Generator Transformer Relay Protection Application

Author: Wang Weijian
Publisher:
Publish Date: 2005-01-01
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 , 2, and 3 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-element transverse 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 4 and 5 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 6 and 7 discuss loss-of-magnet and loss-of-step protection, with particular attention given to their setting calculations. Chapter 8 is dedicated to the main protection against negative-sequence burns on the rotor surface—rotor surface negative-sequence overload protection. Chapter 9 introduces over-excitation faults in generators and transformers and their corresponding protections. Chapter 10 provides a summary of various abnormal operating condition protections for generators and transformers. Chapter 11 explores the characteristics of relay protection configuration schemes for large generator-transformer units. The book closely combines practical applications, concisely introducing fundamental principles, setting calculations, and common issues. This book is primarily intended as a textbook for training courses on relay protection of electrical main equipment. It can also serve as a self-study manual for technicians in power plants and substations involved in the operation, design, and commissioning of main equipment relay protection. Additionally, it can be used as a teaching reference for students and teachers in the field of relay protection.