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At the "First International Open Energy Systems Symposium" (October 14-15, 2014), held at the OIST Institute of Technology (OIST) in Japan, houses equipped with distributed power systems consisting of solar cells and storage batteries are facing Participants are open. This is a research project being promoted by Sony Computer Science Institute, OIST, and Okinawa, which is characterized by the exchange of DC power between homes.
This "research on the verification of decentralized DC power control for the implementation of the Open Energy System (OES)" set solar energy in 9 teachers' homes (5 households of 2LDK (105m2) and 4 households of 3LDK (148m2)) in OIST. Battery board, battery and controller. The solar panel output power is 223W, which is manufactured by Panasonic. It consists of six panels, two sets of 2LDK houses (about 2.7kW total power), and three sets of 3LDK houses (total power about 4.0kW). The battery is a lithium-ion rechargeable battery using an olivine-type lithium iron phosphate as a positive electrode and manufactured by Sony. Three battery boxes with an energy capacity of 1.2 kWh are respectively provided. The solar panel generates a voltage of 180V, which is reduced to 48V by a DC-DC converter and then charged to the battery.
Three of the nine households are connected directly to each other through their own power transmission lines and can provide battery power to each other. The voltage used for power and power supply is 340-350V, and the voltage of the battery power is increased by the DC-DC converter. Increase the voltage of the power supply to a little higher than the reference voltage and send it to the receiver. The powered control section is equipped with circuit breakers to ensure safety. Truth Xiong, chairman and founder of Sony CSL, stated that "we have confirmed in the actual living environment that we can deliver DC power in both directions." The project team intends to expand the research target to 20 households in 2014. In addition, manual interoperability is now being achieved, and future efforts will be made to automatically realize power interoperability based on each household's power demand and charging capacity. The current topic is to develop an algorithm to achieve this goal. (Reporter: Takano Dun, Nikkei Technology)
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