SYSTEMS AND METHODS FOR CONTROLLING COMMUNICATION OVER A POWER DISTRIBUTION NETWORK

• US 20110102159A1
• Filed: 10/29/2009
• Published: 05/05/2011
• Est. Priority Date: 10/29/2009
• Status: Active Grant

• Current Assignee: Landis+Gyr Inc. (Landis+Gyr Group AG)
• Original Assignee: Landis+Gyr Inc. (Landis+Gyr Group AG)
• Inventors: Olson, Verne Jon, Glende, James Hilmer, Schroeder, Michael Lloyd
• Granted Patent: US 8,416,069 B2
• Time in Patent Office: Days
• US Class Current: 340/12.32
• CPC Class Codes: H04B 2203/5495 having measurements and testing channel
• CPC Class Codes: H04B 3/544 Setting up communications; Call and signalling arrangements

Abstract

An embodiment of a communication system can control transmission of a data signal to a power distribution network based on signal data measured from the power distribution network. The signal data may represent an amount of crosstalk or an amount of noise experienced on the power distribution network. The signal data and an identification of at least one active power line coupler unit can be used to determine an adjustment to one or more power line coupler units. A control signal that represents the adjustment can be used to adjust the power line coupler units.

Claims

1. A system comprising:

a signal measurement device capable of measuring signal data from a power distribution network;

a control device in communication with the signal measurement device, the control device being capable of using an identification of at least one active power line coupler unit and the signal data measured by the signal measurement device to determine an adjustment to a functional characteristic of the at least one active power line coupler unit, the at least one active power line coupler unit being configured to transmit a signal onto the power distribution network; and

a control board disposed in the at least one active power line coupler unit, the control board being capable of controlling the functional characteristic of the at least one active power line coupler unit in response to the adjustment.

2. The system of claim 1, further comprising:

an amplifier disposed in the at least one active power line coupler unit, the functional characteristic comprising an amount by which the amplifier is configured to amplify a data signal, the data signal being amplified for transmission onto the power distribution network, the amount being controllable by the control board based on a control signal representing the adjustment.

3. The system of claim 2, wherein the control board comprises:

a programmable logic device configured to receive a control signal representing the adjustment to the functional characteristic as determined by the control device and to receive the data signal to be provided to the power distribution network;

a digital-to-analog converter in communication with the programmable logic device, the digital-to-analog converter being configured to convert the control signal to an analog signal;

a regulating pulse width modulator in communication with the digital-to-analog converter, the regulating pulse width modulator being configured to generate a pulse width modulated signal from the analog signal; and

an amplifier driver in communication with the regulating pulse width modulator, the amplifier driver being configured to output a driver signal in response to the pulse width modulated signal,

wherein the amplifier is in communication with the programmable logic device and the amplifier driver,

wherein the amount of amplification of the data signal by the amplifier is controllable by the driver signal.

4. The system of claim 1, wherein the signal measurement device is disposed in a substation processing unit,

wherein the control board is disposed in the at least one active power line coupler unit.

5. The system of claim 4, wherein the signal measurement device and the at least one power line coupler unit are disposed in a power distribution substation in the power distribution network.

6. The system of claim 5, wherein the control device is disposed in the power distribution substation.

7. The system of claim 1, wherein the signal measurement device is capable of measuring signal data from the power distribution network by:

transforming a substation bus voltage to a power waveform having a lower voltage than the substation bus voltage; and

obtaining samples as signal data from the power waveform.

8. The system of claim 1, wherein the control device is capable of using an identification of at least one active power line coupler unit and the signal data measured by the signal measurement device to determine an adjustment to the at least one active power line coupler unit by at least one of:

determining the adjustment to the functional characteristic of the at least one active power line coupler unit comprises reducing crosstalk if crosstalk in the signal data is above a threshold; and

determining the adjustment to the functional characteristic of the at least one active power line coupler unit comprises increasing signal strength of a data signal transmitted onto a power distribution network if the signal data represents a signal strength that is below a signal strength threshold.

9. A method comprising:

measuring, by a signal measurement device, signal data from a power distribution network;

receiving an identification of at least one active power line coupler unit, the at least one active power line coupler unit transmitting a signal onto the power distribution network;

analyzing, by a control device, the signal data and the identification of the at least one active power line coupler unit to determine an adjustment to an amount of amplification of a data signal by an amplifier in the at least one active power line coupler unit;

generating a control signal representing the adjustment to the amount of amplification by the amplifier in the at least one active power line coupler unit; and

modifying, by a control board, an amplification amount of the amplifier in the at least one active power line coupler unit in accordance with the control signal.

10. The method of claim 9, wherein measuring, by the signal measurement device, signal data from the power distribution network comprises:

transforming a substation bus voltage to a power waveform, the substation bus voltage being related to a voltage of the power distribution network; and

obtaining samples as signal data from the power waveform.

11. The method of claim 10, wherein the power waveform comprises a voltage that is lower than the substation bus voltage.

12. The method of claim 9, wherein analyzing, by the control device, the signal data and the identification of the at least one active power line coupler unit to determine the adjustment to the amplifier in the at least one active power line coupler unit comprises:

determining the adjustment to the amplifier in the at least one active power line coupler unit comprises decreasing an amplification amount for the amplifier if crosstalk in the signal data is above a threshold.

13. The method of claim 9, wherein analyzing, by the control device, the signal data and the identification of the at least one active power line coupler unit to determine the adjustment to the amplifier in the at least one active power line coupler unit comprises:

determining the adjustment to the amplifier in the at least one active power line coupler unit comprises increasing an amplification amount for the amplifier if the signal data represents a signal strength that is below a signal strength threshold.

14. The method of claim 9, wherein modifying, by the control board, the amplification amount of the amplifier in the at least one active power line coupler unit in accordance with the control signal comprises:

converting the control signal to an analog signal;

generating a pulse width modulated signal based on the analog signal;

providing an amplifier driver signal in response to the pulse width modulated signal; and

using the amplifier driver signal to modify the amplification amount of the amplifier.

15. The method of claim 9, further comprising:

amplifying a data signal by the amplification amount as modified by the control board; and

transmitting the data signal onto the power distribution network, the data signal being capable of being recovered from the power distribution network by an endpoint device.

16. A communication system capable of being in communication with a power distribution network and of being disposed in a power distribution substation, the communication system comprising:

an amplifier configured to amplify a data signal by an amplification amount, the data signal being configured to be transmitted onto the power distribution network;

a signal measurement device configured to measure signal data from the power distribution network; and

a control board in communication with the amplifier, the control board being configured to control the amplification amount based on an adjustment to the amplification amount determined from the signal data.

17. The communication system of claim 16, further comprising:

a control device in communication with the signal measurement device, the control device being configured to determine the adjustment to the amplification amount based on the signal data.

18. The communication system of claim 17, wherein the control device is configured to determine the adjustment to the amplification amount based on the signal data by at least one of:

determining the adjustment to the amplification amount comprises decreasing the amplification amount if crosstalk in the signal data is above a threshold; and

determining the adjustment to the amplification amount comprises increasing the amplification amount if the signal data represents a signal strength that is below a signal strength threshold.

19. The communication system of claim 16, wherein the control board comprises:

a programmable logic device in communication with the amplifier, the programmable logic device being configured to;

receive a control signal representing the adjustment to the amplification amount from the signal data;

receive the data signal to be provided to the power distribution network;

provide the data signal to the amplifier; and

provide the control signal to a digital-to-analog converter;

the digital-to-analog converter in communication with the programmable logic device, the digital-to-analog converter being configured to convert the control signal to an analog signal;

a regulating pulse width modulator in communication with the digital-to-analog converter, the regulating pulse width modulator being configured to generate a pulse width modulated signal from the analog signal; and

an amplifier driver in communication with the regulating pulse width modulator and the amplifier, the amplifier driver being configured to output a driver signal in response to the pulse width modulated signal, the driver signal being provided to the amplifier for controlling the amplification amount.

20. The communication system of claim 16, wherein the signal measurement device is configured to measure signal data from the power distribution network by:

transforming a substation bus voltage to a power waveform, the substation bus voltage being related to a voltage of the power distribution network; and

obtaining samples as signal data from the power waveform.