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Japan<\/i>\u2019<\/i>s government presented the country<\/i>\u2019<\/i>s ideal power configuration (energy mix) for the future. With this announcement was the declaration that 40% of total energy will be generated through low-energy or renewable energy sources, even with an increasing demand for electricity taken into consideration. We asked Dr. Yasuhiro Hayashi, professor at the Department of Electrical Engineering and Bioscience, Graduate School of Advanced Science and Engineering, and Chairman of the Advanced Collaborative Research Organization for Smart Society at Waseda University about demand response, the key to success for energy mix, and future research.<\/i><\/i><\/p>\n
<\/i>Demand response, the key to reducing demand<\/span><\/b><\/p>\n <\/i>At the end of April 2015, Japan\u2019s government presented the country\u2019s energy mix for 2030. Although the government anticipates 1.7% annual economic growth, electricity demand is expected to only increase from 966.6 billion kWh in 2013 to 980.8 billion kWh. The reason why this increase in demand is so small is because the government expects 196.1 billion kWh of demand to be reduced through energy saving methods. Based on this assumption, this plan intends to cover approximately 20% of total electricity demand with renewable energy.<\/p>\n <\/i>The key to reducing demand is demand response. For example, take the middle of summer, the day before the final game of a high school baseball tournament. Of course many people will watch the final game on TV during the day in a room with air conditioning. Looking at the forecast for electricity demand on the next day based on statistical data, the electric company might predict a shortage of 150,000kW for three hours in the daytime.<\/p>\n <\/i>A conventional countermeasure for this situation is for the electric company to activate additional thermal power stations to generate power in order to offset the shortage (posi-watt). Demand response makes it possible to save the expected shortage of 150,000kW\/hour for 3 hours without sacrificing comfort, convenience or productivity. This is called \u201cnega-watt.\u201d<\/p>\n <\/i>In the near future, it will not be so difficult to secure around 450,000kWh of nega-watt. It could, for example, be secured by turning off two home-use air-conditioners (0.5kW x 2 = 1kW) for one hour at 150,000 households (equal to 150,000kWh), heat pump water heaters (1.5kW) for one hour at 100,000 households (150,000kw), and by not recharging electric vehicles (3kW) for one hour at 50,000 households (150,000kWh). Additional generation will not be necessary as long as a total of 300,000 households (only 0.4% of the 77 million households nationwide) accept the demand response. Of course, such households would receive incentives for participating.<\/p>\n <\/i>Demand response can be used for not only saving energy but also for increasing demand. If it is nice out and there is an increase in solar power, you can use surplus electricity by aligning the timing of electricity consumption with hours of excessive solar power. Specifically, surplus electricity could be used to supply hot water via heat pumps or to recharge electric vehicle. This would be automatically controlled by next-generation HEMS.<\/p>\n <\/i>Demand response can also be utilized in the event of a large-scale earthquake. Should a large earthquake occur, batteries (or electric vehicle batteries) would be activated and begin supplying energy immediately after the electric company stops distributing power. If gas is available, the system generates power via fuel batteries, uses solar power generation to provide electricity for home consumption during the daytime, and accumulates a surplus of electricity. This allows us to maintain our lifestyles even if the power supply is interrupted.<\/p>\n <\/p>\n Professor Yasuhiro Hayashi in his research lab passionately discussing energy innovation<\/p><\/div>\n Saving the world with <\/span><\/b>All Waseda<\/span><\/b><\/b><\/p>\n In regards to the next-generation EMS, there are high expectations for the cyber physical system (CPS) that utilizes hardware technology unique to Japan. Smart meters and HEMS make it possible to connect physical information (in the real world) via a sensor network utilizing powerful computing capabilities in cyber space, and to control smart home electronics via ECHONET Lite for more efficient electricity control.<\/p>\n In order to develop this kind of next-generation EMS, it is necessary to develop research in relevant fields such as solar power generation, electric vehicles, and housing (meaning a smart house by HEMS) in addition to the electric power system, and to accumulate and integrate relevant insights. To develop this research, The Advanced Collaborative Research Organization for Smart Society which is comprised of seven laboratories was established.<\/p>\n Industry-academia collaboration is essential for applying research results. We established the Study Group for Smart Society Technology to examine the smart society from a manufacturing perspective and the Promotion Association for Smart Society Technology to examine it from a user perspective.<\/p>\n In addition to all \u201cAll Waseda,\u201d the goal for this world class team involving JST\u2019s CREST is to bring about a smart and sustainable society through next-generation EMS while relying on fossil fuels as little as possible. Energy innovation taking place in Japan has the potential to transform the world and solve global energy issues. We are committed to our research activities day in and day out.<\/p>\n Click here for part 1 of this series<\/a><\/p>\n Yasuhiro Hayashi \/ Professor of the Department of Electrical Engineering and Bioscience, Graduate School of Advanced Science and Engineering, and Chairman of the Advanced Collaborative Research Organization for Smart Society<\/p>\n 1989: Graduated from Waseda’s Department of Electric Engineering, School of Science and Engineering<\/p>\n 1991: Graduated from Master\u2019s Program at Waseda’s Graduate School of Science and Engineering<\/p>\n 1994: Graduated from Doctoral Program at Waseda’s Graduate School of Science and Engineering where he obtained a doctorate in engineering<\/p>\n 2009: Became a Professor at Waseda\u2019s School of Advanced Science and Engineering after working as a lecturer at the Ibaraki University\u2019s College of Engineering and an Associate Professor at University of Fukui\u2019s Faculty of Engineering.<\/p>\n December 2009: Became Director of Research Institute for Advanced Network Technology (RIANT).<\/p>\n July 2014: Became Chairman of the Advanced Collaborative Research Organization for Smart Society (ACROSS).<\/p>\n \u25a0 Recent media news<\/p>\n 2015: Waseda University ACROSS, The Institute of Applied Energy and Kobe Steel, Ltd. co-developed insulated compressed air energy storage system<\/span>\u3000<\/a><\/p>\n 2015: ACROSS Chairman Hayashi selected as JST-CREST Strongest Team Research Directo<\/span>r<\/a><\/p>\n \u25a0 Academic Papers<\/p>\n Distribution network verification for secure restoration by enumerating all critical failures<\/a>![\"hayashi2-3\"](\"http:\/\/www.waseda.jp\/top\/assets\/uploads\/2015\/07\/hayashi2-3.png\")
Profile<\/h5>\n
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<\/p>\nAcademic achievements<\/b><\/h5>\n
\nInoue, T., Yasuda, N., Kawano, S., Takenobu, Y., Minato, S. I. & Hayashi, Y. 2015 Mar 1
\nIEEE Transactions on Smart Grid. 6, 2, p. 843-852<\/p>\n