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:

| Serial Number | Patent Name | Patent Type | Legal Status | Application Number | Application Date | Publication Number | Publication Date | Inventors | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | A Method, Device, Equipment, and Storage Medium for Controlling Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202610106382.9 | 2026-01-27 | CN121576222A | 2026-02-27 | Wang Ruiliang, Lu Junting, Chen Qian, Yang Chong, Wang Zhen, Feng Le | | 2 | A Multi-Degree of Freedom Cantilever Lifting Device | Invention Patent | Effective for Substantive Examination, Published | CN202610101163.1 | 2026-01-26 | CN121573614A | 2026-02-27 | Cui Feng, Xu Yinjie, Zhang Tingting, Li Hongfeng, Yan Shikuan, Zhang Xinwei, Xu Zhenyuan | | 3 | A Real-Time Control Method, Device, and Equipment for Wind Turbines Based on Thrust Estimation | Invention Patent | Effective for Substantive Examination, Published | CN202610014515.X | 2026-01-07 | CN121474051A | 2026-02-06 | Mou Zheyue, Wang Ruiliang, Lu Junting, Zhang Peicheng, Chen Qian, Wang Xiao, Xu Yili, Jin Huabin, Fan Zenghui | | 4 | A Torque Control Method, Device, Equipment, and Medium for Wind Turbines | Invention Patent | Published | CN202610014816.2 | 2026-01-07 | CN121630640A | 2026-03-10 | Xia Zhaoshun, You Yunhan, Li Ya, Liu Weijiang, Zhan Yangyan | | 5 | An Offshore Wind Power Doubly Fed Generator and Its Cabin System and Cooling Method | Invention Patent | Authorized | CN202610003017.5 | 2026-01-05 | CN121452142B | 2026-03-17 | Chen Zhongya, Lv Xufeng, Zhou Mengyu, Liang Bin, Ji Xu, Liu Yibei, Chen Tong | | 6 | A Cabin System and Wind Turbine for Deep-Sea Floating Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202511989522.3 | 2025-12-26 | CN121408166A | 2026-01-27 | He Xianhao, Chen Zhongya, Zhou Mengyu, He Junwei, Li Tao, Lv Xufeng, Chen Tong, Liang Bin, Ji Xu, Liu Yibei | | 7 | A Backup Power Storage Energy Analysis Method, Device, and Medium for Variable Pitch Systems | Invention Patent | Published | CN202511975890.2 | 2025-12-25 | CN121710426A | 2026-03-20 | Zhan Shaohui, Wang Qingfeng, Wang Qingfu, Liu Jie, Li Shihao, Chen Yu | | 8 | A Hoisting Device for the Inner Ring of a Conical Roller Bearing Used in Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202511924216.1 | 2025-12-19 | CN121376800A | 2026-01-23 | Lu Qingfeng, Cui Feng, Yan Shikuan, Li Hongfeng, Chen Bo, Wang Yiqing, Chen Lifeng, Sun Chaoyang | | 9 | A Control Method for Coordinated Inertia Response Between Wind Farms and Energy Storage | Invention Patent | Effective for Substantive Examination, Published | CN202511915949.9 | 2025-12-18 | CN121618497A | 2026-03-06 | Li Wei, Liu Jianyu, Qiu Jian, Zheng Weijian, Zhao Haiyan, Gao Kai, Wang Ruiliang, Chen Yaoji, Chen Qian, Deng Liping, Chen Feng, Yang Chong, Zhang Jinghan, Shan Zongjun, Wu Qian | | 10 | A Design and Performance Prediction Method, Device, Equipment, and Medium for Wind Turbine Blades | Invention Patent | Published | CN202511899342.6 | 2025-12-16 | CN121638054A | 2026-03-10 | Yang Yuxin, Bai Lu, Bai Cong'er, Liu Yong, Wang Xiaofang, Yu Zhaosheng | | 11 | A Method, Device, Equipment, and Storage Medium for Determining the Anti-Storm Performance of Yaw Motors | Invention Patent | Published | CN202511873248.3 | 2025-12-12 | CN121676279A | 2026-03-17 | Li Ya, Gao Liqun, Lou Yufang, Zhang Wei, Huang He'ao | | 12 | A Ventilation Control Method, System, Offshore Doubly Fed Generator, and Storage Medium for Slip Rings | Invention Patent | Published | CN202511823916.1 | 2025-12-05 | CN121557066A | 2026-02-24 | Qian He, Ge Yao, Zhao Zhijian, Lin Honghui, Xiang Feng, Yao Yingcong | | 13 | A Defect Detection Method, Device, Equipment, and Storage Medium for Wind Turbine Blades | Invention Patent | Published | CN202511817256.6 | 2025-12-04 | CN121639640A | 2026-03-10 | Wang Xin, Wang Chaoqun, Pan Donghao, Chen Tong, Zhan Yangyan | | 14 | A Fatigue Health Monitoring Method, Device, Equipment, and Medium for Wind Turbine Structures | Invention Patent | Effective for Substantive Examination, Published | CN202511768185.5 | 2025-11-28 | CN121229336A | 2025-12-30 | Mou Zheyue, Feng Xiangheng, Wang Ruiliang, Chen Qian, Zhang Peicheng, Liu Wei, Tan Shaoyi, Li Feiyue | | 15 | A Control Method, Device, and Medium for Voltage Source Type Offshore Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202511775205.1 | 2025-11-28 | CN121484887A | 2026-02-06 | Wen Desheng, Hua Bin, Yang Jing, Zhao Zhijian, Xu Guodong, Zhang Zhenxiao, Zhang Xuesong, Huang Wen'an, Wang Jinming, Du Hang, Wu Qian, Chen Kekun | | 16 | A Vibration Frequency Analysis Method, Device, Equipment, and Medium for Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202511775210.2 | 2025-11-28 | CN121520139A | 2026-02-13 | Liu Wei, Zhao Haiyan, Wang Ruiliang, Chen Qian, Zhang Peicheng, Zhang Changchun, Yang Chong, Qiu Huijie | | 17 | A Fault Handling Method, Device, Equipment, and Medium for Wind Turbines Based on Multi-Modal Information | Invention Patent | Authorized | CN202511714475.1 | 2025-11-21 | CN121167314B | 2026-03-20 | Hu Mengting, Wang Lin, Zhu Changjiang, Chen Jing, Zhang Wenqing, Wu Luyu, Sun Jingyu | | 18 | A Method, System, Electronic Device, and Storage Medium for Optimizing Blade Aerodynamic Stability | Invention Patent | Effective for Substantive Examination, Published | CN202511697774.9 | 2025-11-19 | CN121502950A | 2026-02-10 | Wang Ruiliang, Chen Zeshua, Feng Xiangheng, Chen Qian, Zhang Peicheng, Xu Yili | | 19 | A Defect Detection Method, Computer Program Product, and Equipment for Wind Turbine Blades | Invention Patent | Effective for Substantive Examination, Published | CN202511641700.3 | 2025-11-11 | CN121437481A | 2026-01-30 | Wang Chaoqun, Wang Xin, Chen Weixiang, Liu Weijiang, Pan Donghao | | 20 | A Method, Device, Equipment, and Medium for Determining the Fatigue Level of Wind Turbine Hubs | Invention Patent | Effective for Substantive Examination, Published | CN202511609456.2 | 2025-11-05 | CN121413372A | 2026-01-27 | Cai Li, Weng Haiping, Chen Chen, Wang Xiaoyuan, Ding Jie | | 21 | A Method, Device, and Medium for Analyzing Electrical Components of Floating Wind Turbine Cabins | Invention Patent | Authorized | CN202511604586.7 | 2025-11-05 | CN121051400B | 2026-02-24 | Chen Zhongya, Liang Bin, Liu Yibei, Zhou Mengyu, He Xianhao, He Junwei | | 22 | A Performance Indicator Prediction Method, Device, Equipment, and Medium Based on Industrial Process Monitoring | Invention Patent | Authorized | CN202511596602.2 | 2025-11-04 | CN121093793B | 2026-01-30 | Wang Lin, Meng Wenchao, Cheng Chenguang, Li Shizhong, Luo Yongshui, Yang Qinmin, He Jingtai | | 23 | A Multi-Modal Turbulent Wind Speed Time Series Field Generation Method, Device, Equipment, and Medium | Invention Patent | Effective for Substantive Examination, Published | CN202511599349.6 | 2025-11-04 | CN121457375A | 2026-02-03 | Zhang Tiao, Shen Xinhe, Liu Yuxin, Chen Ruian, Liu Yong | | 24 | A Passive Suppression Device for Bearing Pseudo-Bursh Indentation, Rotating Machinery | Invention Patent | Effective for Substantive Examination, Published | CN202511584160.X | 2025-10-31 | CN121345945A | 2026-01-16 | Zhu Yanwei, Wen Junwei, Jin Hangbo, Xiang Feng, Zhao Zhijian, Luo Yongshui | | 25 | A Wind Farm Model Aggregation Method, Device, and Medium for Doubly Fed Wind Turbines | Invention Patent | Authorized | CN202511574130.0 | 2025-10-31 | CN121052012B | 2026-02-06 | Chen Jiangang, Zhao Zhijian, Yu Qingqing, Wang Hongyi, Sun Han, Zhang Shuhan, Luo Kangda | | 26 | A Non-Intrusive Image Capture and Storage Device, Method | Invention Patent | Authorized | CN202511574134.9 | 2025-10-31 | CN121078191B | 2026-02-06 | Dai Jianjun, Luo Fan, Zhao Haiyan, Wang Lin, Zhou Mengyu | | 27 | A Method and Device for Determining the Optimal Position of Damping Controllers for Grid-Type Doubly Fed Wind Turbines | Invention Patent | Effective for Substantive Examination, Published | CN202511520597.7 | 2025-10-23 | CN121111583A | 2025-12-12 | Nian Hang, Huang Xudong, Zhao Zhijian, Hu Bin, Zhang Zhenxiao, He Zhen, Chen Zhengang | | 28 | A Decision-Making Method, Device, Electronic Device, and Medium for Wind Farms | Invention Patent | Effective for Substantive Examination, Published | CN202511495333.0 | 2025-10-20 | CN121365731A | 2026-01-20 | Zhang Dongliang, Zhao Zhengqiang, Wang Lin, Luo Fan, Dai Jianjun | | 29 | A Method, Device, Equipment, and Medium for Applying Aerodynamic Loads | Invention Patent | Effective for Substantive Examination, Published | CN202511496958.9 | 2025-10-20 | CN121430997A | 2026-01-30 | Wang Ruiliang, Feng Xiangheng, Chen Zeshua, Chen Qian, Zhang Shengjun, Zhang Peicheng | | 30 | A Method, Device, and Medium for Active Support Control of Wind Turbines | Invention Patent | Authorized | CN202511461444.X | 2025-10-14 | CN120955824B | 2026-02-10 | Chen Jiangang, Zhao Chen, Wu Qian, Zhao Haiyan, Wang Lin, Zhao Zhijian, Dai Jianjun, Xu Jinsong, Zhang Yu, Ge Yingqi, Zhang Yu | | 31 | A Method, Device, Equipment, and Storage Medium for Detecting Dirt on Radar Lenses | Invention Patent | Authorized | CN202511458180.2 | 2025-10-13 | CN120928302B | 2026-01-23 | Chen Jiangang, Wang Ruiliang, Sun Jingyu, Xiang Bochao, Wang Lin, Zhu Changjiang, Wang Zhen, Zhou Mengyu, Feng Le, Chen Ligong, Chen Jing | | 32 | A Capacity Configuration Method, Device, Equipment, and Medium for Wind-Solar Storage Hydrogen Ammonia | Invention Patent | Authorized | CN202511439570.5 | 2025-10-10 | CN120931032B | 2026-01-23 | Kong Weijian, Feng Lingchong, Yu Qingqing, Zhang Shuhan, Hua Bin, Wen Desheng, Zhang Zhenxiao, Wang Hongyi, Ren Kongming | | 33 | A Real-Time Compensation Method, Device, Equipment, and Medium for Wind Power Prediction Errors | Invention Patent | Effective for Substantive Examination, Published | 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