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1.发明申请公开(公告)号：US20250077729A1
公开(公告)日：2025-03-06
申请号：US18034035
申请日：2022-03-29
Applicant: SOUTHEAST UNIVERSITY , Yunman Power Grid Co., Inc.
IPC: G06F30/20 , G06F113/06 , G06Q50/06 , G06Q50/08 , H02J3/00
Abstract: The present invention describes an electric-thermal-hydrogen multi-energy device planning method for zero energy buildings, including the following specific steps: firstly, constructing operation constraints of electric and thermal devices in the zero energy buildings; secondly, constructing operation constraints of hydrogen devices including the electrolyzer, the fuel cell and the hydrogen storage device; then, in view of constraints on annual zero energy of the buildings, establishing the robust electric-thermal-hydrogen multi-energy device planning model considering source-load uncertainties; and finally, solving the robust electric-thermal-hydrogen multi-energy device planning model of the zero energy buildings by adopting an alternating optimization procedure based column-and-constraint generation algorithm. By using the zero energy buildings, the planning method disclosed by the present disclosure plays important roles in aspects of promoting the development and utilization of renewable energy on the demand side, reducing energy consumption in the field of buildings, and reducing the emission of greenhouse gases.
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公开(公告)号：US20180358840A1
公开(公告)日：2018-12-13
申请号：US16107932
申请日：2018-08-21
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei GU , Guannan LOU , Suyang ZHOU , Zhi WU , Ge CAO
Abstract: A decentralized voltage control method for a microgrid based on nonlinear state observers, comprising the steps of step 10), establishing a large-signal model of distributed generations, a connection network and impedance-type loads in the microgrid; step 20), establishing a Luenberger-like nonlinear state observer for each distributed generation; step 30), estimating the dynamic characteristics of other distributed generations in real time based on the local measured values of each distributed generation; and step 40), implementing the decentralized voltage control based on the control requirements of reactive power sharing and voltage restoration. The control method realizes the voltage control of microgrid based on the decentralized state observers, which does not rely on communication transmission or remote measurement and avoids the adverse effects of communication latency and data drop-out on the control performance.
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公开(公告)号：US20240303391A1
公开(公告)日：2024-09-12
申请号：US18552284
申请日：2022-10-27
Inventor： Wei GU , Suhan ZHANG , Hai LU , Enbo LUO
IPC: G06F30/20
CPC classification number: G06F30/20
Abstract: Disclosed is a method for constructing a security region of an integrated electricity and heating system, falling into the field of energy system modeling and operational analysis. The method specifically includes: establishing a dynamic model of the integrated electricity and heating system, including a power system model, a quality-regulated heating system dynamic model, and a combined heat and power unit dynamic model; constructing, in combination with operational security constraints, a security region model of the integrated electricity and heating system considering thermal dynamics; and solving, aiming at nonlinear and nonconvex characteristics of the security region of the integrated electricity and heating system, a security region boundary by an optimization-check-based concave hull method. Compared with the related art, the method considers thermal dynamics in the integrated electricity and heating system, and accurately depicts operational features. Limited operation points are solved through the optimization-check-based concave hull method, thus guaranteeing security.
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公开(公告)号：US20230052730A1
公开(公告)日：2023-02-16
申请号：US17978149
申请日：2022-10-31
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei GU , Shan SONG , Suyang ZHOU , Zhi WU
Abstract: A method for predicting the operation state of a power distribution network based on scene analysis is provided, comprising the following steps of step 10) obtaining the network structure and historical operation information of a power distribution system; step 20) extracting representative scene sequence fragments of output of the DGs according to historical output sequences of the DGs; step 30) obtaining a multi-scene prediction result of a future single-time section T0 through matching the historical similar scenes; step 40) establishing a future multi-time section operation scene tree; and step 50) deeply traversing all scenes in the future multi-time section operation scene tree, performing power distribution network load flow analysis for each scene, calculating the line current out-of-limit risk and the busbar voltage out-of-limit risk of the power distribution network, and obtaining a future operation state variation tendency of the power distribution network with the DGs.
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5.发明申请公开(公告)号：US20220269837A1
公开(公告)日：2022-08-25
申请号：US17605589
申请日：2021-04-06
Applicant: SOUTHEAST UNIVERSITY
Abstract: A converter parameterized constant admittance modeling method based on a cross initialization including the following steps: (1) performing parameterized modeling on a converter, wherein switches are modeled using a parametric historical current source constant admittance model and other components are modeled using a traditional electromagnetic transient simulation integral model in the converter; (2) detecting whether state switching occurs, performing cross initialization correction when occurring; (3) determining model parameters, and establishing an equivalent admittance matrix and an injection current source of a whole grid, to obtain an electromagnetic transient simulation equivalent model; (4) solving a network tide according to a basic solving equation I=YU to obtain an electromagnetic transient model simulation result of the converter at current time; and (5) calculating an equivalent admittance matrix and an injection current source at next time through a current network state quantity, and returning to step (2) until a simulation terminates.
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Patent Agency Ranking
公开(公告)号：US20220094603A1
公开(公告)日：2022-03-24
申请号：US17283257
申请日：2020-04-02
Applicant: SOUTHEAST UNIVERSITY
Inventor： Guannan LOU , Yinqiu HONG , Wei GU , Xiaoyu JIANG , Shanlin LI , Quan YANG , Lina SHENG
Abstract: A method for designing a distributed communication topology of a micro-grid based on network mirroring and global propagation rates includes the following steps: first, determining the communication connectivity of distributed directed networks in the micro-grid; next, obtaining, for connected directed communication networks, mirror networks thereof based on a mirroring operation, and selecting an optimal distributed directed communication topology corresponding to a maximum performance indicator based on algebraic connectivity and communication costs; solving, for the optimized distributed communication topology, pinned distributed generation sets corresponding to different pinning numbers based on global propagation rates and out-degrees; and finally, establishing a distributed secondary voltage control of the micro-grid based on the optimal distributed communication network and pinned nodes of the micro-grid, to achieve accurate reactive power sharing and average voltage restoration.
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7.发明申请公开(公告)号：US20200212710A1
公开(公告)日：2020-07-02
申请号：US16639744
申请日：2018-04-27
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei GU , Shan SONG , Suyang ZHOU , Zhi WU
Abstract: A method for predicting the operation state of a power distribution network based on scene analysis is provided, comprising the following steps of step 10) obtaining the network structure and historical operation information of a power distribution system; step 20) extracting representative scene sequence fragments of output of the DGs according to historical output sequences of the DGs; step 30) obtaining a multi-scene prediction result of a future single-time section T0 through matching the real time scene with historical similar scenes; step 40) establishing a future multi-time section operation scene tree; and step 50) deeply traversing all scenes in the future multi-time section operation scene tree, performing power distribution network load flow analysis for each scene, calculating the line current out-of-limit risk and the busbar voltage out-of-limit risk of the power distribution network, and obtaining a future operation state variation tendency of the power distribution network with the DGs.
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公开(公告)号：US20250094663A1
公开(公告)日：2025-03-20
申请号：US18559292
申请日：2023-03-13
Applicant: SOUTHEAST UNIVERSITY
Abstract: A static voltage stability margin evaluation method and system, and a terminal device are related to the field of integrated energy system operation. The method includes the following steps: establishing a thermal dynamic model of a heating system; establishing a thermoelectric coupling device model; establishing a static voltage stability margin model of an electric power system that considers thermal dynamics of the heating system; and solving the model to obtain a voltage stability margin. In the present invention, a static voltage stability margin that considers thermal dynamics of a heating system can be obtained, and a Pareto boundary of the static voltage stability margin that considers the thermal dynamics can be obtained through a dual-objective nonlinear optimization method, so that an impact of thermoelectric coupling on voltage stability and an impact of thermal inertia of the heating system on a voltage stability margin can be revealed.
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9.发明公开公开(公告)号：US20230369852A1
公开(公告)日：2023-11-16
申请号：US18029973
申请日：2022-04-09
Applicant: Southeast University , ELECTRIC POWER RESEARCH INSTITUTE OF YUNNAN POWER GRID CO., LTD. , YUNNAN POWER GRID CO., LTD.
Inventor： Pengxiang LIU , Zhi WU , Hai LU , Wei GU , Yuping LU , Enbo LUO , Dada WANG , Qirun SUN , Hao ZHANG
IPC: H02J3/00
CPC classification number: H02J3/00 , H02J2203/20
Abstract: A method for calculating an optimal energy flow of an integrated electricity-gas system comprises: a convex optimization part of an optimal energy flow model is established according to a fuel cost of each thermal power unit node and a gas supply cost of each nature gas source node, and a convex relaxation formula of a quadratic constraint of the optimal energy flow model is established, and a convex function is expanded by a first order Taylor expansion at a relaxation solution to form an expansion formula; a precision requirement threshold value of a non-convex constraint is given, the threshold value is compared with an unbalance magnitude of a non-convex constraint in the expansion formula; when the unbalance magnitude is greater than the threshold value, the expansion is iterated into a solution model of the integrated electricity-gas hybrid energy system until the unbalance magnitude is not greater than the threshold value.
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10.发明申请公开(公告)号：US20200293703A1
公开(公告)日：2020-09-17
申请号：US16618378
申请日：2018-04-27
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei GU , Guannan LOU , Ge CAO , Wei LIU
Abstract: A microgrid delay margin calculation method based on critical characteristic root tracking includes: establishing a microgrid closed-loop small-signal model with voltage feedback control amount including communication delay based on a static output feedback, so as to obtain a characteristic equation with a transcendental term, performing critical characteristic root locus tracking for the transcendental term of the system characteristic equation, searching for a possible pure virtual characteristic root, and further calculating the maximum delay time in a stable microgrid. The method studies the relationship between the controller parameters and delay margins, thereby guiding the design of the control parameters, effectively improving the stability and dynamic performance of the microgrid.
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