Power quality event localization by multiple indexes

摘要

An apparatus includes an upstream/downstream probability module that determines, for each measurement point in an electrical power system, an upstream/downstream probability. The apparatus includes a zone module that identifies a plurality of zones within the power system and an upstream/downstream module that identifies, for each measurement point and for each zone, if a power quality event in a zone is upstream or downstream of a measurement point. The apparatus includes a zone probability module that determines a zone probability for each zone by multiplying the upstream probability or the downstream probability for each measurement point. The zone probability is a probability that the event happened in a zone. The zone probability module uses the upstream probability of a measurement point when the zone is upstream of the measurement point and uses the downstream probability when the zone is downstream of the measurement point.

主权项

1. An apparatus comprising:
an upstream/downstream probability module that determines, for each measurement point in an electrical power system, an upstream/downstream probability, an upstream/downstream probability comprising a probability that a power quality event was upstream of a measurement point and a probability that the power quality event was downstream of the measurement point, each measurement point within an electrical power system, the electrical power system comprising a plurality of measurement points; a zone module that identifies a plurality of zones within the electrical power system, wherein a measurement point defines a boundary between zones in the electrical power system; an upstream/downstream module that identifies, for each measurement point and for each zone, if a power quality event in a zone is upstream or downstream of a measurement point; and a zone probability module that determines a zone probability for each zone, a zone probability comprising a probability that the event happened in a zone, the zone probability module determining a zone probability for a zone by multiplying the upstream probability or the downstream probability for each measurement point, wherein the zone probability module uses the upstream probability of a measurement point when the upstream/downstream module determines that the zone is upstream of the measurement point and uses the downstream probability of the measurement point when the upstream/downstream module determines that the zone is downstream of the measurement point, wherein at least a portion of the upstream/downstream probability module, the zone module, the upstream/downstream module and the zone probability module comprise one or more of hardware and executable code, the executable code stored on one or more computer readable storage media.