Patents by Inventor Delin Wang
Delin Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11749985Abstract: A method and device for timing in time-varying distance protection based on multiple lines of a tower. The method includes: collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters; calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result; calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time of a section-II distance protection action and final time of a section-III distance protection action; and determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time of the section-II distance protection action.Type: GrantFiled: October 31, 2019Date of Patent: September 5, 2023Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Zexin Zhou, Tianhua Li, Hong Cao, Yarong Guo, Xingguo Wang, Dingxiang Du, Delin Wang, Pengfei Lv, Zhi Zhang
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Publication number: 20220239093Abstract: A method and device for timing in time-varying distance protection based on multiple lines of a tower. The method includes: collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters; calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result; calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time of a section-II distance protection action and final time of a section-III distance protection action; and determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time of the section-II distance protection action.Type: ApplicationFiled: October 31, 2019Publication date: July 28, 2022Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINAInventors: Zexin ZHOU, Tianhua LI, Hong CAO, Yarong GUO, Xingguo WANG, Dingxiang DU, Delin WANG, Pengfei LV, Zhi ZHANG
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Patent number: 11384798Abstract: An angle-adjustable tripod universal joint which has one tripod, three rollers and one universal joint outer part. An inner wall of the universal joint outer part has three roller tracks, and one roller is disposed in each of the roller tracks and rolls along the roller track. The inner cavity of each roller has a rotatably disposed spherical shaft head of the tripod. The inner wall of each roller track has a guiding groove. The peripheral shape of each roller is cylindrical. The bottom surface of the guiding groove is a plane surface, and two side surfaces of the guiding groove are flat surfaces perpendicular to the plane surface. The peripheral surface of each roller is partially inserted into the corresponding guiding groove, and the peripheral surface of the roller is tangent to the corresponding plane surface.Type: GrantFiled: March 3, 2017Date of Patent: July 12, 2022Assignee: Shanghai GKN Huayu Driveline Systems Company LimitedInventors: Xiaotian Li, Tangjun Peng, Delin Wang, Zhenghua Zhang, Lu Jin
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Patent number: 10985547Abstract: 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: GrantFiled: July 11, 2016Date of Patent: April 20, 2021Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, CENTRAL CHINA BRANCH OF STATE GRID CORPORATION OF CHINAInventors: Xuming Liang, Yarong Guo, Huanzhang Liu, Xiao Li, Zexin Zhou, Dingxiang Du, Delin Wang, Jing Li, Huixin Li, Zhongqing Li
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Patent number: 10778003Abstract: A method of free wave energy protection for a half-wavelength line based on a one-sided current includes: performing sampling and calculation on a current at protection measuring points to obtain variations in current sampling values; and activating a protective element to determine an occurrence time of a fault in a half-wavelength line. A free wave energy protection section includes a quick-action section, a basic section and a sensitive section, wherein the quick-action section, the basic section and the sensitive section serve as action criteria for performing protection with respect to the free wave energy of the half-wavelength line.Type: GrantFiled: July 18, 2016Date of Patent: September 15, 2020Assignees: CHINA ELECTRIC POWER RESEARCH INST. CO. LIMITED, STATE GRID CORPORATION OF CHINA, STATE GRID CENTRAL CHINA GRID COMPANY LTD.Inventors: Huanzhang Liu, Zexin Zhou, Dingxiang Du, Yarong Guo, Xiao Li, Xuming Liang, Delin Wang, Xingguo Wang
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Patent number: 10605852Abstract: 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: GrantFiled: June 30, 2016Date of Patent: March 31, 2020Assignees: 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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Publication number: 20190323650Abstract: The present disclosure relates to an angle-adjustable tripod universal joint, which includes a tripod, 3 rollers and a universal joint outer part, an inner wall of the universal joint outer part is provided with 3 roller track, each roller is disposed in the roller track and rolls along the roller track, each spherical shaft head on the tripod is rotatably disposed in an inner cavity of the roller, the inner wall of the roller track is provided with a guiding groove, the peripheral shape of the roller is cylindrical, a bottom surface of the guiding groove is a plane surface, two side surfaces of the guiding groove are flat surfaces perpendicular to the plane surface, a part of the peripheral surface of the roller is inserted into the guiding groove, and the peripheral surface of the roller is tangent to the plane surface.Type: ApplicationFiled: March 3, 2017Publication date: October 24, 2019Applicant: Shanghai GKN Huayu Driveline Systems Company LimitedInventors: Xiaotian LI, Tangjun PENG, Delin WANG, Zhenghua ZHANG, Lu JIN
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Publication number: 20190013667Abstract: A method of free wave energy protection for a half-wavelength line based on a one-sided current includes: performing sampling and calculation on a current at protection measuring points to obtain variations in current sampling values; and activating a protective element to determine an occurrence time of a fault in a half-wavelength line. A free wave energy protection section includes a quick-action section, a basic section and a sensitive section, wherein the quick-action section, the basic section and the sensitive section serve as action criteria for performing protection with respect to the free wave energy of the half-wavelength line.Type: ApplicationFiled: July 18, 2016Publication date: January 10, 2019Inventors: Huanzhang Liu, Zexin Zhou, Dingxiang Du, Yarong Guo, Xiao Li, Xuming Liang, Delin Wang, Xingguo Wang
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Publication number: 20180375322Abstract: 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: ApplicationFiled: July 11, 2016Publication date: December 27, 2018Inventors: Xuming LIANG, Yarong GUO, Huanzhang LIU, Xiao LI, Zexin ZHOU, Dingxiang DU, Delin WANG, Jing LI, Huixin LI, Zhongqing LI
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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