Abstract
In the recent years, many applications of PLC have been adopted to use the power line as a link for High Frequency (HF) communication systems. One problem of such system is that the noise present in the power line may affect the communication signal. It has been found that the high frequency harmonics produced from high power converters, which cover a wide range of frequencies can cause serious problems of interference with PLC communication systems.The power converters have been widely used for normal industrial applications. It can be used as a rectifier to produce a high power charger or part of a complicated ac motor drive system. While some systems contain both rectifier and inverter such as, frequency changer, high voltage direct current (HVDC) transmission links, high power frequency changers and the Uninterrupted Power Supply (UPS) systems. The high power switching devices are used for many more applications because of their low cost, high efficiency, controllability and reliability.The problem may occur in transmission stage as in HVDC.The problem becomes more complicated when the harmonics is originating in many single sources. The harmonics can be propagated throughout the entire interconnected power network.In this paper,high frequency distortion and the corresponding noise level in power line communication is discussed in detail.
Keywords: Power Line Communication (PLC), Signal to Noise Ratio (SNR), Harmonic Reduction, Power Line Carrier
Full Issue
| View or download the full issue | PDF 1-9 |