system. There is cause for future merging of AC data rooms and DC Telecom room into one. The future decision will be to choose one of these systems for the common function equipment rooms.
{"title":"Mesh bonded vs isolated bonded earthing network for indoor grounding","authors":"R. Narayan","doi":"10.1109/INTLEC.2017.8214124","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214124","url":null,"abstract":"In the 1990's we were predicting that telecommunications and computing technologies will inevitably converge. Today we don't even see them as separate industries. Let us look at how this convergence has affected the design of grounding systems inside telecommunications and computer room. Mesh bonding network, MBN are common historically and today in AC Data Centers and computer room. MBN is defined as “a bonding network to which all associated equipment (e.g., cabinets, frames, racks, trays, pathways) are connected using a bonding grid, which is connected to multiple points on the common bonding network.” in Standard TIA 607C Isolated Bonded Networks IBN has been predominant in telecommunications rooms like central offices, cell sites, outdoor cabinets and transmission sites. In this system a single point connection window is used where all equipment is connected directly or via an ground bus or a ground halo to single ground bar. This paper explains the MBN and IBN methods of indoor grounding and explores the potential advantages and disadvantages of each system. There is cause for future merging of AC data rooms and DC Telecom room into one. The future decision will be to choose one of these systems for the common function equipment rooms.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122023218","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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