Patents Assigned to State Grid Corporation of China
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Publication number: 20190384879Abstract: Provided are a method and apparatus for estimating a meteorology sensitive load power. The method includes: obtaining a meteorology sensitive load power estimation model; inputting a daily load curve of a date to be estimated to the meteorology sensitive load power estimation model and extracting a daily load curve dimension reduction feature of the date to be estimated; and outputting a meteorology sensitive load power based on the daily load curve dimension reduction feature of the date to be estimated and mapping relationships from daily load curve dimension reduction features onto meteorology sensitive load powers. The proposed estimation model can directly obtain the meteorology sensitive load power curve from the daily load curve, and is especially applicable to cases where meteorology data is frequently lost in practical applications.Type: ApplicationFiled: June 13, 2019Publication date: December 19, 2019Applicants: STATE GRID JIANGSU ELECTRIC POWER CO., LTD., STATE GRID CORPORATION OF CHINA, STATE GRID JIANGSU ELECTRIC POWER COMPANY RESEARCH INSTITUTE, HOHAI UNIVERSITYInventors: Jijun Yin, Qing Chen, Zheng Wu, Xiao Lu, Jianyu Luo, Lin Liu, Jingbo Zhao, Ping Ju, Yanxiang Chen, Chuan Qin, Jiajun Shi, Shiwu Liao, Xinyao Zhu, Dajiang Wang
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Patent number: 10459158Abstract: The refractive index of a fiber core of a few mode optical fiber is n1. A cladding layer surrounding the fiber core includes: a downward-concave cladding layer surrounding the fiber core, the refractive index thereof is n2; a first upward-convex cladding layer surrounding the downward-concave cladding layer, the refractive index thereof is n3; a second upward-convex cladding layer surrounding the first upward-convex cladding layer, the refractive index thereof is n4; an outer layer surrounding the second upward-convex cladding layer, the refractive index thereof is n5. The refractive indexes of the fiber core, the downward-concave cladding layer, the first upward-convex cladding layer, the second upward-convex cladding layer, the outer layer satisfy: n1>n3>n4>n5>n2. The fiber is a non-single mode in a direct waveguide state, and equivalent single-mode transmission can be achieved when the optical fiber is bent at a specific bending radius.Type: GrantFiled: January 19, 2017Date of Patent: October 29, 2019Assignees: STATE GRID JIANGXI ELECTRIC POWER COMPANY INFORMATION & TELECOMMUNICATION BRANCH, STATE GRID CORPORATION OF CHINA, JIANGSU UNIVERSITYInventors: Hua Wang, Mingyang Chen, Ping Yin, Luming Li, Jin Wei, Jihai Yang, Zhimin Cai, Yuanfeng Zhu, Hui Tian
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Patent number: 10451797Abstract: Provided is a few-mode optical fiber. The optical fiber includes: a core and a cladding enclosing the core. The cladding includes: a first inner cladding surrounding the core; a first high-refractive-index mode filter layer surrounding the first inner cladding; a second inner cladding surrounding the first high-refractive-index mode filter layer; a second high-refractive-index mode filter layer surrounding the second inner cladding; and an outer cladding surrounding the second high-refractive-index mode filter layer.Type: GrantFiled: December 18, 2017Date of Patent: October 22, 2019Assignees: STATE GRID JIANGXI ELECTRIC POWER COMPANY INFORMATION & TELECOMMUNICATION BRANCH, STATE GRID CORPORATION OF CHINA, JANGSU UNIVERSITYInventors: Hua Wang, Mingyang Chen, Xiaosheng Wu, Renhua Li, Zhimin Cai, Guodong Cao, Shenyi Li, Luming Li, Jihai Yang, Pingping Fu, Meilan Zheng, Hui Xiao, Hongliang Chu, Jun Li, Fang Yin
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Publication number: 20190305589Abstract: 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: ApplicationFiled: November 3, 2017Publication date: October 3, 2019Applicants: 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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Patent number: 10406675Abstract: The invention relates to the electric power field, in particular to a live working robot used for running and operating along wires of high-voltage transmission lines, which can realize obstacle surmounting of the live working robots along the wires safely and conveniently, comprising: a main body; a walking mechanism, wherein the walking mechanism comprises three walking arms installed on the main body and spaced apart from one another, a rolling wheel is arranged at an end of each walking arm and is in an online state when being located on an upper surface of a wire or in an offline state when being separated from the wire; the rolling wheels of at least two walking arms are in the online state; at least one part of the walking arm can extend and retract in the vertical direction to change the vertical position of the rolling wheel relative to the wire, and at least one walking arm has a rotatable portion which can rotate to change the position of the rolling wheel relative to the wire; a mounting mechanismType: GrantFiled: March 31, 2017Date of Patent: September 10, 2019Assignees: STATE GRID HUNAN ELECTRIC POWER COMPANY LIVE WORKING CENTER, STATE GRID HUNAN ELECTRIC POWER COMPANY, STATE GRID CORPORATION OF CHINA, HUNAN PEACE PROSPERITY ELECTRIC LIMITEDInventors: Xiaqing Liu, Dehua Zou, Yu Yan, Jie Niu, Jianjun Zhang, Cunyun Pan, Hao Guo, Yang Long, Naicheng Ou, Zhiwen Wang
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Patent number: 10352981Abstract: The present invention provides a power-cable ground current self-adaptive monitoring method. The steps including configuring a sample baseline, determining an impact factor set of the sample data, sampling real-time data of ground current by a power-cable ground current monitoring system, perform digital filtering on the sampled real-time data of ground current, applying a self-adaptive method to process the filtered sample data, and uploading the processed sample data to a backend monitoring device for real-time monitoring. The present invention may solve high energy loss and low information amount problems. The power consumption of monitoring device may be reduced by more than 50%, and server resource occupancy percentage may be lowered by about 20%. Efficiencies of evaluating external insulation status of the are enhanced.Type: GrantFiled: November 27, 2014Date of Patent: July 16, 2019Assignees: CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER COMPANY, JIANGSU ELECTRIC POWER COMPANY, STATE GRID CORPORATION OF CHINAInventors: Tao Yu, Hui Zhu, Jian Du, Zheng Lu, Hao Wang
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Publication number: 20190191805Abstract: A wearable equipment is adapted for substation maintenance mobile inspection and includes a binding strap and a controlling wireless communication module. A thermal imager is disposed on one side of the binding strap. A prism display component and a voice interaction module are disposed on the other side of the binding strap. The thermal imager, the prism display component, and a microphone and a speaker of the voice interaction module are connected to the controlling wireless communication module through cables, to transmit information in a power system intranet. An application method includes mounting the wearable equipment to an electric power helmet, and automatically sending an infrared image, a visible light image, power monitoring information, voice, and a video in a power operation area to a background management controlling system for the substation maintenance mobile inspection.Type: ApplicationFiled: December 21, 2018Publication date: June 27, 2019Applicants: STATE GRID HUNAN ELECTRIC POWER COMPANY LIMITED, STATE GRID HUNAN ELECTRIC POWER COMPANY LIMITED MAINTENANCE COMPANY, STATE GRID CORPORATION OF CHINAInventors: Jiusong JIANG, Fuqiang XIONG, Xigui LI, Wenqi MAO, Gang LI, Ting ZHOU, Peng SUN, Wen KANG, Chaofeng ZHANG, Zhiping MAO, Zuosheng LI, Kai DONG, Jianli WU, Hong ZHANG, Ling LUO, Guoqi ZHANG
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Publication number: 20190170822Abstract: 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: ApplicationFiled: January 22, 2019Publication date: June 6, 2019Applicants: 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: 10308140Abstract: A renewable energy-based hybrid bi-directionally interactive DC traction power supply system includes two traction substations. Each substation includes transformers, rectifiers, bidirectional AC-DC converters, a DC bus, a catenary, a steel rail and a section post. A DC bus between two adjacent traction substations is provided with a DC renewable energy system constructed by an electric vehicle charging-discharging system, a distributed generation and more than one low voltage DC microgrid. The DC renewable energy system is connected to the DC bus between two adjacent traction substations through a high voltage DC bus, thus a DC circular microgrid being formed in a power supply section post. The electric vehicle charging-discharging system is formed by more than one bidirectional DC-DC charging-discharging equipments which are intended for in connection with the power batteries of the electric vehicle.Type: GrantFiled: July 26, 2014Date of Patent: June 4, 2019Assignees: State Grid Corporation of China, North China Electric Power University, State Grid Liaoning Electric Power Company Limited Economic Research InstituteInventors: Ming Meng, Jian Liu, Xiping Wang, Dalong Hu, Li Jiang, Yingwei Song, Yan Liu, Liaoyi Ning
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Patent number: 10290066Abstract: A method and device for modeling a long-time-scale photovoltaic output time sequence are provided. The method includes that: historical data of a photovoltaic power station is acquired, and a photovoltaic output with a time length of one year and a time resolution of 15 mins is selected (101); weather types of days corresponding to the photovoltaic output are acquired from a weather station (102), and probabilities of transfer between each type of weather are calculated respectively (103); and a simulated time sequence of the photovoltaic output within a preset time scale is generated (104), and its validity is verified (105). By the method, annual and monthly photovoltaic output simulated time sequences consistent with a random fluctuation rule of a photovoltaic time sequence may be acquired according to different requirements to provide a favorable condition and a data support for analog simulation of time sequence production including massive new energy.Type: GrantFiled: April 25, 2018Date of Patent: May 14, 2019Assignees: China Electric Power Research Institute Company Li, State Grid Corporation of China, CLP Puri Zhangbei Wind Power Research & Testing CoInventors: Weisheng Wang, Chun Liu, Chi Li, Yuehui Huang, Yuefeng Wang, Cun Dong, Nan Zhang, Xiaofei Li, Yunfeng Gao, Xiaoyan Xu, Yanping Xu, Xiaofeng Pan
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Patent number: 10288495Abstract: The disclosure provides a mixed-mode temperature measurement communication phase conductor and a temperature measurement communication system. The mixed-mode temperature measurement communication phase conductor includes: a stainless sleeving optical unit and a support line hinged with the stainless sleeving optical unit, wherein an aluminum wire is hinged outside the stainless sleeving optical unit and the support line; the stainless sleeving optical unit includes: multiple single-mode fibers and at least one multi-mode fiber, wherein fibers in the stainless sleeving optical unit are mutually hinged. The disclosure realizes whole-distance temperature measurement of conductor by setting the single-mode fiber to perform communication and the multi-mode fiber to perform temperature measurement.Type: GrantFiled: July 16, 2013Date of Patent: May 14, 2019Assignees: STATE GRID CORPORATION OF CHINA, STATE GRID BEIJING ELECTRIC POWER COMPANY, BEIJING ELECTRIC POWER ECONOMIC RESEARCH INSTITUTEInventors: Bin Shu, Ying Zhang, Kai Zhang, Weiyong Wang, Wei Li, Hongli Yu, Yifan Lin, Zhanwei Zhu, Zhihui Wang
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Patent number: 10272653Abstract: The present invention discloses a fiber surface treatment composition, characterized in that the composition is comprised of a silane coupling agent, a polymer and a water repellent agent, wherein the polymer is a copolymer of a polyurethane/acrylic acid polymer, wherein the acrylic polymer is selected from the group consisting of polyacrylic acid, polyacrylates or acrylic acid-acrylic acid ester copolymers. The invention also discloses an insulating fiber having the composition on its surface, the preparation method for it, and an insulating yarn and an insulated cord. The insulated fibers, yarns and ropes of the invention have the advantages of moisture resistance, washing resistance, ultraviolet aging resistance and the like. Particularly, the insulated ropes can be applied to the charging work of transmission lines, especially the UHV transmission lines.Type: GrantFiled: March 31, 2017Date of Patent: April 30, 2019Assignees: STATE GRID HUNAN ELECTRIC POWER COMPANY LIVE WORKING CENTER, STATE GRID CORPORATION OF CHINA, STATE GRID HUNAN ELECTRIC POWER COMPANY, HUNAN PEACE PROSPERITY ELECTRIC LIMITED, XINGHUA JIAHUI ELECTRICAL EQUIPMENT LIMITED, CHANGZHOU TEXTILE GARMENT INSTITUTEInventors: Dehua Zou, Lanlan Liu, Xiaqing Liu
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Patent number: 10248674Abstract: Embodiments of the present invention provide a method and an apparatus for data quality management and control. The method includes: receiving application information transmitted by a service sub-system; resolving datasheet operation trigger information to obtain datasheet flow information; receiving user information transmitted by the service sub-system and a target datasheet transmitted by the service sub-system; if a name of the target datasheet is different from a plurality of datasheet names corresponding to the service sub-system identifier, then instructing the service sub-system to store the target datasheet into a data center; if the datasheet operation information is updating a datasheet, instructing the data center to replace datasheet contents corresponding to the datasheet name with contents of the target datasheet.Type: GrantFiled: August 5, 2016Date of Patent: April 2, 2019Assignees: JIANGXI ELECTRIC POWER CORPORATION INFORMATION AND COMMUNICATIONS BRANCH OF STATE GRID, STATE GRID CORPORATION OF CHINAInventors: Pingping Fu, Yong Ma, Hanyong Hao, Yanqing Chen, Xuelian Chen
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Publication number: 20190072070Abstract: The present disclosure discloses a control system for enhancing a frequency support capability of a wind turbine generator system. The control system includes a wind turbine, a gearbox, an electric generator and a converter. The control system is characterized by further including a supercapacitor energy storage apparatus, which includes a DC-DC converter and a supercapacitor. The converter includes DC buses, and the supercapacitor is electrically connected to the DC buses via the DC-DC converter. The supercapacitor may be orderly charged or discharged according to an operating state of the wind turbine generator system to maintain its operating condition, and has a superior reliability.Type: ApplicationFiled: February 8, 2017Publication date: March 7, 2019Applicants: WIND POWER TECHNOLOGY CENTER OF GANSU ELECTRIC POWER COMPANY, STATE GRID CORPORATION OF CHINA, GANSU ELECTRIC POWER COMPANY OF STATE GRID, SHANGHAI JIAO TONG UNIVERSITYInventors: Ningbo Wang, Liang Lu, Kun Ding, Shiyuan Zhou, Chen Zhang, Jin Li, Zheng Li, Nianzong Bai, Jing Zhi, Xu Cai, Zifen Han, Youming Cai
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Patent number: 10203293Abstract: The present invention discloses a method for lightning stroke identification and location on optical fiber composite overhead ground wire. In the method, according to the property that the lightning stroke will cause a sudden temperature rise at the lightning stroke position on the optical fiber composite overhead ground wire, optical fiber resources in the optical fiber composite overhead ground wire and the high-sensitivity detection and high-precision event locating capability of a distributed optical fiber temperature sensor can be fully utilized.Type: GrantFiled: March 12, 2015Date of Patent: February 12, 2019Assignees: STATE GRID CORPORATION OF CHINA CO., LTD., GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE, CO., LTD., STATE GRID HEBEI ELECTRIC POWER COMPANY CO., LTD.Inventors: Lidong Lv, Cheng Zhong, Fengzhen Zhou, Weiwei Miao, Yun Liang, Binglin Li, Jinghong Guo, Ningxi Song, Han Su
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Publication number: 20190013753Abstract: Provided are a control method and system for enhancing an endurance capability to an abnormal voltage of a wind turbine generator system. The control method, includes; providing a doubly-fed wind turbine generator system connected to a power grid; detecting a voltage of the power grid, and determining whether the voltage of the power grid has a fault; when the voltage of the power grid has a fault, detecting a voltage of the DC buses, and determining whether the voltage of the DC buses exceeds a limit value; when the voltage of the DC buses exceeds the limit value, performing integrated system coordination control according to an abnormal operating condition mode; and when the voltage of the power grid returns to a normal range, performing integrated system coordination control on the according to a normal operating condition mode.Type: ApplicationFiled: February 8, 2017Publication date: January 10, 2019Applicants: WIND POWER TECHNOLOGY CENTER OF GANSU ELECTRIC POWER COMPANY, STATE GRID CORPORATION OF CHINA, GANSU ELECTRIC POWER COMPANY OF STATE GRID, SHANGHAI JIAO TONG UNIVERSITYInventors: Ningbo Wang, Liang Lu, Kun Ding, Shiyuan Zhou, Chen Zhang, Jin Li, Zheng Li, Nianzong Bai, Jing Zhi, Xu Cai, Youming Cai
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Publication number: 20180364292Abstract: A concomitant impedance protection method for a half-wavelength power transmission line includes that: three-phase currents and three-phase voltages of a relay protection device mounting position at an M side and a relay protection device mounting position at an N side of the half-wavelength power transmission line are acquired respectively; it is judged whether starting amounts of an M side and an N side meet starting conditions or not; a failure point F is determined according to a time difference when the starting amounts of the M side and the N side meet the starting conditions; and a relay protection action of the half-wavelength power transmission line is started according to concomitant impedance of the half-wavelength power transmission line.Type: ApplicationFiled: June 30, 2016Publication date: December 20, 2018Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, CENTRAL CHINA BRANCH OF STATE GRID CORPORATION OF CHINAInventors: Dingxiang Du, Huanzhang Liu, Zexin Zhou, Xuming Liang, Yarong Guo, Xingguo Wang, Lianhai Li, Delin Wang, Xiao Li, Xiangwen Chen
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Patent number: 10158223Abstract: The present invention relates to a method for generating a current differential protection supernode based on an electrical topology of a regional distribution network, which belongs to the fields of automation of electrical power systems and relay protection. The present invention generates several supernode differential protection elements, i.e., differential protection objects, and backup differential protection elements by circularly using a depth-first search method according to the inputted branch-node associative data table reflecting the electrical topology of the distribution network. the present invention can accurately located and quickly isolate the faults in the distribution network system, reduce the probability of power cut in the non-fault lines, reduce the coverage of power cut, quickly reconstruct and self-heal the distribution network, and solve the effect of the distributed access system on the distribution network protection.Type: GrantFiled: October 16, 2012Date of Patent: December 18, 2018Assignees: XJ GROUP CORPORATION, STATE GRID CORPORATION OF CHINAInventors: Xing Liu, Xiaohui Song, Yong Wei, Guobin Li, Dingguo Wang, Junfeng Di
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Patent number: 10153640Abstract: The present invention discloses a novel Unified Power Flow Controller UPFC and its control method. Supposing that one end of DC converter is connected to the DC transmission line of HVDC converter station or substation and the other end is connected to the DC side of a series converter, the AC output voltage of the series converter can be controlled to regulate the line power of the UPFC for operation in UPFC and SSSC mode. In addition, when the number of transformers and shunt converters is decreased at the shunt side of the UPFC, the HVDC Converter Station can be used to provide active power for the series converter of UPFC, which can effectively reduce operation costs and ensure stable operation of power grid. Therefore, there is a bright application prospect for the invention.Type: GrantFiled: November 30, 2016Date of Patent: December 11, 2018Assignees: State Grid Jiangsu Electric Power Research Institute, State Grid Corporation of ChinaInventors: Jiankun Liu, Ningyu Zhang, Qun Li, Jing Chen, Peng Li
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Patent number: 10148080Abstract: A single-phase-to-earth fault processing device for a neutral non-effectively grounded distribution network includes a split-phase arc quenching device connected between earth and a three-phase bus of the distribution network, and a controller with an input end connected with a single-phase-to-earth phase selection device of the distribution network. The split-phase arc quenching device includes a multiphase switching device which operates independently for each phase, and a fuse connected in series with the multiphase switching device. The controller is for controlling opening and closing of three single-phase switches in the multiphase switching device. A single-phase-to-earth fault processing method firstly controls the split-phase arc quenching device to preprocess the fault. If the fault still exists, through a ground resistor a zero-sequence current is generated on a fault line.Type: GrantFiled: September 10, 2014Date of Patent: December 4, 2018Assignees: STATE GRID CORPORATION OF CHINA, STATE GRID SHAANXI ELECTRIC POWER RESEARCH INSTITUTEInventors: Jian Liu, Pinde Li, Xiaoqing Zhang, Zhihua Zhang, Shuren Zhao