Resolving inconsistencies in three-phase current measurements
conference contributionposted on 2017-06-23, 10:03 authored by Andrew UrquhartAndrew Urquhart, Murray ThomsonMurray Thomson
It is widely assumed that any unbalance between phase currents in 4-wire distribution circuits will equal the neutral current; that is that the sum of currents is zero. In practice, however, measurements made at distribution substations often show significant inconsistency. Several possible explanations for this are explored, showing that calculations of the voltage drop and losses are more accurate if harmonics are included. More generally, feeder configurations are described in which the currents may not sum to zero.
This work was supported by the Engineering and Physical Sciences Research Council (EPSRC), UK (EP/I031707/1 and voucher 11220756) and by E.ON UK.
- Mechanical, Electrical and Manufacturing Engineering
- Centre for Renewable Energy Systems Technology (CREST)