SYSTEM FOR TRANSMITTING AND RECEIVING A POWER LINE COMMUNICATION SIGNAL OVER THE POWER BUS OF A POWER ELECTRONIC CONVERTER

• US 20160277071A1
• Filed: 03/23/2016
• Published: 09/22/2016
• Est. Priority Date: 09/24/2013
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Research Ltd. (ABB Ltd.)
• Inventors: Dzung, Dacfey, Cottet, Didier, Round, Simon Douglas
• Granted Patent: US 10,056,943 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02M 1/0003 Details of control, feedback or regulation circuits
• CPC Class Codes: H02M 1/088 for the simultaneous control of series or parallel connected semiconductor devices
• CPC Class Codes: H02M 5/4585 having a rectifier with controlled elements
• CPC Class Codes: H02M 7/4835 comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
• CPC Class Codes: H03K 17/605 with galvanic isolation between the control circuit and the output circuit H03K17/78 takes precedence
• CPC Class Codes: H03K 17/61 using transformer coupling
• CPC Class Codes: H03K 2217/0081 Power supply means, e.g. to the switch driver
• CPC Class Codes: H04B 2203/5412 by modofying wave form of the power source
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 2203/5491 using filtering and bypassing
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals

Abstract

The present invention is concerned with a system for transmitting and/or receiving the control and sensing signals between the control units and the power electronic components. The system according to the present invention comprises: a transceiver adapted to modulate the communication signal on a communication signal frequency band, and a coupler connected to the power conductor and adapted to couple the modulated communication signal to the power conductor. The present invention also concerns a method for transmitting and receiving the control and sensing signals.

Claims

1. System for transmitting and/or receiving a communication signal via a power conductor of a power electronic converter with a plurality of converter modules, comprising:

a transceiver adapted to modulate the communication signal on a communication signal frequency band, and

a coupler connected to the power conductor and adapted to couple the modulated communication signal to or from the power conductor.

2. System according to claim 1, wherein the coupler comprises a capacitive coupler and/or an inductive coupler.

3. System according to claim 1, wherein the communication signal frequency band is different to the frequency band of the power waveform.

4. System according to claim 3, further comprises:

a high frequency bypass connected in parallel to a power electronic switch of the power electronic converter and adapted to the communication signal frequency band.

10. System according to claim 2, wherein the communication signal frequency band is different to the frequency band of the power waveform.

5. Power electronic converter comprising:

a power conductor;

a plurality of converter modules; and

a plurality of systems connected with the converter modules for transmitting and/or receiving the communication signal via the power conductor, each of the plurality of systems comprises;

a transceiver adapted to modulate the communication signal on a communication signal frequency band; and

a coupler connected to the power conductor and adapted to couple the modulated communication signal to or from the power conductor.

12. System according to claim 5, wherein the coupler comprises a capacitive coupler and/or an inductive coupler.

13. System according to claim 5, wherein the communication signal frequency band is different to the frequency band of the power waveform.

14. System according to claim 5, further comprises:

a high frequency bypass connected in parallel to a power electronic switch of the power electronic converter and adapted to the communication signal frequency band.

6. Method for transmitting and/or receiving a communication signal between a main controller and a local controller of a power electronic converter with a plurality of converter modules, comprising:

modulating the communication signal, by a transceiver, on a communication signal frequency band,

coupling the modulated communication signal, by a coupler, to or from a power conductor of the power electronic converter, and

transmitting or receiving the communication signal via the power conductor of the power electronic converter.

7. Method according to claim 6, wherein the coupler comprises a capacitive coupler and/or an inductive coupler.

8. Method according to claim 6, wherein the communication signal frequency band is different to the frequency band of the power waveform.

9. Method according to the claim 8, further comprises the step of:

connecting a high frequency bypass in parallel to a power electronic switch of the power electronic converter, and

bypassing the communication signal on the communication signal frequency band.

11. Method according to claim 7, wherein the communication signal frequency band is different to the frequency band of the power waveform.