Yunda Share Co. Applies for Variable Pitch Power Supply Patent, Addressing Standby Power Assessment Challenges and Enhancing Wind Turbine Operation Safety

March 24 News: According to information from the National Intellectual Property Administration, Yunda Energy Technology Group Co., Ltd. has applied for a patent titled "Method, Device, and Medium for Energy Storage Analysis of Backup Power System in Pitch Control." The application publication number is CN121710426A, the application number is CN202511975890.2, the publication date is March 20, 2026, and the application date is December 25, 2025. The inventors are Zhan Shaohui, Wang Qingfeng, Wang Qingfu, Liu Jie, Li Shihao, and Chen Yu. The patent agency is Beijing Jiajia Intellectual Property Agency Co., Ltd., with patent agent Yao Luhua. The classification codes are H02J3/466, H02J9/06, H02J101/28.

The patent abstract states: This application discloses a method, device, and medium for analyzing energy storage in a backup power system of a pitch control system; it relates to wind turbine generators and addresses the issues of lacking effective energy assessment methods for existing backup power supplies and difficulty in ensuring emergency pitch energy needs. The method first records the calibration time when the backup power is initially discharged from rated voltage to the minimum operating voltage. During operation, it repeatedly tests at preset intervals to obtain evaluation times. By calculating the ratio of these times and comparing it with a preset capacitor failure attenuation coefficient, it determines whether the energy storage meets the pitch requirement. Using the calibration time as a reference, the time ratio reflects changes in capacitor capacity, avoiding the complexity of directly measuring energy. The bus capacitor's stable voltage ensures consistent discharge current, improving assessment reliability. It can be tested on-site with existing system components without disassembly, solving the problems of traditional large equipment that is inconvenient for on-site use, and providing early warning of failure risks to enhance wind turbine operation safety.

Yunda Co., Ltd. was established on November 30, 2001, and listed on the Shenzhen Stock Exchange on April 26, 2019. Its registered address is in Hangzhou, Zhejiang Province, with its office also located in Hangzhou. The company is a leading domestic wind turbine manufacturer with strong technical accumulation and full industry chain advantages.

Yunda's main business involves the research, production, and sales of large wind turbines. It belongs to the Shenwan industry category of Power Equipment - Wind Power Equipment - Wind Turbines, with concept sectors including energy storage, offshore wind power, and wind energy.

In 2025, Yunda's operating revenue was 29.402 billion yuan, ranking first in the industry, on par with the industry average and median. Of its main business, wind turbine revenue was 26.434 billion yuan, accounting for 89.90%. Net profit was 335 million yuan, also ranking first in the industry, matching the industry average and median.

Recent patent applications by Yunda Energy Technology Group Co., Ltd. are as follows:

| No. | Patent Name | Type | Legal Status | Application Number | Application Date | Publication Number | Publication Date | Inventors | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | Wind Turbine Control Method, Device, Equipment, and Storage Medium | Invention Patent | Substantive Examination Validated & Published | CN202610106382.9 | 2026-01-27 | CN121576222A | 2026-02-27 | Wang Ruiliang, Lu Juntao, Chen Qian, Yang Chong, Wang Zhen, Feng Le | | 2 | Multi-Degree-of-Freedom Cantilever Lifting Device | Invention Patent | Substantive Examination Validated & Published | CN202610101163.1 | 2026-01-26 | CN121573614A | 2026-02-27 | Cui Feng, Xu Yinjie, Zhang Tingting, Li Hongfeng, Yan Shikuang, Zhang Xinwei, Xu Zhenyuan | | 3 | Real-Time Control Method, Device, and Equipment for Wind Turbine Based on Thrust Estimation | Invention Patent | Substantive Examination Validated & Published | CN202610014515.X | 2026-01-07 | CN121474051A | 2026-02-06 | Mou Zheyue, Wang Ruiliang, Lu Juntao, Zhang Peicheng, Chen Qian, Wang Xiao, Xu Yili, Jin Huabin, Fan Zenghui | | 4 | Torque Control Method, Device, Equipment, and Medium for Wind Turbine | Invention Patent | Published | CN202610014816.2 | 2026-01-07 | CN121630640A | 2026-03-10 | Xia Zhaoshun, You Yunhan, Li Ya, Liu Weijiang, Zhan Yangyan | | 5 | Offshore Wind Double-Fed Machine and Its Nacelle System and Cooling Method | Invention Patent | Granted | CN202610003017.5 | 2026-01-05 | CN121452142B | 2026-03-17 | Chen Zhongya, Lü Xufeng, Zhou Mengyu, Liang Bin, Ji Xu, Liu Yibei, Chen Tong | | 6 | Deep Sea Floating Wind Turbine Nacelle System and Wind Turbine | Invention Patent | Substantive Examination Validated & Published | CN202511989522.3 | 2025-12-26 | CN121408166A | 2026-01-27 | He Xianzhao, Chen Zhongya, Zhou Mengyu, He Junwei, Li Tao, Lü Xufeng, Chen Tong, Liang Bin, Ji Xu, Liu Yibei | | 7 | Backup Power Storage Energy Analysis Method, Device, and Medium for Pitch System | 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 | Cone Roller Bearing Inner Ring Lifting Tool for Wind Turbine Main Shaft | Invention Patent | Substantive Examination Validated & Published | CN202511924216.1 | 2025-12-19 | CN121376800A | 2026-01-23 | Lu Qingfeng, Cui Feng, Yan Shikuang, Li Hongfeng, Chen Bo, Wang Yiqing, Chen Lifeng, Sun Chaoyang | | 9 | Control Method for Wind Farm and Storage Co-Responsive Inertia Control | Invention Patent | 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 | Blade Design and Performance Prediction Method for Wind Turbines | 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 | Yaw Motor Anti-typhoon Performance Determination Method, Device, Equipment, and Storage Medium | Invention Patent | Published | CN202511873248.3 | 2025-12-12 | CN121676279A | 2026-03-17 | Li Ya, Gao Liqun, Lou Yufang, Zhang Wei, Huang He'ao | | 12 | Slip Ring Chamber Ventilation Control Method, System, Offshore Double-Fed Generator, and Storage Medium | 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 | Wind Turbine Blade Defect Detection Method, Device, Equipment, and Storage Medium | Invention Patent | Published | CN202511817256.6 | 2025-12-04 | CN121639640A | 2026-03-10 | Wang Xin, Wang Chaoqun, Pan Donghao, Chen Tong, Zhan Yangyan | | 14 | Fatigue Health Monitoring Method, Device, Equipment, and Medium for Wind Turbine Structure | Invention Patent | Substantive Examination Validated & 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 | Voltage Source Control Method, Device, and Medium for Offshore Wind Turbines | Invention Patent | Substantive Examination Validated & 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 Kewen | | 16 | Vibration Frequency Analysis Method, Device, Equipment, and Medium for Wind Turbines | Invention Patent | Substantive Examination Validated & 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 | Fault Handling Method, Device, Equipment, and Medium for Wind Turbine Based on Multimodal Information | Invention Patent | Granted | CN202511714475.1 | 2025-11-21 | CN121167314B | 2026-03-20 | Hu Mengting, Wang Lin, Zhu Changjiang, Chen Jing, Zhang Wenqing, Wu Luyu, Sun Jingyu | | 18 | Blade Aeroelastic Stability Optimization Method, System, Electronic Device, and Storage Medium | Invention Patent | Substantive Examination Validated & Published | CN202511697774.9 | 2025-11-19 | CN121502950A | 2026-02-10 | Wang Ruiliang, Chen Zeshuai, Feng Xiangheng, Chen Qian, Zhang Peicheng, Xu Yili | | 19 | Blade Defect Detection Method, Computer Program Product, and Equipment | Invention Patent | Substantive Examination Validated & Published | CN202511641700.3 | 2025-11-11 | CN121437481A | 2026-01-30 | Wang Chaoqun, Wang Xin, Chen Weixiang, Liu Weijiang, Pan Donghao | | 20 | Method, Device, Equipment, and Medium for Determining Fatigue Level of Wind Turbine Hub | Invention Patent | Substantive Examination Validated & Published | CN202511609456.2 | 2025-11-05 | CN121413372A | 2026-01-27 | Cai Li, Weng Haiping, Chen Chen, Wang Xiaoyuan, Ding Jie | | 21 | Floating Wind Turbine Nacelle Electrical Component Analysis Method, Device, and Medium | Invention Patent | Granted | CN202511604586.7 | 2025-11-05 | CN121051400B | 2026-02-24 | Chen Zhongya, Liang Bin, Liu Yibei, Zhou Mengyu, He Xianzhao, He Junwei | | 22 | Performance Indicator Prediction Method, Device, Equipment, and Medium Based on Industrial Process Monitoring | Invention Patent | Granted | CN202511596602.2 | 2025-11-04 | CN121093793B | 2026-01-30 | Wang Lin, Meng Wenchao, Cheng Chenguang, Li Shizhong, Luo Yongshui, Yang Qinmin, He Jingtai | | 23 | Multimodal Turbulent Wind Speed Time Series Generation Method, Device, Equipment, and Medium | Invention Patent | Substantive Examination Validated & Published | CN202511599349.6 | 2025-11-04 | CN121457375A | 2026-02-03 | Zhang Tiao, Shen Xinhe, Liu Yuxin, Chen Ruiyan, Liu Yong | | 24 | Passive Suppression Device for Pseudo-Boussinesq Contact Pits in Bearings, Rotating Machinery | Invention Patent | Substantive Examination Validated & Published | CN202511584160.X | 2025-10-31 | CN121345945A | 2026-01-16 | Zhu Yanwei, Wen Junwei, Jin Hangbo, Xiang Feng, Zhao Zhijian, Luo Yongshui | | 25 | Wind Farm Model Aggregation Method, Device, and Medium for Bifurcated BDF Wind Turbines | Invention Patent | Granted | CN202511574130.0 | 2025-10-31 | CN121052012B | 2026-02-06 | Chen Jiangang, Zhao Zhijian, Yu Qingqing, Wang Hongyi, Sun Han, Zhang Shuhan, Luo Kangda | | 26 | Non-Invasive Image Capture and Storage Device, Method | Invention Patent | Granted | CN202511574134.9 | 2025-10-31 | CN121078191B | 2026-02-06 | Dai Jianjun, Luo Fan, Zhao Haiyan, Wang Lin, Zhou Mengyu | | 27 | Optimal Position Determination Method and Device for Damping Controller of Grid-Connected Double-Fed Wind Turbine | Invention Patent | Substantive Examination Validated & Published | CN202511520597.7 | 2025-10-23 | CN121111583A | 2025-12-12 | Nian Heng, Huang Xudong, Zhao Zhijian, Hu Bin, Zhang Zhenxiao, He Zhen, Chen Zhengang | | 28 | Auxiliary Decision-Making Method, Device, Electronic Equipment, and Medium for Wind Farm | Invention Patent | Substantive Examination Validated & Published | CN202511495333.0 | 2025-10-20 | CN121365731A | 2026-01-20 | Zhang Dongliang, Zhao Zhengqiang, Wang Lin, Luo Fan, Dai Jianjun | | 29 | Aerodynamic Load Application Method, Device, Equipment, and Medium | Invention Patent | Substantive Examination Validated & Published | CN202511496958.9 | 2025-10-20 | CN121430997A | 2026-01-30 | Wang Ruiliang, Feng Xiangheng, Chen Zeshui, Chen Qian, Zhang Shengjun, Zhang Peicheng | | 30 | Active Support Control Method, Device, and Medium for Wind Turbine | Invention Patent | Granted | 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 | Dirt Detection Method, Device, Equipment, and Storage Medium for Wind Power Radar Lens | Invention Patent | Granted | CN202511458180.2 | 2025-10-13 | CN120928302B | 2026-01-23 | Chen Jiangang, Wang Ruiliang, Sun Jingyu, Xiang Boxiao, Wang Lin, Zhu Changjiang, Wang Zhen, Zhou Mengyu, Feng Le, Chen Ligong, Chen Jing | | 32 | Capacity Allocation Method, Device, Equipment, and Medium for Wind-Solar-Hydrogen-Ammonia Storage | Invention Patent | Granted | 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 | Real-Time Compensation Method, Device, Equipment, and Medium for Wind Power Prediction Error | Invention Patent | Substantive Examination Validated & Published | CN202511436097.5 | 2025-10-09 | CN121192852A | 2025-12-23 | Wang Xiaobo, Pan Donghao, Liu Yong, Xue Shuhang, Zhu Xuehui, Lei Tian, Zhan Yangyan, Liu Weijiang, Wang Hao, Guo Baicheng | | 34 | Medium-Voltage Double-Fed Wind Turbine Reactive Power Closed-Loop Control Method, Device, and Medium | Invention Patent | Substantive Examination Validated & Published | CN202511400446.8 | 2025-09-28 | CN121012135A | 2025-11-25 | Li Shihao, Wu Keyi, Chen Kewen, Wang Lin, Wang Ruiliang, Li Tao, Chen Jing, Zhu Changjiang, Dong Yaolong, Xiang Boxiao, Hu Jin, Zhang Wei, Zhang Yu | | 35 | Aluminum Alloy Conductor Cable Suitable for Wind Power Turbines | Invention Patent | Substantive Examination Validated & Published | CN202511369728.6 | 2025-09-24 | CN121171703A | 2025-12-19 | Ye Yian, Zhang Tingting, Zhou Mengyu, Tang Yujuan | | 36 | Fault Diagnosis Method for Smart Meters Based on Distributed Data Compression | Invention Patent | Granted | CN202511367743.7 | 2025-09-24 | CN120873819B | 2026-01-02 | Meng Wenchao, Wang Lin, Yang Qinmin, Chen Jiangang, Chen Xuechao, Luo Yongshui, Chen Jiming | | 37 | Floating Wind Turbine Thrust Constraint Robust Adaptive Pitch Control Method | Invention Patent | Substantive Examination Validated & Published | CN202511344266.2 | 2025-09-19 | CN121432859A | 2026-01-30 | Meng Wenchao, Wang Lin, Yang 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Published | CN202511235110.0 | 2025-09-01 | CN121035398A | 2025-11-28 | Li Yongchao, Sun Yong, Rao Qing, Ren Fufu, Ren Hongwei, Ou Yu Liu | | 42 | Hybrid Tower Defect Detection Model Training Method and Hybrid Tower Defect Detection Method | Invention Patent | Substantive Examination Validated & Published | CN202511212539.8 | 2025-08-28 | CN121095731A | 2025-12-09 | Xia Zhaoshun, Li Ya, Zhan Yangyan, Ye Yang, Liu Weijiang | | 43 | Support Leg Tower Foundation Device and Manufacturing & Installation Method | Invention Patent | Substantive Examination Validated & Published | CN202511207010.7 | 2025-08-27 | CN121088015A | 2025-12-09 | Yang Shuchao, Luo Yongshui, Geng Fei, Zhang Gang, Ying Huadong, Zhao Haiyan | | 44 | Multi-Model Wind Turbine SCADA Domain Self-Adaptive Pretraining Method, Device, and Medium | Invention Patent | Granted | CN202511204245.0 | 2025-08-27 | CN120725069B | 2025-12-26 | Wang Lin, Yang Qinmin, Wang Ruiliang, Chen Qi, Sun Song, Meng Wenchao, Li Chao, Zhang Kai | | 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