Patents Assigned to State Grid Corporation of China
  • Publication number: 20210278464
    Abstract: Disclosed is a condition assessment method for an outdoor post-mounted vacuum switch. The method includes: establishing a condition assessment mathematical model for the post-mounted vacuum switch and acquiring scores of condition indicators of the post-mounted vacuum switch; and acquiring a condition assessment score based on the condition assessment mathematical model of the post-mounted vacuum switch and according to the scores of the condition indicators of the post-mounted vacuum switch so as to realize on-line monitoring of a health condition of the post-mounted vacuum switch and assess the health condition of the post-mounted vacuum switch. Further disclosed is a condition assessment device for the outdoor post-mounted vacuum switch.
    Type: Application
    Filed: December 11, 2018
    Publication date: September 9, 2021
    Applicants: STATE GRID JIANGXI ELECTRIC POWER COMPANY LIMITED RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA, NANCHANG KECHENG ELECTRIC POWER TEST AND RESEARCH CO., LTD.
    Inventors: Ning Xu, Jianbing Pan, Ruixiang Fan, Zaide Xu, Bei Cao, Yang Liu, Yuan Xu, Hongxia Xiao
  • Patent number: 11095126
    Abstract: Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: August 17, 2021
    Assignees: State Grid Zhejiang Electric Power Co., Ltd. Taizhou Power Supply Company, State Grid Corporation of China
    Inventors: Xiaoping Fu, Wenqi He, Chi Zhang, Dongbo Zhang, Daojian Hong, Yuande Zheng, Minzhi Chen, Mingxu Chen, Zhen Huang, Guode Ying
  • Publication number: 20210216698
    Abstract: Provided are an insulation coordination method and system for a series compensation apparatus, a storage medium and an electronic device.
    Type: Application
    Filed: July 25, 2019
    Publication date: July 15, 2021
    Applicants: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Jing Ge, Zhengang Lu, Guoliang Zhao, Linhai Cai, Haijun Liu
  • Patent number: 11062078
    Abstract: Provided are an insulation coordination method and system for a series compensation apparatus, a storage medium and an electronic device.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: July 13, 2021
    Assignees: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Jing Ge, Zhengang Lu, Guoliang Zhao, Linhai Cai, Haijun Liu
  • Publication number: 20210205643
    Abstract: Provided are a fire extinguishing method and a fire extinguishing system for a lithium ion battery, an electronic device and a storage medium. The method includes: real-timely collecting environmental parameter values in a battery box where a lithium ion batteries are placed; determining a safety level of the lithium ion battery according to the environmental parameter values and a preset threshold of each environmental parameter, and sending a fire extinguishing command to a fire extinguishing device according to a preset fire extinguishing control program, where the fire extinguishing control program is a fire extinguishing strategy corresponding to the safety level of the lithium ion battery; and enabling the fire extinguishing device to execute a fire extinguishing operation according to the fire extinguishing command.
    Type: Application
    Filed: July 16, 2019
    Publication date: July 8, 2021
    Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA
    Inventors: Kai Yang, Fei Gao, Kangkang Wang, Chaoqun Liu, Mingjie Zhang, Hao Liu, Guangqing Jia, Mengmeng Geng, Kaifeng Wang
  • Patent number: 11043808
    Abstract: A method for identifying a pattern of a load cycle includes: performing statistics on a daily load of a system based on smart meter data; generating a curve of the daily load of the system according to the statistics on the daily load of the system; acquiring a result of clustering curves of loads of typical days by applying shape-based time sequence clustering analysis using the curve of the daily load of the system; and identifying a pattern of a load cycle according to the result of clustering the curves of the loads of the typical days.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: June 22, 2021
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE CO. LTD., STATE GRID CORPORATION OF CHINA, STATE GRID FUJIAN ELECTRIC POWER RESEARCH INST., GLOBAL ENERGY INTERCONNECTION RES. INST. CO. LTD.
    Inventors: Zhenyu Chen, Dapeng Li, Yunhao Huang, Fangchun Di, Lixin Li, Guangyi Liu, Wendong Zhu, Yangchun Hao, Yi Zhang, Jinxiang Chen
  • Patent number: 11043818
    Abstract: The disclosure provides a stochastic look-ahead dispatch method for power system based on Newton method, belonging to power system dispatch technologies. The disclosure analyzes historical data of wind power output, and uses statistical or fitting software to perform Gaussian mixture model fitting. A dispatch model with chance constraints is established for system parameters. Newton method is to solve quantiles of random variables obeying Gaussian mixture model, so that chance constraints are transformed into deterministic linear constraints, thus transforming original problem to convex optimization problem with linear constraints. Finally, the model is solved to obtain look-ahead dispatch. The disclosure employs Newton method to transform chance constraints containing risk level and random variables into deterministic linear constraints, which effectively improves model solution efficiency, and provides reasonable dispatch for decision makers.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: June 22, 2021
    Assignees: TSINGHUA UNIVERSITY, STATE GRID CORPORATION OF CHINA
    Inventors: Wenchuan Wu, Bin Wang, Mingjie Li, Hongbin Sun, Qinglai Guo, Yue Yang, Shuwei Xu
  • Patent number: 10985547
    Abstract: A current differential protection method for a self-adaptive half-wavelength line based on a time-difference method. Since an electrical distance of half-wavelength power transmission is long, after a fault occurs, there is an obvious time difference between the actuation times for protecting starting elements at two sides of a line. According to the principles of wave propagation, the position of a fault point can be determined by means of a difference between the actuation times for protecting the starting elements at the two sides of the line. By means of taking the fault point as a differential point, a current value at the differential point can be obtained according to a long line equation by means of the voltage and current at protection-mounted positions at the two sides of the line, and a differential current is then calculated.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: April 20, 2021
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, CENTRAL CHINA BRANCH OF STATE GRID CORPORATION OF CHINA
    Inventors: Xuming Liang, Yarong Guo, Huanzhang Liu, Xiao Li, Zexin Zhou, Dingxiang Du, Delin Wang, Jing Li, Huixin Li, Zhongqing Li
  • Patent number: 10951110
    Abstract: Disclosed in embodiments of the present invention are a control method and device for an alternating-current and direct-current conversion circuit, and a computer storage medium. The alternating-current and direct-current conversion circuit comprises a first commutation unit, a second commutation unit, and a coupling unit. By obtaining voltage information and current information of the alternating-current and direct-current conversion circuit, a controllable device of the first commutation unit can be controlled to be turned on in delay or turned off in advance; and the second commutation unit is controlled to work in a controllable rectification state or a controllable inversion state or an uncontrollable rectification state.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: March 16, 2021
    Assignees: Global Energy Interconnection Research Institute Co., Ltd, State Grid Corporation of China
    Inventors: Zhanfeng Deng, Jun Ge, Guoliang Zhao, Jieying Song, Weiguo Li, Zhengang Lu, Yunfei Xu, Zhe Zhou, Haijun Liu, Dong Liang, Xiaolin Mo, Pengliang Xu, Guofu Chen, Xiang Wang, Guozhong Zhang, Weidong Shen, Wenyuan Ning, Feng Wang
  • Publication number: 20210055339
    Abstract: Provided are an insulation diagnosis and defect positioning method, apparatus and device for an insulated bus pipe, and a storage medium.
    Type: Application
    Filed: January 6, 2020
    Publication date: February 25, 2021
    Applicants: STATE GRID HUBEI ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA
    Inventors: Wenpei Li, Ling Ruan, Rui Liu
  • Patent number: 10923916
    Abstract: The disclosure provides a stochastic dynamical unit commitment method for power system based on solving quantiles via Newton method, belonging to power system technologies. The method establishes a unit commitment model with chance constraints for power system parameters. Quantiles of random variables obeying mixed Gaussian distribution is solved by Newton method, and chance constraints are transformed into deterministic linear constraints, so that original problem is transformed into mixed integer linear optimization problem. Finally, the model is solved to obtain on-off strategy and active power plan of units. The disclosure employs Newton method to transform chance constraints containing risk level and random variables into deterministic mixed integer linear constraints, which effectively improves the model solution efficiency, eliminates conservative nature of conventional robust unit commitment, provides reasonable dispatch basis for decision makers.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: February 16, 2021
    Assignees: TSINGHUA UNIVERSITY, STATE GRID CORPORATION OF CHINA
    Inventors: Wenchuan Wu, Bin Wang, Mingjie Li, Hongbin Sun, Qinglai Guo, Yue Yang, Shuwei Xu
  • Patent number: 10922452
    Abstract: A digital simulation system of a power distribution network, comprising: a client and a server end. The server end is a simulation server cluster composed of several simulation servers; the simulation server cluster and the client are mutually connected through a communication bus, wherein the client is configured to use a DCOM component to invoke a simulation service provided by the server end, and the server end is configured to distribute a task to be processed to each cluster node. Constructing the above-mentioned digital simulation system facilitates an optimal planning and operation of a smart power distribution network, thereby improving the utilization efficiency and reliability of the smart power distribution network and reducing the loss of a power outage.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 16, 2021
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA
    Inventors: Keyan Liu, Wanxing Sheng, Yinglong Diao, Jiangang Tang, Xueshun Ye, Kaiyuan He, Dongli Jia, Lijuan Hu
  • Publication number: 20210012302
    Abstract: Provided is a system for constructing mobile electric energy interconnection. The system includes at least one mobile electric energy exchange device, a mobile electric energy interconnection management platform and at least one stationary electric energy interconnection device. The mobile electric energy interconnection management platform is configured to match the at least one mobile electric energy exchange device with the at least one stationary electric energy interconnection device, and push a matching result to the at least one mobile electric energy exchange device and the at least one stationary electric energy interconnection device. Also provided is a method for constructing mobile electric energy interconnection, a data testing method and device, and a computer readable storage medium.
    Type: Application
    Filed: November 30, 2018
    Publication date: January 14, 2021
    Applicants: INFORMATION AND COMMNUNICATION BRANCH, STATE GRID JIANGXI ELECTRIC POWER COMPANY, STATE GRID CORPORATION OF CHINA
    Inventors: Xianming LIU, Chi E, Ming CHENG, Hongjie SHEN, Jun LI, Xin SUN, Zhenwen TAO, Hong JIANG, Bin LI, Jianxu WANG, Zilan ZHOU
  • Patent number: 10890160
    Abstract: 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: Grant
    Filed: February 8, 2017
    Date of Patent: January 12, 2021
    Assignees: Wind Power Technology Center of Gansu Electric Power Company, State Grid Corporation of China, Gansu Electric Power Company of State Grid, Shanghai Jiao Tong University
    Inventors: Ningbo Wang, Liang Lu, Kun Ding, Shiyuan Zhou, Chen Zhang, Jin Li, Zheng Li, Nianzong Bai, Jing Zhi, Xu Cai, Zifen Han, Youming Cai
  • Publication number: 20200395159
    Abstract: A flow-guiding rod includes a cooling channel provided in a rod portion of the flow-guiding rod, and a coolant inlet pipe and a coolant outlet pipe provided on end(s) of the flow-guiding rod. The coolant inlet pipe and the coolant outlet pipe are communicated with the cooling channel.
    Type: Application
    Filed: November 21, 2018
    Publication date: December 17, 2020
    Applicants: STATE GRID CORPORATION OF CHINA, TSINGHUA UNIVERSITY
    Inventors: Shan LIU, Licheng LU, Zehong LIU
  • Patent number: 10847968
    Abstract: Provided are a differential protection method and system, applied to a multi-terminal T-connection transmission line. The method includes: selecting two slaves without a connection and connecting the two slaves to construct a slave group; determining a target slave and an auxiliary slave in the slave group, where a first communication path is connected along a channel one, a channel two and a channel three, and a second communication path is connected along the channel three, the channel two and the channel one; transmitting, by the target slave, two frames of messages, and acquiring a delay difference between a transceiving delay of the first communication path and a transceiving delay of the second communication path, where a first frame of messages is transmitted to the target slave via the first communication path, a second frame of messages is transmitted to the target slave via the second communication path.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: November 24, 2020
    Assignees: TAIZHOU POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER, STATE GRID CORPORATION OF CHINA
    Inventors: Ping Zhao, Yiping Shen, Yutao Qiu, Hua Xu, Hao Tan, Rijun Wang, Yuande Zheng, Hao Li, Zaibing Zhou, Guode Ying, Kang Wang, Jian Wu, Tao Zhu, Ben Li, Xiaochun Xu, Qingchun Zhao, Xiaotong Zhu, Zhen Huang
  • Patent number: 10832179
    Abstract: Embodiments provide a method for constructing a future-state power grid model and device, including that: a current power grid model, an equipment power-off plan, an equipment retirement plan and an equipment addition plan are acquired; then, equipment is added according to the current power grid model, and an added equipment information set, a retired equipment information set and a powered-off equipment information set are determined according to the equipment addition plan, the equipment retirement plan and the equipment power-off plan respectively; and finally, a state of the added equipment is set to be an operating state, an initial network model of each period is formed according to a time sequence, and a future-state network model is constructed according to the added equipment information set, the retired equipment information set, the powered-off equipment information set and the initial network models. The embodiments further provide construction equipment and a storage medium.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: November 10, 2020
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE CO. LTD., STATE GRID CORPORATION OF CHINA, STATE GRID SICHUAN ELECTRIC POWER COMPANY
    Inventors: Guodong Huang, Qiang Ding, Zelei Zhu, Sai Dai, Hui Cui, Dan Xu, Zhi Cai, Bo Li, Chenxu Hu, Chuancheng Zhang, Jinghua Yan, Deyue Men, Jiali Zhang, Peijun Li, Zhen Sun
  • Patent number: 10833508
    Abstract: An active power distribution network multi-time scale coordinated optimization scheduling method and storage medium are provided. The method includes the following steps: performing long-time scale optimization scheduling of an active power distribution network; performing short-time scale rolling optimization scheduling on the basis of MPC of the active power distribution network according to an optimization result of the long-time scale optimization scheduling of the active power distribution network. By using a model prediction control method, taking the long-time scale optimization scheduling result as a reference, and performing short-time scale rolling correction, the optimization scheduling of the active power distribution network is achieved, thereby reducing unfavorable influences of prediction precision of a distributed power supply and a low-voltage load on the optimization scheduling.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: November 10, 2020
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, NORTH CHINA ELECTRIC POWER UNIVERSITY, STATE GRID BEIJING ELECTRIC POWER COMPANY, STATE GRID TIANJIN ELECTRIC POWER COMPANY
    Inventors: Xiaohui Wang, Tianjiao Pu, Lei Dong, Naishi Chen, Ye Li, Jiancheng Yu, Renle Huang, Xianjun Ge, Zhihong Li, Minghao Ai, Fumin Qu, Liqiang Zhao
  • Patent number: 10826295
    Abstract: A method and an apparatus for determining the distributed power supply capacity to be accessed by a feed line of a power distribution network, and a storage medium, the method comprising: determining feed line loss on the basis of load information of power distribution network feed line access nodes and circuit parameters; on the basis of the feed line loss, determining three-phase voltage change values of the feed line circuit; using a single phase having the greatest voltage change amongst the voltage change values, determining a maximum active power for distributed power supply access under voltage constraints; comparing the current of the feed line corresponding to the maximum active power with a circuit current limit, and determining the distributed power supply capacity to be accessed by the feed line; the apparatus comprises a feed line information collection unit, a voltage drop unit, a quantitative calculation unit, and a results analysis unit.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 3, 2020
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE CO. LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Shixiong Fan, Ting Yu, Tianjiao Pu, Lixin Li, Yijun Yu, Zechen Wei, Xingwei Liu, Wei Han, Wei Wang, Chen Li, Shiguang Li, Xinjing Wu, Jiatong Du, Kun Wu
  • Patent number: 10826292
    Abstract: An embodiment provides a multi-time-scale Digital/Analog (D/A) hybrid simulation system and simulation method therefor for a complex power distribution network and a computer storage medium, and is intended to solve existing problems about multi-time-scale modeling and simulation of the complex power distribution network and simulation accuracy and efficiency of the complex power distribution network.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: November 3, 2020
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE CO. LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Wanxing Sheng, Keyan Liu, Xiaoli Meng, Weijie Dong, Yajie Li, Xueshun Ye, Yongmei Liu, Yinglong Diao, Dongli Jia, Lijuan Hu, Kaiyuan He