Generator step up transformer overvoltage protection in EPS power plants

Abstract

This paper presents the current state of the overvoltage protection of generator transformers in power plants of the Power Company of Serbia (EPS) and gives a critical overview of their overvoltage protection. Recommendations for the purpose of its control are provided. Improved overvoltage protection of power transformers in the EPS is suggested. A critical review of the state of earthing points of the generator transformers is also given.

Keywords

• overvoltage
• overvoltage protection
• transformers
• selection surge arresters
• monitoring surge arresters
• transferred overvoltage