ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 308)

The deployment of PLC distribution networks has enabled the introduction of

high throughput in “white” areas not served by ADSL offers. So, these two com-

munes could have access to high throughput Internet from a point of presence close

to the communes via a complete PLC architecture.

Large-Scale PLC Networks

Outside France, large-scale PLC distribution networks have been deployed in Spain

(Saragossa and Barcelona) by the DS2 company and in the United States by Current

Technologies, which has deployed PLC networks in the states of Maryland and

Texas for a 4-Mbit/s symmetrical Internet access offer potentially aimed at two mil-

lion people.

Fribourg (Switzerland) was among the first cities to deploy a PLC distribution

network with the Ascom technology in 2001 with the Swisscom Internet access pro-

vider.

In France, one of the major PLC distribution network projects was supported

by Sipperec, an administrative collectivity in the energy and communications field

in the Île-de-France department.

Example of Deployed PLC Networks

Table 12.4 gives a wide range of examples of current and past PLC deployments

worldwide.

Another European example is located in Germany with the company PPC.

In Germany around 10,000 end users are already using commercial Internet ser-

vices over LV-PLC. Eighty-five percent of the end customers are using the PLC tech-

nology of Power Plus Communications AG (PPC). This technology is based on the

PLC System of Main.net Ltd. (Israel). PPC is the PLC system integrator for Power-

line equipment and on March 2005 installed, for a number of operators, several

commercial and test installations all over Germany (103 MV PLC links).

In Germany, medium voltage powerline will be used in most cases as the back-

bone in the LV PLC network for substations, which have no direct connection to the

fiber backbone.

Eighty percent of the lines are used as the backbone for an installed LV PLC sys-

tem and 20% as rented or leased lines for professional industrial customers. One

hundred and one of the total lines are realized with different types of capacitive cou-

pling devices of PPC. In two test installations, inductive couplers of Eichhoff are

installed.

PPC has equipped a wide spectrum of MV cells with PLC equipment. The MV

cells diversify in voltage range and insulation of the cell itself. The voltage range var-

ied from 6 to 30 kV. Figure 12.16 shows typical MV PLC installations in Germany

for air and gas insulated (SF6) cells equipped with capacitive couplers.

Figure 12.17 shows another typical capacitive coupling device installation on

an MV cell.

The maximum throughput is 3 to 5 Mbit/s, depending on line condition in the

PPC deployment in Germany.

Implementation of a Communitywide PLC Network 289

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 308