Communication system and operating method thereof

• US 10,203,675 B2
• Filed: 12/03/2015
• Issued: 02/12/2019
• Est. Priority Date: 04/17/2015
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Kim, Young In, Bae, Ae Kyoung, Kim, Hong Joo, Cho, Yoon Sung
• Primary Examiner(s): Ortiz Rodriguez, Carlos R
• Application Number:
  US14/958,762
• Publication Number:
  US 20160306331A1
• Time in Patent Office: 1,167 Days
• Field of Search: None
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/24215 Scada supervisory control and data acquisition
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: H02J 13/00009 using pulsed signals
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

A communication system includes a first remote terminal unit (RTU) outputting first RTU data, a second RTU outputting second RTU data, and a remote control center applying a first RTU weight, which is a weight for the first RTU, to the output first RTU data and a second RTU weight, which is a weight for the second RTU, to the output second RTU data, and generating state estimation information for the first and second RTUs on the basis of the first and second RTU data to which each of the first and second RTU weights are applied.

Claims

1. A supervisory control and data acquisition (SCADA) system comprising:

a plurality of remote terminal units (RTUs) outputting a plurality of pieces of RTU data with a data quality information on each of the plurality of pieces of RTU data, wherein the RTUs are selected from the group consisting of a transformer, a generator, and a load device; and

a remote control center (RCC) generating a state estimation information on lines respectively connected to the plurality of RTUs,

wherein the RCC is configured to

apply a weight for each of the plurality of RTUs to each of the plurality of pieces of RTU data,

change the weights on a basis of the data quality information,

generate the state estimation information on lines respectively connected to the plurality of RTUs on a basis of the plurality of pieces of RTU data to which the weights are respectively applied, and

control the plurality of RTUs on a basis of the state estimation information.

2. The SCADA system according to claim 1, wherein the RCC performs a calculation for multiplying the weight for each of the plurality of RTUs by the plurality of pieces of RTU data.

3. The SCADA system according to claim 1, wherein the RCC lowers the weights applied to corresponding RTUs, when erroneous signals are output in excess of a preset ratio as a result of determination based on the data quality information on at least one or more of the RTUs among the plurality of RTUs.

4. The SCADA system according to claim 1, wherein the RCC lowers the weights applied to a corresponding period where erroneous signals occur, when the erroneous signals are output in excess of a preset ratio as a result of a determination based on the data quality information on at least one or more of the RTUs among the plurality of RTUs.

5. The SCADA system according to claim 1, wherein the RCC changes the weight for each of the plurality of RTUs such that RTU data, which is most recently output, is least reflected based on the data quality information.

6. An operating method of a supervisory control and data acquisition system, the operating method comprising:

outputting a plurality of pieces of remote terminal unit (RTU) data with a data quality information on each of the plurality of pieces of RTU data;

applying a weight for each of a plurality of RTUs to each of the plurality of pieces of RTU data, wherein the RTUs are selected from the group consisting of a transformer, a generator, and a load device;

changing the weights on a basis of the data quality information;

generating a state estimation information on lines respectively connected to the plurality of RTUs on a basis of the plurality of pieces of RTU data to which the weights are respectively applied, and

controlling the plurality of RTUs on a basis of the state estimation information.

7. The operating method according to claim 6, wherein a calculation is performed by respectively multiplying the weights for the plurality of RTUs by the plurality of pieces of RTU data.

8. The operating method according to claim 6, wherein the weights applied to corresponding RTUs are lowered, when erroneous signals are output in excess of a preset ratio as a result of a determination based on the data quality information on at least one or more of the RTUs among the plurality of RTUs.

9. The operating method according to claim 6, wherein the weights, which are applied to a corresponding period where erroneous signals occur, are lowered, when the erroneous signals are output in excess of a preset ratio as a result of a determination based on the data quality information on at least one or more of the RTUs among the plurality of RTUs.

10. The operating method according to claim 6, wherein a weight for each of the plurality of RTUs is lowered such that RTU data, which is most recently output, is least reflected based on the data quality information.