Patents by Inventor Boming Zhang

Boming Zhang 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: 20220302706
    Abstract: The disclosure relates to a two-side stochastic dispatching method for a power grid. By analyzing historical data of wind power, the Gaussian mixture distribution is fitted by software. For certain power system parameters, a two-side chance-constrained stochastic dispatching model is established. The hyperbolic tangent function is used to analyze and approximate cumulative distribution functions of random variables in the reserve demand constraint and the power flow constraint, to convert the two-side chance constraint into a deterministic constraint. The disclosure can have the advantage of using the hyperbolic tangent function to convert the two-side chance constraint containing risk levels and random variables into the solvable deterministic convex constraint, effectively improving the solution efficiency of the model, and providing decision makers with a more reasonable dispatching basis.
    Type: Application
    Filed: July 23, 2021
    Publication date: September 22, 2022
    Inventors: Wenchuan WU, Shuwei XU, Boming ZHANG, Hongbin SUN, Bin WANG, Qinglai GUO
  • Patent number: 11435265
    Abstract: A method for estimating a state of a combined heat and power system is provided. The method include: establishing an objective function; establishing constraints under a steady-state operating stage; converting the objective function and the constraints by utilizing a Lagrangian multiplier to obtain a Lagrange function; obtaining a steady-state estimation result of the combined heat and power system based on the Lagrange function; calculating an energy transmission delay produced by each pipe; establishing a dynamic constraint of each pipe based on the steady-state estimation result and the energy transmission delay; converting the objective function, the constraints, and the dynamic constraint by utilizing the Lagrangian multiplier to update the Lagrange function; obtaining a dynamic-state estimation result of the combined heat and power system during a dynamic-state operating stage of the combined heat and power system based on the updated Lagrange function.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: September 6, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Hongbin Sun, Qinglai Guo, Bin Wang, Tongtian Sheng, Boming Zhang, Wenchuan Wu, Mingye Zhang
  • Publication number: 20220244692
    Abstract: A planning method for a power distribution automation system based on a reliability constraint is provided. The method includes: defining installation states of components and principles of a fault isolation, a load transfer and a fault recovery after a branch fault occurs; establishing a reliability evaluation optimization model for a power distribution network based on a mixed integer linear programming, the reliability evaluation optimization model comprising a target function and constraint conditions; solving the reliability evaluation optimization model to obtain an optimum planning scheme; and planning the power distribution automation system based on the optimum planning scheme.
    Type: Application
    Filed: April 19, 2022
    Publication date: August 4, 2022
    Inventors: Wenchuan WU, Boming ZHANG, Zihao LI, Hongbin SUN, Bin WANG, Qinglai GUO
  • Publication number: 20220114507
    Abstract: The present disclosure provides a method for optimizing transformation of automation equipment in a power distribution network based on reliability, including determining installation states of respective components in the power distribution network and operation criterions for fault isolation, load transfer and fault recovery after a fault occurred in a feeder segment; determining a target function which is a target function for minimizing a total transformation cost of the power distribution network; determining constraint conditions including reliability constraints; establishing an optimization model for evaluating the reliability of the power distribution network based on the reliability constraints in accordance with the target function and the constraints; and solving the established optimization model for evaluating the reliability of the power distribution network based on the reliability constraints to obtain optimal solutions as optimization results of the automation transformation state of the cir
    Type: Application
    Filed: December 19, 2021
    Publication date: April 14, 2022
    Inventors: Wenchuan WU, Boming ZHANG, Zihao LI, Hongbin SUN, Bin WANG, Qinglai GUO
  • Publication number: 20220037883
    Abstract: The disclosure provides power distribution network reliability index calculation method based on mixed integer linear programming. The method includes: establishing a model for optimizing reliability indexes of a power distribution network based on a mixed integer linear programming model, wherein the model comprises an objective function and constraint conditions, the objective function is for minimizing a system average interruption duration index (SAIDI); solving the model based on the objective function and the constraint conditions to obtain reliability indexes of the power distribution network; and controlling operation of the power distribution network based on the reliability indexes.
    Type: Application
    Filed: October 13, 2021
    Publication date: February 3, 2022
    Inventors: Wenchuan WU, Boming ZHANG, Zihao LI, Hongbin SUN, Bin WANG, Qinglai GUO
  • Patent number: 11239658
    Abstract: The present disclosure provides a dispatching method and a dispatching device for an integrated transmission and distribution network. The integrated transmission and distribution network include a transmission network and at least one distribution network. The method includes: establishing a dispatch model of the integrated transmission and distribution network; solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network, in which the dynamic dispatch parameters comprise a boundary transferred power from the transmission network to each of the at least one distribution network, and power outputs of all generators in the transmission network and each of the at least one distribution network; and dispatching the integrated transmission and distribution network based on the boundary transferred power and the power outputs of all the generators in the transmission network and each of the at least one distribution network.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: February 1, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Bin Wang, Chenhui Lin, Boming Zhang, Hongbin Sun, Qinglai Guo
  • Patent number: 11204590
    Abstract: A state estimation method for a heat supply network in a steady state based on a bilateral equivalent model is provided. The method includes: establishing the bilateral equivalent model based on a mass flow rate in each supply branch of the heating network, a mass flow rate in each return branch of the heating network, a mass flow rate in each connecting branch of the heating network, a pressure and a temperature of each node in the heating network, wherein each heat source is configured as a connecting branch and each heat load is configured as a connecting branch; and repeatedly performing a state estimation on the heating network based on the bilateral equivalent model, until a coverage state estimation result is acquired.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: December 21, 2021
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Hongbin Sun, Qinglai Guo, Bin Wang, Tongtian Sheng, Boming Zhang, Wenchuan Wu, Mingye Zhang, Jinni Dong
  • Publication number: 20210334429
    Abstract: The present disclosure provides a method for planning a distribution network with reliability constraints based on a feeder corridor, including determining installation states of respective elements in the distribution network; determining an objective function, the objective function being an objective function of minimizing a total investment cost of the distribution network; obtaining fault-isolation-and-load-transfer time and fault recovery time in a case where the feeder segment of each feeder line that is contained in each feeder corridor fails; determining constraint conditions including reliability constraints; building a distribution network planning model according to the objective function and the constraints; and solving the distribution network planning model built to obtain optimal solutions as planning states and reliability indexes to plan the distribution network.
    Type: Application
    Filed: July 2, 2021
    Publication date: October 28, 2021
    Inventors: Wenchuan WU, Boming ZHANG, Zihao LI, Hongbin SUN, Bin WANG, Qinglai GUO
  • Publication number: 20210117586
    Abstract: The disclosure provides a method for planning a power distribution network, an apparatus for planning a power distribution network, and a storage medium. The method includes: establishing a model for planning the power distribution network, the model including a target function and constraints, the target function for minimizing a cost of the power distribution network when branches, and nodes are installed into the power distribution network, the nodes including transformers and substations, the constraints including a power balance constraint of the power distribution network, a power constraint of the branches, a power constraint of the transformers, a radial operation constraint of the power distribution network, a fault constraint, a calculation constraint of indices of a reliability, a constraint of the indices of the reliability, and a logic constraint; and solving the model to determine whether the branches and the nodes are installed into the power distribution network.
    Type: Application
    Filed: December 29, 2020
    Publication date: April 22, 2021
    Inventors: Wenchuan WU, Boming ZHANG, Zihao LI, Hongbin SUN, Bin WANG, Qinglai GUO
  • Publication number: 20200410145
    Abstract: A method for calculating a voltage stability margin of a power system considering electric-gas system coupling is provided. The method includes: establishing constraint equations for stable and secure operation of an electric-gas coupling system; establishing a continuous energy flow model of the electric-gas coupling system using a load margin index ? based on a correlation between an electric load of the power system and a natural gas load of the natural gas system; setting inequality constraints for the stable and secure operation of the electric-gas coupling system based on the limits of pressure and gas supply amount of the natural gas system; and solving the energy flow equation established based on the constraints and the continuous energy flow model to obtain the voltage stability margin of the power system considering electric-gas system coupling.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Inventors: Hongbin SUN, Qinglai GUO, Bin WANG, Zheng QIAO, Boming ZHANG, Wenchuan WU, Mingye ZHANG
  • Patent number: 10782660
    Abstract: The present disclosure provides a method and a device for solving an optimal power flow in a power supply system. A second convex model of the optimal power flow is established. A relaxation variant sum e according to the second convex model is determined. It is judged whether the relaxation variant sum e is greater than a preset threshold. If the relaxation variant sum e is greater than the preset threshold, the second convex model of the optimal power flow is established. If the relaxation variant sum e is not greater than the preset threshold, the solution of the second convex optimal model is determined as a feasible solution of the optimal model of the optimal power flow.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 22, 2020
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun
  • Publication number: 20200233387
    Abstract: A state estimation method for a heat supply network in a steady state based on a bilateral equivalent model is provided. The method includes: establishing the bilateral equivalent model based on a mass flow rate in each supply branch of the heating network, a mass flow rate in each return branch of the heating network, a mass flow rate in each connecting branch of the heating network, a pressure and a temperature of each node in the heating network, wherein each heat source is configured as a connecting branch and each heat load is configured as a connecting branch; and repeatedly performing a state estimation on the heating network based on the bilateral equivalent model, until a coverage state estimation result is acquired.
    Type: Application
    Filed: April 9, 2020
    Publication date: July 23, 2020
    Inventors: Hongbin SUN, Qinglai GUO, Bin WANG, Tongtian SHENG, Boming ZHANG, Wenchuan WU, Mingye ZHANG, Jinni DONG
  • Publication number: 20200232886
    Abstract: A method for estimating a state of a combined heat and power system is provided. The method include: establishing an objective function; establishing constraints under a steady-state operating stage; converting the objective function and the constraints by utilizing a Lagrangian multiplier to obtain a Lagrange function; obtaining a steady-state estimation result of the combined heat and power system based on the Lagrange function; calculating an energy transmission delay produced by each pipe; establishing a dynamic constraint of each pipe based on the steady-state estimation result and the energy transmission delay; converting the objective function, the constraints, and the dynamic constraint by utilizing the Lagrangian multiplier to update the Lagrange function; obtaining a dynamic-state estimation result of the combined heat and power system during a dynamic-state operating stage of the combined heat and power system based on the updated Lagrange function.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Inventors: Hongbin SUN, Qinglai GUO, Bin WANG, Tongtian SHENG, Boming ZHANG, Wenchuan WU, Mingye ZHANG
  • Patent number: 10673237
    Abstract: A reactive power optimization method for integrated transmission and distribution networks related to a field of operation and control technology of an electric power system is provided. The reactive power optimization method includes: establishing a reactive power optimization model for a transmission and distribution network consisting of a transmission network and a plurality of distribution networks, in which the reactive power optimization model includes an objective function and a plurality of constraints; performing a second order cone relaxation on a non-convex constraint of a plurality of distribution network constraints of the plurality of constraints; and solving the reactive power optimization model by using a generalized Benders decomposition method so as to control each generator in the transmission network and each generator in the plurality of distribution networks.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: June 2, 2020
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun, Chenhui Lin, Bin Wang, Qinglai Guo
  • Publication number: 20200144819
    Abstract: The present disclosure provides a dispatching method and a dispatching device for an integrated transmission and distribution network. The integrated transmission and distribution network include a transmission network and at least one distribution network. The method includes: establishing a dispatch model of the integrated transmission and distribution network; solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network, in which the dynamic dispatch parameters comprise a boundary transferred power from the transmission network to each of the at least one distribution network, and power outputs of all generators in the transmission network and each of the at least one distribution network; and dispatching the integrated transmission and distribution network based on the boundary transferred power and the power outputs of all the generators in the transmission network and each of the at least one distribution network.
    Type: Application
    Filed: January 7, 2020
    Publication date: May 7, 2020
    Inventors: Wenchuan WU, Bin WANG, Chenhui LIN, Boming ZHANG, Hongbin SUN, Qinglai GUO
  • Patent number: 10620594
    Abstract: The present disclosure provides a dispatch method and apparatus for controlling a combined heat and power CHP system. The CHP system includes CHP units, non-CHP thermal units, wind farms and heating boilers; the CHP units, the non-CHP thermal units and the wind farms form an electric power system EPS of the CHP system; the CHP units and the heating boilers form a central heating system CHS of the CHP system; and the EPS and the CHS are isolable. The method includes: establishing a combined heat and power dispatch CHPD model, an objective function being a minimizing function of a total generation cost of the CHP units, the non-CHP thermal units, the wind farms and the heating boilers; solving the CHPD model based on Benders decomposition to obtain dispatch parameters for the EPS and the CHS; and controlling the EPS and the CHS according to the corresponding dispatch parameters respectively.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: April 14, 2020
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun, Chenhui Lin, Qinglai Guo, Bin Wang
  • Patent number: 10359750
    Abstract: The present disclosure provides a frequency control method for a micro-grid and a control device. The method includes: determining a middle parameter at iteration k; determining a local gradient parameter at iteration k according to the cost increment rate at iteration k, the frequency difference between iterations k and k+1, and communication coefficients; performing a quasi-Newton recursion according to the middle parameter and local gradient parameter to acquire a recursion value; determining the cost increment rate at iteration k+1 according to the recursion value; determining an adjustment value of an active power according to the cost increment rate at iteration k+1; adjusting the active power according to the adjustment value if the adjustment value satisfies a constraint condition and judging whether the difference is smaller than a predetermined threshold; executing k=k+1 if yes and stopping the frequency control if no.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: July 23, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun, Zhongguan Wang, Qinglai Guo, Bin Wang
  • Patent number: 10361561
    Abstract: The present disclosure provides a dispatching method and a dispatching device for an integrated transmission and distribution network. The integrated transmission and distribution network includes a transmission network and at least one distribution network. The method includes: establishing a dispatch model of the integrated transmission and distribution network, in which dispatch model includes an objective function and constraints, the objective function is a minimizing function of a total generation cost of the transmission network and the at least one distribution network under the constraints; solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network; and dispatching the integrated transmission and distribution network according to the dynamic dispatch parameters.
    Type: Grant
    Filed: November 5, 2017
    Date of Patent: July 23, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun, Chenhui Lin, Qinglai Guo, Bin Wang
  • Patent number: 10291027
    Abstract: The present disclosure provides a method and a device for controlling an active distribution network, relating to the field of power system operation and control technology.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 14, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Hongbin Sun, Zhuang Tian, Qinglai Guo, Bin Wang
  • Patent number: 10277033
    Abstract: The present disclosure provides a method and a device for controlling a distributed generator in a distribution system. The method includes: extracting a first statistic feature of a load at each bus; extracting a second statistic feature of a distributed generator at each bus; establishing a probability distribution set of each first and second statistic feature; determining security constraints of the distribution system; obtaining a bilinear matrix inequality constraint by using a C-VaR approximation algorithm and a duality algorithm based on the probability distribution set and on the security constraints; determining an objective function to maximize a total installed capacity of the distributed generators; solving the objective function according to the bilinear matrix inequality constraint to obtain an installed capacity of each distributed generator; and controlling an access of each distributed generator according to the installed capacity.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: April 30, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Boming Zhang, Xin Chen, Hongbin Sun, Qinglai Guo, Bin Wang