Published papers

We live in a very connected world. As the world gets even more connected with the proliferation of connected devices, i.e., Internet of Things (IoT), a paradigm shift will happen in an electric utility system that relies on the mandatory balance of demand and supply. Balancing capabilities must be on standby at the power grid network to fulfill this requirement, showing high dependency on large-scale power plants on the supply side. However, Demand-side Energy Management System (D-EMS) accumulate loads like an air conditioner with network access is becoming the catalyst in influencing the design of the demand and supply balancing formula. IEEE 1547 standards family describe that Demand Response (DR) Aggregator acquires balancing capacities by aggregating DR units, namely Virtual Power Plant (VPP). This research presented and verified that aggregation of D-EMSs that refers to the accumulation of loads with network access like air conditioners showing a characteristic of Distributed Energy Resources (DERs), realized VPP with offering scalability. Significantly, the measurement of D-EMS by a smart power meter with the certification of the centralized authority was able to ensure transparency in VPP as a whole system, removing the weakness of a distributed system.

COVID-19 crisis is ascending the needs of distance learning. Keio University has been engaging in the revision of educational ICT policies in Japan for many years, however Japanese school network guideline by Ministry of Education, Culture, Sports, Science, and Technology, Japanese Government (hereinafter refer to MEXT) regulated every school to depend on a dedicated line for many years. In December 2019, the new educational network guideline announced by MEXT paved the way that every school launches distance learning class on public cloud service through the internet access via a public network. The new guideline mandated that the combination of cloud service, authentication, and encryption ensures to protect student data, unbundling the security and the network design. “Nagasaki-Takaoka Model” in which data trust is ensured on the open network has aimed to be the reference model of distance learning for K12 education in Japan. In December 2020. Takaoka City is ready to start distance learning in every elementary school and junior high school.