Title:
APPARATUS AND METHOD FOR IDENTIFYING CABLE PHASE IN A THREE-PHASE POWER DISTRIBUTION NETWORK
Document Type and Number:
WIPO Patent Application WO2003079512
Kind Code:
A3
Abstract:
A line phase identification system and method identifies the phase of a power line at a remote unknown-phase line (160) in a three-phase power distribution network (100). The instantaneous phase of a known-phase line (150) is measured and saved each GPS second using a 1-pps time mark of a GPS receiver (660). The instantaneous phase at the unknown-phase line (160) is measured at a single GPS second using the 1-pps time mark of a GPS receiver (660) and compared to the phase measurement taken from the known-phase line (150) at the same GPS second. The differential phase between these simultaneously taken known and unknown instantaneous phases will be close to either 0, +120, or -120 degrees, thus identifying the line phase at the line under test (160).
Inventors:
PIESINGER GREGORY H (US)
Application Number:
PCT/US2003/007199
Publication Date:
December 31, 2003
Filing Date:
March 10, 2003
Export Citation:
Assignee:
PIESINGER GREGORY H (US)
International Classes:
G01R29/18; (IPC1-7): G01R19/00
Foreign References:
| US4626622A | 1986-12-02 | |||
| US5521491A | 1996-05-28 |
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