Performance of generator protection relays during off-nominal frequency operation

This paper reviews the protection requirements for generators during periods of off-nominal frequency operation. It investigates the behavior of instrument transformers during these periods as well as the impact of frequency on the accuracy of protection operating quantities. Traditional methods for frequency tracking and compensation are reviewed. A novel approach, which provides excellent performance for very significant frequency deviations and can accommodate multiple frequency islands, is presented.

[1]  Thomas Wagner,et al.  Gas Turbine Efficiency (GTE) Benefits of GTE Water Wash Systems , 2008 .

[2]  R. W. Ferguson,et al.  Methods of Starting Gas-Turbine-Generator Units [includes discussion] , 1954, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[3]  Donald Reimert.  Protective Relaying for Power Generation Systems , 2005 .

[4]  I. A. Terry,et al.  Dynamic braking of synchronous machines , 1932, Electrical Engineering.

[5]  Cyrus B. Meher-Homji,et al.  Gas Turbine Axial Compressor Fouling And Washing. , 2004 .

[6]  Joe H. Chow,et al.  Pelton turbine deflector control designs for Bradley Lake hydro units , 2002, Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301).