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1.发明公开公开(公告)号：US20240088667A1
公开(公告)日：2024-03-14
申请号：US17765013
申请日：2022-01-21
发明人： Jian Yang , Zhijian Yu , Xinjian Chen , Dongbo Zhang , Jie Yu , Chenghuai Hong , Zihuai Zheng , Yuxi Tu , Lintong Wang , Weiming Lu , Qinye Chen , Zi Ying , Yizhi Zhu
CPC分类号： H02J3/381 , H02J13/00002 , H02J2300/24
摘要： Disclosed are a photovoltaic energy storage offline coordination system and method based on demand management. The system includes a photovoltaic generator set, an inverter, a dispatch and control device for charge-discharge, a load monitor, a first and second energy storage device, and a remote console. The photovoltaic generator set is electrically connected to the dispatch and control device for charge-discharge via the inverter; the first energy storage device is connected to a load-side power supply bus via a first dispatch and control unit; the second energy storage device is connected to the load-side power supply bus via a third dispatch and control unit; a second dispatch and control unit is connected to the load-side power supply bus; the load monitor is provided at the load-side power supply bus, and configured to monitor a load of the load-side.
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2.发明申请公开(公告)号：US20210408781A1
公开(公告)日：2021-12-30
申请号：US16621657
申请日：2019-10-10
申请人： STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. TAIZHOU POWER SUPPLY COMPANY , STATE GRID CORPORATION OF CHINA , NORTH CHINA ELECTRIC POWER UNIVERSITY
发明人： Ping ZHAO , Fengyuan WANG , Chi ZHANG , Yuande ZHENG , Yudong FANG , Hua XU , Zaibing ZHOU , Tao ZHENG , Yifan ZHU , Chenjing XU , Tao ZHU , Kang WANG , Zhen HUANG , Guode YING
摘要： Provided are a ground fault protection method and apparatus for a photovoltaic station output transmission line. A circuit breaker on a photovoltaic side is controlled by a control element. Whether measured zero sequence impedance on the photovoltaic side of a segment line has a large variation before and after an action of power grid side distance protection is determined, the variation of the measured zero sequence impedance is inputted into the control element, in condition that the variation of the measured zero sequence impedance is less than a setting value, a tripping signal is outputted to the circuit breaker on the photovoltaic side to isolate the fault; and in condition that the variation of the measured zero sequence impedance is greater than the setting value, photovoltaic side distance protection is not started.
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3.发明公开公开(公告)号：US20240097443A1
公开(公告)日：2024-03-21
申请号：US17767447
申请日：2022-01-14
发明人： Feng Guo , Jian Yang , Lintong Wang , Jiahao Zhou , Yefeng Luo , Dongbo Zhang , Yuande Zheng , Guode Ying , Minzhi Chen , Xinjian Chen , Jie Yu , Weiming Lu , Chi Zhang , Yizhi Zhu , Binren Wang , Chenghuai Hong
CPC分类号： H02J3/004 , H02J3/46 , H02J2203/20
摘要： A source-network-load-storage coordination dispatching method in a background of a coupling of renewable energy sources, including: taking an expectation of a minimum grid operating cost in a dispatching cycle as an objective function; generating an approximate value function of an output of a set for generating electricity from renewable energy sources and a user load, and constructing a source-network-load-storage coordination dispatching model with combination of the objective function; obtaining forecast data of the output of a set for generating electricity from renewable energy sources and the user load, and inputting the forecast data into the dispatching model for solving; performing iterative updating on the approximate value function, importing the approximate value function after the iterative updating into the dispatching model for iterative solving, and terminating an iterative process until a solving result satisfies a preset convergence condition; and using a solving result of a last iteration as a dispatching strategy.
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公开(公告)号：US20240055856A1
公开(公告)日：2024-02-15
申请号：US17762366
申请日：2022-01-14
发明人： Jiandong Si , Feng Guo , Zhijian Yu , Jiahao Zhou , Lintong Wang , Yefeng Luo , Zhouhong Wang , Dongbo Zhang , Yuande Zheng , Yuyin Qiu , Jie Yu , Zihuai Zheng , Lei Hong , Binren Wang , Ying Ren , Yuxi Tu , Huili Xie
摘要： Disclosed are a net load forecasting method and apparatus for a new energy electric power market. The method includes: obtaining and performing data preprocessing on new energy output data and external environmental data, and extracting strongly correlated features from the new energy output data and the external environmental data after the data preprocessing; performing feature expansion on the strongly correlated features, and inputting the strongly correlated features after the feature expansion into a preconstructed regression forecasting model, to obtain a first forecast value; obtaining and performing data preprocessing on user load data and load influencing factor data, and inputting the user load data and the load influencing factor data after the data preprocessing into a FNN-LSTM hybrid model, to obtain a second forecast value; and calculating a difference between the second forecast value and the first forecast value, to obtain a net load forecasting result.
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公开(公告)号：US11831165B2
公开(公告)日：2023-11-28
申请号：US17252294
申请日：2020-10-11
发明人： Jian Yang , Jianhua Lv , Guode Ying , Zuofu Jiang , Xin Wang , Haohua Wu , Yongling Li , Jianjun Zhu , Daojian Hong , Haili Liang , Huiqi Chen , Qingxi Cai , Baorong Liu , Yiting Hu , Xingbai Wang , Chuhang Xu , Lijun Zhu , Qiang Gao , Xinghui Jiang , Xiaofei Wang , Yin Lin , Xun Ma
CPC分类号： H02J3/388 , G05B13/048 , H02J3/008 , H02J3/24 , H02J3/32 , H02J7/0048 , H02J7/00712 , H02J7/345 , H02J2203/20 , H02J2207/50
摘要： A hierarchical control method for an island power grid energy storage system for increasing new energy generation fluctuation is disclosed. The method includes implementing a rolling dispatch method based on an idea of model predictive control; comprehensively considering a response capability of the energy storage system to grid-wide economic dispatch instructions and life loss of energy storage lithium batteries, and constructing an objective function of an intraday control model of the energy storage system with economic optimization; and constructing, on a basis of satisfying the objective function of the intraday control model, a real-time control model of the energy storage system and solving the model, and determining charge and discharge plans of a lithium battery energy storage system and a supercapacitor energy storage system.
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6.发明公开公开(公告)号：US20230243883A1
公开(公告)日：2023-08-03
申请号：US17781721
申请日：2021-12-03
申请人： STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. TAIZHOU POWER SUPPLY COMPANY , Taizhou Hongda Electric Power Construction Co., Ltd.
发明人： Jiandong Si , Feng Guo , Jian Yang , Yiqin Tang , Bin Tang , Jun Liu , Wenhui Li , Chengshi Zeng , Xin Lv , Jianguo Pan , Guanglei Wan , Qiuxiao Wang , Kang Wang , Xu Jiang , Huan Liu , Junzhe Liang
CPC分类号： G01R31/085 , G01R31/003
摘要： Disclosed is a multi-dimensional analysis method for a tripping risk of a whole transmission line due to a lightning shielding failure. A quantity of thunderstorm days, a tower size, a terrain proportion, an altitude, and insulation configuration data are collected for a transmission line for which a tripping risk due to a lightning shielding failure needs to be analyzed, and a striking distance, an exposure distance, a lightning resisting level of the line after altitude factor correction, and a lightning shielding failure risk of a single-base tower are calculated in turn. Characteristics of a lightning shielding failure under different nominal heights, quantities of thunderstorm days, and terrains are studied. Representative combination conditions are selected to calculate a tripping risk of a typical tower due to the lightning shielding failure. A weight coefficient is extracted, to calculate a tripping risk of the whole line due to the lightning shielding failure.
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公开(公告)号：US20210367426A1
公开(公告)日：2021-11-25
申请号：US15734989
申请日：2020-10-11
发明人： Jian Yang , Dongbo Zhang , Xinjian Chen , Yilun Zhu , Jie Yu , Daojian Hong , Zhouhong Wang , Chenghuai Hong , Zihuai Zheng , Huiying Gao , Minyan Xia , Bingren Wang , Guode Ying , Yizhi Zhu
摘要： A method for intelligently adjusting a power flow based on a Q-learning algorithm includes: converting a variable, an action, and a goal in a power grid to a state, an action, and a reward in the algorithm, respectively; selecting an action from an action space, giving an immediate reward based on a result of power flow calculation, and correcting a next state; forwardly observing a next exploration action based on a strategy in the Q-learning algorithm; updating a Q value in a corresponding position in a Q-value table based on the obtained reward; if a final state is not reached, going back to step 2; otherwise, increasing the number of iterations by 1; if the number of iterations does not reach predetermined value K, that is, Episode
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8.发明申请公开(公告)号：US20210109140A1
公开(公告)日：2021-04-15
申请号：US17109176
申请日：2020-12-02
发明人： Jian Yang , Yiping Shen , Xinjian Chen , Dongbo Zhang , Jie Yu , Yilun Zhu , Guode Ying , Bingren Wang , Minyan Xia , Huiying Gao , Chenghuai Hong , Yizhi Zhu , Hongqing Zhou , Qiulin Chen , Chunyan Ding , Chong Su
IPC分类号： G01R21/133 , G06N5/04 , G06N20/00
摘要： The present invention relates to a method for identifying parameters of a 10 kV static load model based on similar daily load curves. In the present invention, an optimization model for identifying full-period parameters of the static load model is proposed based on a large number of daily load curves with response characteristic, a structure and constraints of the static load model, and two theoretical basic assumptions about loads. Full-period (including 96 moments) static voltage model parameters of 10 kV loads are given through optimization solution. A rule that active power and reactive power of the loads at each moment change with voltage is obtained. In addition, a change rule of load constituents is obtained. The method delivers good applicability, satisfies actual demands, and is suitable for large-scale static model analyses for 10 kV loads.
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公开(公告)号：US11095126B2
公开(公告)日：2021-08-17
申请号：US16631627
申请日：2019-02-27
申请人： STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. TAIZHOU POWER SUPPLY COMPANY , STATE GRID CORPORATION OF CHINA
发明人： Xiaoping Fu , Wenqi He , Chi Zhang , Dongbo Zhang , Daojian Hong , Yuande Zheng , Minzhi Chen , Mingxu Chen , Zhen Huang , Guode Ying
摘要： Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller. The protection module is configured to provide low-frequency protection, over-frequency protection, over-voltage protection and low-voltage protection for the low-voltage DGR.
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公开(公告)号：US20200176995A1
公开(公告)日：2020-06-04
申请号：US16631627
申请日：2019-02-27
申请人： STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. TAIZHOU POWER SUPPLY COMPANY , STATE GRID CORPORATION OF CHINA
发明人： Xiaoping FU , Wenqi HE , Chi ZHANG , Dongbo ZHANG , Daojian HONG , Yuande ZHENG , Minzhi CHEN , Mingxu CHEN , Zhen HUANG , Guode YING
摘要： Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller. The protection module is configured to provide low-frequency protection, over-frequency protection, over-voltage protection and low-voltage protection for the low-voltage DGR.
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