Yunda Co., Ltd. has obtained patents related to blade pitch fault warning, using operational data modeling to predict wind turbine equipment failures in advance.

On March 29, the National Intellectual Property Administration information shows that Yunda Energy Technology Group Co., Ltd. applied for a patent named “Method, Device, Equipment, and Storage Medium for Fault Early Warning of a Variable Pitch System,” with authorization announcement number CN116085217B, and the authorization announcement date is March 27, 2026. The application publication number is CN116085217A, and the application number is CN202310191548.8, with the application publication date being March 27, 2026, and the application date being February 27, 2023. The inventors are Wu Qian, Sun Yong, Zhu Changjiang, Wu Haile, and Wang Ruiliang, with the patent agency being Beijing Jija Intellectual Property Agency Co., Ltd., and the patent agent is Qian Na. The classification number is F03D17/00.

The patent abstract shows that the invention discloses a method, device, equipment, and storage medium for fault early warning of a variable pitch system, applied in the field of wind power equipment fault detection. The method includes: calculating the equivalent torque of each blade at each time interval based on the motor torque data in the mechanical operation data; calculating the correlation parameters and significance parameters between adjacent blades based on the equivalent torque of each blade; calculating the Mahalanobis distance based on the equivalent torque and the motor current data, motor temperature data, pitch angle data, and speed data in the mechanical operation data; when mechanical failure is determined based on the Mahalanobis distance, correlation, and significance level, outputting a fault early warning. The method constructs correlation models and monitoring models through mechanical operation state data to provide early warnings for mechanical component faults in wind power equipment, avoiding the situation in the prior art where fault notifications are only issued after mechanical component damage, leading to unit failure.

Yunda Co., Ltd. was established on November 30, 2001, and was listed on the Shenzhen Stock Exchange on April 26, 2019. The registered address is located in Hangzhou, Zhejiang Province, and the office address is also in Hangzhou, Zhejiang Province. The company is a leading manufacturer of wind power complete sets in China, focusing on the research and development and manufacturing of large wind turbine generators, with strong technical strength.

Yunda Co., Ltd.'s main business is the research and development, production, and sales of large wind turbine generators, belonging to the Shenwan industry of electrical equipment - wind power equipment - wind power complete sets, involving energy storage, offshore wind power, wind energy, and other concept sectors.

In 2025, Yunda Co., Ltd. achieved operating revenue of 29.402 billion yuan, ranking second among three companies in the industry. Although it is less than the first place, Goldwind Technology’s 73.023 billion yuan, it is on par with the industry median, but lower than the industry average of 38.702 billion yuan. Among its main business, the revenue from wind turbine generators was 26.434 billion yuan, accounting for 89.90%. In terms of net profit, 2025 saw 335 million yuan, also ranking second in the industry, lower than the first place, Goldwind Technology’s 3.025 billion yuan, consistent with the industry median and lower than the industry average of 789 million yuan.

The recent patent situation of Yunda Energy Technology Group Co., Ltd. is as follows:

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Editor: Xiaolang Kuai Bao