Patents by Inventor Jie Tian

Jie Tian 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).

  • Publication number: 20200185901
    Abstract: A method and apparatus for suppressing the impact of a compensator on line distance protection is provided, wherein the method comprises: obtaining a first current of a line connected to a compensator or series converters in the compensator, and a first voltage of a bus connected to the compensator or the line connected to the compensator; exiting the series converters and series transformers if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold; exiting the series converters and the series transformers if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet; and otherwise, canceling the setting of the output voltage of the series converters to zero and obtaining a first current if
    Type: Application
    Filed: May 22, 2018
    Publication date: June 11, 2020
    Applicants: NR Electric Co., Ltd., NR Engineering Co., Ltd.
    Inventors: Lei PAN, Jie TIAN, Yunlong Dong, Yu LU, Ruhai HUANG, Chongxue JIANG, Jiang LU, Baoshun ZHANG, Defeng QIU, Hua XIE
  • Publication number: 20200164092
    Abstract: The pH-responsive ultrasensitive fluorescent nanoprobe is composed of pH-responsive matrix materials and fluorescent organic small molecule dyes. The pH-responsive matrix materials are calcium phosphate, calcium hydroxyphosphate, fluorapatite, calcium carbonate or ZIF series; the fluorescent organic small molecule dyes are positively charged dyes or negatively charged dyes. The preparation method includes: coating a positively charged dye with a negatively charged matrix material; coating a negatively charged dye with a negatively charged matrix material; and coating a negatively charged dye with a positively charged matrix material.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 28, 2020
    Applicant: Xidian University
    Inventors: Zhongliang WANG, Yongdong WANG, Ruili ZHANG, Qian JIA, Chaoqiang QIAO, Jie TIAN
  • Publication number: 20200132599
    Abstract: An intraoperative near-infrared-I and near-infrared-II multi-spectral fluorescent navigation system and method of using same includes a light source module for emitting white light and excitation light for illuminating tissue to be tested to generate an emission light. An optical information collection module includes a white light camera for collecting the white light image, and near infrared-I and near infrared-II fluorescence cameras for collecting the near infrared-I and near infrared-II fluorescence images. A central control module is coupled to the light source and the optical information collection modules. An image processing unit pre-processes the white light image, and the near infrared-I and near infrared-II fluorescence images, for de-noising and enhancement.
    Type: Application
    Filed: August 20, 2019
    Publication date: April 30, 2020
    Applicant: INSTITUTE OF AUTOMATION, CHINESE ACADEMY OF SCIENCES
    Inventors: Jie TIAN, Zhenhua HU, Caiguang CAO, Zeyu ZHANG, Meishan CAI
  • Publication number: 20200076321
    Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of changing full bridge sub-modules from a blocked state to a half-blocked state one by one in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of changing the full bridge sub-modules from a blocked state to a bypassed state one by one in the charging process.
    Type: Application
    Filed: January 12, 2018
    Publication date: March 5, 2020
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Jiudong DING, Yu LU, Yunlong DONG, Haiying LI, Jie TIAN, Defeng QIU, Tiangui JIANG, Jianyang LIAN
  • Publication number: 20200064411
    Abstract: A battery includes a housing, an electrical energy storage unit mounted inside the housing, and a battery control system electrically coupled to the electrical energy storage unit to control charge and discharge of the electrical energy storage unit. The battery control system includes one or more processors configured to obtain one or more electrical parameters of the battery in a storage state, determine whether the battery is damaged or abnormal according to the one or more electrical parameters of the battery, and automatically discharge the battery to a safe state in response to determining that the battery is damaged or abnormal.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 27, 2020
    Inventors: Yangyang TANG, Mayue CHEN, Dayang ZHENG, Wentao WANG, Jie TIAN
  • Patent number: 10564103
    Abstract: A dual-mode optical molecular imaging navigation apparatus with a switchable field of view, and an imaging method thereof, are provided in the embodiments of the disclosure, the apparatus including: a camera module configured to perform a color imaging and a fluorescence imaging; a switching module configured to switch between an open imaging mode and an endoscopic imaging mode as per imaging requirements; an open imaging module configured to perform observation and imaging with a large field of view; an endoscopic imaging module configured to perform observation and imaging with a deep field of view; a data processing module configured to provide a camera control software and image capturing, processing and display method; and a support module configured to support and connect the navigation apparatus.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: February 18, 2020
    Assignee: INSTITUTE OF AUTOMATION, CHINESE ACADEMY OF SCIENCES
    Inventors: Jie Tian, Yamin Mao, Chongwei Chi, Xin Yang
  • Patent number: 10524665
    Abstract: A handheld molecular imaging navigation system comprises a multi-spectral light source module configured to provide light in a plurality of different spectrum bands in a time division control manner according to a control signal sequence to irradiate an inspected object; a time division control module configured to generate the control signal sequence; an optical signal acquisition module configured to acquire a near-infrared fluorescence image and a visible light image of the inspected object in a time division control manner according to the control signal sequence provided by the time division control module; and a processing module configured to perform image processing on the acquired near-infrared fluorescence image and visible light image according to the control signal sequence to fuse the visible light image and the fluorescence image and output the fused image, and output a feedback signal according to the acquired near-infrared fluorescence image and visible light image.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: January 7, 2020
    Assignee: INSTITUTE OF AUTOMATION, CHINESE ACADEMY OF SCIENCES
    Inventors: Jie Tian, Chongwei Chi, Xin Yang
  • Patent number: 10523131
    Abstract: A reconfigurable MMC sub-module unit and a control unit thereof are provided, the reconfigurable MMC sub-module unit is mainly formed by an MMC sub-module unit and a reconfigurable mechanism, wherein the reconfigurable mechanism is formed by switches, and the conversion of MMC sub-module unit topology is achieved through switching on and off the switches in the reconfigurable mechanism. According to the reconfigurable MMC sub-module unit and the control unit thereof, the rapid change of a topology structure for a converter can be achieved, which is suitable for the demand of the line connection of the medium-voltage power distribution network and variable topologies, and meets requirements of dynamic simulation experiment for different converter topologies in the dynamic simulation experiment, thereby reducing construction costs and duration, improving experiment efficiency, and having high flexibility and strong versatility.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: December 31, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Gang Li, Jianchun Li, Jie Tian, Haiying Li, Yu Lu, Yunlong Dong, Zhaoqing Hu, Minglian Zhu
  • Patent number: 10483788
    Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: November 19, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Jiudong Ding, Yu Lu, Yunlong Dong, Haiying Li, Jie Tian, Defeng Qiu, Tiangui Jiang, Jianyang Lian
  • Patent number: 10476261
    Abstract: A method for fault positioning and recovery of a voltage source converter includes following steps. Locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage. Positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter. Recovering operation of each station after the fault is positioned. The method for fault positioning and recovery is simple, practical, has high reliability, and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to transmission of the zero sequence voltage of the alternating-current side to an opposite-side alternating-current system via a voltage source converter.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: November 12, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Gang Li, Yu Lu, Zhaoqing Hu, Jie Tian, Yunlong Dong, Tiangui Jiang, Haiying Li, Yadong Feng, Ke Wang, Jiang Lu, Shunke Sui, Hui Wang, Nannan Wang
  • Patent number: 10461534
    Abstract: A starting and stopping method for a static synchronous series compensator (SSSC) is provided. A starting process includes: connecting a converter to a shunt transformer, and closing a breaker which connect the AC system and the shunt transformer to charge the converter until the DC voltage is stable; opening the breaker, and connecting the converter to a series transformer through a change-over switch; and deblocking the converter, and controlling a current of a bypass switch of the series transformer to approach zero. A stopping process includes: switching a control mode of the converter to make the current of the bypass switch approaches zero when closed the bypass switch, then controlling a current of the series transformer to be gradually reduced to zero to make the series transformer out of service, and blocking the converter.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 29, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Lei Pan, Jie Tian, Quanrong Shen, Xinbao Wang, Yu Lu, Yunlong Dong, Baoli Chang
  • Publication number: 20190326770
    Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.
    Type: Application
    Filed: January 12, 2018
    Publication date: October 24, 2019
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Jiudong DING, Yu LU, Yunlong DONG, Haiying LI, Jie TIAN, Defeng QIU, Tiangui JIANG, Jianyang LIAN
  • Patent number: 10418816
    Abstract: The present invention discloses a passive islanding to grid-connection switching method for a VSC HVDC transmission system. When the VSC HVDC transmission system in an island operation state, whether the VSC HVDC transmission system enters an grid-connection state is determined by detecting whether an overcurrent phenomenon has occurred in a converter valve-side three-phase alternating-current or a converter bridge arm current, and detecting a change status of an alternating-current side voltage. The system is controlled to switch from an island operation control mode to a grid-connection control mode. At a moment of switching, the online control mode is smoothly switched to by changing a power instruction and performing phase tracking on a current grid voltage, so that continuous operation of the system is maintained.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: September 17, 2019
    Assignees: NR Electric Co., Ltd., NR Engineering Co., Ltd.
    Inventors: Yunlong Dong, Jie Tian, Zhaoqing Hu, Haiying Li, Dongming Cao, Haibin Liu, Yu Lu
  • Patent number: 10396561
    Abstract: The present invention discloses a coordination control method of a multi-terminal VSC-HVDC transmission system. If a direct current voltage master control station shuts down, a direct current voltage control slave station takes over direct current voltage control, and remaining convertor stations keep original control modes. The takeover steps comprise that under the condition that inter-station communications are effective, the master control station sends a shutdown message to the slave station through the inter-station communications, and when the slave station monitors that the direct current voltage master control station shuts down, the slave station switches a current control mode into a direct current voltage control mode; and under the condition that inter-station communications fail or inter-station communications are absent, the slave station monitors changes of the direct current voltage of a system.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: August 27, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Yunlong Dong, Jie Tian, Gang Li, Dongming Cao, Haiying Li, Haibin Liu
  • Publication number: 20190252885
    Abstract: Provided is an on-line input and quit control method for a voltage-source converter unit. The method achieves the on-line input of a voltage-source converter unit by means of performing steps, such as charging control, deblocking transfer control and operation adjustment control, on a voltage-source converter to be input, and achieves the on-line quitting of the voltage-source converter unit by means of performing steps, such as direct-current voltage reduction control, bypass transfer control and converter blocking control, on a voltage-source converter to be quit. Correspondingly, provided is an on-line input and quit control device for a voltage-source converter unit, which can achieve the on-line steady input and quitting of a voltage-source converter in a series-type hybrid direct-current power transmission system or a series-type flexible direct-current power transmission system, without affecting the normal and stable operation of other already running converters.
    Type: Application
    Filed: November 24, 2017
    Publication date: August 15, 2019
    Inventors: Jiang Lu, Yu Lu, Yunlong Dong, Nannan Wang, Yongping Wang, Wenqiang Zhao, Jie Tian, Haiying Li
  • Patent number: 10359621
    Abstract: A frost-prevention film system of a large-aperture reflecting optic infrared telescope used in an extremely low temperature environment and a preparation method thereof is disclosed. The frost-prevention film system has the following structure: a transparent conducting film layer, an intermediate insulation layer, a reflecting film layer and an outermost medium protection layer in sequence from a main telescope mirror surface, wherein both sides of the transparent conducting film layer are provided with conducting electrodes. The steps are as follows: (1) a preparation step; (2) a step of plating a conducting film; (3) a step of plating an intermediate insulation layer; (4) a step of plating a reflecting film layer; (5) a step of plating an outermost medium protection layer; and (6) a step of plating conducting electrodes.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: July 23, 2019
    Assignee: NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCIENCE
    Inventors: Jinfeng Wang, Yeru Wang, Jie Tian, Xinnan Li
  • Publication number: 20190173392
    Abstract: A reconfigurable MMC sub-module unit and a control unit thereof are provided, the reconfigurable MMC sub-module unit is mainly formed by an MMC sub-module unit and a reconfigurable mechanism, wherein the reconfigurable mechanism is formed by switches, and the conversion of MMC sub-module unit topology is achieved through switching on and off the switches in the reconfigurable mechanism. According to the reconfigurable MMC sub-module unit and the control unit thereof, the rapid change of a topology structure for a converter can be achieved, which is suitable for the demand of the line connection of the medium-voltage power distribution network and variable topologies, and meets requirements of dynamic simulation experiment for different converter topologies in the dynamic simulation experiment, thereby reducing construction costs and duration, improving experiment efficiency, and having high flexibility and strong versatility.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 6, 2019
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Gang LI, Jianchun LI, Jie TIAN, Haiying LI, Yu LU, Yunlong DONG, Zhaoqing HU, Minglian ZHU
  • Patent number: 10303369
    Abstract: Various embodiments for managing data by a processor in a multi-tiered computing storage environment. Based on Input/Output (I/O) statistics, a ranking mechanism is applied to differentiate data between at least a cache rank and a Solid State Drive (SSD) rank. The ranking mechanism migrates data between the cache rank and SSD rank such that storage space in the cache rank is reserved for those of the plurality of data workload types having a greater adverse effect on a storage performance characteristic if stored in the SSD rank than if those workload types were stored in the cache rank.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: May 28, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Yong Guo, Bruce McNutt, Jie Tian, Yan Xu
  • Publication number: 20190140441
    Abstract: A method for fault positioning and recovery of a voltage source converter includes following steps. Locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage. Positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter. Recovering operation of each station after the fault is positioned. The method for fault positioning and recovery is simple, practical, has high reliability, and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to transmission of the zero sequence voltage of the alternating-current side to an opposite-side alternating-current system via a voltage source converter.
    Type: Application
    Filed: April 25, 2017
    Publication date: May 9, 2019
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Gang LI, Yu LU, Zhaoqing HU, Jie TIAN, Yunlong DONG, Tiangui JIANG, Haiying LI, Yadong FENG, Ke WANG, Jiang LU, Shunke SUI, Hui WANG, Nannan WANG
  • Patent number: 10283965
    Abstract: A method for incorporating a non-operating station into an operating system in a multi-terminal flexible DC transmission system. The method includes selecting a STATCOM operation mode for the non-operating station; opening a bypass switch at an AC side and connecting a charging resistor to an AC line; closing the AC incoming-line breaker, and pre-charging a converter valve of the non-operating station through the resistor; closing the bypass switch after the pre-charging; selecting a constant-DC voltage control mode for the non-operating station to perform deblocking; controlling the difference between a non-operating station DC voltage value and an operating system direct voltage value to be within an allowable range; closing the pole-connection device at the DC side of a converter of the non-operating station; and switching the non-operating station from the STATCOM operation mode to a DC operation mode, and incorporating the non-operating station into the operating system.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: May 7, 2019
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Yunlong Dong, Gang Li, Jie Tian, Nannan Wang, Chao Liu