Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

Cost 286 Wroclav 17-18/09/2003 1/27

Budapest University of Technology and Economics

Faculty of Electrical Engineering and Informatics

Department of Electric Power EngineeringPower Systems and Environment Group

György VARJÚ, professor

János LÖCHER, PhD student

Cost 286 Wroclav 17-18/09/2003 2/27

IntroductionPLT application in open wire insulated LV power

line

Laboratory investigations

- Presenting of our PLT Laboratory

- Laboratory tests

- Used disturbance sources

- Conclusions

- “Some Strange Result”

- Introducing used PLT devices

Cost 286 Wroclav 17-18/09/2003 3/27

Devices (1/4): CPE (modems)

Properties:

• 45/36 Mbps data transfer rate• up to 400 m coverage• Ethernet & USB connection• Configurable via SNMP • Data and VOIP services

Ilevo CPE LR 100

Cost 286 Wroclav 17-18/09/2003 4/27

Devices (2/4): TPE

Properties:

• 45/36 Mbps data transfer rate• up to 400 m coverage• up to 63 CPE’s or IR’s• Ethernet & RS232 connection• Configurable via SNMP • Data and VOIP services

Ilevo CPE LR 1000

Cost 286 Wroclav 17-18/09/2003 5/27

Devices (3/4): Repeater

Properties:

• 45/36 Mbps data transfer rate• up to 400 m coverage• up to 63 client CPE’s • Ethernet & RS232 connection• Configurable via SNMP • Data and VOIP services

Ilevo CPE LR 1100

Cost 286 Wroclav 17-18/09/2003 6/27

Devices (4/4): Common features

• OFDM modulation• max. 768 carrier downstream• max. 512 carrier upstream• Programmable carrier power profile• Continuous channel SNR monitoring • Adaptive bit rate adjustment• 4 frequency bands: 2-4.5 MHz

5.6-8.1 MHz10-12.5 MHz15-17.5 MHz

Based on DS2 technology

Cost 286 Wroclav 17-18/09/2003 7/27

Laboratory (1/4)

•Rack system:

• Four layered vertical rack system with spacing 40 cm

• Rectangular layout, perimeter 30 m each

• 14 winds 4x95+25mm2 AASC cable (420 m full length)

• Both-end access at the measuring room

• Accessible at each corner for connection

Cost 286 Wroclav 17-18/09/2003 8/27

Laboratory (2/4)

Rack system

Corners

Cost 286 Wroclav 17-18/09/2003 9/27

Laboratory (3/4)

Connections

Cost 286 Wroclav 17-18/09/2003 10/27

Laboratory (4/4)

Cost 286 Wroclav 17-18/09/2003 11/27

Source of disturbance

- 3phase fluorescent lamps

- Drill with speed regulator

- Compact fluorescent lamps (1phase)

- Normal incandescent lamps with dimmer

Cost 286 Wroclav 17-18/09/2003 12/27

Measurement Configuration (1)

TPE - Repeater pathCable length: 420 mSignal injection: Phase - NeutralSignal detection: Phase - Neutral

T PE

AN

R e p e a te r

C PET PE

Bac k b one

L1,L2,L3 + N

L3 + NL3 + N

Spec t. anal .

4 2 0 m

Cost 286 Wroclav 17-18/09/2003 13/27


Results:

Upload: 694 kByte/s @ 16 MHzDownload: 418 kByte/s @ 11 MHz

Upload: 285 kByte/s @ 11 MHzDownload: 446 kByte/s @ 16 MHz

Cost 286 Wroclav 17-18/09/2003 14/27


TPE - Repeater - CPE pathCable length: 420 mSignal injection: Phase - NeutralSignal detection: Phase - Neutral

T PE

AN

R e pe a te r

C PET PEC PE

Bac k b one

L1,L2,L3 + N

L3 + NL3 + NL3 + N

Spec t. anal .

4 20 m

L3 + N

Cost 286 Wroclav 17-18/09/2003 15/27


Results:

Upload: 359 kByte/s @ 16/7 MHzDownload: 174 kByte/s @ 11/3 MHz


Cost 286 Wroclav 17-18/09/2003 16/27


TPE - Repeater - CPE pathCable length: 420 + 30 mSignal injection: Phase - PhaseSignal detection: Phase - Neutral

T PE

AN

R epea te r

C PET PEC PE

Bac k b one

L1,L2,L3 + N

L2 + L3L2 + L3L2 + L3

Spec t. anal .

390 m30 m

L3 + N

Cost 286 Wroclav 17-18/09/2003 17/27


Results:



Cost 286 Wroclav 17-18/09/2003 18/27

Some geography

First written record from 1229.

Area: 48,5 km2 (include agricultural) Population: 1200

Cost 286 Wroclav 17-18/09/2003 19/27

Pictures from Bárdudvarnok

Cost 286 Wroclav 17-18/09/2003 20/27

Bárdudvarnok

C PE

C PE

C PE C PE

T PE

4x 95 + 25m m ² AASC

4x 95 + 25m m ² AASC

3x 95 + 35m m ² M L/-30/95 m m ² AASC

3x 95 + 35m m ² M L/-30/95 m m ² AASC

H ous e c onnec tion

20 k V 0.4 k V

R ou te r xD SL

100 m

70 m

160 m 110 m

Cost 286 Wroclav 17-18/09/2003 21/27


T PE

AN

C PE

Bac k b one

Spec t. anal .

C PE C PE

C PE

L3 + N

L1 + N

L2 + NL1 + N

L3 + N

1 2 0m 1 9 0m

1 2 0m

3 0 m

U: 501 kByte/sD: 234 kByte/s

U: 193 kByte/sD: 200 kByte/s U: 230 kByte/s

D: 148 kByte/s

U: 526 kByte/sD: 330 kByte/s

U: 11 MHZD: 16 MHz

Cost 286 Wroclav 17-18/09/2003 22/27

Conclusions

These devices worked well during laboratory tests

The real net behaviour is unknown

More tests are needed, focused especially on capacitor banks for reactive power compensation

Cost 286 Wroclav 17-18/09/2003 23/27

Strange Result

During the tests we have experienced some strange things, and we examined their source

This is not belonging to the normal PLT operation, but it was worthy to investigate them.

Cost 286 Wroclav 17-18/09/2003 24/27

T PE

C PE

AN

Spec t. anal .

AN

Spec t. anal .

3 0 m

3 0 m

4 0 cm

„Wireless” PLT

20dB@ 7MHz25dB@ 16MHZ

30dB@ 3MHz40dB@ 11MHZ

Attenuation

Upload: 340 kByte/s @ 3MHzDownload: 550 kByte/s @ 7MHzUpload: 520 kByte/s @ 11MHzDownload: 766 kByte/s @ 16MHz

Cost 286 Wroclav 17-18/09/2003 25/27

Disturbance of CF lamps (1/2)

Conducted disturbances

AN

Spec t. anal .

C F Lamp

Test with two class of compact fluorescent lamps:

- Low quality (cheap) lamps stopped the communication, although all of them have CE sign

- High quality (more expensive) lamps never produced this effect)

Cost 286 Wroclav 17-18/09/2003 26/27

Disturbance of CF lamps (2/2)

Cost 286 Wroclav 17-18/09/2003 27/27

Thank you for your attention!

Any questions?

Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

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Transcript of Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics