Title Electromagnetic transient analysis and novel protective relaying techniques for power transformers / Xiangning Lin, Jing Ma, Qing Tian, Hanli Weng

Published Singapore : John Wiley & Sons, 2015

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Description 1 online resource Contents 880-01 Principles of Transformer Differential Protection and Existing Problem Analysis -- Malfunction Mechanism Analysis due to Nonlinearity of Transformer Core -- Novel Analysis Tools on Operating Characteristics of Transformer Differential Protection -- Novel Magnetizing Inrush Identification Schemes -- Comprehensive Countermeasures for Improving the Performance of Transformer Differential Protection 880-01/(S 2.4.1 Modelling of the External Fault Inception and Removal and Current Transformer 70 -- 2.4.2 Analysis of Low Current Mal-operation of Differential Protection 72 -- 2.5 Analysis and Countermeasure of Abnormal Operation Behaviours of the Differential Protection of the Converter Transformer 80 -- 2.5.1 Recurrence and Analysis of the Reported Abnormal Operation of the Differential Protection of the Converter Transformer 80 -- 2.5.2 Time-Difference Criterion to Discriminate between Faults and Magnetizing Inrushes of the Converter Transformer 86 -- 2.6 Summary 95 -- References 95 -- 3 Novel Analysis Tools on Operating Characteristics of Transformer Differential Protection 97 -- 3.1 Introduction 97 -- 3.2 Studies on the Operation Behaviour of Differential Protection during a Loaded Transformer Energizing 99 -- 3.2.1 Simulation Models of Loaded Transformer Switch-On and CT 99 -- 3.2.2 Analysis of the Mal-operation Mechanism of Differential Protection 102 -- 3.3 Comparative Investigation on Current Differential Criteria between One Using Phase Current and One Using Phase-Phase Current Difference for the Transformer using Y-Delta Connection 109 -- 3.3.1 Analyses of Applying the Phase Current Differential to the Power Transformer with Y/Δ Connection and its Existing Bases 109 -- 3.3.2 Rationality Analyses of Applying the Phase Current Differential Criterion to the Power Transformer with Y/Δ Connection 113 -- 3.4 Comparative Analysis on Current Percentage Differential Protections Using a Novel Reliability Evaluation Criterion 117 -- 3.4.1 Introduction to CPD and NPD 117 -- 3.4.2 Performance Comparison between CPD and NPD in the Case of CT Saturation 118 -- 3.4.3 Performance Comparison between CPD and NPD in the Case of Internal Fault 121 -- 3.5 Comparative Studies on Percentage Differential Criteria Using Phase Current and Superimposed Phase Current 123 -- 3.5.1 The Dynamic Locus of p -- 1p +1 in the Case of CT Saturation 123 -- 3.5.2 Sensitivity Comparison between the Phase Current Based and the Superimposed Current Based Differential Criteria 126 Summary "An advanced level examination of the latest developments in power transformer protection This book addresses the technical challenges of transformer malfunction analysis as well as protection. One of the current research directions is the malfunction mechanism analysis due to nonlinearity of transformer core and comprehensive countermeasures on improving the performance of transformer differential protection. Here, the authors summarize their research outcomes and present a set of recent research advances in the electromagnetic transient analysis, the application on power transformer protections, and present a more systematic investigation and review in this field. This research area is still progressing, especially with the fast development of Smart Grid. This book is an important addition to the literature and will enhance significant advancement in research. It is a good reference book for researchers in power transformer protection research and a good text book for graduate and undergraduate students in electrical engineering. Chapter headings include: Transformer differential protection principle and existing problem analysis; Malfunction mechanism analysis due to nonlinearity of transformer core; Novel analysis tools on operating characteristics of Transformer differential protection; Novel magnetizing inrush identification schemes; Comprehensive countermeasures on improving the performance of transformer differential protection An advanced level examination of the latest developments in power transformer protection Presents a new and systematic view of power transformer protection, enabling readers to design new models and consider fresher design approaches Offers a set of approaches to optimize the power system from a microeconomic point of view "-- Provided by publisher Bibliography Includes bibliographical references and index Notes Print version record Subject Electric relays. Electric transformers -- Protection Transients (Electricity) TECHNOLOGY & ENGINEERING -- Power Resources -- General. Electric relays Electric transformers -- Protection Transients (Electricity) Form Electronic book Author Lin, Xiangning, author Ma, Jing, author Tian, Qing, author Weng, Hanli, author ISBN 9781118653838 1118653831 9781118653845 111865384X 9781118653852 1118653858 1118653823 9781118653821 1322334897 9781322334899

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