الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Voltage and current harmonics seriollsly affect the power supply quality. Voltage and CUfT’CI’It harmonics measurements are the tools used for determination of hanuonic ~. Sud1 hannonics produced by discontinuous conducting devices and non-linear Io8ds create recognized problems for must power distribution systems. These problems can lead to over heating and power losses of power system distribution components.
This thesis presents study of the effect of the hanuonics on the accuracy of readings 0( watt-hour meters when subjected to hanuonic voltage and current conditions. Such CORditions involved differences in voltage and current magnitudes as well as diffcrenc:cs in the voltage and current total hannonic distortion levels. This study presents comparison between the electromechanical energy meters and the electronic digital energy meters. The study also includes the accuracy of readings when the meIerS an: subjected the same non-linear and all similar conditions.
The hIrmonics were measured using VIP system \\I illustreting the THO of voltage and current when power factor compensating capacitors were used and when the power factor compensating capacitors were disconnected to the load side.
h was found that the accuracy and the sensitivity as well the precision of digital dec80nic meters are higher than the electromechanical one. When using both meters to •••• die energy consumed by the loads. It was noticed that there is a difference between readings of the tWo compared types and the digital electronic meter amountS 8bout. difference of (* 0.5% - 1% ) which is a considerable amount of energy for
••• consumers.
Aft economical assessment was made and showed that the digital meter is saving IIIout (l.E ISOOOO - L.E 300000) per month i.e .. L.E 1.8 Million - L.E 3.6 Million per annum for the distribution company against the large consumers only. If we COItSicIer the small consumer it may •.•• ..ach L.E 4.5 Million per annum.
1be study illustrates the idea and recommend the distribution companies to use digital electronic meters to replace the old electromechanical meters especially for large and medium consumers.