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Power Systems R&D Center

We are developing new technologies and products in response to technological innovations in the electric power infrastructure sector, such as widespread use of renewable energy and sophisticated power infrastructure by using infocommunications technologies. More specifically, we are conducting R&D on elemental technologies, products, equipment, and systems that are essential for smart grids, i.e. future power networks.

Redox flow battery

In power systems using renewable energy generation, secondary batteries play a critical role in power storage and discharge in response to fluctuations in generated power. Redox flow batteries are suitable for irregular, highly fluctuating charge-discharge operation, and enable accurate monitoring and control of stored power. Therefore, they show promise as the most suitable batteries for smart grids designed for efficient use of renewables such as solar and wind. Based on our previous commercial project, we are pushing ahead with development aiming to put the batteries into full-fledged use.

Redox flow battery

PV inverter and POWER DEPO™ III storage battery system

(Left) A PV inverter converts generated DC power to AC. Provided with voltage control and communication functions, it resolves the challenges encountered with natural energy usage such as the fluctuation in power generation.
(Right) POWER DEPO™ Ⅲ storage battery system

PV inverter and POWER DEPO™II storage battery system

Superconducting tape

By the formation of high-temperature superconducting thin-film on our world’s first low cost, low magnetism, high strength textured metal substrate, our superconducting tapes (size: 4 mm width, l50 μm thickness) enable current to flow higher than 200 A at a liquid nitrogen temperature of -196°C. They are expected to be used widely in cables, electromagnets, nuclear magnetic resonance (NMR) devices and magnetic resonance imaging (MRI) devices.

Superconducting tape

Concentrator photovoltaic system

Concentrator photovoltaic (CPV) systems are the next generation in solar energy systems. The systems have approximately twice the power generation efficiency of silicon systems currently on the market, since photovoltaic cells are composed of a special compound semiconductor. Installed at an elevated position, concentrator panels provide usable space underneath themselves.
The CPV panels we developed boast light weight and less thickness compared with conventional ones.

Concentrator photovoltaicConcentrator photovoltaic system

New energy system

Our new energy system architecture (sEMSA™) enables optimal control of distributed power sources such as wide-spreading photovoltaic generation, cogeneration, and storage batteries, as well as energy cost reduction. Furthermore, sEMSA™ enables economically viable business for aggregators by putting together energy consumers, unifying energy management, adjusting power demand by way of demand response and stabilizing power networks.

* Wi-SUN is a trademark or registered trademark of Wi-SUN Alliance, Inc
* Wi-Fi is a trademark or registered trademark of Wi-Fi Alliance.
* ZigBee is a trademark or registered trademark of ZigBee Alliance
* ECHONET and ECHONET Lite are trademarks or registered trademarks of ECHONET CONSORTIUM.
New energy system

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 incorporate sensing elements with a current and voltage sensor to measure generated energy, and PLC communication elements to transmit sensor data. By using power lines, low-cost, highly-reliable systems can be installed without new communication and power lines. We will push ahead with development employing loT (Internet of Things) solutions.

Power line communication system
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