Verification of measured transmission system phase angles

Author

Wilson, Robert E. ; Sterlina, Patrick S.

Author_Institution

Western Area Power Adm., Montrose, CO, USA

Volume

11

Issue

4

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1743

Lastpage

1747

Abstract

Measurement of power system phase angle is being studied for use in protective relaying, critical control circuits, and other applications. This paper compares phase angles measured by a synchronized measuring unit during field testing with classical theory. Power system positive sequence voltage and current phasors were recorded during testing of a new 525 kV compensated transmission system. Steady-state phase angles (δ) and magnitudes were measured relative to a satellite-based global time standard on synchronized measurement units at two substations. Phase angles were calculated using a recorded supervisory system and sending-end values of total power flow. Field measurements of the phase angle across a transmission system differed from calculations by -0.09° on average, contributing to verification of the new synchronized measurement technique

Keywords

phase measurement; power system measurement; substations; synchronisation; transmission networks; 525 kV; applications; classical theory; compensated transmission network; critical control circuits; field testing; measurement technique; phase angles measurement; positive sequence current phasor; positive sequence voltage phasor; power systems; protective relaying; steady-state phase angles; steady-state phase magnitudes; substations; synchronized measuring unit; transmission systems; Circuit testing; Goniometers; Measurement units; Phase measurement; Power measurement; Power system control; Power system measurements; Power system protection; Power system relaying; Power systems;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.544252

Filename

544252