公开(公告)号：US11616371B2

公开(公告)日：2023-03-28

申请号：US17328373

申请日：2021-05-24

Applicant: TSINGHUA UNIVERSITY ,  STATE GRID FUJIAN ELECTRIC POWER RESEARCH INSTITUTE

Inventor： Qinglai Guo ,  Hongbin Sun ,  Nianfeng Tian ,  Wenchuan Wu ,  Bin Chen ,  Jianye Huang

IPC: H02J3/46 ,  G06Q50/06 ,  H02J3/38

Abstract: The disclosure provides a method for calculating a parameter changing domain of loads under a case that guarantees a constant locational marginal price in an electricity market, which relates to the electricity market field of the power system. With the method in the disclosure, the clearing model on the locational marginal price in the general form is established, and the safe changing domain of the locational marginal price with respect to the loads may be derived and calculated based on the first-order KKT condition expansion of the clearing model on the locational marginal price in the general form. When the increment of the nodal loads is subordinate to the changing domain, the locational marginal price may remain unchanged. The parameter changing domain of loads in the power system may be used for the comprehensive evaluation of power market clearing results and assisting the operation of the power market.

公开(公告)号：US11342753B2

公开(公告)日：2022-05-24

申请号：US17029888

申请日：2020-09-23

Applicant: TSINGHUA UNIVERSITY ,  STATE GRID JIBEI ELECTRIC POWER COMPANY ,  STATE GRID CORPORATION OF CHINA

Inventor： Bin Wang ,  Yanling Du ,  Wenchuan Wu ,  Haitao Liu ,  Hongbin Sun ,  Weimin Sun ,  Zongda Mu ,  Chenhui Lin ,  Qinglai Guo

IPC: G05B19/042 ,  H02J3/36 ,  H02J3/46 ,  H02J3/28

Abstract: The present disclosure provides a scheduling method for a power system based on flexible HVDC (high-voltage direct current) and a pumped storage power station, which belongs to a field of power system control technologies. The method is applicable in a power system having a flexible HVDC system and a pumped storage power station. By establishing a scheduling model for the power system, which contains an objective function and multiple constraints, and solving the scheduling model, a capability of the pumped storage power station is used to adjust the unstable output of the renewable energy power generator and stabilize fluctuant of the renewable energy power generation, such that a power incoming into a load center presents a stable ladder pattern and an optimal scheduling scheme can be obtained.

公开(公告)号：US10277033B2

公开(公告)日：2019-04-30

申请号：US15446097

申请日：2017-03-01

Applicant: Tsinghua University

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

IPC: G05B15/02 ,  H02J3/38 ,  H02J3/46 ,  H02J3/00

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. The method may take full use of statistic features and has higher practicability.

公开(公告)号：US10241532B2

公开(公告)日：2019-03-26

申请号：US14850657

申请日：2015-09-10

Applicant: Tsinghua University

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

IPC: G05F1/625 ,  G05F1/66

Abstract: The present disclosure relates to a partition method and a partition device for a power system and belongs to a field of an evaluation and control of a power system. The method includes steps of: obtaining a quasi-steady sensitivity matrix according to generators participating in automatic voltage control and load buses in the power system; obtaining a power system model according to the quasi-steady sensitivity matrix and the load buses; determining principal component vectors and principal component singular values according to the power system model; determining a principal component vector dominated by each generator according to the principal component vectors and the principal component singular values; and partitioning the generators dominating a same principal component vector to a partition, and partitioning the load buses according to a partition result for the generators.

公开(公告)号：US10146193B2

公开(公告)日：2018-12-04

申请号：US15609510

申请日：2017-05-31

Applicant: Tsinghua University

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

IPC: F24F11/00 ,  G05B13/04 ,  G05D23/19 ,  G05F1/66 ,  F24F11/30 ,  F24F11/62 ,  F24F11/54 ,  H02J3/14 ,  F24F110/00 ,  F24F140/50

Abstract: The present disclosure relates to a method for primary frequency regulation of an electric network based on large building air conditioning loads cluster. The method includes the use of a two layer control structure with a central coordinating layer and a local control layer. Each local controller performs a thermal model parameter identification and a local air conditioning autonomous control, and uploads local information to the central controller at the end of each communication interval tgap, the central controller broadcasts coordinating information to each local controller. Based on the coordinating information sent from the central controller, each local controller determines whether a power deviation is beyond an action dead zone at the beginning of each action period tact, if beyond, then perform a frequency regulation control action, else, perform no action and estimate operation states of all the air conditionings at the beginning of the next action period.

公开(公告)号：US10079490B2

公开(公告)日：2018-09-18

申请号：US14835144

申请日：2015-08-25

Applicant: Tsinghua University

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

IPC: H02J3/12 ,  H02J3/38 ,  H02J3/18

CPC classification number: H02J3/12 ,  H02J3/18 ,  H02J3/386 ,  Y02E10/763 ,  Y02E40/30

Abstract: Disclosed are a method and a device for determining safe threshold for power grid voltage of a wind farm converging area, The method includes: obtaining ground state voltage; obtaining upper and lower limit voltage of the output bus, first lower and upper limit of reactive powers of fans and compensation devices, and lower and upper limit of active power fluctuations; obtaining second lower and upper limit of reactive powers of fans and compensation devices; determining whether voltage error is greater than a predetermined threshold; replacing the first lower and upper limit of the reactive powers of fans and the reactive powers of compensation devices with the second lower and upper limit of reactive powers of fans and compensation devices respectively, and repeating above steps if the voltage error is greater than the predetermined threshold, else defining the upper and lower limit voltage of the output bus as a safe threshold.

公开(公告)号：US09721313B2

公开(公告)日：2017-08-01

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: G06F17/10 ,  G06Q50/06 ,  G06F17/11

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 problem.

公开(公告)号：US20140046493A1

公开(公告)日：2014-02-13

申请号：US13914270

申请日：2013-06-10

Applicant: Tsinghua University

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

IPC: G05B15/02

CPC classification number: G05B15/02 ,  G06F2217/78 ,  H02J3/005 ,  H02J3/06 ,  H02J3/12 ,  H02J2003/001 ,  H02J2003/007 ,  Y02E40/76 ,  Y02E60/76 ,  Y04S10/525 ,  Y04S10/545 ,  Y04S40/22

Abstract: A static security constrained automatic voltage control method is provided, which includes: performing a single automatic voltage control calculation for a control snapshot of a power system in each control cycle. The single automatic voltage control calculation comprises: obtaining a single-time severe contingency sequencing table and a periodical severe contingency sequencing table from a historical severe contingency information database, and selecting severe contingencies; performing a contingency assessment for the active contingency set, and iterating between a result of the contingency assessment for the active contingency set and a solution of the optimal power flow model to obtain a single automatic voltage control instruction; and performing a contingency assessment for a contingency set, and updating the single-time severe contingency sequencing table and the periodical severe contingency sequencing table according to a comprehensive result of the contingency assessment.

Abstract translation: 提供了一种静态安全约束的自动电压控制方法，其中包括：在每个控制周期内对电力系统的控制快照进行单次自动电压控制计算。 单次自动电压控制计算包括：从历史严重应急信息数据库获取单次严重应急排序表和周期性严重应急排序表，选择严重意外事件; 对主动应急集合进行应急评估，并对活动应急集合的应急评估结果与最优潮流模型求解获得单个自动电压控制指令之间的迭代; 并对应急组合进行应急评估，根据应急评估的综合结果更新单次严重应急排序表和周期性严重应急排序表。

公开(公告)号：US12270380B2

公开(公告)日：2025-04-08

申请号：US17446653

申请日：2021-09-01

Applicant: TSINGHUA UNIVERSITY

Inventor： Wenchuan Wu ,  Zizhen Guo ,  Hongbin Sun ,  Bin Wang ,  Qinglai Guo

IPC: F03D7/04 ,  F03D9/25

Abstract: A data-driven wind farm frequency control method based on dynamic mode decomposition. The method enables a low-dimension nonlinear dynamic feature of a wind power system to perform global capturing in a high-dimension space through a state transition matrix given by a Koopman operator theory, thus fewer data samples are necessary while control requirements are satisfied with respect to a model fitting accuracy. Meanwhile, a pure linear feature of a control model also provides a favorable foundation for fast on-line dynamic response, thereby satisfying response accuracy and speed requirements simultaneously in an actual control step.

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.