Sipower Protection Engineering and Sipower Stock apply for patents related to real-time simulation testing, real-time digital simulation automated testing, solving multi-model management and other issues.

March 24 News: According to information from the National Intellectual Property Administration, Beijing Sifang Automation Engineering Technology Co., Ltd. and Beijing Sifang Automation Co., Ltd. have applied for a patent titled “Real-time Digital Simulation Full-Process Automatic Testing System and Method.” The application publication number is CN121681355A, the application number is CN202511686374.8. The publication date is March 17, 2026, and the application date is November 18, 2025. Inventors are Zhai Kai, Fan Qi, and Xie Yasong. The patent agency is Beijing Zhihui Future Patent Agency (General Partnership), with patent agents Zhang Honglian and Zhao Qing. The classification code is G06F11/3668.

Patent Abstract: A real-time digital simulation full-process automatic testing system and method, where the automatic testing system interacts with the management server and RTDS closed-loop testing platform, storing simulation models within the RTDS platform. The system includes: test case service module, model service module, data processing service module, test execution service module, connection management service module, and knowledge base service module. The test case service module is used for preparing test cases; by modifying and compiling simulation models in cooperation with the automatic testing process, achieving fully automated detection, effectively solving issues in existing automatic testing methods such as maintenance, review, and management difficulties caused by numerous models; automatically acquiring model status and data to enable automatic handling of testing anomalies, resolving issues where manual intervention is needed to recover; additionally, it supports automatic modification and compilation of models, addressing the inability of script-based automatic testing systems to intervene in models.

Tianyancha data shows that Beijing Sifang Automation Engineering Technology Co., Ltd. was established on November 6, 2003. The legal representative is Liu Zhichao. The industry is electrical machinery and equipment manufacturing. The company is large-scale, with a registered capital of 1.05 billion RMB, paid-in capital of 1.05 billion RMB. The registered address is No. 9 Shangdi 4th Street, Haidian District, Beijing (Sifang Building, 6th Floor). The company has invested in 5 other enterprises, participated in 7,644 bidding projects, has 0 trademark information, 917 patent items, and holds 13 administrative licenses.

Recent patent applications by Beijing Sifang Automation Engineering Technology Co., Ltd.:

No. Patent Name Type Legal Status Application Number Application Date Publication Number Publication Date Inventors
1 Dynamic Stability Coordination Control Method Considering Battery Life in Wind Storage Combined System Invention Patent Published CN202610163555.0 2026-02-05 CN121663603A 2026-03-13 Yang Da, Wang Dongsheng, Yuan Zaiji, Wu Yifu, Cao Yang, Di Wei, Li Haitian, Li He, Duan Jiandong, Li Jinjun
2 Wide-Frequency Oscillation Suppression Method for High-Percentage Wind Power Integration System Based on Impedance Shaping Invention Patent Published CN202610062814.0 2026-01-19 CN121546582A 2026-02-17 Wang Xinwei, Wang Dongsheng, Yuan Zaiji, Xiao Zhongyang, Ye Zhengmao, Guo Xu, Chen Zhuo, Li He, Duan Jiandong, Zhang Yuhang
3 Adaptive Configuration-Based Intelligent Testing System and Method Invention Patent Published CN202512019672.8 2025-12-30 CN121679192A 2026-03-17 Xu Wanfang, He Tongyun, Wang Jialun, Peng Bo
4 Coordinated Control Method and System for Power and Computing Power Invention Patent Published CN202511897197.8 2025-12-16 CN121688863A 2026-03-17 Li Xiao, Guo Hailong, Zhou Yankun, Yang Yonglin, Yao Chen
5 Power Converter, Control Method, and Device for Frequency Support Invention Patent Published CN202511808529.0 2025-12-03 CN121546616A 2026-02-17 Yang Mengwei, Guan Yiweng, Shi Bianian, Wang Yi, Cheng Linkui, Sun Gang, Jin Dongxing
6 Distance Protection Method and System for Interphase Faults on New Energy Transmission Lines Invention Patent Substantive Examination in Effect, Published CN202511718931.X 2025-11-21 CN121602304A 2026-03-03 Xiong Jun, Nie Juanhong, Zhao Zhihong, Cai Xinwei, Huang Jijie, Xiao Yuanqing, Wu Yekai
7 Modular, Rapidly Reconfigurable Compact DC Control and Protection Test Platform Invention Patent Substantive Examination in Effect, Published CN202511701750.6 2025-11-19 CN121476781A 2026-02-06 Fan Qi, Zhai Kai, Liu Yanjing, Xie Yasong, Ma Yanbin, Wen Jing
8 Automatic Acceptance Method and System for Data Points in Integrated Control System Area Invention Patent Published CN202511702094.1 2025-11-19 CN121689517A 2026-03-17 Liao Quanfeng, Xu Guangyu, Hu Wei, Kang Xue, Zeng Wei, Yang Zhiguo, Wang Ruizhi
9 Line Parameter Identification Protection Method and System Based on Two-Port Network Model Invention Patent Published CN202511686377.1 2025-11-18 CN121642835A 2026-03-10 Liu Yang, Wang Yingying, Zhang Jin, Xu Kehan, Chen Xiangwen, Jin Mingliang, Zhao Yue, Li Huixin, Feng Xiaohu
10 Real-time Digital Simulation Full-Process Automatic Testing System and Method Invention Patent Published CN202511686374.8 2025-11-18 CN121681355A 2026-03-17 Zhai Kai, Fan Qi, Xie Yasong
11 Multi-Heterogeneous Subject System Optimization Method and System for Real-Time Processing Scenarios Invention Patent Published CN202511646380.0 2025-11-11 CN121635969A 2026-03-10 Yan Yan, Cai Xinwei, Hu Jiong, Jiang Xincheng, Xiao Zhengqiang, Geng Zhe, Guo Chunlin, Zhang Mengting, Shi Weisheng, Zhao Dandan, Gao Xinshuang, Li Xinkai
12 Event-Based Signal Matching Method and System Based on BERT Model Invention Patent Published CN202511633951.7 2025-11-10 CN121682291A 2026-03-17 Li Wenbin, Zheng Dainian, Huo Xiaojie, Zhang Liqiang, Guo Yingying, Li Zhixue, Wang Ruizhi, Liu Gang, Xu Yanming
13 Integrated Compilation Method and System for PSCAD Simulation and Device Operation Invention Patent Substantive Examination in Effect, Published CN202511587786.6 2025-11-03 CN121579012A 2026-02-27 Geng Zhe, Xiao Zhengqiang, Yan Yan, Cao Fengmei, Sun Gang, Zhou Lidong, Lei Rui, Ma Guanxiao, Lei Xianghua, Liu Honglei
14 Spatiotemporal Isolated High-Real-Time Control Logic Compilation Optimization Method and System Invention Patent Substantive Examination in Effect, Published CN202511587683.X 2025-11-03 CN121579011A 2026-02-27 Geng Zhe, Yan Yan, Hu Jiong, Lei Xianghua, Liu Honglei, Ma Guanxiao, Zhou Lidong
15 Power Dispatching System Real-Time Database Sharding Storage Resource Optimization Method and System Invention Patent Published CN202511554359.8 2025-10-29 CN121684369A 2026-03-17 Li Zhixue, Liu Gang, Xu Yanming, Li Kun, Yan Xianyun, Zhou Jian, Lu Dan, Yang Li
16 Multi-Channel High-Voltage Circuit Breaker Trip Control Circuit and Method Based on MOSFET Invention Patent Published CN202511536388.1 2025-10-27 CN121710888A 2026-03-20 Yang Lei, Chen Qiurong, Fang Tongzhong, Ma Hanqing, Miao Jianjian, Wang Yu
17 Power System Knowledge Base Q&A Method and System Based on Improved RAG Invention Patent Substantive Examination in Effect, Published CN202511518816.8 2025-10-23 CN121597792A 2026-03-03 Zhang Liqiang, Xu Yanming, Han Minglei, Guo Yingying, Xu Gang, Liu Gang, Lou Xiaonan, Li Zhixue, Yang Zitao, Wei Jiaolong, Yu Jimin, Li Wenbin, Zhou Shuxiong
18 Multi-Scenario Human-Machine Interface Construction Method and System for Power Business Invention Patent Published CN202511472754.1 2025-10-15 CN121680989A 2026-03-17 Xu Yanming, Li Zhixue, Xie Xiaodong, Huang Lei, Yan Fei, Zhao Fengqing
19 Abnormal Sampling Data Detection Method and System Based on AC Characteristics Invention Patent Substantive Examination in Effect, Published CN202511406449.2 2025-09-29 CN121114551A 2025-12-12 Yang Qianqian, Jin Yangjun, Wang Zhihua, Yan Junhong, Guo Fang, Zheng Tao, Xiao Bin, Ai Zhihu, Tian Yanwei, Yuan Guangbao
20 Dynamic Regulation Method and System for Converter Liquid Cooling Medium Concentration Based on Membrane Separation Invention Patent Substantive Examination in Effect, Published CN202511411125.8 2025-09-29 CN121357842A 2026-01-16 Liu Yilong, Yu Hualong, Liu Kun, Li Si, Wang Yingying, Han Xiaopeng, Sun Guikai, Su Xuelei, Shen Liangxing, Mao Yuhao, Liu Ning, Zhang Zhigang, Ren Xingwang, Wang Lihua

[Note: The list continues with similar detailed patent information for Beijing Sifang Automation Co., Ltd.]

Beijing Sifang Automation Co., Ltd. was established on November 6, 2003, and listed on the Shanghai Stock Exchange on December 31, 2010. The registered and office address is in Beijing. The company is a leading enterprise in the domestic power grid automation equipment field, focusing on relay protection and related products, with strong technical accumulation and full industry chain advantages.

In 2025, the company’s revenue was 8.193 billion RMB, ranking 1st/2nd in the industry, significantly above the industry average and median of 562.8 million RMB, far surpassing the second-ranked Keda Intelligent’s 306.3 million RMB. Its main business includes power plant and industrial automation revenue of 3.826 billion RMB (46.70%) and power grid automation revenue of 3.679 billion RMB (44.90%). Net profit was 829 million RMB, also ranking 1st/2nd, well above the industry average and median of 45.7 million RMB, and significantly ahead of Keda Intelligent’s 8.566 million RMB.

Recent patent applications by Beijing Sifang Automation Co., Ltd.:

No. Patent Name Type Legal Status Application Number Application Date Publication Number Publication Date Inventors
1 3D Visual-Based Multi-Data Regulation Control Method Invention Patent Published CN202610043260.X 2026-01-14 CN121682785A 2026-03-17 Cui Yongfeng, Shang Hengbo, Lu Aoqi, Yang Libin, Cao Zheng, Liu Qiqi, Liu Xin, Guo Dongxia, Zhong Xu, Zhang Huixian, Duan Chaochao
2 Adaptive Configuration-Based Intelligent Testing System and Method Invention Patent Published CN202512019672.8 2025-12-30 CN121679192A 2026-03-17 Xu Wanfang, He Tongyun, Wang Jialun, Peng Bo
3 Ethernet Switch Virtual LAN Testing Method, Device, and Computer Equipment for Power Industry Invention Patent Published CN202511910957.4 2025-12-17 CN121644438A 2026-03-10 Guo Xiaoyi, Xu Peng, Yang Gui, Liu Yang, Huang Runhong, Li Ming, Zhang Fuzeng, Chen Xiaoguo, Wei Chengzhi, Gao Xiang, Dong Chao
4 Power and Computing Power Coordinated Control Method and System Invention Patent Published CN202511897197.8 2025-12-16 CN121688863A 2026-03-17 Li Xiao, Guo Hailong, Zhou Yankun, Yang Yonglin, Yao Chen
5 AC Fault Cross-Through Control Method and Device for Soft-Connected Converter Invention Patent Granted CN202510934371.5 2025-07-08 CN120433309A 2025-08-05 Ma Yanbin, Zhu Hui, Sun Xiaojing, Cao Fengmei, Chang Fujie, Wen Jing, Li Wei
6 Power Converter Control Circuit and Method Based on MOSFET for High-Voltage Switchgear Invention Patent Published CN202511536388.1 2025-10-27 CN121710888A 2026-03-20 Yang Lei, Chen Qiurong, Fang Tongzhong, Ma Hanqing, Miao Jianjian, Wang Yu
7 Power Grid Frequency Response-Based Fast Frequency Regulation Control Method and System Invention Patent Granted CN202511767320.4 2025-11-28 CN121216515B 2026-02-17 Li Ping
8 Distance Protection Method and System for Interphase Faults on New Energy Transmission Lines Invention Patent Substantive Examination in Effect, Published CN202511718931.X 2025-11-21 CN121602304A 2026-03-03 Xiong Jun, Nie Juanhong, Zhao Zhihong, Cai Xinwei, Huang Jijie, Xiao Yuanqing, Wu Yekai
9 Modular, Rapidly Reconfigurable Compact DC Control and Protection Test Platform Invention Patent Substantive Examination in Effect, Published CN202511701750.6 2025-11-19 CN121476781A 2026-02-06 Fan Qi, Zhai Kai, Liu Yanjing, Xie Yasong, Ma Yanbin, Wen Jing
10 Automatic Acceptance Method and System for Data Points in Integrated Control System Area Invention Patent Published CN202511702094.1 2025-11-19 CN121689517A 2026-03-17 Liao Quanfeng, Xu Guangyu, Hu Wei, Kang Xue, Zeng Wei, Yang Zhiguo, Wang Ruizhi

[The list continues with similar detailed patent information for Beijing Sifang Automation Co., Ltd.]

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