Solar Plant Built Through Japan's 1st 'Recruiting Process'
Frequent lightning interrupts remote monitoring
Showa Village, on a plateau, near the foot of Mt. Akagi, Gunma Prefecture, Japan, is known for its cabbage, konjac and other vegetable cultivation. The "Sun-Farm Sennennomori (Showa Village Solar Power Plant)," a mega- (large-scale) solar power plant with a total solar panel output of about 5.6MW, is situated on this plateau (Fig. 1).
This mega-solar plant is located in "Sennennomori" as its name indicates. It consists of three power plants connected with a high-voltage power grid, utilizing an industrial site in Sennennomori, which has, among other facilities, a golf course and a soccer camp facility.
The Nippon Comsys Corp Group developed, constructed and runs this power plant. The Nippon Comsys Group is well known for constructing many telecom facilities primarily for the NTT Group.
Nippon Comsys provided engineering, procurement and construction (EPC) services and operates and maintains (O&M) the mega-solar plant after completion. The power producer is Comsys Create Corp (Shinagawa-ku, Tokyo), a subsidiary of Nippon Comsys, and is engaged in new business development for the company.
Comsys Create has developed and operates solar power projects with a total output of about 61.2MW at 19 locations. According to Comsys Create, its development projects have stopped at the 19th with no more being planned right now.
Just like the power plant in Showa Village, Nippon Comsys provided EPC and O&M services at these solar plants, whose power producer is Comsys Create. Excluding the CIS chemical compound-type adopted at the 1.8MW-output plant in Azumino City, Nagano Prefecture, crystal silicon-type solar panels of various manufacturers were adopted at all the other solar plants. As for PV inverters, products of Toshiba Mitsubishi-Electric Industrial Systems Corp (TMEIC) were adopted at all 17 locations excluding the two with an output of about 12.7MW and 2MW at Rifucho, Miyagi Prefecture, and Ebetsu City, Hokkaido, respectively.