Electrical energy meter errors


by m.s.j
Tags: electrical, energy, errors, meter
m.s.j
m.s.j is offline
#1
Apr24-08, 06:37 AM
P: 219
A three phase and three wire energy meter has installed in a medium voltage network with a lot of third harmonic current and unbalanced load (approximately %10). As you know, any distortion in sine wave and deviation of rated frequency in AC electrical system may be cause the increasing of measuring errors.
According to a common technical practice, the third harmonic of measuring current can be trapped by using of suitable interposing current transformer with star-delta connection. This recommendation applied in above mentioned system and accuracy of measuring system improved, but the system was not disencumbered of third harmonic nuisance completely.

How can you explain the reason of nuisance continuity?

BEST REGARDS
MSJ


----------------------------------------------
Creative thinking is enjoyable,Then think about your surrounding things and other thought products. http://electrical-riddles.com
Attached Thumbnails
46.GIF  
Phys.Org News Partner Engineering news on Phys.org
A smart prosthetic knee with in-vivo diagnoses
Old tires become material for new and improved roads
Students take clot-buster for a spin

Register to reply

Related Discussions
Kinetic Energy -> Electrical Energy Classical Physics 14
Potential energy problem (last one had errors) Introductory Physics Homework 0
uncertainty/errors in meter stick measurements Introductory Physics Homework 3
Electrical Energy Introductory Physics Homework 0
Mechanical Kinetic Energy vs Electrical Potential Energy Introductory Physics Homework 3