Investigation of a new method for synchronous generator loss of excitation protection

ABSTRACT Synchronous generator loss of field can compromise both generator and power grid stability and therefore must be quickly detected. In this thesis, a new proposed method for LOF detection has been further explored and its shortcomings corrected.The detection index has been calculated based on these new modifications. The modifications include a more robust delta estimation technique and a removal of a required algorithm condition. Two methods are used to estimate the rotor angle and bothprovide a similar estimation. The first method depends on the integration of the rotor speed over time, while the second method is based on equations presented in a published paper. Moreover, the algorithm was tested on both a 2-bus system and the IEEE 9-bus system to investigate the detection time, security and reliability of the proposed method. The simulation model wasbuiltusing a Real Time Digital Simulator (RTDS) to simulate generator loss of excitation on a 2-bus and 9-bus system. The algorithm was then tested under various operating conditions (normal system conditions and disturbances). The advantages and drawbacks of the proposed algorithm are discussed in the thesis.

Grantor dc:publisher

University of Tennessee at Chattanooga

Author dc:creator

• Mohammed, Enass

Contributors dc:contributor

• Eltom, Ahmed H.
• Karrar, Abdelrahman A.; Kobet, Gary L.
• College of Engineering and Computer Science

• Electric power systems
• Electric power system stability

Licence

• https://rightsstatements.org/page/InC/1.0/?language=en

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/520

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1672