Power Systems R&D Center
The Power Systems R&D Center opened in January 2010 to promote business development in line with technological innovations in the electric power infrastructure sector (such as expanded use of renewable energies and advanced electric power infrastructure using information and communications technology). More specifically, the center promotes research and development of elemental technologies, commercial products, equipment and systems that are essential for smart grid construction.
Redox flow battery
In a power system using power generated by renewable energy, the storage battery plays the critical role of storing and discharging electric power in response to fluctuations in generated electric power. Redox flow batteries are suitable for irregular, highly fluctuating charge/discharge operations, enabling accurate monitoring and control of stored electric power. Accordingly, they are optimal storage batteries for smart grids designed for efficient use of solar, wind power and other renewable energy resources. We are focusing product development efforts on redox flow batteries for use in smart grids on a fully commercial basis.
PV inverter and POWER DEPO™II storage battery system
(Left) A PV inverter converts generated DC power to AC power. Provided with voltage control and communication functions, it also resolves natural energy problems such as fluctuations in output power.
(Right) POWER DEPO™II storage battery system.
By the formation of high-temperature superconducting thin-film on our world’s first textured metal substrate with low cost, low magnetic and high strength, our superconducting tapes (size: 4mm width, 150μm thickness) enable us to pass electric current higher than 200A at a liquid nitrogen temperature of -196℃. It is expected to be applied widely to superconducting cable, superconducting electromagnet, nuclear magnetic resonance (NMR) device and magnetic resonance imaging (MRI) device.
The power generation efficiency of concentrator photovoltaic (CPV) is about twice that of silicon solar panels currently on the market, since CPV cells are made from a special compound semiconductor material. Installed at an elevated position, concentrator panels provide usable space underneath them. Expectations are high for CPV as a next-generation photovoltaic. In the newly developed CPV, panels are thinner and lighter than those of conventional CPV.
New energy system
Our new energy system architecture (sEMSA™) achieves the optimal control of distributed energy resources such as wide-spreading photovoltaic generation, cogeneration and storage battery, as well as the energy cost reduction. Furthermore, by gathering energy consumers for aggregator, unifying energy management and adjusting demand energy by way of demand response, it enables us to stabilize energy networks and establish beneficial systems.
Power line communication system
We are developing communication modules for smart meters and string monitoring systems for mega solar power plants by applying power line communication (PLC) and radio communication technologies. Our string monitoring systems are composed of the sensing elements with a current or voltage sensor to measure generated energy and the PLC communication elements to transmit sensor data. By the applications of power lines, it enables us to establish low-cost, highly-reliable systems without the need of new communication and power supply lines. We further promote its development by IoT (Internet of Things) solutions.