Investigation of various options to avoid false tripping of a primary distribution feeder: Part II — Solution techniques

Author

Dahal, Om P. ; Brahma, Sukumar M. ; Ranade, Satish J. ; Malahowski, Robert J.

Author_Institution

Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA

fYear

2011

Firstpage

1

Lastpage

8

Abstract

Pacific Gas and Electric is facing a problem on several of its 34 kV underground feeders in the San Francisco area. These feeders trip due to ground relay operation while being energized. Our previous paper on this issue described the modeling of a problematic feeder with PSCAD/EMTDC^®, and validation of the model by comparing our simulation results with field-test results. This paper summarizes the modeling and validation for continuity, and discusses various options to resolve this problem. Each option is simulated, and results are analyzed. Advantages and disadvantages of each option are listed, and recommendations are made.

Keywords

circuit breakers; power distribution protection; relays; underground distribution systems; PSCAD-EMTDC; false tripping; field-test results; ground relay operation; pacific gas; primary distribution feeder; underground feeder; voltage 34 kV; Current transformers; Harmonic analysis; Impedance; Power cables; Resistance; Substations; Surges; Asynchronous switching; Digital Fourier transform; digital relaying; power distribution system; transformer inrush; zero sequence current;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2011 IEEE

Conference_Location

San Diego, CA

ISSN

1944-9925

Print_ISBN

978-1-4577-1000-1

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PES.2011.6039048

Filename

6039048