scope of application

Electricity, surface photovoltaic power generation, reservoirs, lakes and other surface resources

Technology provider

Yangtze River Survey, Planning, Design and Research Co., Ltd.

Brief description of technology

Floating surface photovoltaic floating body design and array overall stability control technology use floating bodies to float photovoltaic modules on the water to generate electricity, and use overall stability control technology to achieve stable, safe and environmentally friendly operation of the photovoltaic array within 25 years, which can improve idle water surface resource utilization rate and save land resources.

technical information

This technology is a systematic project, including floating body systems, mooring systems, cable systems, power generation systems, power transmission and transformation systems, etc.

Commercial applications

The floating surface photovoltaic floating body design and array overall stability control technology have been successfully applied to the 150MW surface photovoltaic project of the Three Gorges Group of Lianghuai National Photovoltaic Demonstration Base in Anhui Province-the world's largest floating surface photovoltaic power station at that time, the Three Gorges New Energy Weishan 50MW photovoltaic power station, Jingke Shangrao Photovoltaic Super Leader 100MW surface photovoltaic project, Datang Huayin Yiyang 100MW fishing and light complementary photovoltaic power generation project, Huaneng Yueyang Sanhui Lake 20MW surface photovoltaic power generation project, Jingke Huancheng 100MW surface photovoltaic power generation project, Xiangyang Xionghe Reservoir 1.2MW surface photovoltaic power generation project, State Power Investment Corporation's key technology research and demonstration project, Singapore DCP 25kW project, Malaysia Selangor 10MW project, Datang Guangxi Yantan 139MW project, etc. Ten large-scale surface photovoltaic power stations.

Help/support you hope to receive during the technology transfer process

It is hoped to obtain policy support from the local government where the project is located and make floating surface photovoltaic power generation a priority energy situation for development so as to facilitate the advancement of the project; at the same time, it is hoped to be recommended by my government to contribute to energy conservation and emission reduction in the Belt and Road countries.

equipment investment

Taking a surface photovoltaic power generation project in Yiyang City, Hunan Province as an example, the total installed capacity of the project is 81.14MWp. The project mainly consists of monocrystalline silicon battery modules, component floats, box-inverter integrated machines, 220kV booster stations, power collection lines, transportation engineering, construction auxiliary projects and other projects. If the price of a photovoltaic module per watt is 1.5 yuan, the total dynamic investment of the project (excluding delivery) is about 260 million yuan, and the dynamic investment per kilowatt is about 3,100 yuan.~3300 yuan/kW.

Annual operation and maintenance fee

Waterborne photovoltaic power stations are usually designed on the principle of unmanned and unmanned duty, and are managed in this way. The daily maintenance and maintenance of the power station is small. The power station has 4 operation and maintenance management personnel, with an annual salary and benefits of 80,000 yuan/person. Calculated, the salary and benefits of operating personnel in normal operation years are 320,000 yuan/year. In addition, aquatic photovoltaic power stations need to carry out equipment maintenance, daily maintenance, photovoltaic module cleaning, etc. every year. Taking into account equipment depreciation costs, the total annual operation and maintenance cost is about 0.06 yuan/watt.

investment recovery period

The project is calculated based on the on-grid electricity price of 0.45 yuan/kW·h (including value-added tax). The corresponding project investment financial internal rate of return during the 20-year operation period is 8.50% before tax and 7.39% after tax; the investment payback period is 10.14 years before tax and 10.68 years after tax; the total investment return rate is 5.20%, the investment profit and tax rate is 3.98%, and the net profit rate on capital is 10.00%. The financial internal rate of return on capital is 11.58%.

added benefit

During the 20-year operation period of the project, the average annual on-grid electricity of photovoltaic power stations is 81.2746 million kWh. Compared with thermal power with the same power generation capacity, it can save 25,400 tons of standard coal every year, and correspondingly reduce exhaust emissions: about 647.8 tons of SO2, about 556.7 tons of NOx, and about 62,400 tons of CO2. It can also save 333,800 tons of water, reduce soot emissions by 270.30 tons, and reduce the pollution of water by corresponding sewage wastewater and warm drainage from thermal power stations.

comprehensive benefits

Before the construction of the Three Gorges Huainan Project, the Three Gorges Weishan Project, and the Jingke Weishan Project, the water area was a subsidence area caused by coal mining. The water area was full of abandoned fishing nets and houses that were not completely submerged. Moreover, the area was still sinking, making it impossible to build other projects, comprehensive management is difficult and costly. The implementation of this technology has transformed the former coal mining subsidence area into a green new energy base, realizing a new model of power generation on the upper water surface and aquaculture on the lower layer. It not only greatly improves the economic output per unit area, but also purifies and treats the water in the subsidence area to benefit the people on the water side. At the same time, project construction, daily maintenance and component cleaning have created a large number of jobs and increased the income of local poor households. At the same time, as an innovative water surface photovoltaic technology strongly supported by the state, this technology can realize photovoltaic power generation while reusing large areas of reservoirs formed by ash disposal yards of thermal power plants, middle ponds of sewage treatment plants, coal mining subsidence areas, lakes, reservoirs and other idle water surface resources, turning water bodies with low utilization value into waste, which can reduce water evaporation, improve the ecological environment, and increase economic income.

Level of impact of obstacles on technology transfer

no

technology maturity

The floating surface photovoltaic floating body design and array overall stability control technology have been successfully applied to the 150MW surface photovoltaic project of the Three Gorges Group of Lianghuai National Photovoltaic Demonstration Base in Anhui Province-the world's largest floating surface photovoltaic power station at that time, the Three Gorges New Energy Weishan 50MW photovoltaic power station, Jingke Shangrao Photovoltaic Super Leader 100MW surface photovoltaic project, Datang Huayin Yiyang 100MW fishing and light complementary photovoltaic power generation project, Huaneng Yueyang Sanhui Lake 20MW surface photovoltaic power generation project, Jingke Huancheng 100MW surface photovoltaic power generation project, Xiangyang Xionghe Reservoir 1.2MW surface photovoltaic power generation project, State Power Investment Corporation's key technology research and demonstration project, Singapore DCP 25kW project, Malaysia Selangor 10MW project, Datang Guangxi Yantan 139MW project, etc. Ten large-scale surface photovoltaic power stations have been in operation for more than 5 years, and are currently in good operating conditions and are highly mature technologies.

technical applicability

The design of floating water surface photovoltaic floating bodies and the overall stability control technology of the array are mainly suitable for water surface areas such as lakes, reservoirs, coal mining subsidence areas, and sewage treatment plants. The main limiting factors are: 1) Waters with wave heights higher than 1m need to make special wave protection facilities, and the feasibility and economy need to be further demonstrated;2) Waters with flow speeds greater than 1m/s need to be specially verified for the reliability of their anchoring systems; 3) In seawater, offshore and other areas, marine organisms such as barnacles may have an impact on floating bodies and anchoring systems, so the applicability of this technology needs to be further demonstrated.

technical stability

The design of floating water surface photovoltaic floating bodies and the overall stability control technology of the array are stable and have more than 6 years of continuous operation experience. The floating body is processed from high-density polyethylene material and has good mechanical properties and weather resistance. The materials used have passed drinking water safety testing and have good sanitary and environmental protection properties.

technical safety

Floating water surface photovoltaic floating body products have passed the internationally authoritative TÜV South German certification (PPP 59073A) and obtained the world's first floating body product certification certificate in the photovoltaic industry. They have passed the CBC certification of the National Solar Photovoltaic Product Quality Supervision and Inspection Center (CPVT)(CBC-001-D201900031). The product quality has passed the tests of CMA and CNAS by the International Laboratory Accreditation Cooperation Organizations, complies with EU RoHS environmental protection requirements and meets international quality standards. After the photovoltaic power station expires, the floating bodies and related materials can also be recycled and reused twice, without causing pollution to the environment.

Barriers to technology transfer and promotion

no

intellectual property transfer

It has domestic independent intellectual property rights; the equipment used in this technology has mature products at home and abroad; we are very willing to provide technical services to countries in the Belt and Road Initiative.