Patents Assigned to Electric Power Research Institute
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Publication number: 20220355682Abstract: An electrical connector apparatus that magnetically aligns electrical contacts in a suspended magnetic connector with mating electrical contacts in a vehicle magnetic connector and holds the connectors together during an electric vehicle charging process.Type: ApplicationFiled: November 16, 2021Publication date: November 10, 2022Applicant: Electric Power Research Institute, Inc.Inventors: Thomas D. Geist, Doni J. Nastasi
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Publication number: 20220334005Abstract: A deep well grounding electrode and a deep well grounding electrode monitoring system. The deep well grounding electrode comprises a feeding rod, a feeding head, a steel casing, a temperature measurement optical cable, an exhaust pipe, and a drainage cable; the steel casing is located in the well body; the feeding head is located at the bottom of the steel casing; the feeding rod, the temperature measurement optical cable, the exhaust pipe, and the drainage cable are located in the steel casing; the temperature measurement optical cable extends from a bottom end of the feeding rod to a monitoring module; the exhaust pipe extends from the bottom end of the feeding rod to the ground; and one end of the drainage cable is welded on the feeding rod, the other end extends to the monitoring module, and the drainage cable is fixed to the feeding rod by bolts.Type: ApplicationFiled: July 24, 2020Publication date: October 20, 2022Applicants: ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, CHINA SOUTHERN POWER GRIDInventors: Gang LIU, Lu QU, Yi ZHANG, Shangmao HU, Taishan HU, Minchuan LIAO, Lei JIA, Licheng LI, Hong RAO, Hansheng CAI, Ruifa FENG, Hao LIU, Qi MEI, Jian SHI, Ruihan QI
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Patent number: 11467223Abstract: A device for simulating intermittent arc grounding faults in a power distribution network includes a sliding rail, a first and a second support frames, an insulated electrode disk, and an electrode disk motor. The first support frame is fixed on the left side of the slide rail, and the position of the second support frame relative to the first support frame can be adjusted through the sliding rail. The second support frame is provided with an electrode disk motor for driving the insulated electrode disk to rotate. An upper and a lower conductive bars are installed on the first support frame, their adjacent ends provided with an upper and a lower arc-shaped conductor sheets, and the insulated electrode disk having two circles of conductive pillars is located between the conductor sheets. The conductor sheets are respectively installed on the side of the conductive bars close to the conductive pillar.Type: GrantFiled: October 29, 2020Date of Patent: October 11, 2022Assignee: State Grid Hubei Electric Power Research InstituteInventors: Fan Yang, Yu Shen, Wanting Deng, Zhichun Yang, Yang Lei, Yao Yao, Lei Su, Wei Hu, Wei Jiang, Zeyang Tang, Fangbin Yan
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Patent number: 11460603Abstract: The present application relates to method for computing the factor of safety of a slope including the following steps. Step 1: input parameters of a slope. Step 2: formulae a formula of stability number N into a target function and determine constrained conditions of geometric parameters ? and ?. Step 3: obtain a minimum stability number N. Step 4: determine a position of a critical slip surface. Step 5: transform the critical slip surface defined by ?, ? and n into a critical slip surface defined by R, xc and yc, and compute overturning moments of slid masses above and below external water level of the critical slip surface. Step 6: resolve an equivalent unit weight. Step 7: resolve the factor of safety FS.Type: GrantFiled: May 31, 2021Date of Patent: October 4, 2022Assignees: Chengdu University of Technology, Shanghai Dianji University, State Grid Sichuan Electric Power Research InstituteInventors: Wei Wang, Denwood Vaughan Griffiths, WangZhifu Yang, Xianghang Bu
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Publication number: 20220285931Abstract: Disclosed are a direct-current transmission line protection method and system based on pure current characteristics.Type: ApplicationFiled: June 18, 2020Publication date: September 8, 2022Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Zexin ZHOU, Huanzhang LIU, Pengfei LV, Hong CAO, Xingguo WANG, Siye RUAN, Dingxiang DU, Yong LI, Guosheng YANG, Mingliang JIN
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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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Patent number: 11402438Abstract: Disclosed is an intelligent on-line diagnosis method for winding deformation of power transformer. When a transformer is subjected to short-circuit shock or transportation collision, transformer windings may undergo local twisting, swelling or the like under the action of an electric power or mechanical force, which is called winding deformation and will cause a huge hidden danger to the safe operation of the power network. Commonly used diagnosis methods for winding deformation are all off-line diagnosis methods, which have the disadvantages that transformers need to be shut down and highly skilled operators are required. The present invention provide an intelligent on-line diagnosis method for winding deformation on the basis of combination of information entropy and support vector machine.Type: GrantFiled: August 28, 2019Date of Patent: August 2, 2022Assignees: State Grid Zhejiang Electric Power Company Limited Electric Power Research Institute, Hangzhou Kelin Electric Co., LtdInventors: Yiming Zheng, Wenhao Wang, Jialong Xu, Zhongsheng Hua, Wei Du, Yiyong Zhu, Yifan He, Bingxiao Mei, Zemin Wei, Qiaoqun Xia, Tieying Tang, Daolin Lan, Xixing Hu
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Publication number: 20220239093Abstract: A method and device for timing in time-varying distance protection based on multiple lines of a tower. The method includes: collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters; calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result; calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time of a section-II distance protection action and final time of a section-III distance protection action; and determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time of the section-II distance protection action.Type: ApplicationFiled: October 31, 2019Publication date: July 28, 2022Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Zexin ZHOU, Tianhua LI, Hong CAO, Yarong GUO, Xingguo WANG, Dingxiang DU, Delin WANG, Pengfei LV, Zhi ZHANG
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Patent number: 11397208Abstract: An infrared zero value diagnosis method and system for a porcelain insulator string are provided.Type: GrantFiled: December 31, 2020Date of Patent: July 26, 2022Assignees: State Grid Hubei Electric Power Research Institute, Hunan UniversityInventors: Xueming Zhou, Danhui Hu, Xiaopo Mao, Jungang Yin, Jianjin Fu, Zhiqiang Feng, Yaodong Zhang, Zeqi Huang, Tianru Shi
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Patent number: 11385273Abstract: Provided are a voltage measurement method and apparatus. The method includes following steps: a number j of height values are selected in a vertical direction of a transmission line, a number m of sensors used for measuring, according to a Stark effect, electric field strength of a corresponding spatial position are arranged in sequence at each of j spatial positions of the j heights from the ground, electric field strength values of the corresponding spatial position are measured through the m sensors respectively, and an electric field strength average value of the corresponding spatial position is calculated according to the acquired m electric field strength values, where j and m are positive integers, and the j spatial positions are below the transmission line; a voltage of the transmission line is calculated according to j electric field strength average values.Type: GrantFiled: November 5, 2019Date of Patent: July 12, 2022Assignees: STATE GRID CHONGQING ELECTRIC POWER CO. ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Wenxin Peng, Xingzhe Hou, Ke Zheng, Xiaorui Hu, Songnong Li, Wenli Chen, Jun Ye, Full Yang, Xingzhi Liu
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Patent number: 11374404Abstract: Disclosed is a low-voltage DC power distribution fast switching device. The device includes a positive output terminal electrically connected to a positive pole of a load, and no less than two switching circuits connected in parallel with each other; the switching circuit includes a positive input terminal electrically connected to a positive pole of common negative power supplies, a supplementary diode cluster composed of no less than one diode connected in series, and a thyristor connected between the positive input terminal and the positive output terminal; the positive input terminal is electrically connected to an anode of the supplementary diode cluster and an anode of the thyristor, and the positive output terminal is electrically connected to a cathode of the complementary diode cluster and a cathode of the thyristor.Type: GrantFiled: August 26, 2020Date of Patent: June 28, 2022Assignees: State Grid Jiangsu Electric Power Co., Ltd. Research Institute, State Grid Corporation of China, State Grid Jiangsu Electric Power Co., Ltd., Jiangsu Electric Power Research Institute Co., Ltd.Inventors: Yubo Yuan, Tiankui Sun, Jinggang Yang, Xiaodong Yuan, Lei Gao, Mingming Shi, Peng Li, Wei Su, Kun Yang, Xinyao Si, Jianhua Qin, Xin Fang, Xiaolong Xiao, Ruihuang Liu, Chenqing Wang, Jiahao Guo, Yunlong Jiang, Shuyi Zhuang, Qun Li, Jian Liu, Shu Chen
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Patent number: 11327114Abstract: The fully-automatic closed-loop detection method includes: comparing a SCD file of a to-be-tested substation with a device-type data template file, so as to determine whether configuration information about the to-be-tested substation is correct; when the configuration information about the to-be-tested substation is correct, parsing the SCD file of the to-be-tested substation and generating a SSD topological diagram of the to-be-tested substation; and acquiring a testing item from a predetermined testing item library in accordance with the SSD topological diagram of the to-be-tested substation, generating a testing scheme for the to-be-tested substation, performing a testing operation and outputting a testing result.Type: GrantFiled: January 22, 2019Date of Patent: May 10, 2022Assignees: STATE GRID HEBEI ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA, WUHAN KEMOV ELECTRIC CO., LTD, STATE GRID HEBEI ENERGY TECHNOLOGY SERVICE CO., LT DInventors: Peng Luo, Hui Fan, Jingchao Yang, Xiaoguang Hao, Yuhao Zhao, Lei He, Qun Rao
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Patent number: 11326579Abstract: An adaptive dynamic planning control method and system for a large-scale energy storage station. The method comprises: setting a structure and control target parameters of an adaptive dynamic planning control system; initializing the parameters and importing an initial state of a controlled object; calculating an original wind electricity power fluctuation rate at a current moment t and smoothing the original wind electricity power according to a change rate control strategy; calculating a smoothed wind storage power fluctuation rate, a power of an energy storage system, and a state of charge (SOC) of the energy storage system; initializing and training an evaluation module and an execution module; calculating and saving a control strategy, a smoothed wind storage power fluctuation rate, an energy storage power and a (SOC) at each moment; and outputting the control strategy at each moment, the smoothed wind storage power fluctuation rate, the energy storage power and the (SOC).Type: GrantFiled: April 28, 2017Date of Patent: May 10, 2022Assignees: China Electric Power Research Institute Company Limited, State Grid Corporation of ChinaInventors: Xiangjun Li, Yuting He, Jingqiong Zhang, Dong Hui, Xuecui Jia
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Patent number: 11298774Abstract: A method of eliminating dissimilar metal welds has been disclosed. The method includes the steps of providing a first part having a first alloy composition; providing a second part having a second alloy composition different from the first part; connecting a containment structure to the first part; pouring a powder into the containment structure such that the powder is in contact with the first part; positioning a portion of the second part in the containment structure such that the second part compresses the powder between the first and second parts; and performing hot isostatic pressing (HIP) to consolidate the powder and join the first and second parts together.Type: GrantFiled: March 30, 2017Date of Patent: April 12, 2022Assignee: Electric Power Research Institute, Inc.Inventors: Benjamin Sutton, David Wayne Gandy
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Patent number: 11293942Abstract: Provided is a superconducting tape testing device, including lead contacts and a support plate. Each lead contact a conductive contact and a magnet; the magnet is provided with a through hole through which the conductive contact passes, the support plate comprises a plate and a magnetic conductive member; and the magnetic conductive member is fixed on the surface of the plate body.Type: GrantFiled: August 30, 2019Date of Patent: April 5, 2022Assignees: Guangdong Power Grid Co., Ltd., Electric Power Research Institute of Guangdong Power Grid Co., Ltd.Inventors: Lianhong Zhong, Xinhui Duan, Meng Song, Chao Sheng, Yongfa Zhao, Bing Zhao, Li Li, Yunsong Luo, Yajun Xia, Wenfeng Cheng, Zhengjun Shi, Youxin Lin
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Patent number: 11289944Abstract: A distribution network risk identification system and method and a computer storage medium include: multi-source information data for risk identification is acquired; the multi-source information data is analyzed and processed to obtain a risk characteristic; a risk identification index is calculated on the basis of the risk characteristic, and a state of a power grid is determined according to the risk identification index; a temporal and spatial variation rule and variation trend of the risk characteristic are analyzed; a location and cause of occurrence of a risk are determined according to the temporal and spatial variation rule and variation trend of the risk characteristic; a severity of the risk is analyzed by adopting an analogue simulation manner; and the severity of the risk is assessed, and risk early warning information is issued on the basis of an assessment result.Type: GrantFiled: November 3, 2017Date of Patent: March 29, 2022Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINAInventors: Wanxing Sheng, Xiaohui Song, Yu Zhang, Jianfang Li, Fei Gao, Yajie Li, Shanshan Zhao
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Publication number: 20220052393Abstract: Lithium ion batteries and battery modules are disclosed. The lithium ion battery includes a housing where a positive electrode, a negative electrode, and an electrolyte are provided. Some of the areas of the housing are made from the fusible material. When the temperature in the housing exceeds a set threshold, the area, made from the fusible material, on the housing is communicated, where the electrolyte flows out to separate from the positive electrode and the negative electrode. Timely separation of the electrolyte in the single lithium ion battery is achieved when the temperature thereof rises abnormally, the electrolyte is effectively protected from being ignited or decomposed, the single lithium ion battery is protected from being ignited and exploded, and damages to the rest surrounding single lithium ion batteries caused by a chain reaction brought by the single lithium ion battery of which the temperature rises abnormally are avoided.Type: ApplicationFiled: May 29, 2019Publication date: February 17, 2022Applicants: State Grid Jiangsu Electric Power Research Institute, Jiangsu Electric Power Research Institute Co., Ltd.Inventors: Hongbin ZHU, Xiaoqin ZHANG, Xiang YU
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Patent number: 11250975Abstract: Provided is a superconducting fault current limiter having a composite insulating structure. The superconducting fault current limiter includes: a superconducting current limiting unit, an inner composite insulating cylinder, an outer composite insulating cylinder and a low-temperature container. The outer composite insulating cylinder is sleeved inside the low-temperature container; the inner composite insulating cylinder is sleeved inside the outer composite insulating cylinder; the superconducting current limiting unit is sleeved inside the inner composite insulating cylinder. The superconducting current limiting unit and the inner composite insulating cylinder are securely connected through a first support, and the low-temperature container and the outer composite insulating cylinder are securely connected through a second support.Type: GrantFiled: August 27, 2019Date of Patent: February 15, 2022Assignees: GUANGDONG POWER GRID CO., LTD., ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID CO., LTD.Inventors: Meng Song, Lianhong Zhong, Bing Zhao, Li Li, Yunsong Luo, Yajun Xia, Wenfeng Cheng, Zhengjun Shi, Shaotao Dai, Bangzhu Wang, Lei Hu, Tao Ma, Teng Zhang
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Patent number: 11225808Abstract: An emergency restoration system is disclosed. The emergency restoration system including a base and a tower pivotally connected to the base. The tower including at least one tower section and at least one insulated tower section pivotally connected to the at least one tower section, the insulated tower section including at least one insulator pivotally connected thereto.Type: GrantFiled: May 11, 2020Date of Patent: January 18, 2022Assignee: Electric Power Research Institute, Inc.Inventor: Jean-Pierre Henri Marais
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Patent number: 11204303Abstract: A non-transitory computer readable medium with instructions stored thereon, the instructions executable by one or more processors for calculating base swirl in a gas turbine; and calculating relative swirl in the gas turbine. Also, a method for gas turbine maintenance, comprising identifying a combustor in need of repair or replacement within a gas turbine; and repairing or replacing the combustor; wherein said identifying comprises calculating base swirl of the gas turbine and calculating relative swirl of the gas turbine in order to associate a gas path from a thermocouple to the combustor in need of repair or replacement.Type: GrantFiled: June 25, 2019Date of Patent: December 21, 2021Assignee: Electric Power Research Institute, Inc.Inventors: Leonard Charles Angello, Benjamin Emerson, Timothy Charles Lieuwen, David Robert Noble