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Products and Services Associated with Power Supply

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Products and Services Associated with Power Supply

[Image] Products and Services Associated with Power Supply

Generating power – Power generation technologies –

Electric power supply is an important lifeline that supports our lives. Toshiba Group promotes various initiatives to ensure a stable power supply as well as to mitigate climate change.

Main power source

Currently, approximately 80%*1 of the world's power is produced by thermal power generation from fossil fuels. Toshiba Group aims to achieve its goal of ensuring both environmental consciousness and a stable power supply by using a variety of technologies, including high efficiency thermal power generation; technologies for separating and collecting CO2 from emissions caused by thermal power generation; and super critical CO2 cycle power generation which can collect CO2 without the loss of energy while generating power.

We are also striving to restart nuclear power plants in Japan. To this end, we are implementing measures to enhance nuclear reactor cooling systems and control the release of radioactive materials with the aim of preventing serious accidents and mitigating the effects of radiation. In addition to developing a reactor core material that can reduce the amount of hydrogen in the event of a major accident as well as to protecting against cyber-attacks, we will continue ongoing efforts to further improve the safety of nuclear power plants.

Toshiba Group is also engaged in technology development, and we respond to a wide range of customer requirements, including the development of a technology for hydroelectric power generation that improves water runner efficiency by applying CFD*2, promotion of the introduction of renewable energy devices by using adjustable speed pumped storage power generation systems, and the expansion of sales of Geoportable™, a compact geothermal power generation model that can be introduced at a low initial cost.

*1
Source: World Energy Outlook 2019
*2
CFD: Computational Fluid Dynamics

Renewable energy (Photovoltaic)

In the area of industrial photovoltaic power generation systems, Toshiba Group has delivered large-scale photovoltaic power plants with capacities of more than 10 MW to many locations in Japan. In addition, in 2018, we began selling a 360-W photovoltaic module with a conversion efficiency of 22.1% for residential photovoltaic power generation systems, thereby helping reduce CO2 emissions.

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Storing power – Power storage technologies –

The amount of power generated by some renewable energy technologies varies with the weather, so generating power with renewable energy is an unstable method for generating power. Expanding the use of this method requires controlling sharp output fluctuations and achieving load leveling through peak shifts. To handle such requirements, Toshiba Group provides products such as adjustable speed pumped storage power generation systems and a stationary storage battery system that uses Toshiba's high-performance lithium-ion battery, SCiB™, as modules.

Furthermore, in 2015, we commercialized H2One™, a hydrogen-based autonomous energy supply system that can supply power whenever needed by manufacturing and storing hydrogen using surplus power from renewable energy.

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Distributing power – Power transmission and transformation technologies –

In order to provide an economical and stable power supply, we deliver various systems, including high-voltage, large-capacity power transmission/transformation devices, medium- and low-voltage power distribution devices, system protection relay devices, and monitoring and control equipment systems that remotely control these devices. With regard to DC power transmission technology that can reduce transmission losses compared to AC power transmission, Toshiba Group leverages our own technologies to participate in international projects for DC power transmission technologies as well as to provide such projects with major devices, including suspended thyristor valves and converter transformers.

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Comprehensive energy coordination – Power demand forecasting technology, etc. –

As renewable energies increase, technology to fill the gap between power supply and demand has become more and more important. We have been developing virtual power plant (VPP) technology to optimally control multiple batteries using IoT, a technology to accurately forecast power demand and power generation from renewable energy, and other technologies to generate, transmit, and store energy.

Both our high accuracy weather forecasting technology based on a numerical weather model and high accuracy forecasting technology for power demand and solar power generation that combines a technology to use weather big data for AI have received goods results*3 in a contest hosted by major power companies.

*3
Best award in the "First Electricity Load Forecasting Technology Contest" (2017), a contest hosted by TEPCO Power Grid, and Grand prize in the "PV in HOKKAIDO Contest on Technology for Predicting Solar Energy Production" (2019), a contest hosted by TEPCO and Hokkaido Electric Power.

 

Case : Low cost, high efficiency tandem photovoltaics using cuprous oxide and silicon

Toshiba Corporation
Corporate Research & Development Center

7913

With the advancement of the electrification of cars, buses, and ships as well as the spread of drones, the global market for electric mobility is expected to grow substantially going forward. Installing high efficiency photovoltaics, which supply the required large amount of power in electric mobility, makes it possible to realize solar mobility (self-charging electric vehicle systems using PV power). In the future, we expect that the high efficiency photovoltaics market will rapidly expand. However, photovoltaics that use gallium arsenide semiconductors, the typical type of high efficiency photovoltaics, are very expensive, and the material resources to make them are limited. Therefore, we have been advancing the development of low cost, high efficiency tandem photovoltaics using cuprous oxide (Cu2O) and silicon (Si). In general, tandem photovoltaics that employ two kinds of solar cells have high efficiency because they can efficiently transform a sunlight of wide range of wavelength into electricity. Cu2O/Si tandem photovoltaics are also low cost because Cu2O solar cells consist of copper and oxygen, which exist in abundance on the earth, and Si solar cells are the mainstream cell in today's market. We aim to make the most of this tandem technology to realize a low cost, high efficiency photovoltaic for widespread use in society.

[Image] Low cost, high efficiency tandem photovoltaics using cuprous oxide and silicon

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