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Press Release

Demand Response Demonstration Test for Negawatt Trading Successfully Completed Using an Energy Management System, "sEMSA™"

Products & Technologies

April 22, 2015
Sumitomo Electric Industries, Ltd.
*This press release was issued on March 24, 2015 in Japan.

Under a national demonstration project, the Next-Generation Energy and Social Systems Demonstration Project led by the Ministry of Economy, Trade and Industry for negawatt trading,*1 Sumitomo Electric Industries, Ltd. has successfully delivered appointed negawatt power within 15 minutes after the issuance of a demand response (DR) request by using an energy management system "sEMSA™" developed by the company.

The demonstration test was conducted at Sumitomo Electric Yokohama Works (located in Sakae ward, Yokohama) using 3 largest redox flow (RF) batteries in Japan (totaling 5 MWh), 6 co-generation systems (CGS) (totaling 4 MW), 15 concentrated photovoltaic (CPV) units (totaling 100 kW) and an energy management system "sEMSA™" developed by Sumitomo Electric, which controlled these generators (Figure 1).

The sEMSA™ responded to a DR signal within 10 seconds after receiving the signal from EnerNOC , an aggregator, and delivered the appointed amount of electricity (640 kW x 1 h) within 15 minutes fully automatically. By doing so, the sEMSA™ reduced the power from the grid during the DR hour (Figure 2). Meanwhile, the DR request was issued using the international standard OpenADR 2.0 protocol.*2

Sumitomo Electric implemented the demonstration program jointly with EnerNOC Japan, KK (headquartered in Chiyoda ward, Tokyo and led by David Brewster, President), which is a member of a consortium of power companies and aggregators. EnerNOC Japan is working on a DR demonstration program for peak-hour supply and spinning reserve*3 led by the Ministry of Economy, Trade and Industry. Sumitomo Electric took part in the demonstration program as a customer of EnerNOC Japan.

The sEMSA™ is an energy management system developed by Sumitomo Electric and has the following features:

  1. Conforms to a flexible and expandable architecture that meets diverse customer needs and a variety of power equipment requirements
  2. Adapts instantaneously to DR requests
  3. Manages generators, including renewable energy generators, optimally and comprehensively to minimize energy costs and achieve other goals
  4. Performs contract power and various other simulation functions

The following press release provides an overview of the sEMSA™:

In the project, the sEMSA™ connected itself to EnerNOC using the international standard OpenADR. On the basis of this result, Sumitomo Electric will promote the sEMSA™ to our customers as a standard negawatt trading tool in the domestic market.

Figure 1 - System configuration used in the DR demonstration program

Figure 2 - <em>s</em>EMSA™ screen of optimal plan responding to a DR request (Jan 21, 2015)

【EnerNOC Japan, KK】

A joint venture founded in 2013 between EnerNOC, Inc. in the United States and Marubeni Corporation. EnerNOC Japan provides demand response (DR) in Japan. In fiscal 2013, the program was selected as a DR demonstration project led by the Ministry of Economy, Trade and Industry. EnerNOC Japan is administering the DR program with Marubeni Corporation and the Tokyo Electric Power Company.

*1 Trading of the amount of power demand saved by electricity conservation and/or self-power generation, regarding the saved amount as having been generated on the part of the grid

*2 Version 2.0 of the international communications protocol defined for automatic demand response

*3 Capacity reserved to compensate for any supply shortage on the grid within a short period of time (approx. 10 min or less). Spinning reserve includes the reserve capacity of a generator in partial-load operation.

*4 Acronym for demand response automation server
A server used to transmit, receive or forward DR requests, responses and other control information

*5 EnerNOC's Network Operations Center in the United States

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