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公开(公告)号：US20250165664A1
公开(公告)日：2025-05-22
申请号：US19026349
申请日：2025-01-16
Applicant: SOUTHEAST UNIVERSITY
Inventor： Suhan Zhang , Wei Gu , Shuai Lu
IPC: G06F30/18 , G06F111/10
Abstract: Disclosed is an analytical method for dynamic analysis of a natural gas network in the field of energy system modeling and operational analysis, which includes establishing adynamic model of natural gas transmission according to the conservation equations, and reconstructing the dynamic model into the equations in a heat conduction equation form. The present disclosure directly constructs an analytical method for dynamic analysis of a natural gas network, avoiding approximation errors, numerical dispersion, and dissipation compared with the traditional numerical methods. The discretization process is avoided during the solution, greatly improving the computational efficiency and solution accuracy of dynamic analysis of the natural gas network.
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公开(公告)号：US11588706B2
公开(公告)日：2023-02-21
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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Patent Agency Ranking
公开(公告)号：US10982861B2
公开(公告)日：2021-04-20
申请号：US16107958
申请日：2018-08-21
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei Gu , Chenyu Wu , Zhi Wu , Suyang Zhou , Ping Jiang
Abstract: A CHP optimal dispatching model is a mixed integer programming model and is used for a district heating system (DHS) comprising a heat source, a heating network and a heat load, and the heating network comprises a heat transmission network and a heat distribution network. A plurality of heating areas is divided, and one day is divided into a plurality of time periods; the heat transmission loss of the heat distribution network is omitted, and a heat transmission network model taking transmission time delay of the heating network into consideration is established according to the heat transmission network; a terminal heat consumer model capable of reflecting indoor temperature is established; and a combined optimal dispatching model comprising conventional generators, wind power units, CHP units, electric boilers and heat storage tanks is established.
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4.发明授权公开(公告)号：US11449653B2
公开(公告)日：2022-09-20
申请号：US17605589
申请日：2021-04-06
Applicant: SOUTHEAST UNIVERSITY
IPC: G06F30/20 , G06F17/11 , G06F113/04 , G06F119/06 , G06F111/10
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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公开(公告)号：US10404065B2
公开(公告)日：2019-09-03
申请号：US15552189
申请日：2016-12-16
Applicant: SOUTHEAST UNIVERSITY
Abstract: A distributed predictive control based voltage restoration scheme for microgrids, comprising: step 10) adopting a distributed finite time observer to acquire the global reference voltage for restoring the voltage of each local controller; step 20) each local controller adopts a droop control to acquire the local voltage value of each generation, and adds a secondary voltage compensation term into the droop characteristic formula to form the voltage reference value of a distributed generation; step 30) establishing a trended prediction model; step 40) acquiring a predictive control term at a current time as the secondary voltage compensation command, and acting on the local controllers; and step 50) determining, whether the local voltage of each distributed generation of the microgrid reaches the voltage reference value under the secondary voltage compensation command.
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公开(公告)号：US11016455B2
公开(公告)日：2021-05-25
申请号：US16477174
申请日：2018-01-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei Gu , Shuai Lu , Guannan Lou , Jun Wang , Suyang Zhou
IPC: G05B19/042
Abstract: Disclosed is an integrated energy system operational optimization method considering thermal inertia of district heating networks and buildings, comprising the following steps. Step 10: respectively establish a district heating network model considering transmission delay and heat loss and a building model considering thermal storage capacity. Step 20: establish an integrated energy system optimization model consisting of a combined cooling, heat and power system model, the district heating network model and the building model. Step 30: solve the integrated energy system optimization model to obtain an optimal scheduling plan, control outputs of a gas turbine and a gas boiler per hour according to the optimal scheduling plan, and purchase electricity from a power grid and a wind power. According to the method, both the district heating network and buildings are included in a scheduling scope, so that the load adjustment with multiple degrees of freedom can be achieved.
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公开(公告)号：US10756569B2
公开(公告)日：2020-08-25
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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