Device and method for controlling high voltage direct current transmission system

• US 9,866,027 B2
• Filed: 01/14/2015
• Issued: 01/09/2018
• Est. Priority Date: 01/23/2014
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Lee, Seung Hun, Kim, Eung Soo, Kim, Jong Bae
• Primary Examiner(s): Merant, Guerrier
• Application Number:
  US14/597,057
• Publication Number:
  US 20150207325A1
• Time in Patent Office: 1,091 Days
• CPC Class Codes: H02J 3/36 Arrangements for transfer of electric power between ac networks via a high-tension dc link
• CPC Class Codes: H02M 5/40 with intermediate conversion into dc
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: Y02E 60/60 Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Abstract

A device for controlling a high voltage direct current (HVDC) transmission system is provided. The device includes: a communication unit communicating with a control device; a control unit obtaining a databack signal received through the communication unit, checking a data line error and a line connection error based on an obtained databack signal, and outputting a valve control signal based on the databack signal; and an output unit outputting the valve control signal to a valve control device based on control of the control unit.

Claims

1. A device for controlling a high voltage direct current (HVDC) transmission system, the device comprising:

a communication unit configured to communicate with a control device;

an output unit configured to output information; and

a control unit configured to;

control the communication unit to obtain a databack signal;

check for a data error based on error data included in the obtained databack signal;

check for a line connection error based on whether the databack signal is obtained; and

control the output unit to output a notification that the data error or the line connection error occurs,

wherein the control unit is further configured to check for the data error and the line connection error together based on a same databack signal.

2. The device according to claim 1, wherein the databack signal comprises N databack groups each comprising M pulse signals.

3. The device according to claim 2, wherein the control unit is further configured to check the databack signal at a specific interval corresponding to a time when the pulse signals are input.

4. The device according to claim 1, wherein the control unit comprises:

a data monitoring unit configured to extract the error data from the obtained databack signal and check for the data error; and

a line monitoring unit configured to check for the line connection error.

5. The device according to claim 4, wherein the data monitoring unit is further configured to:

extract at least one signal indicating that the error data is sensed as high from the obtained databack signal; and

extract the databack signal including the at least one signal as the error data.

6. The device according to claim 5, wherein the data monitoring unit is further configured to extract the databack signal as the error data when a number of the at least one signal is equal to or greater than a reference number.

7. The device according to claim 4, wherein the line monitoring unit is further configured to:

check presence of the databack signal; and

identify a signal line having no databack signal as the line connection.

8. The device according to claim 7, wherein the line monitoring unit is further configured to identify the signal line as the line connection when the databack signal is not input at least a specific number of times.

18. The device according to claim 2, wherein checking for the data error comprises identifying whether data error signals of the M pulse signals are sensed as high.

9. A method of controlling a high voltage direct current (HVDC) transmission system, the method comprising:

obtaining a databack signal from the HVDC transmission system;

checking for a data error based on error data included in the obtained databack signal;

checking for a line connection error based on whether the databack signal is obtained; and

providing a notification that the data error or the line connection error occurs,

wherein checking for the data error and the line connection error is performed together based on a same databack signal.

10. The method according to claim 9, wherein the databack signal comprises N databack groups each comprising M pulse signals.

11. The method according to claim 10, wherein checking for the data error comprises identifying whether data error signals of the M pulse signals are sensed as high.

12. The method according to claim 11, wherein checking for the data error further comprises identifying whether a number of the data error signals sensed as high is equal to or greater than a reference number.

13. The method according to claim 10, wherein checking for the line connection error comprises identifying a line connected to one of the N databack groups as the line connection when no input databack group signal is sensed among the corresponding M pulse signals.

14. The method according to claim 10, further comprising checking the databack signal at a specific interval corresponding to a time when the pulse signals are input.

15. The method according to claim 9, further comprising:

checking presence of the databack signal; and

identifying a signal line having no databack signal as the line connection.

16. The method according to claim 15, further comprising identifying the signal line as the line connection when the databack signal is not input at least a specific number of times.

17. The method according to claim 9, further comprising:

extracting at least one signal indicating that the error data is sensed as high from the obtained databack signal; and

extracting the databack signal including the at least one signal as the error data.