China's first! The 35 MW six-degree-of-freedom wind turbine test bench was completed

Recently, China's first and the world's largest 35 MW six-degree-of-freedom wind turbine test bench was officially put into operation at Sany Renewable Energy Wind Power Test Center.

The test bench is completely independently developed and designed by Sany Renewable Energy, using 100% domestic supply chain construction, and is the world's largest capable of carrying power, the highest degree of reduction, and the most comprehensive verification of the wind power transmission test bench, meeting the needs of the whole life cycle verification of 35 MW of the whole machine, and will create more possibilities for the future of large-scale wind power.

At present, China's wind power is leading the world, whether it is the design and development of large megawatts, or the digital transformation of production models, China is at the forefront. At the same time, doubts have emerged one after another that "large-scale wind power stall development cannot guarantee reliability".

How to find the optimal solution between seeking speed and stability has become an unavoidable problem in the development of wind power in China.

"The jade is polished into many instruments", this is the answer of the ancients. Thousands of years have passed,Pre-validation for the futureIt has become the only way to break the situation of wind power in contemporary China. In particular, the wind turbine test, as the last checkpoint before the official installation of the wind turbine, is responsible for the "gatekeeper" of wind turbine safety.

However, in the face of hundreds of tons of wind turbines, the requirements for large-scale, multi-degree-of-freedom, and multi-moment coupling of real working conditions, as well as the strict verification standards of multi-dimensional and high-precision, have virtually increased the difficulty of the design and construction of the test bench.

Therefore, the world's first 35 MW six-degree-of-freedom test bench developed and built by Sany Renewable Energy has been destined to be "extraordinary" in its genes from the beginning of its birth.

100% domestic genes

The iteration of large megawatt units seems to be a simple change at the megawatt level, but behind it is a series of qualitative changes in materials, components and the whole system. Therefore, when the domestic large megawatt model repeatedly refreshes the world record, it means that China has no mature foreign experience to learn from in the level of large megawatt testing and verification. In the past, the mode of direct purchase of drawings or equipment was not only expensive, but also easy to cause the "water and soil adaptation" of the built test platform.

As the "pioneer" of large megawatt wind power technology, Sany Renewable Energy chose to do the difficult but correct thing, entered the "deep water area" of wind power testing and verification, broke through the bottleneck of large megawatt multi-degree of freedom technology verification, broke the long-term foreign technology monopoly, refused to "take doctrine" and "imitate and follow", and independently designed and built a 35 megawatt six-degree-of-freedom wind power test bench "tailor-made" for domestic large megawatt models.

This whole machine test platform with 100% domestic genes,On behalf of China, it has a higher voice in the field of large-megawatt wind power verification.

A one-to-one replica of extreme wind conditions

In a real wind field, the wind is always changing, and the loads on the unit are also complex and diverse. The traditional wind turbine test bench structure can only apply loads in a single direction, which cannot simulate the force in the real environment, and the test results are difficult to be accurate enough. However, this problem has been effectively solved in Sany Renewable Energy's 35 MW six-degree-of-freedom test bench.

35 MW complete machine test benchThrough the combined configuration of 6 100-ton hydraulic cylinders, the co-loading and decoupling of six-dimensional multi-directional loads are realized, the test unit is arbitrarily stretched to the limit, and the complex working conditions of the wind field are reproduced one by one. The maximum driving torque of the test bench is 36 mega Nm (N·m), the bending moment is up to 80 trillion N·m, and more than 1,500 steel bars can be bent at the same time.Even the most "demonic" winds and the most extreme working conditions can be accurately reproduced on the test bench, the verification of the anti-platform performance of the unit is not a problem.

Both want and want, bigger and more complete

In Sany Renewable Energy's 35 MW test bench, the behemoth weighing hundreds of tons and involving thousands of precision parts is no longer an unruly "monster" that is difficult to tame.

Relying on the high-intensity accelerated life aging test, speed for time,For every 1 year of operation on the test bench, the equivalent wind farm operates for 20 yearsAt the same time, it can meet the verification requirements of equipment functional testing, failure limit verification, design simulation model verification and other verification requirements of the whole machine and generators, gearboxes, spindles and other parts, fully demonstrate the design feasibility and product reliability, and explore the technical boundaries and physical limits.

Based on thousands of sensors on the test bench, the whole process of verification is monitored online and accumulated in real time, and the product design is fed back with multi-dimensional test data, and the digital simulation model is corrected, so as to realize the full-link closed-loop from test to optimization, and ensure the reliability of the whole life cycle of the wind turbine from the source.

The successful operation of the 35 MW six-degree-of-freedom test platform is a vivid portrayal of China's wind power people's adherence to long-termism, pursuit of independent intellectual property rights, and scientific and technological self-reliance and self-reliance, proving to the world that the achievements of China's large-scale wind power are not short-lived, and we are using practical actions to escort the sustainable and high-quality development of wind power.