Visit to Plant

Solar Plant Flexibly Copes With Unexpected Yellow Sand, Lightening Strike

Smooth response to output control directives through remote-controlled PV inverters

2019/04/17 10:14
Shinichi Kato, Nikkei BP Intelligence Group, CleanTech Labo
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Kyokuto Kaihatsu Kogyo Co Ltd, a manufacturer of custom-designed vehicles such as dump trucks, tanker lorries and garbage trucks, has its Fukuoka Plant in the corner of an industrial park in Iizuka City, Fukuoka Prefecture, Japan. A mega- (large-scale) solar power plant with a solar panel capacity and a PV inverter rated capacity of 1.5MW each is located at this plant site (Fig. 1).

Fig. 1: Located at the Fukuoka Plant of Kyokuto Kaihatsu Kogyo (source: Nikkei BP, bottom Kyokuto Kaihatsu Kogyo)

As this area is suited for solar power generation, a different power producer is operating another mega-solar power plant to the south.

This mega-solar plant with an output of about 1.87MW was developed by Well Holdings Co Ltd (Chuo-ku, Fukuoka City), which is engaged in real estate investment (Fig. 2, See related article)

Fig. 2: Well Holdings' mega-solar plant on an adjoining site (source: Nikkei BP)

The mega-solar plant at its Fukuoka Plant site is the first such project that Kyokuto Kaihatsu Kogyo has developed and operated. Six years have passed since the plant began selling power in March 2013. The plant sells generated power at 40 yen/kWh (excluding tax) to Kyushu Electric Power Co Inc under the feed-in tariff (FIT) scheme.

After the 1.5MW-output mega-solar plant began operation at the Fukuoka Plant, Kyokuto Kaihatsu Kogyo constructed two more solar power plants at other locations. One uses the site of the company's former Tohoku Plant in Hachinohe City, Aomori Prefecture, and has a solar panel capacity of about 1.7MW and a PV inverter rated capacity of 1.5MW. The other uses the rooftop of the Otowa Plant (Toyokawa City) of its subsidiary, Nippon Trex Co Ltd (Toyokawa City, Aichi Prefecture), and has a panel capacity of 420kW and a PV inverter capacity of 350kW (See related article 2).

Hayamizu Co Ltd (Kobe City) provided design and procurement services at both mega-solar plants in Iizuka City and Hachinohe City, while a joint venture (JV) formed by Solar Frontier KK (Minato-ku, Tokyo), Hayamizu and Obayashi Road Corp constructed both plants, adopting the solar panels of Solar Frontier and PV inverters of Toshiba Mitsubishi-Electric Industrial Systems Corp (TMEIC) (Fig. 3).

Fig. 3: Solar Frontier solar panels, TMEIC PV inverters (source: Nikkei BP)