检索结果-南通市图书馆

A simple decision tree-based disturbance monitoring system for VSC-based HVDC transmission link integrating a DFIG wind farm

引用

Protection and Control of Modern Power Systems 2022年第1期7卷 363-381页

作者： Rajesh Babu Damala Rajesh Kumar Patnaik Ashish Ranjan Dash Department of EEE Centurion University of Technology and ManagementParalakhemundiOdishaIndia&GMR Institute of TechnologyRajamAndhrapradeshIndia Department of EEE GMR Institute of TechnologyRajamSrikakulamAndhra PradeshIndia Department of EEE Centurion University of Technology and ManagementParalakhemundiOdishaIndia

Fault detection and classification is a key challenge for the protection of High Voltage DC(HVDC)transmission *** this paper,the Teager-Kaiser Energy Operator(TKEO)algorithm associated with a decision tree-based fault classi-fier is proposed to detect and classify various DC *** Change Identification Filter is applied to the average and differential current components,to detect the first instant of fault occurrence(above threshold)and register a Change Identified Point(CIP).Further,if a CIP is registered for a positive or negative line,only three samples of currents(i.e.,CIP and each side of CIP)are sent to the proposed TKEO algorithm,which produces their respective 8 indices through which the,fault can be detected along with its *** new approach enables quicker detection allowing utility grids to be restored as soon as *** novel approach also reduces computing complexity and the time required to identify faults with *** importance and accuracy of the proposed scheme are also thor-oughly tested and compared with other methods for various faults on HVDC transmission lines.

关键词： Change Identification Filter differential current DC faults Simple Decision Tree Fault classifier HVDC transmission link Renewable Energy TKEO algorithm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A new protection scheme for PV-wind based DC-ring microgrid by using modified multifractal detrended fluctuation analysis

引用

Protection and Control of Modern Power Systems 2022年第1期7卷 100-123页

作者： Kanche Anjaiah Pradipta Kishore Dash Mrutyunjaya Sahani Department of Electrical Engineering Siksha‘O’Anusandhan Deemed to be UniversityBhubaneswarOdishaIndia Multidisciplinary Research Cell Siksha‘O’Anusandhan Deemed to be UniversityBhubaneswarOdishaIndia Department of Electrical and Electronics Engineering Siksha‘O’Anusandhan Deemed to be UniversityBhubaneswarOdishaIndia

This paper presents fault detection,classification,and location for a PV-Wind-based DC ring microgrid in the MATLAB/SIMULINK ***,DC fault signals are collected from local measurements to examine the outcomes of the proposed *** detection is carried out for all faults,(i.e.,cable and arc faults)under two cases of fault resistance and distance variation,with the assistance of primary and secondary detection techniques,***-order differential current derivatived2I3 dt2and sliding mode window-based Pearson’s correlation *** fault classification a novel approach using modified multifractal detrended fluctuation analysis(M-MFDFA)is *** advantage of this method is its ability to estimate the local trends of any order polynomial function with the help of polynomial and trigonometric *** also doesn’t require any signal processing algorithm for decomposition resulting and this results in a reduction of computational *** detected fault signals are directly passed through the M-MFDFA classifier for fault type *** enhance the performance of the proposed classifier,statistical data is obtained from the M-MFDFA feature vectors,and the obtained data is plotted in 2-D and 3-D scatter plots for better *** fault distance estimation is carried out for all types of faults in the DC ring bus microgrid with the assistance of recursive least squares with a forgetting factor(FF-RLS).To verify the performance and superiority of the proposed classifier,it is compared with existing classifiers in terms of features,classification accuracy(CA),and relative computational time(RCT).

关键词： DC ring microgrid differential current Fault resistance Detection Classification Fault location estimation Multifractal detrended fluctuation analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

current trajectory image-based protection algorithm for transmission lines connected to MMC-HVDC stations using CA-CNN

引用

Protection and Control of Modern Power Systems 2023年第1期8卷 97-111页

作者： Yingyu Liang Yi Ren Jinhua Yu Wenting Zha School of Mechanical Electronic and Information Engineering China University of Mining and Technology(Beijing) Beijing 100083China

In the presence of an MMC-HVDC system,current differential protection(CDP)has the risk of failure in operation under an internal *** addition,CDP may also incur security issues in the presence of current transformer(CT)saturation and *** this paper,a current trajectory image-based protection algorithm is proposed for AC lines connected to MMC-HVDC stations using a convolution neural network improved by a channel attention mechanism(CA-CNN).Taking the dual differential currents as two-dimensional coordinates of the moving point,the moving-point trajectories formed by differential currents have significant differences under internal and external ***,internal faults can be identified using image recognition based on *** is improved by a channel attention mechanism,data augmentation,and adaptive learning *** comparison with other machine learning algorithms,the feature extraction ability and accuracy of CA-CNN are greatly *** fault conditions like different net-work structures,operation modes,fault resistances,outliers,and current transformer saturation,are fully considered to verify the superiority of the proposed protection *** results confirm that the proposed current trajectory image-based protection algorithm has strong learning and generalizability,and can identify internal faults reliably.

关键词： Channel attention mechanism Convolutional neural network(CNN) differential current current trajectory image Modular multilevel converter-based high voltage direct current(MMC-HVDC)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Analysis Of A Misoperation Accident Of The 220kv Bus Difference Backup Protection

Analysis Of A Misoperation Accident Of The 220kv Bus Differe...

引用

作者： Liu Juan Chen Fang He Wei Zhong Kai State grid Hunan electric power company technical training center State grid Yibin electric power supply company State grid Zhuzhou power supply company

As the power grid continues to grow,the number of components on buses is *** requires bus differential protection to integrate reliability and *** paper has introduced the inspection and handling process of a malfunction accident of 220 kV microcomputer bus differential *** model bus differential protection was the product after six *** basic principle of busbar differential backup protection has been *** causes of misoperation caused by microcomputer bus differential protection are analyzed from three aspects:criterion of operation bus,generation of differential current,and rationality of operation bus voltage *** measures and solutions for preventing malfunction of microcomputer bus differential protection has been given in this *** the suggestion of changing the logic of the criterion of the running bus and the opening of the busbar voltage,the reliability of the protector has been greatly improved and the safe and stable operation of the power grid has been ensured.

关键词： Backup protection of bus differential Misjudgement Running busbar differential current Bus voltage closure opening

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

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：