NTN Signs a First Virtual PPA with Cosmo eco Power
May 13, 2025
- Utilizing Cosmo Eco Power's Chuki Wind Farm for Wind Power Generation
NTN Corporation (Eiichi Ukai, Representative Executive Officer, President; hereafter “NTN”) and Cosmo Eco Power Co., Ltd. (Fumiaki Nokura, Representative Director, CEO; hereafter “Cosmo Eco-Power”), a group company of COSMO ENERGY HOLDINGS CO., LTD. (Shigeru Yamada, Representative Director, Group CEO), have signed its first virtual PPA (a contract to directly purchase only the environmental value of the electricity generated, hereinafter “this PPA”) on May 7, 2025.
A corporate PPA (Power Purchase Agreement) is a contract under which a consumer purchases renewable energy directly from a power producer. A virtual PPA, meanwhile, is a type of agreement where the consumer procures only the environmental value of renewable energy generated at a dedicated power plant located at a site rather than their own.
The power plant subject to this PPA is the Chuki Wind Farm operated by Cosmo Eco Power, which began commercial operations in April 2021, and supplies electricity to the Kansai region where NTN also operates. The operating wind turbines are equipped with NTN bearings and Wind Doctor™, a Condition Monitoring System (CMS) designed for use in monitoring and preventive inspections of operating conditions. For Cosmo Eco Power, it is also the first case to conclude PPA with the supplier of the generator components.
Conceptual diagram of this virtual PPA
This PPA is expected to enable NTN to receive approximately 10 million kWh worth of environmental value (non-fossil certificates) associated with electricity generated at Chuki Wind Farm per year over a 16-year period and to reduce CO2 emissions by approximately 4,200 tons (equivalent to the emissions for approximately 1,700 households) per year.
NTN and Cosmo Eco Power, as partners who have supported wind turbines in Japan for many years, and we will continue to accelerate each other's efforts to realize a carbon neutral society.
“Chuki Wind Farm”
Power Plant overview
| Power plant name | Chuki Wind Farm |
|---|---|
| Location | Hirogawa, Hidakagawa, and Aridagawa in Wakayama Prefecture |
| Facility capacity | 48,300 kW(2,100 kW×23 base) |
Condition Monitoring System (CMS) “Wind Doctor™”
This system collects data such as vibration from sensors attached to the drive trains (main shaft, gearbox, and generator) in nacelle of wind turbines. It detects abnormalities in bearings and gears at an early stage. The collected data is managed by a dedicated cloud server and analyzed by dedicated software. As NTN's data monitoring and diagnostics service is also highly evaluated, it is currently installed in approximately three hundred wind turbines in Japan.
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