Generator Transformer Relay Protection Application Second Edition

Author: Wang Weijian
Publisher:
Publish Date: 2004-02-25
Features: This book is a training textbook for relay protection of electrical main equipment, organized and compiled by the State Power Dispatch and Communication Center. The book is divided into eleven chapters. Chapters , two, and three introduce the main and backup protections for internal short circuits of generators and transformers, focusing on lectures on incomplete longitudinal differential protection and high-sensitivity unit cross-differential protection. It elaborates on the relationship between scalar braking differential protection and ratio braking differential protection, as well as the differences between fault component differential protection and ordinary differential protection. Chapters four and five cover various grounding protections for stator and rotor windings, with a special analysis of false tripping issues and the introduction of effective methods to prevent them. Chapters six and seven discuss loss-of-magnet and loss-of-step protection, with particular attention given to their setting calculations. Chapter eight is dedicated to the main protection against negative-sequence burnout of the rotor surface—rotor surface negative-sequence overload protection. Chapter nine introduces over-excitation faults in generators and transformers and their corresponding protections. Chapter ten provides a summary of various abnormal operating condition protections for generators and transformers. Chapter eleven explores the characteristics of relay protection configuration schemes for large generator-transformer units. The book closely integrates practical applications, concisely introducing fundamental principles, setting calculations, and common issues. This book is primarily intended as a teaching material for training courses on relay protection of electrical main equipment. It can also serve as a self-study textbook for technical personnel in power plants and substations involved in operation, design, and commissioning of relay protection for main equipment. Additionally, it can be used as a reference book for teaching and learning in the field of relay protection.