US 2008/0189061 A1 · REAL-TIME POWER-LINE SAG MONITORING USING TIME-SYNCHRONIZED POWER SYSTEM MEASUREMENTS

Abstract

A sag calculator (112) computes sag for a span of a line section based at least in part upon an average temperature of the conductors in the line section. A temperature calculator (110) determines the temperature by ascertaining an ohmic resistance of the conductor lines based at least in part upon time-synchronized power system voltage and current measurements such as (but not limited to) phasor measurements generated by phasor measurement units (104, 106). The temperature calculator (110) determines the temperature as a function of the ohmic resistance.

Claims28

Dependent claims

A computer-implemented method comprising the following computer-executable acts:

receiving a conductor temperature of a power line, wherein the temperature is determined based at least in part upon time-synchronized voltage and current phasor measurements;
and
computing sag for a span of interest in the power line based at least in part upon the received temperature,
wherein computing the sag for the span of interest comprises computing a zero tension length for a conductor of the span at a reference temperature as a function of a known length of the conductor at the reference temperature and a cross sectional area of the conductor.

1 more element

Dependencies are inferred from the claim text.

Real-time power-line sag monitoring using time-synchronized power system measurements

Life of this patent

Real-time power-line sag monitoring using time-synchronized power system measurements

Life of this patent

Abstract

Claims28