Sunday, May 27, 2018

ELECTROMAGNETIC TRANSIENT ANALYSIS AND NOVEL PROTECTIVE RELAYING TECHNIQUES FOR POWER TRANSFORMER By Xiangning Lin and Jing Ma

ELECTROMAGNETIC TRANSIENT ANALYSIS AND NOVEL PROTECTIVE RELAYING TECHNIQUES FOR POWER TRANSFORMER By Xiangning Lin and Jing Ma
Contents:
1 Principles of Transformer Differential Protection and Existing Problem Analysis
2 Malfunction Mechanism Analysis due to Nonlinearity of Transformer Core
3 Novel Analysis Tools on Operating Characteristics of Transformer Differential Protection
4 Novel Magnetizing Inrush Identification Schemes
5 Comprehensive Countermeasures for Improving the Performance of Transformer Differential Protection
Preface:
As the heart of the power system, the power transformer is crucial for the safety and stability of the power system, and the reliability of the protection arranged for the power transformer becomes a critical factor in guaranteeing the security of the system. Nevertheless, according to existing fault reports in the power industry, it is accidental event for the differential protection to mal-operate under some operating conditions. With the growing complexity of the power system structure and its components, the differential protection mal-operation events revealed have become an area of intense investigation in order to eliminate potential uncertainty and danger. Moreover, the electric circuit and the magnetic circuit, coupling in conjunction with each other, make the above phenomena even more intricate, as transformer switching events may cause electromagnetic transients. These phenomena remain an open issue and comprehensive studies are needed. However, while it is clearly essential to find out the origin of the abnormal operational behaviour in the power transformer, basic theory about electromagnetic transients in the power transformer is currently lacking. This book is published to address this problem directly.

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