Electrical Power Systems Essay Example | Topics and Well Written Essays - 2000 words

Electrical Power Systems - Essay Example Due to the continuous change of the loads at the low voltage network, the properties of the network vary with time and to measure the properties of the time variance we must determine the attenuation and the SNR that is evaluated for two single and separate tones at 52 kHz and 80 kHz and compare their behavior against a time component. A significant time variance is noted in the 52 kHz channel while the 80 kHz channel remains almost unchanged over the entire period of time. Any changes that may occur on the loading of the network have a direct influence on the communication properties of the low voltage network. The active power is measured in kilowatts while the apparent power generates magnetic fields that in return produce a flux that is necessary for the variation of induction devices. The lower power factor usually has a direct cost on the utility which serves as a major disadvantage in the network. The non linear loading is basically a rectifier and the power of distortion is a measure of the extent to which the harmonic distortion of the load of the current is able to decrease the average power that is transferred to the load. The non linear loads normally change the current wave form from a sine wave to other wave forms and also create harmonic currents. They can be corrected by use of filters to ensure that the harmonic currents are controlled and also through active power factor correction. In this test, a number of simulations will be carried out in order to evaluate the behavior of the harmonics that exist within a distributed system. The harmonics that flow within a network normally downgrade the quality of the electrical power in the network. Loads that are non linear in nature normally draw harmonic currents that are flowing through the distribution network. Harmonic voltages on the other hand are caused by the flow of harmonic currents