Power-line sag calculation by way of power-system state estimation
AssigneeABB Research Ltd.
InventorsErnst Scholtz, Reynaldo F. Nuqui, John D. Finney
Life of this patent
Estimating the term…
Abstract
A sag calculator (122) computes sag for a span of a section of a power line based at least in part upon a temperature of conductor lines in the line section. A temperature calculator (120) determines the temperature by computing a resistance ascertained through augmented state estimation techniques performed by a state estimator (118). A Supervisory Control and Data Acquisition (SCADA) system (104) acquires data used by the state estimator (118) to compute the resistance.
Claims27
A computer-implemented method comprising the following computer-executable acts:
- estimating a resistance of a conductor line in a line section by way of estimation of an augmented state;
- computing a temperature of the conductor line based at least in part upon the estimated resistance;
- and
- calculating a sag for a span in the line section based at least in part upon the computed temperature.
An apparatus, comprising:
- a sag calculator that calculates a sag for a span in a line section based at least in part upon a temperature of conductor lines in the line section, wherein the temperature is determined based at least in part upon a resistance of the line section ascertained by way of combined state and parameter estimation.
A computer-readable medium comprising computer-executable instructions for:
- calculating sag for a span of a line section based at least in part upon an estimated temperature of conductor lines in the line section, wherein the temperature is estimated based at least in part upon parameter estimation undertaken with respect to the line section by way of state estimation techniques;
- and
- storing the calculated sag.
Dependencies are inferred from the claim text.