Kyocera unveiled the construction site of Japan's largest floating photovoltaic power plant of 13.7MW

On September 26, Kyocera announced Japan's largest floating photovoltaic power plant, the Chiba Yamakura Water Megawatt Photovoltaic Power Station,
which is under construction at the Yamakura Reservoir in Ichihara City, Chiba Prefecture.
Construction started in December 2015, and about 60% of the total construction has been completed, and the work
of attaching panels mounted on floating racks on the water surface is rapidly advancing.
Operations
are scheduled to start in FY 2017.

The main business of the power plant is Kyocera TCL Solar Co.
, Ltd
.
, jointly funded by Tokyo Sunshili Leasing and Kyocera.
Yamakura Reservoir is a reservoir for industrial water managed by the Chiba Prefectural Business Agency, and about 50,904 solar panels
are installed on floating racks using a water surface of about 180,000 m2.
The installed capacity of solar panels is about 13.
7MW, and the grid-connected output is 11.
5MW.

Solar panels are mounted on floating ebutments at the lakeside site

Kyocera Information System (KCCS) is responsible for the design and construction, and the panels are made of Kyocera products
with an output power of 270W/sheet.
The photovoltaic inverter (PCS) is manufactured by SMA Solar Technology (500kW model) in Germany, and the floating mount is made of products from Ciel Terre of France
.
Maintenance management is the responsibility
of Kyocera Solar Corporation.

In order to prevent the floating platform from moving with the wind, etc.
, more than 400 mooring cables are connected
to anchors fixed at the bottom of the lake.
It is said that in order to ensure the pulling strength of the anchor, the actual construction began after repeated tests
.
The maximum water depth of the Yamakura Reservoir exceeds 10m, and there is no sunlight, which is measured by lighting
.
KCCS says "it's important to ensure skilled divers.
"

In the panel installation operation, the panels are first installed on a floating platform on land, and an array of 14 panels is connected (panel installation), and then connected to a panel installation site (floating solar panels) on the water by boat.

It is said that one of the problems of the water million photovoltaic power plant is that the cable will become longer
.
For this reason, the PCS and booster substations on the lakeside were installed in three places, and the solar panels installed on the water surface were also divided into three zones, each connected to the nearest substation, thereby suppressing the cable length
.

In addition, it is said that the floating erection of Ciel Terre in France has been improved
according to the climate of Japan, including the construction method.
For example, when the air in the floating body expands due to high temperature in summer, the outer cover that deflates the pressure will be released, and the installation method that will not cause the battery panel to fall off in case the floating body is deformed
.
In addition, in order to withstand wind speeds of up to 41.
5 m/s, the strength
of the mooring cable is fully ensured.

The annual power generation is expected to be approximately 16.
17 million kWh
.
The purchase price is 32 yen/kWh, and the electricity
will be sold to Tokyo Electric Power Energy Partner.
Kyocera TCL Solar operates three water photovoltaic power plants in Hyogo Prefecture and one in Mie Prefecture, with the Yamakura Reservoir being the fifth power station
.
In addition, it is said that the development of
about 10 hydropower plants is also being promoted.