Gondal, Iqbal (1995) Application of modal analysis using adaptive schemes of interference cancellation for power line carrier communication systems. PhD thesis, Victoria University of Technology.

Abstract

With the increasing complexities of power system control, protection, operation and SCADA, there is a need to have a very reliable telecommunication network to provide data transmission in steady state and transient conditions of the system. Integrity of the data should be verified with the use of different back-up communication systems eg. microwave, power line carrier (PLC), fibre optic and private telecommunication networks etc. PLC is a very convenient back-up and is available at a very low cost, as it uses the same line for power transmission and PLC signal propagation. Due to the presence of ehv signal on the line, PLC equipment eg. line trap shows inefficient behaviour in providing appropriate attenuation to the PLC signal at busbars. As a result, leakage signal interferes with the PLC signal on adjacent line sections, operating at the same fi^equencies, which ultimately limits the utility of the available PLC spectrum. In this thesis, adaptive interference cancellation schemes based on adaptive identification, fuzzy logic and artificial neural network theories have been implemented on PLC systems. Studies of these cancellation schemes were also extended on a laboratory model of power line, which was designed based on Modal Analysis. The development of these techniques can help in providing extra attenuation to the PLC signal at the busbars and hence the power industry could use the same frequencies on adjacent line sections to make the maximum use of PLC for the power system utilities.

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