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: 20170331297
    Abstract: The present invention provides a method for inhibiting multiple inverter stations from entering a passive control mode in an island state. The method includes dividing inverter stations into groups in advance; a principle for group division is dividing inverter stations whose alternating-current sides are connected to each other through an alternating-current line in a normal running condition into a group; priorities of the inverter stations are preset in each group to tune relevant fixed values of the inverter stations for island detection; a tuning principle is that an inverter station with a higher priority has a more sensitive relevant fixed value, and an island state is more easily detected for the corresponding inverter station; an inverter station for which an island state is detected can enter a passive control mode only when all the other inverter stations with priorities higher than the priority of the inverter station in the group send enabling signals.
    Type: Application
    Filed: November 24, 2015
    Publication date: November 16, 2017
    Applicant: NR ELECTRIC CO., LTD.
    Inventors: Yunlong Dong, Jie Tian, Dongming Cao, Haiying Li, Jiudong Ding, Zhaoqing Hu, Gang Li, Haibin Liu, Yu Lu
  • Publication number: 20170317574
    Abstract: A submodule distributed control method, device and system are provided. Submodules of each bridge arm are grouped. Each group corresponds to one valve based controller. An upper-level control device calculates a weight of each group according to a bridge arm current, an average voltage of normal submodules in each group, and the number of the normal submodules in each group; calculates, according to the number of submodules to be input in a corresponding bridge arm, the number of submodules being input in each group and delivers the number to the valve based controller. The valve based controller operates according to a voltage balancing policy and a gating method that are provided in the prior art.
    Type: Application
    Filed: October 28, 2015
    Publication date: November 2, 2017
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Jiudong DING, Jie TIAN, Yunlong DONG, Haiying LI, Dongming CAO, Haibin LIU, Yu LU
  • Publication number: 20170229865
    Abstract: A starting and stopping method for a static synchronous series compensator (SSSC) is provided.
    Type: Application
    Filed: August 4, 2015
    Publication date: August 10, 2017
    Applicants: 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: 20170207630
    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: Application
    Filed: April 18, 2014
    Publication date: July 20, 2017
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Yunlong DONG, Gang LI, Jie TIAN, Nannan WANG, Chao LIU
  • Publication number: 20170199502
    Abstract: A line power control method and system for a unified power flow controller includes outer loop line power control, inner loop valve side current control, and converter valve control. Series-side converter valve side current reference values Isedref and Iseqref are calculated by means of the outer loop line power control according to line power instructions Pref and Qref that are input, a measured line power UL, and measured line power Pline and Qline; a converter output voltage reference value Ucref is calculated by means of the inner valve side current control according to the valve side current reference values that are output by means of the outer loop power control, a measured valve side current, and a measured valve side voltage; and finally, a converter outputs, according to the voltage reference value, a corresponding voltage to control line power to achieve a reference value.
    Type: Application
    Filed: January 22, 2015
    Publication date: July 13, 2017
    Inventors: Jie Tian, Lei Pan, Chao Liu, Quanrong Shen, Haiying Li, Yu Lu, Yunlong Dong
  • Publication number: 20170196289
    Abstract: A light-emitting helmet is provided. The helmet includes a main body, a number of fixing members, and a number of light-emitting lamp strips. The main body includes a shell and inner layer. The shell includes an outer surface and a number of grooves defining in the outer surface. The fixing members are secured in the inner layer. The lamp strips are detachably mounted in the grooves by the fixing frames respectively. In addition, a light-emitting helmet manufacturing method is also provided.
    Type: Application
    Filed: December 26, 2016
    Publication date: July 13, 2017
    Inventors: BO ZHENG, YONG-ZHENG YE, JIE TIAN, ZHI-MING LI, XIANG-LING YI
  • Publication number: 20170161921
    Abstract: The invention discloses a wearable molecular imaging navigation system comprising: a multi-spectral light transceiver configured to transmit a multi-spectral light to a detected subject in a detection region and acquire an emitting light regarding the detected subject and acquire a reflecting light regarding the detected subject; an image processor configured to receive the reflecting light and the emitting light from the multi-spectral light transceiver, execute a three-dimensional reconstruction and fusion process on the reflecting light and the emitting light to obtain a fusion image; a wireless signal processor configured to enable a wireless communication; and a wearable device, configured to receive the fusion image from the image processor via the wireless signal processor, display the fusion image and control the multi-spectral light transceiver and the image processor based on instructions received.
    Type: Application
    Filed: October 10, 2016
    Publication date: June 8, 2017
    Inventors: Jie TIAN, Kunshan HE, Chongwei CHI, Xin YANG
  • Patent number: 9638195
    Abstract: A cross flow fan includes a support plate and an impeller with a plurality of blades disposed on the support plate at predetermined intervals. On each blade, a radius of a pressure surface arc is greater than a radius of a suction surface arc, a radius of an inner peripheral side arc is greater than a radius of an outer peripheral side arc, and a region of maximum thickness is located 40% to 60% from the inner peripheral side arc in the lengthwise direction. The blades are disposed such that the inner peripheral side arcs are positioned on an inner peripheral side of the support plate and the outer peripheral side arcs are positioned on an outer peripheral side of the support plate. A flow path width between the plurality of blades gradually decreases from the inner peripheral side toward the outer peripheral side of the support plate.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: May 2, 2017
    Assignees: SHANGHAI JIAOTONG UNIVERSITY, Daikin Industries, Ltd.
    Inventors: Jie Tian, Hua Ouyang, You Li, Hironobu Teraoka, Shimei Tei, Hideshi Tanaka
  • Publication number: 20170098936
    Abstract: A unified power flow controller for a double-circuit transmission line comprises at least one parallel-connection transformer, three current converters, at least two series-connection transformers, a parallel-connection side switching circuit, a series-connection side switching circuit and a direct current common bus. The series-connection transformers connected with at least one group of by-pass switches in parallel. The three current converters connected to each loop line in series after being connected with at least one series-connection transformer through the series-connection side switching circuit. The three current converters connected to an alternating current system after connected with at least one parallel-connection transformer through a parallel-connection side switching circuit starting circuit. The three current converters are connected to the direct current common bus through a transfer switch.
    Type: Application
    Filed: January 12, 2015
    Publication date: April 6, 2017
    Inventors: Jie Tian, Haiying Li, Xinbao Wang, Yunlong Dong, Quanrong Shen, Lei Pan, Chao Liu, Baoli Chang
  • Patent number: 9608511
    Abstract: A method for charging a modular multilevel converter includes: firstly, electrifying DC side of a converter; after voltages of submodules are stabilized, deblocking the converter, turning on all the submodules, then reducing the number of turned on submodules in phase unit; when over-current occurs on a bridge arm, temporarily increasing the number of turned on submodules to suppress the over-current; after the voltages of the sub-modules are stabilized, continuously reducing the number of the turned on submodules until the number of the turned on submodules in the phase unit is finally equal to the number of working submodules of the bridge arm, so as to smoothly transit to a normal operation state. The DC side is charged, such that the voltages of the submodules reach a working voltage before the converter normally operates, and an impacting current is avoided in the charging process by using a proper control strategy.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: March 28, 2017
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Nannan Wang, Jie Tian, Yunlong Dong, Gang Li, Dongming Cao
  • Publication number: 20170070047
    Abstract: A voltage-source multi-level converter, including a phase unit (0).
    Type: Application
    Filed: February 5, 2015
    Publication date: March 9, 2017
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Guorong SHEN, Jie TIAN, Dongming CAO, Haiying LI, Yunlong DONG, Nannan WANG, Haibin LIU, Yu LU
  • Patent number: 9575659
    Abstract: Aspects of the present disclosure are directed toward a system for managing the migration of extents on tiered systems. The system can include receiving a space reservation request for one or more requested extents on a first storage tier of a storage system. The system can also include releasing a first storage tier reserve space that includes one or more first tier reserved extents in response to the first storage tier reserve space being insufficient for the reservation request. The system can also include migrating the one or more requested extents to the first storage tier reserve space.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 21, 2017
    Assignee: International Business Machines Corporation
    Inventors: Juan A. Coronado, Yong Guo, Beth A. Peterson, Jie Tian
  • Publication number: 20170040885
    Abstract: A method for charging a modular multilevel converter includes: firstly, electrifying DC side of a converter; after voltages of submodules are stabilized, deblocking the converter, turning on all the submodules, then reducing the number of turned on submodules in phase unit; when over-current occurs on a bridge arm, temporarily increasing the number of turned on submodules to suppress the over-current; after the voltages of the sub-modules are stabilized, continuously reducing the number of the turned on submodules until the number of the turned on submodules in the phase unit is finally equal to the number of working submodules of the bridge arm, so as to smoothly transit to a normal operation state. The DC side is charged, such that the voltages of the submodules reach a working voltage before the converter normally operates, and an impacting current is avoided in the charging process by using a proper control strategy.
    Type: Application
    Filed: January 17, 2014
    Publication date: February 9, 2017
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Nannan WANG, Jie TIAN, Yunlong DONG, Gang LI, Dongming CAO
  • Patent number: 9563360
    Abstract: Aspects of the present disclosure are directed toward a computer program product for managing the migration of extents on tiered systems. The computer program product can be configured to receive a space reservation request for one or more requested extents on a first storage tier of a storage system. The computer program product can also be configured to release a first storage tier reserve space that includes one or more first tier reserved extents in response to the first storage tier reserve space being insufficient for the reservation request. The computer program product can also be configured to migrate the one or more requested extents to the first storage tier reserve space.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 7, 2017
    Assignee: International Business Machines Corporation
    Inventors: Juan A. Coronado, Yong Guo, Beth A. Peterson, Jie Tian
  • Publication number: 20160336751
    Abstract: A tripolar VSC-HVDC system and method, include a rectifier and an inverter formed by a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively. The midpoint of upper and lower converter valves of the rectifier and inverter are connected with a pole 3 DC line by a smoothing reactor. Triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the pole 3 periodically, and tripolar DC transmission is realized by modulating current orders of the three poles.
    Type: Application
    Filed: January 22, 2015
    Publication date: November 17, 2016
    Inventors: Ming Hu, Zhenxia Shao, Xinyan Jiao, Jie Tian, Yu Lu, Gang Shen
  • Publication number: 20160308359
    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: Application
    Filed: July 1, 2013
    Publication date: October 20, 2016
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Yunlong DONG, Jie TIAN, Gang LI, Dongming CAO, Haiying LI, Haibin LIU
  • Publication number: 20160226306
    Abstract: The present invention discloses a direct current (DC) voltage control method. The present invention further discloses an apparatus for implementing, the method. With the present invention DC voltage oscillation of a system, which is caused when a DC voltage primary control station stops running, may be reduced.
    Type: Application
    Filed: September 25, 2014
    Publication date: August 4, 2016
    Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Yunlong DONG, Jie TIAN, Haiying LI, Dongming CAO
  • Publication number: 20160196067
    Abstract: Aspects of the present disclosure are directed toward a system for managing the migration of extents on tiered systems. The system can include receiving a space reservation request for one or more requested extents on a first storage tier of a storage system. The system can also include releasing a first storage tier reserve space that includes one or more first tier reserved extents in response to the first storage tier reserve space being insufficient for the reservation request. The system can also include migrating the one or more requested extents to the first storage tier reserve space.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 7, 2016
    Inventors: Juan A. Coronado, Yong Guo, Beth A. Peterson, Jie Tian
  • Publication number: 20160196068
    Abstract: Aspects of the present disclosure are directed toward a computer program product for managing the migration of extents on tiered systems. The computer program product can be configured to receive a space reservation request for one or more requested extents on a first storage tier of a storage system. The computer program product can also be configured to release a first storage tier reserve space that includes one or more first tier reserved extents in response to the first storage tier reserve space being insufficient for the reservation request. The computer program product can also be configured to migrate the one or more requested extents to the first storage tier reserve space.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 7, 2016
    Inventors: Juan A. Coronado, Yong Guo, Beth A. Peterson, Jie Tian
  • Patent number: 9333051
    Abstract: A method for generating digital data sets is provided. The method includes: obtaining a first digital data set representing a first tooth arrangement; providing at least one operator for modifying a digital data set representing a tooth arrangement; providing target data which represents orthodontic treatment requirements; generating a second digital data set representing a second tooth arrangement based on the first digital data set using a state space search method and the at least one operator; determining whether the second tooth arrangement meets the treatment requirements; generating a Nth digital data set representing a Nth tooth arrangement based on a N?1th data set representing a N?1th tooth arrangement using the state space search method and the at least one operator, where N is an integer greater than 2; and determining whether the Nth tooth arrangement meets the treatment requirements.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: May 10, 2016
    Assignee: WUXI EA MEDICAL INSTRUMENTS TECHNOLOGIES LIMITED
    Inventors: Zhongke Li, Jie Tian