Patents Assigned to ANHUI ELECTRIC POWER RESEARCH INSTITUTE
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Patent number: 11940375Abstract: The present disclosure relates to the technical field of fiber-optic gas sensing and laser photoacoustic spectroscopy, and reliability of a gas detection system is improved by actively selecting a working frequency of low noise interference combined with an optical fiber photoacoustic sensing probe capable of isolating high-frequency noise. A gas enters a photoacoustic microcavity through gaps on a sound-sensitive diaphragm after diffusing into a miniature air chamber through a plurality of micropores. Photoacoustic excitation light is incident into the photoacoustic microcavity through a fiber-optic collimator and then excited to generate a photoacoustic pressure wave to cause the sound-sensitive diaphragm to vibrate periodically. An end face of a single-mode optical fiber and the sound-sensitive diaphragm constitutes a fiber-optic Fabry-Perot interferometer. The interferometer measures a deflection of the diaphragm and inverts a concentration of the to-be-measured gas.Type: GrantFiled: November 26, 2021Date of Patent: March 26, 2024Assignees: STATE GRID ANHUI ELECTRIC POWER RESEARCH INSTITUTE, Dalian University of TechnologyInventors: Fengxiang Ma, Ke Chen, Yue Zhao, Feng Zhu, Min Guo, Yu Tian, Xiaofang Yuan, Yabin Ma, Chen Hang
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Patent number: 11731280Abstract: A cable trench inspection robot. The cable trench inspection robot includes a base spreading system, and a camera lifting system disposed on the base spreading system, where the base spreading system includes a base plate, a linear action unit, a cantilever plate, a walking assembly, and a jacking assembly, and the camera lifting system includes a travel block, an imitated four-bar assembly, a support rod, and a camera assembly. Such inspection can realize a through-wall operation by using a cable trench, thereby avoiding many use problems caused by a firewall, and efficiently completing a predetermined inspection task.Type: GrantFiled: August 20, 2021Date of Patent: August 22, 2023Assignees: STATE GRID ANHUI ELECTRIC POWER RESEARCH INSTITUTE, State Grid Corporation of ChinaInventors: Tao Sun, Minghao Fan, Jiaqing Zhang, Jia Xie, Bo Yan, Daoyou Huang, Songyuan Cao, Liangpeng Ye
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Publication number: 20230153737Abstract: A method for evaluating the effectiveness of a transformer fire extinguishing system based on a natural language fuzzy analysis is provided, and a method and device for evaluating the fire extinguishing system are established. An expert fuzzy evaluation matrix is established by natural language fuzzifying and de-fuzzifying methods for the effectiveness of the fire extinguishing system. According to the relative influence of each index in the evaluation index system of the effectiveness of the fire extinguishing system, the weight comparison of each index is determined, and the index subjective weight is established based on the weight comparison of each index. A de-fuzzified matrix is obtained by de-fuzzifying an expert fuzzy evaluation matrix, and based on the de-fuzzified matrix, an objective weight is obtained by an entropy weight method. A comprehensive weight is obtained by combining the subjective and objective weights.Type: ApplicationFiled: January 12, 2023Publication date: May 18, 2023Applicants: STATE GRID ANHUI ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Jiaqing ZHANG, Fengju SHANG, Xiaodong ZHANG, Xinjie QIU, Dengfeng CHENG, Yifu ZHOU, Yi GUO, Yubiao HUANG, Wen SU, Rui LIU
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Publication number: 20220245298Abstract: The disclosure discloses a dynamic stability analysis method and device for a linear time-periodic (LTP) system. The method includes the following steps. Calculate the Q matrix corresponding to the LTP system, and use the eigenvalue of Q matrix whose real part is positive as an instability eigenvalue. Each instability eigenvalue is subjected to the following steps. (S1) the state space model is transformed into the infinite-order harmonic state space (HSS) model, and the truncation order m of HSS model is initialized to 1. (S2) after m-th order truncation of the HSS model, its eigenvalue thereof is calculated. If the real part of the eigenvalue of HSS model is not the same as the real part of the instability eigenvalue, m is updated, and step (S2) is performed again; otherwise, modal participation factor analysis is performed to obtain the state variables that dominate the system instability.Type: ApplicationFiled: October 25, 2021Publication date: August 4, 2022Applicants: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, China Electric Power Research Institute, State Grid Anhui Electric Power Research InstituteInventors: Jiabing Hu, Jianhang Zhu, Shicong Ma, Yingbiao Li, Tiezhu Wang, Jianbo Guo, Zhen Wang
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Power frequency parameter simulation system for a power transmission line and control method thereof
Patent number: 9460636Abstract: A power frequency parameter simulation system for a power transmission line and a control method thereof, the system includes a simulation main circuit (1), an interference power supply (2) and a procedure controller (3). In the system, a power frequency parameter of a 10 to 100 kilometers of 500 kV power transmission line is simulated in a lumped parameter manner; and the control method includes the following steps of: a step to detect the automatically zeroing during starting up, a step to control the reduction of the length of a simulation line and a step to control a simulation interference voltage. A long-distance power transmission line is realized to be moved into a room and be tested by means of the power frequency parameter test system, so the various inconveniences of on-site measurement are avoided.Type: GrantFiled: September 22, 2011Date of Patent: October 4, 2016Assignees: ANHUI ELECTRIC POWER RESEARCH INSTITUTE, SUZHOU HD ELECTRIC CO., LTD., STATE GRID CORPORATION OF CHINA (SGCC)Inventors: Zhong Fu, Jiantao Ye, Daowen Yang, Zinian Chen, Wei Li, Dengfeng Cheng, Yongkang Huang, Jingjing Dong, Wenhui Tong, Cuicui Wang -
POWER FREQUENCY PARAMETER SIMULATION SYSTEM FOR A POWER TRANSMISSION LINE AND CONTROL METHOD THEREOF
Publication number: 20140072950Abstract: A power frequency parameter simulation system for a power transmission line and a control method thereof, the system comprises a simulation main circuit (1), an interference power supply (2) and a procedure controller (3). In the system, a power frequency parameter of a 10 to 100 kilometers of 500 kV power transmission line is simulated in a parameter integration manner; and the control method comprises the following steps of: a step to detect the automatically zeroing during starting up, a step to control the reduction of the length of a simulation line and a step to control a simulation interference voltage. A long-distance power transmission line is realized to be moved into a room and be tested by means of the power frequency parameter test system, so the various inconveniences of on-site measurement are avoided.Type: ApplicationFiled: September 22, 2011Publication date: March 13, 2014Applicants: ANHUI ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA, SUZHOU HD ELECTRIC CO., LTD.Inventors: Zhong Fu, Jiantao Ye, Daowen Yang, Zinian Chen, Wei Li, Dengfeng Cheng, Yongkang Huang, Jingjing Dong, Wenhui Tong, Cuicui Wang