DEVICE AND METHOD FOR CONTROLLING HIGH VOLTAGE DIRECT CURRENT TRANSMISSION SYSTEM

• US 20150207325A1
• Filed: 01/14/2015
• Published: 07/23/2015
• Est. Priority Date: 01/23/2014
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: KIM, Jong Bae, LEE, Seung Hun, KIM, Eung Soo
• Granted Patent: US 9,866,027 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 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.

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

3. The device according to claim 2, wherein the control unit checks the databack signal at a certain interval corresponding to a time when the pulse signal is input.

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

a data monitoring unit monitoring a data error from the obtained databack signal and extracting error data; and

a line monitoring unit monitoring a line connection error from the obtained databack signal and extracting a line connection error.

5. The device according to claim 4, wherein the data monitoring unit extracts a signal that error data included in the databack signal is sensed as high, and extracts a databack signal including a corresponding signal as error data.

6. The device according to claim 4, wherein the data monitoring unit extracts a corresponding databack signal as error data when a number of signals sensed as high is equal to or larger than a reference number.

7. The device according to claim 4, wherein the line monitoring unit checks presence and absence of an input of the databack signal, and identifies a signal line having no databack signal as a line connection.

8. The device according to claim 7, wherein the line monitoring unit identifies a corresponding line as a connection when the databack signal is not input a certain number of times or more.

9. The device according to claim 1, wherein the control unit checks and extracts presence and absence of a data error and line connection together based on the obtained databack signal.

10. A method of controlling a HVDC transmission system, the method comprising:

checking a data error and a line connection error depending on presence and absence of an error data output of the databack signal and on presence and absence of an input of the databack signal based on an obtained databack signal; and

notifying that the data error or line connection error is sensed.

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

12. The method according to claim 11, wherein checking the data error based on the databack signal comprises identifying a corresponding databack signal as a data error when data error signals of the M pulse signals are sensed as high.

13. The method according to claim 12, wherein checking the data error comprises identifying as a data error when a number of error signals sensed as high is equal to or larger than a reference number.

14. The method according to claim 11, wherein checking the line connection error comprises identifying a line connected to a corresponding databack group as a connection when no input databack group signal among the M data back group signals is sensed.