PP875H 3BSE092983R1 Focus interpretation – offshore wind power
Q1: Strategic significance of offshore wind power development?
: Far-reaching sea breeze power in China and even the world’s development potential is huge. According to the World Bank (WB), there are more than 71 billion kilowatts of offshore wind energy available globally, of which the deep sea accounts for more than 70%, but the current utilization rate of these resources is less than 0.5%. According to the latest assessment results of the National Climate Center, the technical development capacity of China’s far-reaching sea wind energy resources exceeds 1.2 billion kilowatts. Vigorously developing far-reaching sea wind power can significantly increase the scale of wind power development, enhance energy self-sufficiency, and ensure energy security; At the same time, it can promote the energy transition and provide support for achieving the goal of carbon neutrality.
Advantages of offshore wind power: offshore wind resource endowment, large area, high wind speed; Do not occupy land resources; Easy to transport large blades; Close to coastal developed cities, easy to absorb.
Q2: Why do fans get bigger and bigger?
Since 2016, domestic wind turbines have rapidly iterated from 2MW to 3-4MW and 5-6MW platforms. PP875H 3BSE092983R1 In the past three years, the onshore platforms have been divided into 6-8MW platforms and 8-12MW platforms. Offshore platforms are divided into 8-14MW platforms and 14-20MW platforms. At the same time, the diameter of the impeller has also climbed from 150 meters to 260 meters.
The most essential demand for big fans – reducing costs and making clean energy more inclusive. After large-scale, the amount of unit parts and procurement costs can be diluted, and the initial investment is reduced. When the number of large-scale fans is reduced, the corresponding land cost, construction ratio of the same installed capacity, and operation and maintenance costs will also decrease. At the same time, in the case of the same wind speed, the blade is longer, the sweeping area is larger, and the power generation is correspondingly increased, which means that the large-scale will also increase the utilization hours of the fan and increase the effective power generation.
However, the increasing size of the fan means that the reliability and manufacturing requirements of the product are increasingly high. Compared with the single drive system, the dual-drive variable pitch scheme has stronger stability, and can effectively improve the mechanical load of the variable pitch drive of ultra-large wind turbines, thus increasing the service life of the units.
Q3: What is the largest single capacity offshore wind turbine in the world?
: 18MW
At 23:30 on June 26, the 18MW semi-direct drive offshore wind turbine independently developed by Dongfang PP875H 3BSE092983R1 Wind Power successfully connected to the grid in Shantou Wind Power Coastal Test Base in Guangdong Province, once again breaking the world record for the largest single capacity of grid-connected wind turbines.
The wind turbine diameter of the unit is 260 meters, the blade sweep area is more than 53,000 square meters, about 7.4 standard football field area, one turn can generate about 38 degrees of electricity, a single unit can generate an average of 72 million KWH per year, can meet the electricity demand of about 36,000 households for a year. It can save more than 22,000 tons of standard coal and reduce carbon dioxide emissions by more than 59,000 tons.
