FUJI ELECTRIC REVIEW Vol.63-No.1 (June/2017) Energy Creation and Social Infrastructure Solutions Contributing to Creation of Sustainable Societies

Energy Creation and Social Infrastructure Solutions Contributing to Creation of Sustainable Societies


Further use of renewable energies is required to reduce CO2 emissions to create sustainable societies. To meet the request, Fuji Electric has provided power generation solutions and power system stabilization solutions based on making full use of power electronics technology, and they are becoming more and more important.
This special issue introduces Fuji Electric’s efforts for energy creation and social infrastructure solutions and its latest technologies and products, which contribute to the creation of responsible and sustainable societies through innovation in energy and environmental technology.

[Preface] Value Transition in a Power System
OGIMOTO, Kazuhiko
Energy Creation and Social Infrastructure Solutions : Current Status and Future Outlook
FUJIWARA, Masahiro
The demand for electricity is expected to continue growing worldwide. In the area of energy creation, challenges include mitigating global warming, handling fluctuations in crude oil prices, and adapting to the electricity reform in Japan. Social infrastructure solutions, which have been developed with the aim of creating a comfortable and effective system, are required urgently to address new evaluation measures such as intrinsic safety, environmental performance and resilience.
Fuji Electric strives to make technical innovations in both energy creation and social infrastructure solutions under a business policy: “Through our innovation in energy and environment technology, we contribute to the creation of responsible and sustainable societies.”
This paper presents major projects in these fields and their outlook.
Units 5 and 6 at Lahendong Geothermal Power Plant and Units 3 and 4 at Ulubelu Geothermal Power Plant in Indonesia
MURAKAMI, Takashi; TAKAMIYA, Atsushi
Indonesia has been promoting geothermal development as a measure to overcome its increasingly serious power shortage. Fuji Electric has long been committed to geothermal power generation, which has low CO2 emissions and provides an eco-friendly and stable power supply independent of weather conditions. We possess a large number of technologies in this field. We emphasize the relationship with partners and work to shorten the construction period by applying various ideas and making efforts based on our experience and track record for promoting an engineering, procurement and construction (EPC) project. Units 5 and 6 at the Lahendong Geothermal Power Plant and Units 3 and 4 at the Ulubelu Geothermal Power Plant started commercial service up to 3 months ahead of the initial schedule, helping to improve the electricity situation in Indonesia.
Seismic-Resistant Switchboards Conforming to New Regulatory Standards Concerning Commercial Nuclear Reactors
KONNO, Masayuki; FUJIMOTO, Yoshio; NAGASAWA, Takenori
Nuclear power plants and other nuclear-related facilities are required to have a certain level of seismic capacity according to the importance of their equipment. After the Great East Japan Earthquake, the nuclear regulatory standards have been revised and demand a greater seismic capacity of related equipment. To meet the demand, Fuji Electric has been developing high-rigidity seismic-resistant switchboards that conform to the new regulatory standards. We evaluated the rigidity with natural frequency analysis and verified that dynamic components can retain their functions with vibration testing. The results show that we would achieve a target natural frequency of 30 Hz or more.
Kamikita Rokkasho Photovoltaic Power Plant with Capacity of 71MW DC / 51MW AC
Fuji Electric has developed high-efficiency power conditioning sub-systems (PCSs) and has a number of track records in delivering them to photovoltaic power plants. We won an engineering, procurement and construction (EPC) contract for Kamikita Rokkasho Photovoltaic Power Plant with a capacity of 71 MW DC / 51 MW AC and completed the delivery in January 2017. The output is converted to 51 MW AC with fifty-one 1,000-kW PCSs, boosted to 154 kV with an electric substation facility, and then transmitted to the power grid of Tohoku Electric Power Co., Inc. We conducted a general function test in November 2016 and verified that the plant has the specified functionality and performance required of a power plant. In February 2017, the plant started operations to sell electric power to Tohoku Electric Power Co., Inc. for 20 years.
Status of Development and Sales Strategy of Fuel Cell Systems
AOKI, Makoto; HORIUCHI, Yoshimi
Fuji Electric has been working to improve the functions of phosphoric acid fuel cells (PAFCs) and expand their applications. For the Japanese market, we are mainly offering models that have grid independent power supply mode for emergency and models that generate electricity from biogas. For the market outside Japan, we are providing the PAFCs for fire-prevention equipment that utilizes low oxygen concentration exhaust emitted from a fuel cell system. We have also been developing solid oxide fuel cells (SOFCs) for next-generation, high-efficiency cogeneration systems. We are designing, manufacturing and evaluating the performance of them to aim for a electric power generation efficiency exceeding 50%.
Distribution Static Var Compensators and Static Synchronous Compensators for Suppressing Voltage Fluctuation
KOJIMA, Takehiko; ISOTANI, Hitoshi; YAMADA, Makoto
The rapidly expanding introduction of photovoltaic power systems in recent years may cause problems such as a voltage rise in distribution lines. To solve the voltage problems in distribution systems, Fuji Electric has developed static var compensators (SVCs) and static synchronous compensators (STATCOMs), which control voltage with reactive power. Fuji Electric’s SVCs offer a simple equipment confi guration without the need for a harmonic filter. We confirmed the effect of suppressing a voltage rise by conducting a field test within the territory of Tohoku Electric Power Co., Inc. The distribution STATCOMs are compact and lightweight devices that use SiC devices to achieve single-pole tower mounting with natural air cooling by taking advantage of these low power dissipation characteristics.
Large-Scale Power Conditioning System for Grid Storage Battery System with Redox Flow Battery Having World’s Highest Capacity Class of 60MWh
MONAI, Toshiharu; SUZAKI, Hisaharu; YANO, Keiji
Fuji Electric received an order from Sumitomo Electric Industries, Ltd. for a large-scale power conditioning system consisting of power conditioning equipment (2.5 MVA × 13 banks) and storage-bank control panels, which are part of a power system stabilization demonstration facility using a redox flow battery system having the world’s highest capacity class of 60 MWh. We delivered the system to the Minami-Hayakita Substation of Hokkaido Electric Power Co., Inc. The power conditioning equipment is capable of governor-free equivalent control for quick charging and discharging in accordance with the frequency fluctuation in the power system, remote control from the central load dispatching center, and supplementary discharge control depending on the battery status. The bank controller panels control the statuses of as many as 65 power conditioning sub-systems to achieve large-scale and high-speed parallel operation.
Power Stabilization System with Lead-Acid Batteries and Lithium-Ion Batteries for Galapagos Islands
SONE, Manabu; OSADA, Yuto
Fuji Electric has developed a power stabilization system using lead-acid batteries and lithium-ion batteries and delivered it to the Galapagos Islands, a World Natural Heritage site, in March 2016. By combining the outputs from wind turbine generators and two types of batteries with different characteristics, this power stabilization system smooths periodic fluctuations over several tens of seconds to several hours and transmits stable combined output to the electric power system. This achieved a great increase of the maximum output and facility utilization ratio of the existing wind turbine generators and markedly contributed to taking the first step toward zero consumption of fossil fuels.
New Wastewater Treatment Solution Using Bacillus
TAGUCHI, Kazuyuki; SATO, Masanori; HANAI, Yosuke
Fuji Electric has developed a new wastewater treatment solution using Bacillus. This solution uses special Bacillus that we found suitable for wastewater treatment among a number of such species existing in nature. This allows existing wastewater treatment facilities to reduce the electric power cost for aeration and sludge disposal cost without the need for large-scale modification or extension of the facilities. The sludge-less wastewater treatment system has a magnetic separator that separates sludge by magnetic force, achieving significant space-saving and better treatment performance. In an application example for factory wastewater treatment, the new wastewater treatment solution reduced the running cost by 20%, and the sludge-less wastewater treatment, by 25%.


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