Patents Assigned to Electric Power Research Institute
  • Publication number: 20190305589
    Abstract: 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: Application
    Filed: November 3, 2017
    Publication date: October 3, 2019
    Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA
    Inventors: Wanxing SHENG, Xiaohui SONG, Yu ZHANG, Jianfang LI, Fei GAO, Yajie LI, Shanshan ZHAO
  • Patent number: 10391473
    Abstract: The invention is directed to a polymer-protected sorbent that is at least partially covered by, or in contact with, a polymer that acts to protect or shield the sorbent from the surrounding environment, such as a liquid or gas stream within which the sorbent is being used. The sorbent is a sorbent material made of sorbent particles and can be used to remove certain chemical species, such as trace level toxic species, from a given liquid or gas, such as a liquid or gas stream in an industrial process, such as wet flue gas desulfurization process or a wastewater treatment process.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 27, 2019
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Ramsay Chang, Joseph A. Swisher, Timothy G. Ebner, Kevin M. Fisher
  • Patent number: 10362000
    Abstract: A method for providing a virtual Wi-Fi network with secure tunnel provisioning is disclosed. The method provides a reliable, persistent connection between wireless communications enabled devices located at a user's premises and a service provider, and includes the steps of using a software code running on a computing device to pass instructions including a remote server address to an Application Programming Interface (API) running on a wireless router connected to the computing device through a Local Area Network (LAN); using the wireless router to establish a secure communication session with the remote server through a Wide Area Network (WAN); receiving at the wireless router through the WAN parameters required to set up a wireless Virtual Local Area Network (VLAN); and using the router, establishing a wireless VLAN at the user's premises and connecting the wireless VLAN to the remote server through the WAN using a secure tunnel connection.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 23, 2019
    Assignee: Electric Power Research Institute, Inc.
    Inventor: Timothy Godfrey
  • Publication number: 20190170822
    Abstract: 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: Application
    Filed: January 22, 2019
    Publication date: June 6, 2019
    Applicants: 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 D
    Inventors: Peng LUO, Hui FAN, Jingchao YANG, Xiaoguang HAO, Yuhao ZHAO, Lei HE, Qun RAO
  • Patent number: 10290066
    Abstract: 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: Grant
    Filed: April 25, 2018
    Date of Patent: May 14, 2019
    Assignees: China Electric Power Research Institute Company Li, State Grid Corporation of China, CLP Puri Zhangbei Wind Power Research & Testing Co
    Inventors: Weisheng Wang, Chun Liu, Chi Li, Yuehui Huang, Yuefeng Wang, Cun Dong, Nan Zhang, Xiaofei Li, Yunfeng Gao, Xiaoyan Xu, Yanping Xu, Xiaofeng Pan
  • Publication number: 20190107517
    Abstract: A backfilling-type online chromatographic detector for sulphur hexafluoride decomposition products includes: a compression pump, a vacuum pump, a gas storage tank, a first six-way valve, a second six-way valve, a first chromatographic column, a second chromatographic column and a detector. One end of the compression pump is connected to one end of the vacuum pump, another end of the vacuum pump is connected to one end of the gas storage tank, another end of the gas storage tank is connected to the first chromatographic column through the first six-way valve, the first chromatographic column is connected to the second chromatographic column through the second six-way valve, and the second chromatographic column is connected to the detector.
    Type: Application
    Filed: June 2, 2017
    Publication date: April 11, 2019
    Applicant: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID CO., LTD.
    Inventors: Yongyan ZHOU, Li LI, Xiaopeng FAN, Nian TANG, Chengji HUANG, Xiaodian LI, Jiawen LIU, Peiqi WU
  • Patent number: 10243332
    Abstract: A method of replacing pipe-type power cables is disclosed. The method includes the steps of using a pipe cutting rod to burst existing pipe; using an expander to expand soil surrounding the existing pipe to create a path for a new conduit or pipe; pulling the new conduit or pipe into the path created by the expander; and pulling new cables into the conduit or pipe.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: March 26, 2019
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Tiebin Zhao, Jay A. Williams
  • Patent number: 10217533
    Abstract: In general, the present invention is directed to novel nuclear fuel rod claddings that have better performance characteristics compared to current claddings, particularly during a severe accident, such as a loss of coolant accident. The present invention provides a duplex cladding having two layers, an inner Mo or Mo-alloy layer and a protective layer disposed on the outside of the Mo or Mo-alloy layer. Optionally, the Mo or Mo-alloy layer may have a coating disposed on its inner surface to provide additional capability with the fuel pellets, thereby creating a triplex cladding.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: February 26, 2019
    Assignee: Electric Power Research Institute, Inc.
    Inventor: Bo-Ching Cheng
  • Patent number: 10218176
    Abstract: A method and a device for controlling a local voltage are provided. The method includes: obtaining a first voltage value of a high-voltage side bus in a local transformer substation; determining a control strategy according to a starting threshold value for a voltage enhancement control, a starting threshold value for an under-voltage load shedding and the first voltage value of the high-voltage side bus; and performing the control strategy to control a charging power of an electric vehicle charging station corresponding to the local transformer substation, so as to control the local voltage of the local transformer substation.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: February 26, 2019
    Assignees: TSINGHUA UNIVERSITY, ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID CO., LTD.
    Inventors: Qinglai Guo, Hongbin Sun, Boming Zhang, Wenchuan Wu, Huaichang Ge, Mingye Zhang, Yongwang Zhang, Wei Zhao, Guoying Lin
  • Patent number: 10211665
    Abstract: The present invention provides an energy management method of a multi-type battery energy storage power station considering charge and discharge rates, that includes: reading related data of the battery energy storage power station; calculating charge or discharge rate characteristic values of battery energy storage machine sets; calculating initial power command values of the battery energy storage machine sets; judging whether the initial power command values of the battery energy storage machine sets exceed the maximum allowable charge or discharge power of the machine sets in real time, if more than, online correcting and re-calculating the initial power command values of the battery energy storage machine sets; otherwise, setting the initial power command values of the energy storage machine sets as the power command values thereof; and summarizing the power command values of the battery energy storage machine sets, and outputting the same.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: February 19, 2019
    Assignees: ZHANGJIAKOU WIND AND SOLAR POWER ENERGY DEMONSTRATION STATION Co. LTD., STATE GRID XIN YUAN COMPANY, CHINA ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Xiangjun Li, Dong Hui, Xiaokang Lai, Mingjie Gao, Shaoyu Liu
  • Patent number: 10209293
    Abstract: A sensor to monitor health of surge arresters such as metal oxide arresters is disclosed. The sensor including a housing; a sensor assembly contained in the housing, and a voltage measurement strap extending around a periphery of the housing. The voltage measurement strap being electrically connected to the electronics board and configured to measure voltage using electric field. The sensor assembly including: an electronics board to receive, transmit, process, and store signals; a Rogowski coil electrically connected to the electronics board to measure surge currents diverted by the surge arrestor; and a current transformer electrically connected to the electronics board to measure leakage current.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 19, 2019
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Andrew John Phillips, Christiaan Engelbrecht, Robert Carlton Lynch, J. Mark Major
  • Publication number: 20180364292
    Abstract: 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: Application
    Filed: June 30, 2016
    Publication date: December 20, 2018
    Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, CENTRAL CHINA BRANCH OF STATE GRID CORPORATION OF CHINA
    Inventors: Dingxiang Du, Huanzhang Liu, Zexin Zhou, Xuming Liang, Yarong Guo, Xingguo Wang, Lianhai Li, Delin Wang, Xiao Li, Xiangwen Chen
  • Patent number: 10153640
    Abstract: 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: Grant
    Filed: November 30, 2016
    Date of Patent: December 11, 2018
    Assignees: State Grid Jiangsu Electric Power Research Institute, State Grid Corporation of China
    Inventors: Jiankun Liu, Ningyu Zhang, Qun Li, Jing Chen, Peng Li
  • Patent number: 10148080
    Abstract: 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: Grant
    Filed: September 10, 2014
    Date of Patent: December 4, 2018
    Assignees: STATE GRID CORPORATION OF CHINA, STATE GRID SHAANXI ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Jian Liu, Pinde Li, Xiaoqing Zhang, Zhihua Zhang, Shuren Zhao
  • Patent number: 10141743
    Abstract: The present invention discloses a Bipolar VSC-HVDC and UPFC Hybrid Topology and its operation method. The first control circuit includes a positive and a negative circuit at the series side, in which the VSC converter can operate in bipolar mode; the second control circuit includes a positive and a negative circuit, in which the VSC converter can operate in bipolar mode; the third control circuit is the same as the second control circuit in terms of structure; the positive electrode and negative electrode of the second control circuit are connected to the DC bus via a DC breaker respectively; the other end of the DC transmission line is connected to the third control circuit via a DC breaker.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: November 27, 2018
    Assignees: State Grid Jiangsu Electric Power Research Institute, State Grid Corporation of China
    Inventors: Peng Li, Jinjiao Lin, Xiangping Kong, Lei Gao, Haosheng Huang, Xinyue Gong, Yubo Yuan
  • Publication number: 20180316190
    Abstract: 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: Application
    Filed: November 30, 2016
    Publication date: November 1, 2018
    Applicants: State Grid Jiangsu Electric Power Research Institute, State Grid Corporation of China
    Inventors: Jiankun LIU, Ningyu ZHANG, Qun LI, Jing CHEN, Peng LI
  • Patent number: 10112499
    Abstract: A method for controlling charging and discharging of an electric vehicle, the method comprising: first, analyzing information such as the battery status and the history default rate of electric vehicles applying for joining a power-grid charging and discharging service, and screening out an electric vehicle that can participate in the charging and discharging service for electric vehicles in the future; then, determining an optimal combination state of a generator set and the electric vehicle by using a method of electric energy transmission cost comparison; and further monitoring in real time the status of the electric vehicle during charging and discharging, and performing real-time power control on the electric vehicle, whereby an electric vehicle aggregator not only can meet the requirements on the charging and discharging service of the power system, but also can implement energy management and real-time control of the electric vehicles during charging and discharging, thereby reducing the effect of char
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: October 30, 2018
    Assignees: State Grid Chongqing Electric Power Co. Electric Power Research Institute, State Grid Corporation of China
    Inventors: Lefeng Shi, Zhengfa Liu, Xingzhe Hou, Yongxiang Liu, Lin Gong, Huicai Wang, Zewei Yang
  • Publication number: 20180307594
    Abstract: A standard conformance testing system and method for a CIM/E model of a power system and a storage medium include: converting the standards “Power Grid Common Model Description Specification (GB/T 30149)” and “Power Grid Operating Model Data Exchange Specification (DL/T 1380)” into practically operable testing rules, and performing automatic generation and verification of a CIM/E standard model and defect model. The testing system and method can improve the comprehensiveness and standardization of a CIM/E model standard compliance test, improving testing efficiency, promoting the level of standardization according to the CIM/E model in a power system software development process, and real time data exchange and interoperation between respective application systems, effectively supporting the safe and stable operation of a power grid.
    Type: Application
    Filed: July 4, 2016
    Publication date: October 25, 2018
    Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA
    Inventors: Linpeng Zhang, Yujia Li, Qingbo Yang, Lixin Li, Fangchun Di, Yunhao Huang, Dapeng Li, Lei Tao, Yangchun Hao, Zhenyu Chen
  • Publication number: 20180309298
    Abstract: The present invention discloses a Bipolar VSC-HVDC and UPFC Hybrid Topology and its operation method. The first control circuit includes a positive and a negative circuit at the series side, in which the VSC converter can operate in bipolar mode; the second control circuit includes a positive and a negative circuit, in which the VSC converter can operate in bipolar mode; the third control circuit is the same as the second control circuit in terms of structure; the positive electrode and negative electrode of the second control circuit are connected to the DC bus via a DC breaker respectively; the other end of the DC transmission line is connected to the third control circuit via a DC breaker.
    Type: Application
    Filed: November 16, 2016
    Publication date: October 25, 2018
    Applicants: State Grid Jiangsu Electric Power Research Institute, State Grid Corporation of China
    Inventors: Peng LI, Jinjiao LIN, Xiangping KONG, Lei GAO, Haosheng HUANG, Xinyue GONG, Yubo YUAN
  • Patent number: 10107838
    Abstract: The present invention provides an online monitoring circuit of the series compensation spark gap divider return circuit. Said series compensation spark gap divider return circuit includes a voltage equalization link and a voltage sampling link. Said voltage link includes the capacitor C which series said voltage equalization link. Said online monitoring circuit includes the voltage sampling input module, series compensation current input module and the compare module. Said sampling voltage input module after amplified the voltage of the two ends of the series capacitor C converts it into direct current signal.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: October 23, 2018
    Assignees: STATE GRID COOPERATION OF CHINA, CHINA ELECTRIC POWER RESEARCH INSTITUTE
    Inventors: Guofu Li, Hui Yu, Zhiyuan Li, Yongliang Li