REMOTE COMMUNICATION SYSTEM AND METHOD

• US 20110276839A1
• Filed: 04/25/2011
• Published: 11/10/2011
• Est. Priority Date: 05/07/2010
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: LEE, Byung Jin
• Granted Patent: US 8,578,212 B2
• Time in Patent Office: Days
• US Class Current: 714/47.1
• CPC Class Codes: H02H 1/0061 concerning transmission of signals transmission of measured quantities or switching orders; sectionalised protection involving signal transmission between at least two stations H02H7/261; comparison of the voltage or current values at two spaced portions of a single system H02H3/28; transferring the output of a sensing member to another variable G01D5/00; electrical measuring arrangements using modulation of electromagnetic waves, e.g. light beams G01R15/24, G01R15/26
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 43/0823 Errors, e.g. transmission errors
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: Y04S 40/00 Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them

Abstract

Disclosed is a remote communication system and method. A remote communication system includes a digital protection relay and a remote monitoring system. The digital protection relay stores and maintains fault indices for identifying a predetermined number of faults that have occurred, fault time tags corresponding to the fault indices and fault data corresponding to the fault indices. The remote monitoring system sets a fault index, a fault time tag, a fault data block size to be communicated at a time and a fault data block index for specifying a fault data block to be communicated, and requests the digital protection relay of a fault data block.

Claims

1. A remote communication system, the system comprising:

a digital protection relay configured to store and maintain fault indices for identifying a predetermined number of faults that have occurred, fault time tags corresponding to the fault indices and fault data corresponding to the fault indices; and

a remote monitoring system configured to set a fault index, a fault time tag, a fault data block size to be communicated at a time and a fault data block index for specifying a fault data block to be communicated, and to request the digital protection relay of the fault data block.

2. The system of claim 1, wherein the digital protection relay transmits the corresponding fault data block to the remote monitoring system, based on the fault index, the fault time tag, the fault data block size and the fault data block index, received from the remote monitoring system.

3. The system of claim 1, wherein the remote monitoring system requests the digital protection relay of the fault data block until the entire fault data are substantially received, and the digital protection relay transmits the corresponding fault data block to the remote monitoring system based on the request of the remote monitoring system.

4. The system of claim 1, wherein the fault index, the fault time tag, the fault data block size and the fault data block index are set in a user-defined area of a communication frame that the remote monitoring system transmits to the digital protection relay.

5. The system of claim 1, wherein, when an additional fault occurs, the digital protection relay delete fault data related to the oldest fault index.

6. The system of claim 1, wherein the fault data block index specifies which fault data block is to be communicated.

7. A remote communication method of performing communications between a digital protection relay and a remote monitoring system, the method comprising:

(a) storing fault indices for identifying a predetermined number of faults that have occurred, fault time tags corresponding to the fault indices and fault data corresponding to the fault indices;

(b) receiving a request for specific fault data from the remote monitoring system; and

(c) transmitting a corresponding fault data block to the remote monitoring system based on a fault index, a fault time tag, a fault data block size and a fault data block index, received from the remote monitoring system, among the stored fault data.

8. The method of claim 7, further comprising,

(d) repeatedly performing the steps (b) and (c) until the fault data block for the entire fault data is transmitted to the remote monitoring system.

9. The method of claim 7, wherein the request received from the remote monitoring system includes a fault index, a fault time tag, a fault data block size and a fault data block index, and the fault index, the fault time tag, the fault data block size and the fault data block index are set in a user-defined area of a communication frame that the remote monitoring systems transmits to the digital protection relay.

10. The method of claim 7, further comprising,

(e) removing fault data related to the oldest fault index when an additional fault occurs.

11. A remote communication method of performing communications between a digital protection relay and a remote monitoring system, the method comprising:

(a) setting a fault index, a fault time tag, a fault data block size to be communicated at a time and a fault data block index for specifying a fault data block to be communicated, and requesting the digital protection relay of a fault data block; and

(b) receiving the fault data block from the digital protection relay.

12. The method of claim 11, further comprising,

(c) repeatedly performing the steps (a) and (b) until the fault data block for the entire fault data is received from the digital protection relay.

13. The method of claim 11, wherein the fault index, the fault time tag, the fault data block size and the fault data block index are set in a user-defined area of a communication frame that the remote monitoring systems transmits to the digital protection relay.

14. The method of claim 11, further comprising,

(d) requesting the digital protection relay to identify whether or not the corresponding fault data exist.