公开(公告)号：US20200327411A1

公开(公告)日：2020-10-15

申请号：US16842500

申请日：2020-04-07

申请人： Di Shi ,  Jiajun Duan ,  Ruisheng Diao ,  Bei Zhang ,  Xiao Lu ,  Haifeng Li ,  Chunlei Xu ,  Zhiwei Wang

发明人： Di Shi ,  Jiajun Duan ,  Ruisheng Diao ,  Bei Zhang ,  Xiao Lu ,  Haifeng Li ,  Chunlei Xu ,  Zhiwei Wang

IPC分类号： G06N3/08 ,  G06N3/04 ,  G06K9/62 ,  H04L12/40

摘要： Systems and methods are disclosed for controlling a power system by formulating a voltage control problem using a deep reinforcement learning (DRL) method with a control objective of training a DRL-agent to regulate the bus voltages of a power grid within a predefined zone before and after a disturbance; performing offline training with historical data to train the DRL agent; performing online retraining of the DRL agent using live PMU data; and providing autonomous control of the power system below a sub-second after training.

公开(公告)号：US11178610B2

公开(公告)日：2021-11-16

申请号：US16392509

申请日：2019-04-23

申请人： Haifeng Li ,  Xiao Lu ,  Yingmeng Xiang ,  Chunlei Xu ,  Di Shi ,  Zhe Yu ,  Shiming Xu ,  Xueming Li ,  Jiangpeng Dai ,  Zhiwei Wang

发明人： Haifeng Li ,  Xiao Lu ,  Yingmeng Xiang ,  Chunlei Xu ,  Di Shi ,  Zhe Yu ,  Shiming Xu ,  Xueming Li ,  Jiangpeng Dai ,  Zhiwei Wang

IPC分类号： G05B13/04 ,  H04W52/02 ,  G06F1/3287 ,  G06F1/3209 ,  H02J3/00 ,  H02J3/14

摘要： Systems and methods are disclosed for power management by estimating power contingency of a grid at a cloud control center; performing decentralized real-time measurement and making local decisions at one more computer controlled outlets connected to the grid; and aggregating distributed loads to provide emergency frequency support to the grid.

公开(公告)号：US11114893B2

公开(公告)日：2021-09-07

申请号：US16396546

申请日：2019-04-26

申请人： Xiao Lu ,  Di Shi ,  Yingmeng Xiang ,  Haifeng Li ,  Chunlei Xu ,  Zhe Yu ,  Jiangpeng Dai ,  Shiming Xu ,  Xueming Li ,  Haiyun Han ,  Zhiwei Wang

发明人： Xiao Lu ,  Di Shi ,  Yingmeng Xiang ,  Haifeng Li ,  Chunlei Xu ,  Zhe Yu ,  Jiangpeng Dai ,  Shiming Xu ,  Xueming Li ,  Haiyun Han ,  Zhiwei Wang

IPC分类号： G05B23/02 ,  H02J13/00 ,  H02J3/14

摘要： Systems and methods are disclosed to control the power grid frequency by capturing the frequency change using an extended Kalman filter method with the distributed smart outlet devices at the low-voltage distribution level; and locally control the relay that provides power to the appliance by comparing the captured frequency with the threshold sent from the cloud control center.

公开(公告)号：US10770904B2

公开(公告)日：2020-09-08

申请号：US16390510

申请日：2019-04-22

申请人： Zhehan Yi ,  Haifeng Li ,  Xiaohu Zhang ,  Xiaoying Zhao ,  Di Shi ,  Ruisheng Diao ,  Zhiwei Wang

发明人： Zhehan Yi ,  Haifeng Li ,  Xiaohu Zhang ,  Xiaoying Zhao ,  Di Shi ,  Ruisheng Diao ,  Zhiwei Wang

IPC分类号： H02J3/38 ,  H02M7/5387

摘要： Systems and methods are disclosed to control a power inverter by extracting photovoltaic (PV) maximum power under a plurality of operating conditions as one or more reference variables; predicting the future behaviors of a PV output voltage as one or more controlled variables based on a current operational condition; generating one or more control signals for the H5 inverter that minimizes an error between the reference variable and the controlled variables; and controlling the power inverter with the one or more control signals.

公开(公告)号：US20190363541A1

公开(公告)日：2019-11-28

申请号：US16390510

申请日：2019-04-22

申请人： Zhehan Yi ,  Haifeng Li ,  Xiaohu Zhang ,  Xiaoying Zhao ,  Di Shi ,  Ruisheng Diao ,  Zhiwei Wang

发明人： Zhehan Yi ,  Haifeng Li ,  Xiaohu Zhang ,  Xiaoying Zhao ,  Di Shi ,  Ruisheng Diao ,  Zhiwei Wang

IPC分类号： H02J3/38 ,  H02M7/5387

摘要： Systems and methods are disclosed to control a power inverter by extracting photovoltaic (PV) maximum power under a plurality of operating conditions as one or more reference variables; predicting the future behaviors of a PV output voltage as one or more controlled variables based on a current operational condition; generating one or more control signals for the H5 inverter that minimizes an error between the reference variable and the controlled variables; and controlling the power inverter with the one or more control signals.

公开(公告)号：US10985572B2

公开(公告)日：2021-04-20

申请号：US16518619

申请日：2019-07-22

申请人： Jiajun Duan ,  Zhehan Yi ,  Xiao Lu ,  Di Shi ,  Zhiwei Wang

发明人： Jiajun Duan ,  Zhehan Yi ,  Xiao Lu ,  Di Shi ,  Zhiwei Wang

IPC分类号： H02J3/38 ,  H02J3/32 ,  G06N3/04 ,  G05B13/04 ,  G05B13/02

摘要： Systems and methods are disclosed to manage a microgrid with a hybrid energy storage system (HESS) includes deriving a dynamic model of a bidirectional-power-converter (BPC)-interfaced HESS; applying a first neural network (NN) to estimate a system dynamic; and applying a second NN to calculate an optimal control input for the HESS through online learning based on the estimated system dynamics.

公开(公告)号：US11264799B2

公开(公告)日：2022-03-01

申请号：US16392494

申请日：2019-04-23

申请人： Yishen Wang ,  Haifeng Li ,  Di Shi ,  Qibing Zhang ,  Chunlei Xu ,  Zhiwei Wang

发明人： Yishen Wang ,  Haifeng Li ,  Di Shi ,  Qibing Zhang ,  Chunlei Xu ,  Zhiwei Wang

IPC分类号： H02J13/00 ,  G05B13/04 ,  H02J3/00

摘要： Systems and methods manage electrical loads in a grid by applying Robust principal component analysis (R-PCA) to decompose annual load profiles into low-rank components and sparse components; extracting one or more predetermined features; constructing a similarity graph; selecting submodular cluster centers through the constructed similarity graph; determining a cluster assignment based on selected centers; and applying the clustering assignment for load analysis.

公开(公告)号：US20180156886A1

公开(公告)日：2018-06-07

申请号：US15787365

申请日：2017-10-18

申请人： Xiao Lu ,  Xinan Wang ,  Di Shi ,  Zhiwei Wang ,  Jianyu Luo ,  Chunlei Xu

发明人： Xiao Lu ,  Xinan Wang ,  Di Shi ,  Zhiwei Wang ,  Jianyu Luo ,  Chunlei Xu

IPC分类号： G01R35/00 ,  G01R19/25

CPC分类号： G01R35/005 ,  G01R19/2513 ,  Y02E60/728 ,  Y04S10/265

摘要： Data quality of Phasor Measurement Unit (PMU) is receiving increasing attention as it has been identified as one of the limiting factors that affect many wide-area measurement system (WAMS) based applications. In general, existing PMU calibration methods include offline testing and model based approaches. However, in practice, the effectiveness of both is limited due to the very strong assumptions employed. This invention presents a novel framework for online error detection and calibration of PMU measurement using density-based spatial clustering of applications with noise (DBSCAN) based on much relaxed assumptions. With a new problem formulation, the proposed data mining based methodology is applicable across a wide spectrum of practical conditions and one side-product of it is more accurate transmission line parameters for the energy management system (EMS) database and protective relay settings. Case studies are presented to demonstrate the effectiveness of the proposed method.

公开(公告)号：US10551471B2

公开(公告)日：2020-02-04

申请号：US15787365

申请日：2017-10-18

申请人： Xiao Lu ,  Xinan Wang ,  Di Shi ,  Zhiwei Wang ,  Jianyu Luo ,  Chunlei Xu

发明人： Xiao Lu ,  Xinan Wang ,  Di Shi ,  Zhiwei Wang ,  Jianyu Luo ,  Chunlei Xu

IPC分类号： G01R19/25 ,  G01R35/00

摘要： Data quality of Phasor Measurement Unit (PMU) is receiving increasing attention as it has been identified as one of the limiting factors that affect many wide-area measurement system (WAMS) based applications. In general, existing PMU calibration methods include offline testing and model based approaches. However, in practice, the effectiveness of both is limited due to the very strong assumptions employed. This invention presents a novel framework for online error detection and calibration of PMU measurement using density-based spatial clustering of applications with noise (DBSCAN) based on much relaxed assumptions. With a new problem formulation, the proposed data mining based methodology is applicable across a wide spectrum of practical conditions and one side-product of it is more accurate transmission line parameters for the energy management system (EMS) database and protective relay settings. Case studies are presented to demonstrate the effectiveness of the proposed method.

公开(公告)号：US11181873B2

公开(公告)日：2021-11-23

申请号：US16704920

申请日：2019-12-05

申请人： Zhe Yu ,  Yishen Wang ,  Haifeng Li ,  Chang Fu ,  Zhiwei Wang ,  Di Shi

发明人： Zhe Yu ,  Yishen Wang ,  Haifeng Li ,  Chang Fu ,  Zhiwei Wang ,  Di Shi

IPC分类号： G05B13/04 ,  H02J13/00 ,  H02J3/28

摘要： A method for managing a power load of a grid includes performing a statistic-based distribution estimation of a composite load model using static and dynamic models with Gibbs sampling; deriving a distribution estimation of load model coefficients; and controlling grid power based on a simulation, a prediction, a stability analysis or a reliability analysis with the load model coefficients.