Effect of power cable insulator for power line communication
| Autor: | Toshihiko Arai, Kouichi Seki, Takato Kenji |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Twin-lead
Engineering business.industry Electrical engineering Energy Engineering and Power Technology Insulator (electricity) Transmission medium law.invention Standing wave Power-line communication law Object-relational impedance mismatch Power cable Electrical and Electronic Engineering business Radio wave Leakage (electronics) |
| Zdroj: | Electrical Engineering in Japan. 167:24-31 |
| ISSN: | 1520-6416 0424-7760 |
| Popis: | This paper describes a method for calculation of the effective relative dielectric constant es of VVF cable. For power line communications (PLC), VVF cables in homes are used as 2- to 30-MHz high-frequency transmission media. As they are not designed and installed for such transmission media, there are many branches and impedance mismatch points that cause PLC signal reflections and standing waves. In order to estimate such standing wave generation and estimate undesirable PLC signal radio wave leakage, the length of the cable and the relative dielectric constant es are important. However, the insulator of VVF cable is thin and not symmetric, so that it is not easy to calculate effective es analytically. In this paper, the effective es is calculated numerically using the PC software EXCEL by drawing the electrical fluxes and analyzing the effect of the insulator for each flux. The calculation result for VVF cable considering the limited insulator area around the conductors shows that the effective es is about 13% less and the transmission speed is 7% faster than when the insulator occupies the full space around the cable. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(4): 24–31, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20862 |
| Databáze: | OpenAIRE |
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