{"title":"Experimental verification of suppressing power fluctuation in photovoltaic generation system using water electrolyzer","authors":"A. Takahashi, J. Imai, S. Funabiki","doi":"10.1109/INTLEC.2017.8214196","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214196","url":null,"abstract":"This paper develops an emulator simulating the power smoothing control for the photovoltaic generation system with an energy storage system using a water electrolyzer and realizes experimental verification. In this system, the fluctuating components of the photovoltaic generation power are converted to hydrogen and stored. The availability of this system is evaluated by means of the suppression effect of the power fluctuating components in the load frequency control region and the amount of produced hydrogen for a day. In the emulator with the rated power of 200 W for the photovoltaic generation system, the amount of produced hydrogen was 2.11 mol. This result corresponds to 8.22×103 mol for the photovoltaic system whose rated power is 800 kW. Furthermore, the fluctuating components in the load frequency control region were reduced by 47.3%.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"10 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":"126327288","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":"Demonstration project of power system stabilization with the hybrid battery energy storage system","authors":"Sano Shinichi, I. Shimoura","doi":"10.1109/INTLEC.2017.8214145","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214145","url":null,"abstract":"The introduction of renewable energy storage is being promoted as a global warming countermeasure. The increase of naturally fluctuating power supplies such as wind and photovoltaic power generations may influence the stability of the power supply. The introduction of a battery energy storage system is an effective solution to this problem. Hitachi Group developed a hybrid battery energy storage system and began a demonstration project in 2015. The hybrid battery energy storage system was installed to solve problems occurring during an increase of the naturally fluctuating power supply on Izu-Oshima Island, Tokyo, Japan, where the effect of introducing the battery energy storage system could be tested relative easily. This paper describes the development process of an advanced lead-acid battery used for the demonstration project.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"19 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":"133510360","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":"A novel three-phase DC-DC PWM isolated boost converter","authors":"A. Abosnina, G. Moschopoulos","doi":"10.1109/INTLEC.2017.8214179","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214179","url":null,"abstract":"A new three-phase DC-DC PWM boost converter that is suitable for use in renewable energy applications is proposed in the paper. The number of components in the proposed circuit is fewer that other previously proposed converters of the same type, resulting in lower cost and simpler operation. The paper discusses the operation of the converter, presents a procedure for its design, and demonstrates the procedure with an example. Experimental results obtained from a converter prototype are presented to confirm the converter's feasibility.","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":"129850172","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":"Research on the operating mode of the power supply for a telecom base station based on the peak & valley model of the power grid","authors":"Shaomin Zhang, Pengchao Wang, Mingming Liu, Zhirong Cheng","doi":"10.1109/INTLEC.2017.8214188","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214188","url":null,"abstract":"With the development of mobile communication technology, communication system requires significantly more electricity, according to statistics, in the year 2015 a company mobile base station's power charge reached ¥750 million Yuan. Considering the implementation of the peak and valley price mechanism in some areas, and how battery technology has developed, this paper presents the peak and valley operating mode of a communication base station power supply system, and analyzes and evaluates the operation benefit. The controller of base station power can set the peak and valley time freely according to the peak and valley price model and the battery capacity, and support single peak operation and multi-peak operating mode. The Battery's power is used as much as possible during peak period, battery power is used preferentially during the flat hump period, and the power grid charges the battery and power communication base station in the valley period. This can greatly reduce the peak period electricity consumption, is conducive to lower operating costs and stable operation of the power grid. With the application of a hybrid energy system in a communication base station, the hybrid power supply system is introduced to reduce the demand for battery capacity and reduce the grid's power consumption. The research shows that the operating mode based on the grid peak and valley model can greatly reduce operating costs, and because of the introduction of solar energy, it achieves an energy-saving emission reduction, and also helps to further expand economic benefits.","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":"130343059","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":"Innovative fuel cell deployment in telstra's network and key learnings from the field","authors":"Louise Stroyov, Sophiya Patel, Rafiq Ali","doi":"10.1109/INTLEC.2017.8211677","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8211677","url":null,"abstract":"Telstra's telecommunication network covers a diverse area, which is subject to Australia's challenging environmental factors. These factors present challenges to the network and can prominently affect Telstra's remote sites, especially off-grid sites. This paper presents the key findings of using stationary fuel cells at these remote sites. The fuel cells implemented by Telstra are indirect methanol and electrolysis-based Proton Exchange Membrane Fuel Cells (PEMFCs). Additionally, this paper covers site logistical challenges and overcoming traditional technology mindsets along with key operational benefits.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"32 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":"114513066","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":"Coupled inductor based single-phase bridgeless PFC boost rectifier with auxiliary circuit assisted ZVS","authors":"Debjani Chakraborty, P. Das, D. Srinivasan","doi":"10.1109/INTLEC.2017.8214171","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214171","url":null,"abstract":"Front end PFC (power factor correction) boost ac-dc converter is an intrinsic part of applications like telecom servers, electric vehicle (EV) charging, and microgrids. In this paper a bridgeless PFC boost rectifier with two dc/dc boost circuits topology is employed to convert universal ac input to a fixed and regulated output dc voltage. High efficiency and power density are key figure-of-merits of boost PFC ac-dc converters. In this converter the conduction losses are reduced owing to the bridgeless topology and the boost diode reverse recovery is eliminated using MOSFETs for synchronous rectification. The converter operates in continuous conduction mode (CCM), at a switching frequency of 500 kHz. At high switching frequency and at CCM, soft-switching is necessary, therefore a passive auxiliary circuit is used to achieve zero voltage switching (ZVS). In order to increase the power density, the boost and the auxiliary inductors are magnetically coupled with a very low coupling coefficient. This coupling reduces the volume of the magnetics, although there is some loss due to the additional circulating current resulting from the coupling, however this loss is not that significant. Although passive auxiliary circuit adds more components, however at 500 kHz switching frequency these passive components do not occupy significant space. The soft-switching improves the efficiency and reduces EMI noise and cooling requirements. The detailed analysis, design and simulation results using PSIM are provided to validate the theoretical claims.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"336 3 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":"123231825","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":"A review of the suitability of lithium battery technology in ict energy infrastructure","authors":"O. Vigerstol","doi":"10.1109/INTLEC.2017.8214144","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214144","url":null,"abstract":"The evolution of rechargeable lithium (Li) batteries has led to the development of several categories of batteries, each one with different combinations of electrode materials and electrolytes. They all have differences in performance characteristics, production cost and operating safety and it is therefore difficult to determine what specific battery is best suited for a specific application. This has led to much confusion and sometime hesitation by potential users to consider these batteries. By far, most Li batteries produced today are used in typical cycling applications such as electric vehicles (EVs), cell phones, portable tools, laptops and other portable electrical devices. Li battery manufacturers have therefore focused most of their product development towards these applications. Only a handful of manufacturers have optimized cells and batteries for long life and the ultimate safety and reliability required in ICT applications. This paper provides an overview of the different technologies, their performance characteristics and applicable standards, with a focus on battery types best suited for Information and Communication Technologies (ICT) applications.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"16 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":"122325685","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}
T. Koyama, T. Honjo, Masataka Ishihara, K. Umetani, E. Hiraki
{"title":"Simple self-driven synchronous rectifier for resonant inductive coupling wireless power transfer","authors":"T. Koyama, T. Honjo, Masataka Ishihara, K. Umetani, E. Hiraki","doi":"10.1109/INTLEC.2017.8214163","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214163","url":null,"abstract":"Resonant inductive coupling wireless power transfer (RIC-WPT) is attracting attention as a convenient power supply method to small mobile apparatus. The efficiency and the power transfer capability of RIC-WPT has been known to be profoundly dependent on the quality factor of the receiving resonator. However, the quality factor of the receiving resonator tends to be deteriorated because of the conduction loss at the diode rectifier, particularly for low output voltage applications. In order to improve the efficiency and the power transfer capability, this paper propose a novel simple synchronous rectifier, which can reduce the conduction loss. The proposed rectifier has simple circuit configuration, which contributes to straightforward application to the wireless power transfer to small mobile apparatus with limited installation space. Experiment was carried out to verify the operation principle of the proposed rectifier. As a result, the proposed rectifier revealed successful suppression of the conduction loss. In addition, the experimental wireless power transfer system verified successful improvement in the rectification efficiency, supporting usefulness of the proposed rectifier for practical applications of the RIC-WPT for small mobile apparatus.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"31 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":"115399935","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}
S. Hariharan, Glenn Lumanog, José Carlos Santana, Iain Selkirk
{"title":"Remote powering the cellular infrastructure at the RIO 2016 olympic games","authors":"S. Hariharan, Glenn Lumanog, José Carlos Santana, Iain Selkirk","doi":"10.1109/intlec.2017.8214130","DOIUrl":"https://doi.org/10.1109/intlec.2017.8214130","url":null,"abstract":"At three key sporting venues of the RIO 2016 Olympic Games, an innovative remote powering solution was used to deliver power from a central source to Remote Radio Units (RRUs) located on cell towers. The solution effectively powered the RRUs from a centralized source of DC power while providing battery backup protection. This paper describes the powering challenges faced by the Wireless Service Provider (WSP) and the power system architecture chosen to overcome these challenges. It also focuses on the important issues of safety and planning of the remote line power network which include: (1) the safety requirements of RFT-V circuits; (2) the location of the Line Power equipment relative to the RRUs; (3) the type and condition of the copper cable pairs between the Line Power location and the RRU site; (4) the availability and capacity of the cable management devices; (5) the capacity of the 48Vdc power system and batteries and (6) the outside plant cabinet solution located at the remote end.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"34 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":"116664161","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}
I. Alaperä, P. Manner, Johan Salmelin, Heli Antila
{"title":"Usage of telecommunication base station batteries in demand response for frequency containment disturbance reserve: Motivation, background and pilot results","authors":"I. Alaperä, P. Manner, Johan Salmelin, Heli Antila","doi":"10.1109/INTLEC.2017.8214139","DOIUrl":"https://doi.org/10.1109/INTLEC.2017.8214139","url":null,"abstract":"Electrical power systems are undergoing a major change globally. Ever increasing penetration of volatile renewable energy is making the balancing of electricity generation and consumption challenging, forcing transmission system operators to spend increasing amounts of money for ancillary services. This creates interesting opportunities for demand side assets, that would be able to adjust their power consumption. Paper focuses on the potential and feasibility of using existing battery systems in telecommunications base stations as an aggregated and highly distributed asset for frequency containment disturbances reserve. Potential for base stations to participate in demand response was found to be high, due to the characteristics of reserve type (e.g. predicted number of activations, required activation length and power) and the simulation results from a prepared model that indicated a negligible impact that performing these operations would have on the battery systems, their expected lifetime and ability to protect the critical telecommunications loads.","PeriodicalId":366207,"journal":{"name":"2017 IEEE International Telecommunications Energy Conference (INTELEC)","volume":"36 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":"114781525","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}