Hybrid Digital Differential Protection of Power Transformers PDF Download

Author: Adel Aktaibi
Publisher:
ISBN: 9783659910432
Category :
Languages : en
Pages : 284

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Author: Dharmesh Patel
Publisher: Springer Nature
ISBN: 9811567638
Category : Technology & Engineering
Languages : en
Pages : 217

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Book Description
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.

Author: M. A. Rahman
Publisher:
ISBN:
Category :
Languages : en
Pages : 17

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Book Description

Author: Nilesh Chothani
Publisher: Springer Nature
ISBN: 9819938708
Category : Electric power systems
Languages : en
Pages : 331

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Book Description
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. .

Author: Adel Aktaibi
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
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.

Author: Xiangning Lin
Publisher: John Wiley & Sons
ISBN: 1118653823
Category : Technology & Engineering
Languages : en
Pages : 340

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Book Description
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

Author: Adel Aktaibi
Publisher:
ISBN: 9789535107507
Category :
Languages : en
Pages :

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Book Description

Author: Paul M. Anderson
Publisher: John Wiley & Sons
ISBN: 1119513146
Category : Technology & Engineering
Languages : en
Pages : 1458

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Book Description
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.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
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

Author: Recioui, Abdelmadjid
Publisher: IGI Global
ISBN: 179984028X
Category : Technology & Engineering
Languages : en
Pages : 400

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Book Description
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.