Download or read book Hybrid Digital Differential Protection of Power Transformers written by Adel Aktaibi and published by . This book was released on 2017-01-17 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digital Protective Schemes for Power Transformer written by Dharmesh Patel and published by Springer Nature. This book was released on 2020-07-11 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of protection schemes used for power transformers and describes the internal fault conditions and external abnormalities that may disrupt the operation of a power transformer. It also highlights the issues of current protective schemes, which pose several challenges in terms of the detection of internal faults and abnormalities, including computational burden, reduced accuracy, difficulty to implement, increased cost, computational complexity, impermeability to high resistance faults (HRF), and malfunction in conditions like cross-country fault. To address these problems, the book develops an effective novel transformer protection scheme that can eliminate all the said difficulties using an innovative algorithm. Given its scope, it is a useful resource for researchers and practitioners working in the field of power system protection, allowing them to design novel protection schemes, and providing insights into the hardware validation of developed technique.
Download or read book Digital Differential Protection of Power Transformers Based on Walsh Functions written by M. A. Rahman and published by . This book was released on 1985 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advancement in Power Transformer Infrastructure and Digital Protection written by Nilesh Chothani and published by Springer Nature. This book was released on with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of a power transformer infrastructure and comprehensive digital protection of it. It presents various protective methodologies available to protect the transformer from disturbances by taking care of mal-operation due to external disturbances and providing fine protection to the transformer. Though there are many protection methodologies available in the practice. However, these existing methodologies may mal-operate during external disturbances such as inrush, over-fluxing and short circuits. Hence, further research is needed in addition to the existing methods of protection in terms of more fault prediction accuracy, speedy operation, and lower protection cost with zero error in the detection of faults. The book will be useful reference for practitioners from academia and industrial applications. .
Download or read book Wavelet Packet Transform and Direct quadrature Axis based Hybrid Technique for Differential Protection of Power Transformers written by Adel Aktaibi and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Detecting and identifying the disturbances in power transformers have always been challenging tasks for accurate and reliable protection of power transformers. Several approaches have been tested for designing protective devices such as DFT, ANN, fuzzy logic and wavelets etc. The modern power system is highly polluted with harmonics, and the transient disturbances usually are non-stationary and non-periodic. Thus, these techniques may not be adequate for protection of newer power transformers. Current research indicates that the wavelet packet transform (WPT) provides fast and accurate distinguishing criteria for this purpose, because WPT do not suffer from such problem. However, such wavelet based relay requires a certain sampling frequency for its analysis, which may have some impact on the new trend of interconnected protection system. According to IEEE standards (C57.116) and (1547), the requirement of 6 cycles of fault duration is valid for conventional and newer interconnected power transformer protection system. This research introduces a new dqWPT-based hybrid technique for the protection of power transformers to be integrated with the operation and control circuits without affecting their performance. The.
Download or read book Electromagnetic Transient Analysis and Novel Protective Relaying Techniques for Power Transformers written by Xiangning Lin and published by John Wiley & Sons. This book was released on 2015-03-02 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Digital Differential Protection of Power Transformer Using Matlab written by Adel Aktaibi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Power System Protection written by Paul M. Anderson and published by John Wiley & Sons. This book was released on 2022-02-15 with total page 1458 pages. Available in PDF, EPUB and Kindle. Book excerpt: A newly updated guide to the protection of power systems in the 21st century Power System Protection, 2nd Edition combines brand new information about the technological and business developments in the field of power system protection that have occurred since the last edition was published in 1998. The new edition includes updates on the effects of short circuits on: Power quality Multiple setting groups Quadrilateral distance relay characteristics Loadability It also includes comprehensive information about the impacts of business changes, including deregulation, disaggregation of power systems, dependability, and security issues. Power System Protection provides the analytical basis for design, application, and setting of power system protection equipment for today's engineer. Updates from protection engineers with distinct specializations contribute to a comprehensive work covering all aspects of the field. New regulations and new components included in modern power protection systems are discussed at length. Computer-based protection is covered in-depth, as is the impact of renewable energy systems connected to distribution and transmission systems.
Download or read book Digital protection of power transformers against internal faults written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Algorithms for digital protection of power transformers (PT) against internal faults have been presented in this doctoral dissertation. The presented algorithms for protection against short circuits of PT windings and for protection against ground-faults are based on time domain digital phase comparison. The digital phase comparator does not calculate the phase displacement between the signals which are being compared, but calculates the integral of the product of two signals over one basic half-period of the signals. The possibility of applying the phase comparison of the primary and secondary currents aimed at detecting internal faults in PTs has been investigated. In normal operating regimes and during faults outside the protection zone, the primary and secondary currents are in phase, while in case of internal short-circuit faults a phase shift appears between these two currents. In this dissertation, it has been shown that the phase shift between the primary and secondary currents during internal short-circuits depends both on the percentage of the short circuited windings and the network parameters as well as operating regime prior to the fault. It is possible to detect internal short-circuit faults by utilizing the phase comparison of the primary and secondary currents. The algorithm has been expanded by adding a digital filter for the dc component due to the existence of a decreasing dc current component in the fault current; in addition to this, the algorithm has been extended by adding the digital Fourier filter due to the existence of higher harmonics. In this way, the algorithm performance has been enhanced. Next, the algorithm that uses a new approach to solve the problem of misoperation of the transformer differential protection due to faults outside the protected zone accompanied by current transformer (CT) saturation has been presented. The new approach is based on the phase comparison of the primary and secondary currents, and is used as indication
Download or read book Optimizing and Measuring Smart Grid Operation and Control written by Recioui, Abdelmadjid and published by IGI Global. This book was released on 2020-11-13 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart grid (SG), also called intelligent grid, is a modern improvement of the traditional power grid that will revolutionize the way electricity is produced, delivered, and consumed. Studying key concepts such as advanced metering infrastructure, distribution management systems, and energy management systems will support the design of a cost-effective, reliable, and efficient supply system, and will create a real-time bidirectional communication means and information exchange between the consumer and the grid operator of electric power. Optimizing and Measuring Smart Grid Operation and Control is a critical reference source that presents recent research on the operation, control, and optimization of smart grids. Covering topics that include phase measurement units, smart metering, and synchrophasor technologies, this book examines all aspects of modern smart grid measurement and control. It is designed for engineers, researchers, academicians, and students.
Download or read book The Art and Science of Protective Relaying written by C. Russell Mason and published by . This book was released on 1997* with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Analysis for Digital Protection of Transformers written by Amitabha Gangopadhyay and published by . This book was released on 1984 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Algorithm for a Digital Transformer Differential Protection Based on a Least squares Curve fitting written by Ah Pak Liew and published by . This book was released on 1986 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Differential Protection for Arbitrary Three phase Power Transformers written by Zoran Gajić and published by . This book was released on 2008 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Differential Protection written by Gerhard Ziegler and published by John Wiley & Sons. This book was released on 2012-01-27 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Differential protection is a fast and selective method of protection against short-circuits. It is applied in many variants for electrical machines, trans-formers, busbars, and electric lines. Initially this book covers the theory and fundamentals of analog and numerical differential protection. Current transformers are treated in detail including transient behaviour, impact on protection performance, and practical dimensioning. An extended chapter is dedicated to signal transmission for line protection, in particular, modern digital communication and GPS timing. The emphasis is then placed on the different variants of differential protection and their practical application illustrated by concrete examples. This is completed by recommendations for commissioning, testing and maintenance. Finally the design and management of modern differential protection is explained by means of the latest Siemens SIPROTEC relay series. As a textbook and standard work in one, this book covers all topics, which have to be paid attention to for planning, designing, configuring and applying differential protection systems. The book is aimed at students and engineers who wish to familiarise themselves with the subject of differential protection, as well as the experienced user entering the area of numerical differential protection. Furthermore, it serves as a reference guide for solving application problems. For the new edition all contents have been revised, extended and updated to the latest state-of-the-art of protective relaying.
Download or read book AC DC Hybrid Large Scale Power Grid System Protection written by Xinzhou Dong and published by Springer Nature. This book was released on 2022-10-15 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: System protection is laid between the defenses for power system protective relaying and the emergency control. Under the premise of ensuring the safety of electrical equipment, it strives to ensure the safety of the system, block the chain of occurrence and growth of cascading faults, and effectively avoid the occurrence of large-scale blackout catastrophes. This book systematically elaborates on the dealing technology of a special type of fault, the “cascading fault”, in the AC-DC hybrid large-scale power grid. The main contents include immunization distance protection for accident overload; distance protection that is immune to oscillation; inverter control technology to prevent long-term or continuous commutation failure; DC participation emergency power flow control technology used to share the accident transfer overload caused by inverter lockout; and overhead transmission line adaptive overload protection.The basis of English translation of this book from its Chinese original manuscript was done with the help of artificial intelligence (machine translation by the service provider DeepL.com). A subsequent human revision of the content was done by the author.
Download or read book Network Protection Automation Guide written by and published by . This book was released on 2002 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
