64.6MW Solar Plant to Be Built With 17.5MWh Battery in Hokkaido (page 2)

Toshiba, TMEIC design entire system

2017/05/09 20:56
Kenji Kaneko, Nikkei BP Intelligence Group, CleanTech Institute
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SB Energy and Mitsubishi UFJ Lease & Finance plan to start construction of the plant in May 2017, aiming to start operations in fiscal 2020. The plant will be installed on about 900,000m2 (about 90ha) of land owned by Tomatoh (Tomakomai City, Hokkaido).

The plant will be run by Tomatoh Abira Solar Park 2 LLC, a fifty-fifty joint venture between SB Energy and Mitsubishi UFJ Lease & Finance. It is expected to generate about 71,477,000kWh of electricity, which is equivalent to the amount consumed by 19,854 households, per year.

Output fluctuation reduced by '1% per minute'

SB Energy and Mitsubishi UFJ Lease & Finance decided to install the storage battery to comply with the "Technical Requirements Regarding Measures to Reduce Output Fluctuation of Solar Power Generation Facilities," which Hokkaido Electric Power Co Inc (HEPCO) announced in April 2015.

The requirements are targeted at "measures against short-period fluctuation," which reduce the impact of the rapid fluctuation of solar power plants on the frequency of a power grid. After the amount of grid connection applications exceeds 400MW, HEPCO requires 2MW and higher-output solar power plants to comply with those technical requirements and install a storage battery.

Specifically, as an index, HEPCO announced the "fluctuation rate of 1% per minute," which reduces the fluctuation of the rated output of a mega solar plant to less than 1% of the rated output of PV inverters per minute in terms of power adjusted by charging/discharging a storage battery.

Mega solar plants that use a storage battery for measures against short-period fluctuation are operating in Tokunoshima (the Kyushu region of Japan) and Hidaka-cho, Hokkaido (See related article 2). In addition, several projects are underway in Hokkaido to build such power plants.