检索结果-内蒙古大学图书馆

第33届中国控制与决策会议

作者： Xiaodong Sun Huanxin Guan Yan Zhao Tieyan Zhang Yuri Wang Bo Yang School of Electric Power Shenyang Institute of Engineering State School of Renewable Energy Shenyang Institute of Engineering Key Laboratory of Regional Multi-energy System Integration and Control Liaoning Province School of Automation and Electrical Engineering Shenyang Ligong University State Grid Zhangye Power Supply Company

Accurate and reliable fault diagnosis is very important for improving relay protection performance and ensuring safe and stable operation of power *** paper presents a fault diagnosis method for distributed power distribution network based on convolutional neural *** fault occurs in the distribution network,FTU acquisition unit is used to sample the fault current and voltage signals of the distribution ***-Huang transform is applied to the fault signal,and a two-dimensional time-frequency energy matrix is *** the time-frequency energy matrix is input into the convolutional neural network to realize the fault type identification of transmission lines in the distribution network with distributed power *** simulation results show that the model in this paper improves the speed of fault diagnosis,makes the model more robust,and can determine and judge fault types more accurately and quickly.

关键词： power Distribution system with Distributed power Hilbert-Huang Transform Convolutional Neural Network Fault Classification

来源：评论

学校读者我要写书评

暂无评论

Optimal Scheduling Strategy of a Regional Integrated Energy system Considering Renewable Energy Uncertainty and Heat Network Transmission Characteristics

SSRN

引用

SSRN 2022年

作者： Chen, Haipeng Gao, Lin Zhang, Yongling Zhao, Chang Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China Department of Electrical Engineering Northeast Electric Power University Jilin132012 China Gongqing Institute of Science and Technology Gongqing City 332020 China National New Energy Group Jilin Jiangnan Thermal Power Limited Company Jilin132012 China

In order to overcome the curtailment of wind energy caused by "power determined by heat" of combined heat and power units, this study proposes an integrated demand response strategy and optimization method for heat-electric energy dispatching in a regional integrated energy system. Firstly, a scene analysis model based on Latin Hypercube Sampling (LHS) and Backward Reduction (BR) is constructed to analyze the probabilistic properties of wind power output in various scenes, and further provide a necessary reference for integrated energy scheduling. Secondly, the schedulable electrical power and thermal demand are evaluated with the consideration of the transmission characteristics of the heat supply network, then the integrated demand response of electric-thermal coordination is adopted to facilitate suppress the heat load fluctuation and wind power consumption. Finally, the optimal scheduling model of regional integrated energy system is established considering the source-load coordination, and the optimal output of each power unit is determined with the goal of minimizing overall cost during the scheduling period. The simulation results demonstrated that the proposed scheduling method reduces the operation cost of the integrated energy system and effectively promotes the wind energy consumption. Furthermore, it serves as a benchmark for the coordinated operation of wind turbines and power grids. © 2022, The Authors. All rights reserved.

关键词： Electric power utilization

来源：评论

学校读者我要写书评

暂无评论

A Hybrid Phase-Locked Loop for the Transient Stability Enhancement of Voltage Source Converters

A Hybrid Phase-Locked Loop for the Transient Stability Enhan...

引用

International Conference on power system Technology (powerCON)

作者： Zijun Wang Kehao Zhuang Hui Liu Xuekun Cheng Shiyao Qin Huanhai Xin Polytechnic Institute of Zhejiang University Zhejiang University Hangzhou P. R. China College of Electrical Engineering Zhejiang University Hangzhou P. R. China Grid-connected Operation Technology For Wind-Solar-Storage Hybrid System State Grid Corporation Key Laboratory State Grid Jibei Electric Power Research Institute Beijing China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems) China Electric Power Research Institute Beijing China

ISBN: (纸本)9781665407380

Phase-locked loop (PLL) is widely used in voltage source converter (VSC) to synchronize with grid. This paper comprehensively analyzes the transient stability of the PLL-VSC and obtains the VSC’s instability characteristics similar to the synchronous generator. The instability of VSC is mainly caused by insufficient deceleration area and instability without equilibrium point. To improve the transient stability of VSC, a hybrid PLL is proposed. This method dynamically compensates the phase of the PLL to improve the transient stability performance of the system without obtaining the specific parameters of the grid line. The phase compensation of PLL creates new equilibrium points to solve the most problem of insufficient deceleration area or no equilibrium point. Time-domain simulations are given to verify the effectiveness of the theoretical analysis.

关键词： power system dynamics Voltage power system stability Stability analysis Synchronous generators Synchronization Phase locked loops

来源：评论

学校读者我要写书评

暂无评论

Detection of False Data Injection Attacks in Smart Grid: A Secure Federated Deep Learning Approach

arXiv

引用

arXiv 2022年

作者： Li, Yang Wei, Xinhao Li, Yuanzheng Dong, Zhaoyang Shahidehpour, Mohammad The Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China The School of Artifcial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China The School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore The Electrical and Computer Engineering Department Illinois Institute of Technology ChicagoIL60616 United States The ECE Department The King Abdulaziz University Saudi Arabia

As an important cyber-physical system (CPS), smart grid is highly vulnerable to cyber attacks. Amongst various types of attacks, false data injection attack (FDIA) proves to be one of the top-priority cyber-related issues and has received increasing attention in recent years. However, so far little attention has been paid to privacy preservation issues in the detection of FDIAs in smart grids. Inspired by federated learning, a FDIA detection method based on secure federated deep learning is proposed in this paper by combining Transformer, federated learning and Paillier cryptosystem. The Transformer, as a detector deployed in edge nodes, delves deep into the connection between individual electrical quantities by using its multi-head self-attention mechanism. By using federated learning framework, our approach utilizes the data from all nodes to collaboratively train a detection model while preserving data privacy by keeping the data locally during training. To improve the security of federated learning, a secure federated learning scheme is designed by combing Paillier cryptosystem with federated learning. Through extensive experiments on the IEEE 14-bus and 118-bus test systems, the effectiveness and superiority of the proposed method are verified. Copyright © 2022, The Authors. All rights reserved.

关键词： Smart power grids

来源：评论

学校读者我要写书评

暂无评论

Fault diagnosis for PV arrays considering dust impact based on transformed graphical features of characteristic curves and convolutional neural network with CBAM modules

引用

Applied Energy 2024年 355卷

作者： Jiaqi Qu Qiang Sun Zheng Qian Lu Wei Hamidreza Zareipour School of Instrumentation and Optoelectronic Engineering Beihang University Beijing China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing China School of Electronics and Information Engineering Beihang University Beijing China The Department of Electrical and Computer Engineering University of Calgary Calgary Canada

Various faults can occur during the operation of photovoltaic (PV) arrays, and both dust-affected operating conditions and various diode configurations complicate the faults. However, current methods for fault diagnosis based on I-V characteristic curves usually do not effectively use all the distinguishable information contained in the I-V curves or often rely on calibrating the field characteristic curves to standard test conditions (STC). It is difficult to apply these methods in practice and accurately identify multiple complex faults with similarities in different blocking diode configurations of PV arrays under the influence of dust. Therefore, a novel fault-diagnosis method for PV arrays that considers the impact of dust is proposed. In the pre-processing stage, the Isc-Voc normalized Gramian angular difference field (GADF) method is presented, which normalizes and transforms the resampled PV array characteristic curves from the field, including I-V and P-V, to obtain transformed graphical feature matrices. Subsequently, in the fault diagnosis stage, the convolutional neural network (CNN) model with convolutional block attention modules (CBAM) is designed to classify faults, which identifies complex fault types from the transformed graphical matrices containing complete discriminative fault information. In addition, the performances of different graphical feature transformation and CNN-based classification methods are compared using case studies. The results indicate that the developed method for PV arrays with different blocking diode configurations under various operating conditions has high fault diagnosis accuracy and reliability.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research of Virtual Impedance control Strategy of Hybrid Renewable Energy Microgrid

Research of Virtual Impedance Control Strategy of Hybrid Ren...

引用

作者： Qingguang Yu Zhicheng Jiang Mengchu Zhao State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijng State Grid Beijing Urban District Power Supply Company Beijing

The principle of virtual impedance is analyzed in detail, and the simulation of parallel connection of inverter with different capacity is compared and analyzed in detail. The principle of virtual impedance is analyzed, and its derivation and analysis are carried out in detail. The simulation results show that the reactive power of parallel inverters with different capacities without virtual impedance cannot be distributed proportionally, and there is a large reactive circulation between inverters, which seriously threatens the safe and stable operation of micro grid. After the introduction of virtual impedance, reactive power distribution can be effectively improved, and the distribution effect is better with the increase of virtual impedance, but it will cause voltage sag of AC bus. This paper introduced the virtual impedance into the traditional droop control, make the output impedance and line impedance of the inverter are mainly inductive, so the droop control algorithm is implemented. This paper presented a new method based on the virtual impedance to adjust the frequency and voltage of the micro-grid bus to realize the adjustment of the voltage of the micro grid.

关键词： Virtual impedance control strategy hybrid renewable energy microgrid

来源：评论

学校读者我要写书评

暂无评论

A Summary of Research on Combustion Stability of Coal-fired power Station Boilers

A Summary of Research on Combustion Stability of Coal-fired ...

引用

Chinese Automation Congress (CAC)

作者： Guoyuan Cai Yuguang Niu Xuefei Liu State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing P. R. China School of Control and Computer Engineering North China Electric Power University Beijing P. R. China

ISBN: (数字)9781665426473

ISBN: (纸本)9781665426480

The research on the combustion stability of coal-fired power plant boilers is related to the safe operation and economic benefits of the boiler. The combustion stability judgement plays an important role for the assessment of flexibility retrofit with coal-fired power plants participating in deep peak-regulating operation. Therefore, the study of combustion stability judgment has always been a hot research direction. This paper briefly introduces the development history of boiler flame combustion stability research, and focuses on two popular research directions in this field in recent years, namely flame image combustion stability detection method and multi-information fusion combustion Stability testing methods, briefly summarize the development trends of these two research directions and their respective advantages. Then, the current research status and problems in this field are put forward three aspects of thinking and suggestions. Finally, several problems that need to be solved in the future development of combustion stability research are summarized.

关键词： Economics Automation Furnaces Fires Boilers Market research Combustion

来源：评论

学校读者我要写书评

暂无评论

Resonance analysis of wind power integration via mmc-hvdc based on frequency-coupled impedance scanning method 16

Resonance analysis of wind power integration via mmc-hvdc ba...

引用

16th IET International Conference on AC and DC power Transmission, ACDC 2020

作者： Wang, Xiao Liu, Hui Feng, Zhenjiang Sheng, Siqing Zhao, Qing State Grid Jibei Electric Power Co. Ltd. Research Institute North China Electric Power Research Institute Co. Ltd. Beijing China Grid-Connected Operation Technology Wind-Solar-Storage Hybrid System State Grid Corporation Key Laboratory Beijing China Department of Electrical and Electronic Engineering North China Electric Power University Baoding China

ISBN: (纸本)9781839533914

The risk of resonances in the frequency range of several hertz to several hundred Hertz may occur in wind farms integration via MMC-HVDC. Stability of wind power integration via MMC-HVDC based on frequency-coupled impedance scanning method is analysed in this paper. First, a frequency-coupled impedance analysis method that is used to measure the sequence impedance models of wind power integration via MMC-HVDC is presented. Then, the network damping stability criterion and aggregated RLC circuit approach is applied for the quantitative assessment of potential resonance risk. Finally, impedance characteristic and stability assessment of doubly-fed induction generator-based wind farms integration via MMC-HVDC is analysed for the resonances in sub/super-synchronous frequency band, medium frequency band and high frequency band respectively. © 2020 Institution of engineering and Technology. All rights reserved.

关键词： Wind power

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional Leakage Magnetic Field Simulation and Short-circuit Impedance Calculation of Large Yoke Transformer

Three-dimensional Leakage Magnetic Field Simulation and Shor...

引用

International Conference on Intelligent Computing, Automation and systems (ICICAS)

作者： Peng Zhihua Zeng Hongfa Tan Mingjian Yin Jintian Lin Li Huang Guohua Tang Jie School of Electrical Engineering Shaoyang University Shaoyang Hunan China Hunan Provincial Key Laboratory of Power Grid Operation and Control in Multi-power Areas Shaoyang University Shaoyang Hunan China Hengyang Power Supply Branch of State Grid Hunan Electric Power Co. Ltd. Hengyang Hunan China

ISBN: (纸本)9781665428118

Limited by road and railway transportation conditions, the volume of large transformers cannot be increased indefinitely. For this reason, it is necessary to compress the height of the transformer core for transportation. However, the change of the core size will cause problems such as uneven distribution of the leakage magnetic field, excessive loss of the leakage magnetic field, and changes in the short-circuit impedance. Based on Magnet software, a three-dimensional transient field simulation analysis of the short-circuit performance of a 500kV single-phase three-column yoke transformer was carried out in this paper, and the leakage magnetic field and winding short-circuit impedance of the yoke transformer were obtained. The simulation results were compared with the experimental values provided by the manufacturer, showing small error, which verified the simulation method, and provided theoretical guidance for transformer design in the actual engineering.

关键词： Solid modeling Analytical models Windings Transportation Transformer cores Transformers Magnetic fields

来源：评论

学校读者我要写书评

暂无评论

Magnetic field simulation and no-load loss calculation of large three-phase five-column disassembled transformer

Magnetic field simulation and no-load loss calculation of la...

引用

International Conference on Intelligent Computing, Automation and systems (ICICAS)

作者： Peng Zhihua Sun Yuqing Tan Mingjian Yin Jintian Lin Li Huang Guohua Tang Jie School of Electrical Engineering Shaoyang University Shaoyang Hunan China Hunan Provincial Key Laboratory of Power Grid Operation and Control in Multi-power Areas Shaoyang University Shaoyang Hunan China Hengyang Power Supply Branch of State Grid Hunan Electric Power Co. Ltd. Hengyang Hunan China

ISBN: (纸本)9781665428118

Due to the limitation of transportation conditions, the volume of the transformer cannot be increased indefinitely. Therefore, it is necessary to disintegrate the iron core for transportation. Due to structural changes, the magnetic field distribution of the transformer core may be disordered and the no-load loss is too large. This paper, based on the field-circuit coupled finite element, conducted the three-dimensional transient electromagnetic field simulation study on the no-load performance of a large-scale three-phase five-column disassembled transformer. The magnetic density, no-load current and no-load loss of the transformer iron core were calculated. The simulation results were consistent with the experiment, verifying the correctness of the simulation method.

关键词： Solid modeling Simulation Transportation Transformer cores Transformers Iron Software

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：