Battery-equipped PV System Utilized at Time of Power Failure (page 2)

2019/11/14 13:49
Sousuke Kudou, technical writer
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The inside of the school was very dangerous because, for example, glass objects were broken and corridors were flooded. However, electricity was available because of the PV system, and it was possible to remove glass pieces scattered in classrooms and corridors by using vacuum cleaners, Kyonan Elementary School Principal Higuchi said.

In addition, in Nagano City, which was afflicted by Typhoon No 19 (which hit Japan Oct 12, 2019), PD Japan (local company) lent an uninterruptible power supply (UPS) system to local shelters that lost power, for free, contributing to restoration activities including information collection.

Specifically, PD Japan provided a 100W model of the "MSD-Box" supporting anti-disaster measures. It is a hybrid power supply system that can also be used in normal times, using both commercial power and solar electricity. In the case of a power outage, it stores solar electricity by using an independent circuit and supplies electricity from its storage battery during nighttime hours.

In the case of Typhoon No 19, banks collapsed over 70m in Hoyasu District in the morning of Oct 13, 2019, flooding an area that stretches over about 5km in the north-south direction and 2km in the east-west direction, with the estimated maximum flood depth of 4.3m.

Mud water also flowed into Toyono Branch Office of Nagano City, which is located about 3.5km away from the collapse point and used as a shelter in Toyono District. And a high-voltage power-receiving unit that relays electricity generated with an emergency generator to other buildings sank under water. As a result, the office lost power.