Patents Assigned to Electric Power Research Institute
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Publication number: 20240125094Abstract: The present invention is directed to a metering valve for controlling the amount of a fluid passed through the valve and a servo-valve for controlling the metering valve, wherein the servo-valve is decoupled from the metering valve to thermally distance or thermally isolate the servo-valve from any heat from the fluid passing through the metering valve. The metering valve and servo-valve may be used to attemperate a steam stream in a power plant attemperation system, such as a system for attemperating a superheated steam gas stream from a power plant being used for a heat-recovery steam generator. An integrated metering valve and discharge valve for discharging fluid during periods of non-use is also provide. Changeable throttle plates are also provided that control the flow of the fluid through the control chamber of the metering valve and the discharge valve.Type: ApplicationFiled: December 6, 2023Publication date: April 18, 2024Applicant: Electric Power Research Institute, Inc.Inventors: Hermann Josef Laumen, Mohamed Douch, Stanley Timothy Rosinski, Bill Gene Carson
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Patent number: 11953379Abstract: A live detection system, a thermal infrared (IR) imager and a method for power grid equipment are provided. The system includes an environmental parameter module for acquiring environmental temperature, humidity and wind speed data; a ranging module for measuring a linear distance to the power grid equipment; an equipment type recognition module for acquiring an image of the power grid equipment, and recognizing a type of the power grid equipment; an equipment material determination module for determining a material type of the power grid equipment; an emissivity setting module for setting an emissivity; an temperature measurement module for obtaining a temperature of the power grid equipment by focusing on positions of the power grid equipment which need temperature measurement; and a report generation module for selecting a corresponding diagnostic model, displaying a temperature measurement position and a temperature value, drawing a conclusion, and generating a report.Type: GrantFiled: December 3, 2020Date of Patent: April 9, 2024Assignees: State Grid Shandong Electric Power Research Institute, State Grid Corporation of ChinaInventors: Rong Liu, Hui Liu, Qinghe Shen, Jinxia Yao, Haiyan Yuan, Bo Yang, Xiaobin Sun, Chao Gu, Ran Jia, Yang Zhang, Chao Zhou, Chuanbin Liu
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Patent number: 11954210Abstract: A hierarchical health index evaluation method for an intelligent substation includes: obtaining a basic health index of a device based on static information and dynamic information of the device; obtaining a device correlation based on a communication connection relationship between the device and another device, and correcting the basic health index of the device based on the device correlation to obtain a health index of the device; obtaining a layer-based health index of a layer based on a device health index and a device importance weight of the layer; obtaining a whole-station health index of an intelligent substation based on a layer-based health index of each layer and a sum of device importance weights of each layer; and regulating the intelligent substation based on a health index of each device in the intelligent substation, the layer-based health index of each layer, and the whole-station health index.Type: GrantFiled: December 29, 2021Date of Patent: April 9, 2024Assignees: State Grid Shandong Electric Power Research Institute, State Grid Corporation of ChinaInventors: Wenting Wang, Zheng Xu, Xin Liu, Yujie Geng, Qigui Nie, Lin Lin, Jing Liu, Guodong Lv, Yang Zhao, Tiancheng Ren, Xiaohong Zhao
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Publication number: 20240110997Abstract: Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method comprises: selecting a protective grounding box of a cross-bonded grounding system, respectively connecting a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selecting a stable signal with a frequency different from a power frequency or a field interference frequency, and testing effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box in a coupled manner; and obtaining resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determining if the cable cross-bonded grounding system has a connection defect.Type: ApplicationFiled: August 4, 2022Publication date: April 4, 2024Applicants: STATE GRID JIANGSU ELECTRIC POWER CO., LTD. RESEARCH INSTITUTE, STATE GRID JIANGSU ELECTRIC POWER CO., LTD., JIANGSU ELECTRIC POWER RESEARCH INSTITUTE CO., LTD.Inventors: Jingying CAO, Qiang HUANG, Jinggang YANG, Jie CHEN, Rong SUN, Jianjun LIU, Xiao TAN, Libin HU, Chenying LI, Wei ZHANG
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Publication number: 20240106235Abstract: A high anti-interference microsystem based on System In Package (SIP) for a power grid is provided. The high anti-interference microsystem comprises a ceramic cavity, a ceramic substrate, a magnetic cover plate, a digital signal processing circuit, an analog signal conditioning circuit and a shield, wherein the ceramic cavity supports the ceramic substrate, the magnetic cover plate is in sealed contact with the ceramic cavity, and the ceramic substrate is arranged in a cavity formed by the ceramic cavity and the magnetic cover plate; a sealed shell of the microsystem based on SIP is composed of the magnetic cover plate and the ceramic cavity; the digital signal processing circuit and the analog signal conditioning circuit are arranged on the ceramic substrate and respectively process received signals to be processed; the shield covers an outer side of the sealed shell and is used for shielding external magnetic field interference.Type: ApplicationFiled: August 2, 2023Publication date: March 28, 2024Applicant: Electric Power Research Institute of State Grid Zhejiang Electric Power Co., LTDInventors: Xianjun SHAO, Xiaoxin CHEN, Yiming ZHENG, Chen LI, Jianjun WANG, Ping QIAN, Hua XU, Shaoan WANG, Shaohe WANG, Haibao MU, Huibin TAO, Lin ZHAO, Wenzhe ZHENG, Dun QIAN
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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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Publication number: 20240097454Abstract: Disclosed are an emergency control method and system based on source-load-storage regulation and cutback. According to the method, output power of power generating sources is regulated according to a power regulating quantity and a frequency regulation requirement, an output power compensation and output frequency of each power generating source are maintained within permissible ranges, so that a balance between power supply and demand of a power distribution network is maintained; and standby energy-storage power stations are used to make up a power gap, and an external power supply system is used to assist in making up a power deficiency, so that large load disturbance can be handled make up the power gap.Type: ApplicationFiled: July 30, 2021Publication date: March 21, 2024Applicants: NANJING UNIVERSITY OF POASTS AND TELECOMMUNICATIONS, STATE GRID ELECTRIC POWER RESEARCH INSTITUTE CO. LTDInventors: Dong YUE, Chunxia DOU, Zhijun ZHANG, Wenbin YUE, Xiaohua DING, Jianbo LUO, Yanman LI, Kun HUANG, Tao HAN
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Publication number: 20240097434Abstract: A method for detecting abnormal direct current voltage measurement in a modular multilevel converter high voltage direct current transmission system is provided. In the method, a valve group voltage at a detection pole is obtained, voltages at voltage measurement points at the detection pole are collected, and comparison and determination are performed based on the actual arrangement of the voltage measurement points, and then whether an abnormal measurement occurs at each of the voltage measurement points is determined.Type: ApplicationFiled: May 18, 2022Publication date: March 21, 2024Applicant: ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRIDInventors: Qinlei CHEN, Shuyong LI, Qi GUO, Libin HUANG, Xuehua LIN, Zhijiang LIU, Deyang CHEN, Chao LUO, Guanming ZENG, Mengjun LIAO, Lijun DENG, Liu CUI, Zhida HUANG, Haiping GUO, Tianyu GUO
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Patent number: 11936186Abstract: Provided are a method and apparatus for evaluating a degree of frequency regulation urgency of a generator set, a power system and a storage medium.Type: GrantFiled: January 17, 2020Date of Patent: March 19, 2024Assignees: STATE GRID FUJIAN ELECTRIC POWER COMPANY LIMITED, STATE GRID FUJIAN ELECTRIC POWER RESEARCH INSTITUTE, CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITEDInventors: Zhenhua Xu, Risheng Fang, Ting Huang, Dahai Yu, Kewen Li, Xiangyu Tao, Daoshan Huang, Yi Su, Zhi Chen, Danyue Wu, Huiyu Zhang
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Publication number: 20240067036Abstract: Disclosed is a charging station capable of realizing mutual capacity aid, which comprises a plurality of charging units, a power bus and a mutual capacity aid bus. Each charging unit is powered by the power bus, and each charging unit provides mutual aid capacity for another charging unit through the mutual capacity aid bus or receives mutual aid capacity from other charging units through the mutual capacity aid bus. The charging station can realize rapid charging of electric vehicles, and can also realize mutual capacity aid.Type: ApplicationFiled: June 4, 2021Publication date: February 29, 2024Applicants: JIANGSU ELECTRIC POWER RESEARCH INSTITUTE CO., LTD., STATE GRID JIANGSU ELECTRIC POWER CO., LTD. RESEARCH INSTITUTEInventors: Tiankui SUN, Yubo YUAN, Mingming SHI, Xin FANG, Jinggang YANG, Shuyi ZHUANG, Xiaodong YUAN, Chenyu ZHANG, Lei GAO, Peng LI, Yaojia MA, Shu CHEN, Jing CHEN, Qun LI, Jian LIU
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Patent number: 11888315Abstract: The invention discloses an energy storage transient power coordinated control method for restraining subsequent commutation failures, which includes: detecting DC current, AC bus voltage and arc quenching angle on the inverter side; Controlling the energy storage power station to enter the transient control mode when the DC current is greater than the first current threshold or the AC bus voltage is less than the voltage threshold or the arc quenching angle is less than the first arc quenching angle threshold. By detecting the DC current and arc quenching angle on the inverter side, the active power output time instruction and reactive power output time instruction are determined respectively. The active power output amplitude instruction is determined by detecting the AC bus voltage, and the reactive power output amplitude instruction is determined by using the constraint of the total energy storage capacity.Type: GrantFiled: July 30, 2021Date of Patent: January 30, 2024Assignees: STATE GRID HENAN ELECTRIC POWER RESEARCH INSTITUTE, HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chenghao Li, Wei Yao, Mingyang Liu, Hongyu Zhou, Wei Cui, Jingyu Wen, Ning Zhou, Yufei Rao, Ze Gao, Han Xiao
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Patent number: 11873921Abstract: The present invention is directed to a metering valve for controlling the amount of a fluid passed through the valve and a servo-valve for controlling the metering valve, wherein the servo-valve is decoupled from the metering valve to thermally distance or thermally isolate the servo-valve from any heat from the fluid passing through the metering valve. The metering valve and servo-valve may be used to attemperate a steam stream in a power plant attemperation system, such as a system for attemperating a superheated steam gas stream from a power plant being used for a heat-recovery steam generator. An integrated metering valve and discharge valve for discharging fluid during periods of non-use is also provide. Changeable throttle plates are also provided that control the flow of the fluid through the control chamber of the metering valve and the discharge valve.Type: GrantFiled: August 9, 2022Date of Patent: January 16, 2024Assignee: Electric Power Research Institute, Inc.Inventors: Hermann Josef Laumen, Mohamed Douch, Stanley Timothy Rosinski, Bill Gene Carson
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Patent number: 11867397Abstract: A non-transitory computer readable medium with instructions stored thereon, the instructions executable by one or more processors for selecting infrequent or frequent autotuning of a combustor; and determining the health of a combustor. Also, a method of monitoring a combustor within a gas turbine engine system, comprising providing a gas turbine engine system, wherein the gas turbine engine includes an autotuning system; selecting infrequent or frequent autotuning of the combustor; and determining the health of the combustor; wherein said determining the health of a combustor comprises receiving real-time fuel gas temperature data from at least one thermocouple.Type: GrantFiled: May 10, 2019Date of Patent: January 9, 2024Assignee: ELECTRIC POWER RESEARCH INSTITUTE, INC.Inventors: Leonard Charles Angello, Benjamin Emerson, Timothy Charles Lieuwen, David Robert Noble, Jared Kee
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Patent number: 11867616Abstract: Disclosed is an optical detection system for detecting a decomposition product of a high-voltage device, including: a measurement gas chamber and a measurement host. The measurement gas chamber is disposed on the high-voltage device and is in communication with a gas chamber of the high-voltage device, a collimator and a reflector are disposed on two sides of the measurement gas chamber respectively, and the measurement host is connected to the collimator. The collimator is used for emitting measurement laser to the measurement gas chamber according to a laser signal sent by the measurement host, and receiving reflected laser from the reflector and transmitting the reflected laser to the measurement host. In the present invention, data collection and backhaul between a measurement host and a measurement gas chamber are implemented through a laser signal, thus avoiding electromagnetic interference and improving the safety of measurement for a high-voltage device.Type: GrantFiled: October 29, 2020Date of Patent: January 9, 2024Assignees: State Grid Chongqing Electric Power Co. Electric Power Research Institute, State Grid Corporation of ChinaInventors: Qiang Yao, Shiling Zhang, Yulong Miao, Yongtao Chen, Xintian Li
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Patent number: 11860619Abstract: Disclosed are a fault early-warning method and a fault early-warning system applied to a gas turbine unit, and an apparatus. The method includes: calculating, by means of a mechanism model, predicted data of prediction parameters in a gas turbine unit, and performing data comparison on the predicted data and real data of the prediction parameters, so as to obtain an error matrix; constructing several Kriging primary functions according to the mechanism model; screening an optimal Kriging primary function from the several Kriging primary functions according to the error matrix, and performing error compensation on the mechanism model by using the optimal Kriging primary function; and performing fault early warning on the gas turbine unit by means of the mechanism model after error compensation. By means of the present application, the problem of a large number of fault false alarms in fault early warning of an existing gas turbine is solved.Type: GrantFiled: May 8, 2023Date of Patent: January 2, 2024Assignee: HUADIAN ELECTRIC POWER RESEARCH INSTITUTE CO., LTD.Inventors: Kun Zhang, Hongren Li, Pingyang Zi, Wei Li, Liang Sun
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Patent number: 11862982Abstract: A networked control method for primary frequency regulation of a new energy power station based on a source-grid-load-storage networked cloud decision control system platform comprises: determining, according to historical operating data of a new energy power station, primary frequency regulation predictive values of power generation units of the new energy power station; determining, according to the primary frequency regulation predictive values, optimal control sequences of inverters of the power generation units at different times based on a pre-established inverter active power model, wherein the optimal control sequences comprise multiple control quantities of active power of the inverters; marking the optimal control sequences at the different times with time scales, sending the optimal control sequences to executing devices of the power generation units, receiving the optimal control sequences, and determining whether to store or not store the optimal control sequences; and determining the control quaType: GrantFiled: August 2, 2021Date of Patent: January 2, 2024Assignees: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS, STATE GRID ELECTRIC POWER RESEARCH INSTITUTE CO., LTDInventors: Dong Yue, Chunxia Dou, Zhijun Zhang, Xiaohua Ding, Jianbo Luo, Yanman Li, Kun Huang, Tao Han
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Patent number: 11841387Abstract: A system for load identification in collaboration with a cloud end includes: a smart Internet of Things electricity meter module, used for matching extracted feature quantity data with a first load feature library of the smart Internet of Things electricity meter module, and determining load feature data corresponding to unmatched feature quantity data in the feature quantity data as target load feature data; a use information front-end/acquisition module, used for calling the target load feature data and transmitting the target load feature data to a main station load identification module; and a main station load identification module, used for receiving the target load feature data, performing data direction processing on the target load feature data, determining an optimal matching strategy matching the feature data to be identified, and identifying an optimal matching solution corresponding to the feature quantity data to be identified in a second load feature library.Type: GrantFiled: January 29, 2022Date of Patent: December 12, 2023Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Xingqi Liu, Enguo Zhu, Heping Zou, Fantao Lin, Min Lei, Yinghui Xu, Hao Chen, Zhongxing Wu, Yupeng Zhang, Zixu Zhu, Yue Han
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Publication number: 20230393571Abstract: Disclosed are a fault early-warning method and a fault early-warning system applied to a gas turbine unit, and an apparatus. The method includes: calculating, by means of a mechanism model, predicted data of prediction parameters in a gas turbine unit, and performing data comparison on the predicted data and real data of the prediction parameters, so as to obtain an error matrix; constructing several Kriging primary functions according to the mechanism model; screening an optimal Kriging primary function from the several Kriging primary functions according to the error matrix, and performing error compensation on the mechanism model by using the optimal Kriging primary function; and performing fault early warning on the gas turbine unit by means of the mechanism model after error compensation. By means of the present application, the problem of a large number of fault false alarms in fault early warning of an existing gas turbine is solved.Type: ApplicationFiled: May 8, 2023Publication date: December 7, 2023Applicant: HUADIAN ELECTRIC POWER RESEARCH INSTITUTE CO., LTD.Inventors: Kun ZHANG, Hongren LI, Pingyang ZI, Wei LI, Liang SUN
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Publication number: 20230387687Abstract: A method for checking a medium-term and long-term maintenance plan of a power grid. A predicted load value and one or more historical load values of a power grid are acquired and clustered through a clustering algorithm, and a historical moment at which a historical load value is in a same cluster as the predicted load value and has a largest load value is selected as a target historical moment. A power grid operation mode model at the target historical moment is acquired, and the power grid operation mode model is updated according to the maintenance plan and open loop point information by using a full wiring approach to obtain a future-state power grid operation mode model. Ground state power flow data of the power grid are calculated based on the operation mode model, and safety check is carried out according to a preset ground state power flow limit.Type: ApplicationFiled: August 25, 2021Publication date: November 30, 2023Applicants: China Electric Power Research Institute, State Grid Shanxi Electric Power Research InstituteInventors: Yuxuan LI, Chuancheng ZHANG, Sai DAI, Hui CUI, Qiang DING, Lixin LI, Qiang LI, Yi PAN, Zhi CAI, Yueshuang BAO, Xinyuan LIU, Huiping ZHENG, Wei HAN, Wei WANG, Lei WANG, Jinghua YAN, Bin HAN, Xiaojing HU, Bo LI, Guodong HUANG, Dan XU, Jiali ZHANG, Weigang LI
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Publication number: 20230387691Abstract: A multi-timescale voltage regulation method based on source-grid-load-storage multi-terminal collaboration of a power distribution network is disclosed, which comprises: establishing, based on a Petri network, a multi-mode switching control model based on voltage security event trigger to realize effective control of a global voltage; establishing multi-objective optimization taking into account a source-storage-load regulation cost and a network transmission loss to realize collaborative and dynamic control of controllable resources of a source terminal, a load terminal and a storage terminal in each operating mode; and establishing a source-storage-load multi-terminal collaboration-based distributed voltage control model based on voltage security event trigger over a short timescale by taking into account the problems of voltage magnitude being out of limit and voltage leap, and solving online an optimal control sequence of the source terminal, the load terminal and the storage terminal in a receding horizoType: ApplicationFiled: January 5, 2022Publication date: November 30, 2023Applicants: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS, STATE GRID ELECTRIC POWER RESEARCH INSTITUTE CO. LTDInventors: Dong YUE, Chunxia DOU, Zhijun ZHANG, Xiaohua DING, Jianbo LUO, Yanman LI, Kun HUANG, Tao HAN