Today (May 30), China's first tidal light complementary photovoltaic power station, Zhejiang Wenling tidal light complementary intelligent power station of Longyuan Power of national energy group, has realized full capacity grid connected power generation. This is also the first innovative application of complementary development of solar energy and moon tidal energy in China.
Wenling tidal light complementary intelligent power station is a new type of power station that utilizes the tidal energy generated by solar photovoltaic and lunar gravity, with a total installed capacity of 100 MW. By controlling the period and power of tidal power generation, the fluctuation of photovoltaic power generation can be effectively suppressed. It can not only effectively improve the comprehensive and efficient utilization of energy, but also ensure the security and stability of new energy power grid access.
Fengshuchen, deputy general manager of the national energy group: it has created a new mode of comprehensive utilization of new energy, namely, the coordination of tide and photovoltaic, and "power generation over and under water". It not only effectively excavates and expands the utilization space, but also effectively helps innovation drive to improve the quality of development, which is conducive to accelerating the adjustment of energy structure and industrial upgrading.
The intelligence and automation of Wenling tidal light complementary intelligent power station have reached the first-class level in China, realizing few people on duty and no one on duty. The annual average power generation can exceed 100million kwh, which can meet the household power demand of about 30000 urban residents in a year. Compared with thermal power plants with the same volume, 31654 tons of standard coal can be saved every year, and 84479 tons of carbon dioxide can be reduced.
What is tide light complementary power station
How does this new type of tidal power station convert the energy of the sun and the moon into electricity? Let's get to know each other.
Tidal power station is a power station with both tidal power generation and photovoltaic power generation. When the tide rises, the seawater is stored in the reservoir, when the tide falls, the seawater is released, and the difference between high and low tide levels is used to drive the turbine to rotate, so as to make the generator generate electricity, that is, tidal power generation.
Photovoltaic power generation, that is, direct conversion of light energy into electrical energy through sunlight on silicon-based materials, thus generating current, also known as photovoltaic effect. Its power generation capacity is directly related to the lighting conditions, and is usually concentrated in the daytime with sufficient sunshine.
Based on the principle of comprehensive and efficient utilization of resources, photovoltaic panels are laid on the water surface of the reservoir area of the tidal power station, and local light resources are used for photovoltaic power generation to form a complementary power station with tidal power generation, creating a new mode of coordinated operation of tidal and photovoltaic power generation. While improving the overall electricity output, it can effectively stabilize the fluctuation of photovoltaic power generation, improve the output power quality of the power station, and maximize the development and utilization of marine resources by controlling the period and power of tidal power generation.
"Black technology" in the "sun and moon" power station
During the construction of Wenling tidal light complementary intelligent power station project, a number of innovative technologies were applied to create a new mode of comprehensive utilization of new energy for perfectly coordinated tidal and photovoltaic power generation. Let's uncover the "black technology" of this new power station that absorbs the essence of the sun and the moon.
185000 photovoltaic power generation modules are installed on the water surface with a total area of about 2000 mu in the tidal reservoir area of the power station. The daily inspection and maintenance workload is huge. UAV patrol inspection technology and AI intelligent diagnosis system are adopted in the power station to realize the functions of UAV one key cruise, fault location, report analysis, etc., which can effectively identify the abnormal conditions of equipment. The intelligent UAV patrol inspection technology can greatly reduce the manpower required for patrol inspection, save operation and maintenance costs, and effectively improve the efficiency and accuracy of patrol inspection. The staff can realize the remote monitoring and control of the equipment by sitting in the main control room.
Tang Jian, general manager of Longyuan Power of China National Energy Group: we have developed and built a digital production platform. Relying on transparent data, we have established a health early warning model for wind and solar equipment, which can be used for rapid remote diagnosis. At present, the accuracy rate of the model has exceeded 85%, realizing the transformation from "people looking for information" to "information looking for people". The equipment operation and maintenance has changed from passive to active, effectively ensuring the economic benefits of the power station.
Booster station is the key link of power conversion to the Internet. The chaoguang complementary power station adopts the innovative building mode - prefabricated cabin mode, realizing a high degree of integration of cabin equipment in the factory. During construction, it is hoisted in place like building blocks. The construction efficiency is greatly improved, and this alone shortens the construction period of 2 months. After installation and operation, constant temperature, humidity and dust-free can be realized in the cabin, which can effectively isolate the corrosion of salt fog and dust intrusion at the sea, and greatly improve the reliability of equipment operation.
This tidal light complementary power station can not only generate electricity, but also has a huge "power bank", which is the supporting 5-megawatt-hour energy storage equipment. With it, it can effectively ensure the stability and safety of the electricity generated into the power grid. Among them, how to quickly and effectively suppress the fluctuation of power generation of grid connected photovoltaic power stations is the key point.
Zhangjiangfeng, the full-time network source coordination technician of State Grid Zhejiang Electric Power Research Institute: Wenling chaoguang project makes full use of the charging and discharging replacement of energy storage system and the millisecond power rapid response characteristics to effectively change it from "adapting to grid operation" to "supporting grid operation", which is of great significance to the construction of new power systems.
China's photovoltaic energy has entered a period of rapid development
According to the data of the national energy administration, the newly added PV grid connected installed capacity in China in 2021 was 54.88 million KW, reaching a record high.
As a new energy with wide application and quick effect, in recent years, the rapid development trend of photovoltaic energy in China has been formed.
In recent years, China's energy enterprises have accelerated the construction of photovoltaic energy projects. The construction of Aihua agriculture and animal husbandry photovoltaic, Shimenkan agriculture photovoltaic and azutian agriculture photovoltaic projects of Huaneng Group in Lincang City, Yunnan Province is accelerating, and it is expected that they will be connected to the grid and put into operation on June 30; Datang Group plans to start 10million kW of new energy projects this year, including 6.65 million kw of photovoltaic power, accounting for 2/3 of the total new energy projects; In the first April of this year, the state power investment group started the construction of 150 MW photovoltaic hybrid power generation project and distributed photovoltaic project in Ningxia and Guangdong respectively. At the same time, the 1.3 million KW photovoltaic project in Macheng, Hubei is also under construction.
According to the latest data from the national energy administration, up to now, 121million kilowatts of photovoltaic power generation projects are under construction. From January to April this year, 16.88 million kw of photovoltaic power generation was newly connected to the grid, an increase of 126.7% year on year. It is estimated that 108million kilowatts of photovoltaic power generation will be newly connected to the grid in the whole year, with an increase of 95.9% over the previous year. China has become the promoter and leader of the global photovoltaic industry.