Method and apparatus for phase identification in a three-phase power distribution network using servers

摘要

A remote phase identification system identifies the unknown phase attribute of any energized conductor within a three-phase power distribution network. A base station at a reference location obtains a reference phase each GPS second and stores it on one or more servers. A field probe at a remote location obtains an instantaneous phase measurement at a GPS second and communicates this phase to a field client. The field client communicates with the server either by wireless Internet or satellite modem to compare its field location phase measurement with the reference location phase measurement taken at the same GPS second. Field client tagging reference phase configuration files are automatically created for any circuit. Configuration files can be named, saved, and loaded and are used by the field client to identify and display the unknown field location phase attribute. A field client can be any personal computer, smartphone, or personal digital assistant.

主权项

1. A method of identifying phase in a three-phase power distribution network, said method comprising:
providing multiple base stations at multiple reference locations, said base stations configured to measure instantaneous phase each GPS second at said multiple reference locations and store said reference locations instantaneous phase on one or more servers; providing a field probe at a field location, said field probe configured to measure said field location instantaneous phase at a GPS second; providing a field client at said field location, said field client configured to communicate with said field probe and said one or more servers; communicating said field probe instantaneous phase to said field client; transmitting said field location instantaneous phase at a GPS second and said GPS second from said field client to said one or more servers; automatically calculating multiple offset phases for said field location by comparing said field location instantaneous phase to said multiple reference locations instantaneous phase on said one or more servers; selecting most appropriate offset phase of said multiple offset phases for said field location on said one or more servers; automatically calculating said field location phase attribute using said most appropriate offset phase on said one or more servers; and transmitting said field location phase attribute to said field client for display on said field client.