公开(公告)号：US20150088470A1

公开(公告)日：2015-03-26

申请号：US14143474

申请日：2013-12-30

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Hongbin Sun ,  Zhigang Li ,  Qinglai Guo

IPC: G06F17/50

CPC classification number: G06Q50/06 ,  G06F17/11

Abstract: A method and a device for identifying a feasibility of a transmission interface constraint in an online rolling dispatching are provided. The method comprises: S1, establishing an online rolling dispatching model including a transmission interface constraint; S2, establishing a Lagrangian relaxation dual problem of the online rolling dispatching model; and S3, identifying a feasibility of the transmission interface constraint by solving the Lagrangian relaxation dual proble

Abstract translation: 提供了一种用于在线滚动调度中识别传输接口约束的可行性的方法和装置。 该方法包括：S1，建立包含传输接口约束的在线滚动调度模型; S2，建立了在线滚动调度模型的拉格朗日松弛双重问题; 和S3，通过解决拉格朗日松弛双重问题来识别传输接口约束的可行性

公开(公告)号：US20140172298A1

公开(公告)日：2014-06-19

申请号：US14109431

申请日：2013-12-17

Applicant: Tsinghua University

Inventor： Qinglai Guo ,  Hongbin Sun ,  Boming Zhang ,  Wenchuan Wu ,  Shujun Xin ,  Zhengshuo Li

IPC: G01C21/34

CPC classification number: G01C21/3469 ,  B60L11/1824 ,  B60L11/1838 ,  B60L11/1861 ,  B60L2240/622 ,  B60L2240/68 ,  B60L2240/70 ,  B60L2240/72 ,  B60L2240/80 ,  B60L2260/52 ,  B60L2260/54 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705 ,  Y02T10/7072 ,  Y02T10/7291 ,  Y02T90/121 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/16 ,  Y02T90/161 ,  Y02T90/162 ,  Y02T90/163

Abstract: A method and a device for navigating an electric vehicle in charging are provided. The method comprises: S1, obtaining a navigation area, wherein the navigation area comprises a plurality of charging stations; S2, receiving a charging request from an electric vehicle in the navigation area; S3, obtaining a plurality of first time periods according to the electric vehicle and the plurality of charging stations; S4, selecting a minimum first time period from the plurality of first time periods; and S5, navigating the electric vehicle to a charging station corresponding to the minimum first time period.

Abstract translation: 提供了一种用于在充电中导航电动车辆的方法和装置。 该方法包括：S1，获得导航区域，其中导航区域包括多个充电站; S2，在导航区域中接收来自电动车辆的收费请求; S3，根据电动车辆和多个充电站获得多个第一时间段; S4，从多个第一时间段中选择最小的第一时间段; 和S5，将电动车辆导航到对应于最小第一时间段的充电站。

公开(公告)号：US12136816B2

公开(公告)日：2024-11-05

申请号：US17748535

申请日：2022-05-19

Applicant: DEPARTMENT OF ELECTRICAL ENGINEERING, TSINGHUA UNIVERSITY ,  STATE GRID JIBEI ELECTRIC POWER COMPANY LIMITED

Inventor： Bin Wang ,  Guannan Wang ,  Wenchuan Wu ,  Haitao Liu ,  Hongbin Sun ,  Jun Zhang ,  Qinglai Guo ,  Qi Wang ,  Ziang Liu

IPC: G05B19/042 ,  H02J3/18 ,  H02J3/38

Abstract: An online voltage control method for coordinating multi-type reactive power resources is provided. First, a linearized power flow equation of branch reactive power is established, and an online voltage control model of multi-type reactive power resources including an objective function and constraint conditions is constructed. The constraint conditions includes generator reactive power constraints, reactive power compensator constraints, transformer tap position constraints, a nodal reactive power balance constraint, and slack contained nodal voltage constraints. Then, an optimization result of voltage control is obtained by solving the model. The method makes full use of reactive voltage operation characteristics of a power grid, constructs a practical online solution model for reactive voltage control of large power grid of coordinating multiple reactive power resources, and under a condition of acceptable accuracy loss, takes in account safety of power grid operation, economy of reactive power resource actions and high reliability of online operation.

公开(公告)号：US12015271B2

公开(公告)日：2024-06-18

申请号：US17500539

申请日：2021-10-13

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Zihao Li ,  Hongbin Sun ,  Bin Wang ,  Qinglai Guo

IPC: H02J3/00 ,  G05B17/02 ,  G06F17/12

CPC classification number: H02J3/001 ,  G05B17/02 ,  G06F17/12 ,  H02J2203/20

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.

公开(公告)号：US11973803B2

公开(公告)日：2024-04-30

申请号：US17328321

申请日：2021-05-24

Applicant: Tsinghua University

Inventor： Qinglai Guo ,  Hongbin Sun ,  Luo Xu ,  Wenchuan Wu

IPC: H04L9/40

CPC classification number: H04L63/20 ,  H04L63/1416 ,  H04L63/168

Abstract: The present disclosure provides a stability criterion for time-delay of cyber-physical power systems under distributed control, which relates to a field of cyber-physical power systems technologies. The method first establishes an cyber side model of the cyber-physical power systems under distributed control and a physical power grid model of the cyber-physical power systems under distributed control respectively; then establishes simultaneous equations of the cyber side model and the physical power grid model to establish an unified differential algebraic equation model of the cyber-physical power systems under distributed control, so as to obtain a time-delay characteristic equation expression of the cyber-physical power systems under distributed control; determines a time-delay of each node, and solving the time-delay characteristic equation expression to obtain a maximum characteristic root, and performing the stability criterion for the time-delay of the cyber-physical power systems under distributed control according to a real part of the maximum characteristic root.

公开(公告)号：US11923685B2

公开(公告)日：2024-03-05

申请号：US17347036

申请日：2021-06-14

Applicant: TSINGHUA UNIVERSITY ,  STATE GRID JIBEI ELECTRIC POWER COMPANY

Inventor： Bin Wang ,  Yanling Du ,  Wenchuan Wu ,  Haitao Liu ,  Hongbin Sun ,  Guannan Wang ,  Qinglai Guo ,  Qi Wang ,  Chenhui Lin

IPC: H02J3/18 ,  G01R19/25 ,  G06F119/06 ,  H02J3/00 ,  H02J3/06

CPC classification number: H02J3/1814 ,  G01R19/2513 ,  H02J3/001 ,  H02J3/06 ,  G06F2119/06

Abstract: A reactive power-voltage control method for integrated transmission and distribution networks is provided. The reactive power-voltage control method includes: establishing a reactive power-voltage control model for a power system consisting of a transmission network and a plurality of distribution networks; performing a second order cone relaxation on a non-convex constraint of the plurality of distribution network constraints to obtain the convex-relaxed reactive power-voltage control model; solving the convex-relaxed reactive power-voltage control model to acquire control variables of the transmission network and control variables of each distribution network; and controlling the transmission network based on the control variables of the transmission network and controlling each distribution network based on the control variables of the distribution network, so as to realize coordinated control of the power system.

公开(公告)号：US11435265B2

公开(公告)日：2022-09-06

申请号：US16841481

申请日：2020-04-06

Applicant: Tsinghua University

Inventor： Hongbin Sun ,  Qinglai Guo ,  Bin Wang ,  Tongtian Sheng ,  Boming Zhang ,  Wenchuan Wu ,  Mingye Zhang

IPC: G01M99/00 ,  G06F1/28 ,  G06F17/13

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.

公开(公告)号：US11306923B2

公开(公告)日：2022-04-19

申请号：US16842566

申请日：2020-04-07

Applicant: Tsinghua University

Inventor： Hongbin Sun ,  Qinglai Guo ,  Bin Wang ,  Yuwei Chen

IPC: F24D19/10 ,  G05B17/02 ,  G06Q10/06 ,  G06Q50/06 ,  H02J3/00

Abstract: An intra-day rolling scheduling method for an integrated heat and electricity system including: establishing an objective function for scheduling of the integrated heat and electricity system, the objective function aiming to make operating costs of the integrated heat and electricity system to be a minimum; establishing constraints for a steady-state safe operation of the integrated heat and electricity system; and solving the objective function based on the constraints by an interior point method, to obtain an active power and a heating power of each combined heat and power unit, an active power of each thermal power unit, a heating power of each heat pump, and an active power consumed by each circulating pump.

公开(公告)号：US10673237B2

公开(公告)日：2020-06-02

申请号：US15638648

申请日：2017-06-30

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Hongbin Sun ,  Chenhui Lin ,  Bin Wang ,  Qinglai Guo

IPC: H02J3/20 ,  H02J3/18 ,  G06F17/11 ,  H02J3/00

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.

公开(公告)号：US10359750B2

公开(公告)日：2019-07-23

申请号：US15375246

申请日：2016-12-12

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Hongbin Sun ,  Zhongguan Wang ,  Qinglai Guo ,  Bin Wang

IPC: G05B19/042 ,  H02J3/00 ,  H02J3/38

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.