D-SMiree System for Medium-and Low-voltage DC Distribution

Mitsubishi Electric Corporation

D-SMiree Development and Demonstration Facility

Outline

DC Distribution Network System is a power distribution system of next generation that leads to loss reduction at conversion with alternating current, more effective use of renewable energy, parts reduction in electric devices, and lowered failure rate.
Currently Product development of direct-current distribution systems, is promoted at the DC Development and Demonstration Facility at Mitsubishi Electric's Power Distribution Systems Center in Marugame, Kagawa Prefecture, Japan. It will contribute to the reduction of greenhouse gas emissions by promoting the development of systems for data centers, buildings, factories, stations, etc. in the future for popularization and implementation of DC power distribution systems.

Description

In line with the increasing importance of data centers and cloud services, as well as the business continuity plans of corporations, particularly since the Great Eastern Japan Earthquake in 2011, a growing focus is being cast on solar-power generation systems that incorporate storage batteries and Net Zero Energy Buildings. Consequently, environmentally conscious direct-current distribution systems that combine renewable energy and electrical accumulators are gaining popularity.

Mitsubishi Electric has been contributing to the growing direct-current ecosystem by leveraging technologies that it originally developed for DC power generation, high-speed circuits for railways and data-center energy systems. D-SMiree ─ Diamond-Smart Medium Voltage Direct Current Distribution Network System for Innovative Reliable Economical Ecology ─ now unifies these initiatives under a single brand.

The facility in Marugame will develop next-generation MV/LV DC distribution systems for DC power distribution based on enhanced reliability, environmental friendliness and cost effectiveness. Advanced smart-grid technologies and storage-battery systems will be incorporated in enhanced, extra-efficient solutions for purposes including the following:

- Power generation ─ Easy interconnection of diversified renewable energy sources such as solar, wind, and fuel cells, without the need for electrical synchronization
- Energy storage ─ Highly efficient operation of storage batteries by leveraging Energy Management System power-generation and demand-forecast functions
- Efficiency ─ Reduced electrical loss through reduced power conversion compared to traditional AC distribution systems

Supplementary information

1.News Release: Mitsubishi Electric Launches D-SMiree System for Medium- and Low-voltage DC Distribution
https://de.mitsubishielectric.com/sites/de/en/news-events/releases/global/2016/0727-a/index.html

2.News Release: Mitsubishi Electric to Build Net Zero Energy Building Test Facility
https://www.mitsubishielectric.com/news/2019/0130.html

3.News Release: Mitsubishi Electric to Begin Operating High-voltage Direct Current Verification Facility
https://www.mitsubishielectric.com/news/2018/1113.html

4.Global Website: Initiatives that contribute to addressing environmental issues of Mitsubishi Electric Corp. Energy & Industrial Systems Group
https://www.mitsubishielectric.com/en/sustainability/csr/management/social_contributions/energy/index.html