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Research on the Relationship between Communication Frequency Impedance Variation and Impulse Noise Characteristics in the Low-voltage Power Line Carrier
Pages: 47-50
Year: Issue:  1
Journal: Yunnan Electric Power

Keyword:  low-voltage power linecommunication frequencyimpedance variation rangeimpulse noiserelationship of impedance and noise;
Abstract: Choosing different environments on campus,the impedance of the low-voltage power line and channel noise in the range of 80 ~ 500 k Hz was measured by ratio method principle. Process and calculate the data obtained by collection,and then analyze the relationship between impulse noise characteristics and communication frequency impedance variation on low-voltage power line in different times. The analysis of results show that: in the range of 80 ~ 500 k Hz,the input- impedance variation and the number and power of impulse noise has the relationship of increasing or decreasing synchronously; Impedance has a strong time- varying;The impedance variation can be seriously influenced by the structure of the power grid,load type and quantity.
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