A new technique for determining the location of ground fault in the rotor of synchronous generators with various types of excitation system

作者：Rahimi Taghanaki Siroos^*; Seifossadat Seyed Ghodratolah; Razzaz Morteza; Saffarian Alireza

来源：International Transactions on Electrical Energy Systems, 2016, 26(12): 2672-2683.

DOI：10.1002/etep.2227

• protection of synchronous generators
• rotor ground fault
• synchronous machine excitation system
• fault location

Ground fault in the rotor winding of generators can cause serious damage to the generators and consequently, to the power plant. This paper proposes a practical online technique to determine the ground fault location in the rotor winding of a synchronous generator. The proposed technique is based on the analysis of the measured voltage and input/output currents of the rotor winding. The main distinguishing feature of the proposed technique is that, contrary to the existing technique, it is applicable to various types of excitation system. The accuracy and applicability of the proposed technique is demonstrated through both computer simulations and experimental tests. The experimental tests have been carried out using a new device which works based on the proposed technique. The results show that the proposed technique can determine ground fault locations with a higher accuracy compared with the existing techniques.

• 出版日期2016-12