Take a look at the new version of this page: [ beta version ]. Tell us what you think.

ABSTRACT

Fault location in electric power grids has traditionally been achieved by measuring rms short-circuit current magnitudes on both ends of a faulted line, and then comparing simulations with these measurements. This paper presents a new fault location procedure based upon voltage-only measurements at a few busses in the system. The new procedure utilizes system impedance matrices and a least-squared error minimization technique to estimate the fault location. The estimation algorithm has been successfully tested with five actual faults to verify its validity. Three-phase and phase-to-ground faults are included in the analysis.

REFERENCES

• 1: John J. Grainger and William D. Stevenson, Jr., Power System Analysis, McGraw-Hill Inc., 1994.
• 2: Arthur R. Bergen and Vijay Vittal, Power System Analysis, Prentice Hall, 2000.
• 3: PSS/E Power System Simulator for Engineering, Siemens Power Transmission & Distribution, Inc., Schenectady, NY.
• 4: W. M. Grady, PCFLO (loadflow, short circuit, and harmonics analysis program), University of Texas at Austin, www.ece.utexas.edu/~grady.

INDEX TERMS

Keywords:
electric power grids, fault location, voltage sags