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DR Optimization Technology with Flexibility to Respond to Demands of Multiple Buildings under Electricity Demand Uncertainty OTSUKI Tomoshi / AISU Hideyuki / IINO Yutaka Toshiba has been engaged in the development of technologies for the realization of smart communities to achieve a balance between the electricity demand of individual buildings and optimized energy usage in the community as a whole. As part of this effort, we are developing a clustered building and energy management system (BEMS) technology for comprehensive energy management among multiple buildings, and are now conducting demand response (DR) demonstration experiments in the Yokohama Smart City Project (YSCP), one of the largest smart city demonstration projects in Japan. The clustered BEMS is targeted at reducing the aggregate power consumption of a group of buildings through the development of a power reduction plan (DR plan) consistent with each building and the implementation of that plan. As one of the basic technologies for the clustered BEMS, we have now developed a DR optimization technology that takes into consideration both the power demand characteristics of individual buildings and electricity demand uncertainty in the region. We have conducted computer simulations and confirmed that the average costs and average number of failures in power reduction at the implementation of DR using this method are lower compared with those using other methods. Integrated Simulation Technology Maximizing Performance of All-SiC Modules KIKUCHI Takuo / TAKAO Kazuto / SHINOHE Takashi Silicon carbide (SiC) power devices with superior performance compared with currently available Si power devices are a focus of high expectations for application to power conversion equipment such as inverters. However, their intrinsic fast switching speed causes serious problems including increases in surge voltages and electromagnetic noise as well as non-uniform operation among parallelized chips, due to undesirable parasitic inductances in the power module. Toshiba has developed a novel integrated simulation technology for all-SiC modules, allowing these issues related to electrical circuits and electromagnetic and thermal effects to be comprehensively handled. This technology makes it possible to implement more detailed verification and design early in the development phase, thereby contributing to the development of all-SiC modules with optimized performance and shortening of the overall development period. Miniaturization Technologies for Large-Caliber DD Motor for CT Scanners YOKOYAMA Akiyuki / SHINDO Yasutaka There has been an ongoing need in the field of computed tomography (CT) scanners in recent years for both expansion of the inside aperture of the gantry to ease the physical restriction on patients, and downsizing of the equipment to save installation space. In the AquilionTM PRIME, a high-end multislice CT scanner released in April 2013 by Toshiba Medical Systems Corporation, miniaturization of the units in the gantry and downsizing of the equipment have been realized by changing the unit layout. Miniaturization technologies for the hollow type large-caliber direct drive (DD) motor, which rotates the X-ray tubes and detectors, played a critical role in the development of the AquilionTM PRIME. The specifications of the DD motor, including the winding arrangement, and form of the permanent magnets, were optimized to reduce the size to a minimum while maintaining the conventional output level. As a result, the new AquilionTM PRIME achieves reductions in volume and weight of 34% and 28%, respectively, compared with our conventional models. Hydrogen Electric Power Storage System Using Renewable Electricity WATANABE Hisao / KAMEDA Tsuneji / YAMADA Masahiko With the widespread introduction of renewable energy sources including photovoltaic and wind power facilities in Japan since the Great East Japan Earthquake of March 11, 2011, electricity storage systems have become necessary for load leveling and demand regulation. Toshiba has been developing a hydrogen electric power storage system, which produces hydrogen using surplus electricity and generates electricity by fuel cells using the produced hydrogen. Through conceptual design of such a system using solid oxide electrolysis cells (SOECs) with high charge and discharge efficiency, we have confirmed that a system using SOECs achieves a system charge and discharge efficiency of 80% and has a cost advantage in the case of large-capacity and long-term electricity storage. Electrical Equipment for N700A Shinkansen Trains TERAKADO Yasuhiro / KOIZUMI Satoshi Toshiba has been actively engaged in technology development as a core manufacturer since the beginning of the Shinkansen project, and has now supplied electrical equipment for the mass-produced N700-1000 series (N700A) Shinkansen trains running on the Tokaido Shinkansen Line of Central Japan Railway Company. In addition to equipment supplied for the N700 series Shinkansen trains, we have developed new equipment for the N700A Shinkansen including constant speed control equipment that automatically controls the train at a constant speed in response to the speed signal with sufficient accuracy, and main converter/inverter equipment that achieves a reduction in weight of 15% compared with that for the N700 series, in order to realize advanced safety, reliability, riding comfort, and environmental friendliness. Phased-Array Weather Radar for 3D Observation of Life Cycle of Local Torrential Downpours MIZUTANI Fumihiko / MASUDA Yasuharu / HANDA Hironori Sudden and unexpected weather events such as torrential rain and tornadoes are mainly caused by cumulonimbus clouds that rapidly grow in a short time of about 10 to 30 minutes. Weather radars are therefore required to conduct precise three-dimensional (3D) observations of the life cycle of cumulonimbus clouds extending to a high altitude, within a time frame of one minute. Toshiba has developed a phased-array weather radar for 3D weather observations that is equipped with a phased-array antenna consisting of 128 slotted waveguides, offering high-speed observation with high spatial resolution. By applying a digital beam forming (DBF) technology combined with electronic scanning in the vertical direction, the radar can simultaneously observe an elevation range of 0 to 90 degrees. As a result, it is capable of weather observation within a radius of 60 km and at altitudes up to 14 km with only one horizontal rotation of the antenna, while reducing the time required for observation to only 10 to 30 seconds. Small Intelligent Gateway Devices for Smart Communities and Industrial Systems NAKAZATO Junichi / IZUMI Yasuichiro / MATSUZAWA Katsuya A recent trend in supervisory and control systems in the social infrastructure and industrial fields has been an acceleration in the transition from conventional on-premises systems, whose main functions are processed at the site, to cloud systems, whose main functions are processed at a data center featuring software as a service (SaaS) and scaleout architecture. A cloud system contributes to the reduction of system introduction and operating costs due to centralized administration in the data center, and offers high-value-added services due to cooperation with other systems and big-data mining in the data center. Toshiba Solutions Corporation has developed the following equipment optimized for cloud systems: (1) a gateway device for linking a data center with sites, and (2) an input and output (IO) device for gathering data on sites. These devices are equipped with scaleout architecture, a remote software update function, and an intelligent function to resist disconnection from the data center. We have also developed a middleware for the development of applications for a distributed system at sites consisting of this gateway and IO equipment. This advanced equipment developed using the comprehensive technologies of the Toshiba Group for the social infrastructure and industrial fields including smart communities offers environmental robustness and long-term supply and support. CAONSTM 140 Air-Source Circular-Heating Heat Pump with Maximum Output Water Temperature of 90°C IMATO Naoki / TAKAYAMA Tsukasa / ISHIDA Keiichi Various types of heating equipment including boilers and electric heaters are used for various heating processes in manufacturing plants. As boilers are often installed at a particular location in a plant, it is necessary to reduce radiative heat losses from the long pipes required to transport heat to the destination, while in the case of electric heaters, it is also necessary to reduce energy consumption. As a solution to these issues, Toshiba Carrier Corporation has developed the CAONSTM 140 air-source circular-heating heat pump for high-temperature water. The CAONSTM 140 features higher energy efficiency, higher temperature circular-heating water, and compact design, permitting decentralized arrangement near locations where heat is required. Its cascade refrigerating system realizes a maximum output water temperature of 90°C and energy-efficient operation that achieves a 60% reduction in primary energy consumption compared with that of a gas boiler. The footprint of each CAONSTM 140 unit is only 0.29 m2, allowing to be installed in locations with limited space. |