{"title":"Serial multi-module UPS system control method considering battery module balancing","authors":"Soon-Ryung Lee, Seung-Ho Baek, C. Won","doi":"10.1109/INTLEC.2015.7572345","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572345","url":null,"abstract":"In this paper, serial multi-module UPS system control considering battery module balancing is proposed. Because of the organization, the UPS system has some properties. One of them is output voltage is sum of each UPS module output voltage. Thus, each UPS module output voltage respective control can accomplish each battery module balancing according to SOCs of each battery module. As SOC is high or low, output power of each module is controlled proportionally to equalize SOC of the battery modules. And the reference of the output powers is compensated according to magnitude of SOC difference. Eventually, utilization of the batteries can be increased by preventing over-charge and over-discharge problem. The proposed control is verified by simulation and experimental result.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115818998","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}
{"title":"Edison vs Tesla: A rematch in the telecom data center","authors":"Paul D. Smith","doi":"10.1109/INTLEC.2015.7572449","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572449","url":null,"abstract":"For over a century, since the invention of the telephone, the telephone network has relied on DC Power and has used DC battery reserve to provide “continuous dial tone”, even during commercial power outages. The debate between proponents of George Westinghouse's AC and Thomas Edison's DC commercial power distribution schemes has raged just about as long as the telephone has existed. The debate over the use of AC and DC Uninterruptible Power Supplies (UPS's) is more recent. Powering Telecommunications equipment has long been dominated by DC UPS's while Computer equipment has traditionally been backed up by AC UPS's. The metamorphosis of telecommunications networks into Information and Communications Technology (ICT) networks with their reliance upon digital technologies has blurred the distinction of these systems and the choice of UPS technology reflects this. Changing requirements and advances in battery chemistries, power system efficiencies and software controls are all affecting choice of power system architecture. This paper examines the changing requirements of ICT network equipment and their effect on the various AC and DC UPS architectures that are available to power them. Changing requirements have opened up opportunities for different power architectures utilizing new battery chemistries, while advances in power conversion equipment allow power systems to be placed in different locations, improving distribution efficiency. Continuous pressure for operational cost reduction is fueling the need for more efficient “end to end” systems, as well as reducing capital costs of equipment. Total Cost of Ownership (TCO) is now a key ingredient in the choice of power architecture alongside the questions of reliability, availability, reserve time, redundancy and scalability. The impact of all these key ingredients is examined. This paper examines these advances with a view to better understanding the trends in power architectures and implementation. This may also allow us a glimpse into the “crystal ball” of future developments and trends.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121601540","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}
{"title":"Determine the optimal level of automation in distribution networks with local remote control switches and VIT switches automation","authors":"H. Sharifian, Vahid Baghishani, M. Zabihi","doi":"10.1109/INTLEC.2015.7572473","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572473","url":null,"abstract":"Smart grid encompasses a variety of tools, techniques and technologies that will allow energy suppliers to more accurately measure electricity flows and remotely control each point of the transmission and distribution network using two way digital technology. In this paper, determine the optimal level of automation in distribution networks with local remote control switches and VIT switches automation are probed. Also, the comparison of improving reliability indices are presented in 3 automation level, without supervisory control and data acquisition (SCADA), whit only SCADA and SCADA with VIT switches automation.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116577292","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}
Teruhito Takeda, T. Fujino, K. Ogasawara, Satohiko Hosomi, Hiromichi Goto, H. Abe
{"title":"A thin transformer realized by optimizing the resonance voltage of an active clamp soft-switching converter","authors":"Teruhito Takeda, T. Fujino, K. Ogasawara, Satohiko Hosomi, Hiromichi Goto, H. Abe","doi":"10.1109/INTLEC.2015.7572304","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572304","url":null,"abstract":"This paper proposes a high frequency switching active clamp flyback converter which can reduce the height of the transformer and the size of the power supply. This is accomplished by applying an adequate resonance voltage lower than the absolute maximum rating of the drain to source breakdown voltage of the switching device. By using this approach we succeeded in reducing the height of the transformer and the size of the power supply to approximately half.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122423011","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}
Jia Jin, Yoshiki Yashima, H. Omori, N. Kimura, T. Morizane, M. Nakaoka
{"title":"Reduction of magnetic fields to human exposure from a wireless EV charger by a new cancelling method","authors":"Jia Jin, Yoshiki Yashima, H. Omori, N. Kimura, T. Morizane, M. Nakaoka","doi":"10.1109/INTLEC.2015.7572491","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572491","url":null,"abstract":"The latest Electric Vehicles (EV)-related power electronics have attracted special interest as one of effective solutions to energy and environmental issues. In order to implement a promising EV battery charging equipment and its EMS infrastructures for carports in private houses and public buildings, Wireless Power Transfer (WPT)-based on-board chargers (OBC) are more suitable and acceptable from a practical point of view. The authors have developed cost-effective WPT-OBC embedding the voltage-fed quasi-resonant ZVS high-frequency inverter with a single IGBT switch, which operates under the condition of PWM-dependent PFM control scheme. In actual, leakage magnetic field exposure emitted from WPT assembly should follow the feasible guideline of ICNIRP. This paper presents a new conceptual magnetic shielding method which is able to reduce the leakage magnetic field exposure from the wireless Inductive Power Transfer (IPT) assembly. It is noted that this method is based on the combined magnetic shielding implementation which makes use of both magnetic flux path concept by magnetic material and magnetic field cancellation principle eddy current induced into the conductive plates. Furthermore, the effectiveness of the leakage magnetic shielding technique in WPT is proven by the analytical considerations and experimentally-observed data.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131286915","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}
{"title":"Suppression of heat leakage by cooling thermoelectric device for low-temperature waste-heat thermoelectric generation","authors":"T. Ishiyama, H. Yamada","doi":"10.1109/INTLEC.2015.7572490","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572490","url":null,"abstract":"The output voltage characteristics of a thermoelectric generator were analyzed to suppress heat leakage for low-temperature waste-heat thermoelectric generation. The experimental results show that the pre-cooled thermoelectric device output a higher voltage than the reference device. The experimental results also show that the influence of heat leakage took a longer time to appear using the pre-cooled thermoelectric device. These results suggest that the pre-cooled thermoelectric device is effective in suppressing the influence of heat leakage.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131686740","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}
{"title":"High accuracy and resolution illuminance sensing for intelligent energy management","authors":"Y. L. Sum, S. Chien, Y. Chan, B. Soong, K. Tseng","doi":"10.1109/INTLEC.2015.7572465","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572465","url":null,"abstract":"Typical low cost light sensors used in modern day buildings have an error of up to 40%. To achieve intelligent lighting control for intelligent energy management, illuminance sensor nodes need to have less than 5% error. In order to realize such sensors, high accuracy illuminance sensors of error less than 3 % are proposed to be integrated with high resolution Analog to Digital Converters (ADC). Subsequently, this data is sent wirelessly to a gateway for processing to minimize frequent fluctuations due to the high sensitivity of the sensors. Finally, a grid of nine sensors is deployed in a test bed to verify the proposed solution.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133982328","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}
{"title":"Clustering-based performance assessment of thermal energy management in buildings","authors":"G. Chicco, F. de Bosio, M. Pastorelli, M. Fantino","doi":"10.1109/INTLEC.2015.7572275","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572275","url":null,"abstract":"In recent years a growing attention is being paid towards energy efficiency in civil and industrial applications. In order to achieve better efficiency and enhance the energy management strategies, better knowledge is needed on the characterization of energy consumers. Categorization of electrical consumers through clustering procedures has been widely addressed in the literature. However, the categorization of the thermal users has been considered to a lower extent, also because of the difficulty of gathering a sufficient and reliable amount of data. This paper analyzes the behavior of several final users on the thermal side. At first, the energy behavior of the buildings from a thermal point is defined by its energy signature, represented as a straight line derived from measurements gathered in the heating period. Then, the parameters of the energy signature are used within a clustering procedure to create consistent groups of buildings. The results enable the operators to identify salient features of the groups of buildings under analysis, and to monitor the changes carried out in the buildings, leading to possible changes of the group during time.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133803927","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}
H. Yajima, T. Babasaki, K. Usui, Yasuyuki Ooi, K. Hirose
{"title":"Energy-saving and efficient use of renewable energy by introducing an 380 VDC power-supply system in data centers","authors":"H. Yajima, T. Babasaki, K. Usui, Yasuyuki Ooi, K. Hirose","doi":"10.1109/INTLEC.2015.7572291","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572291","url":null,"abstract":"Power consumption of the ICT sector of information and communication facilities and data centers has grown, and this has led to a need to improve energy efficiency of these facilities. DC distribution systems employing 380 VDC as the supply voltage is one promising approach to address this problem, countries around the world and are progressing to develop and deploy commercial services. We demonstrated a 380 VDC power distribution system interconnected with a solar power generation system. This demonstration showed that the 380 VDC power supply system saves more energy than the AC power supply system and showed how carbon dioxide emissions are reduced by integrating the solar power generation system.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115718882","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}
{"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":"21 1","pages":"0"},"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}