Communication system and operating method thereof

• US 10,444,736 B2
• Filed: 12/15/2015
• Issued: 10/15/2019
• 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): Cao, Chun
• Application Number:
  US14/970,371
• Publication Number:
  US 20160306342A1
• Time in Patent Office: 1,400 Days
• Field of Search: 700 9
• CPC Class Codes: G05B 19/414 Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
• CPC Class Codes: G05B 2219/32404 Scada supervisory control and data acquisition
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: G08C 2201/51 Remote controlling of devices based on replies, status thereof
• 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 is provided. The communication system includes a communication device receiving a state signal from at least one remote terminal unit (RTU), generating signal quality data for the state signal, and transmitting, to a control device, the generated signal quality data and the received state signal. The control device generates state estimation data for each of the at least one RTU on a basis of the state signal received from the communication device, corrects the signal quality data transmitted from the communication device according to at least one preset condition, and changes the generated state estimation data on a basis of the corrected signal quality data and the received state signal.

Claims

1. A communication system comprising:

a communication device receiving a state signal from at least one remote terminal unit (RTU), generating signal quality data for the state signal, and transmitting, to a control device, the signal quality data and the state signal, wherein the signal quality data indicates whether the state signal is normal or erroneous; and

the control device receiving the signal quality data and the state signal from the communication device, generating a first state estimation data for each of the at least one RTU on a basis of the state signal received from the communication device, correcting the signal quality data transmitted from the communication device according to at least one preset condition, changing the first state estimation data on a basis of the corrected signal quality data and the received state signal to generate a second state estimation data, and generating an analysis information of the at least one RTU based on the second state estimation data,

wherein, when the corrected signal quality data indicates that a corresponding state signal is erroneous, the corresponding state signal is not used for generation of the analysis information.

2. The communication system according to claim 1, wherein the condition comprises a case where measurement data of the state signal is not determined to be 0 in a state where the state estimation data is 0.

3. The communication system according to claim 1, wherein the condition comprises a case where measurement data of the state signal is determined to be 0 in a state where the first state estimation data is not 0.

4. The communication system according to claim 1, wherein the condition comprises a case where a first data amount received by the control device from the communication device is not the same as a second data amount output from the control device to the communication device.

5. The communication system according to claim 4, wherein the condition further comprises a case where the first data amount and the second data amount have a difference by a preset data amount or more in a state where a loss occurs in the first and second data amounts.

6. The communication system according to claim 1, where at least one line is disposed between each of the at least one RTU and the communication device, and

the condition comprises a case where each impedance value of the at least one line is different from each other.

7. The communication system according to claim 1, wherein each of the at least one RTU comprises a circuit breaker that connects or disconnects each of the at least one RTU to or from the communication device according to whether the circuit breaker is to be open or closed,

the condition comprises a case where a specific RTU is determined to be disconnected from the communication device in a state where the circuit breaker of the at least one RTU is connected, and

the control device changes the first state estimation data for the specific RTU.

8. The communication system according to claim 1, wherein each of the at least one RTU comprises a circuit breaker that connects or disconnects each of the at least one RTU to or from the communication device according to whether the circuit breaker is to be open or closed,

the condition comprises a case where a specific RTU is determined to be connected to the communication device in a state where the circuit breaker of the at least one RTU is open, and

the control device changes the first state estimation data for the specific RTU.

9. The communication system according to claim 1, wherein each of the at least one RTU comprises a connected or opened circuit breaker and a DC on-off switch, and

the condition comprises a case where a connected or open state of the circuit breaker comprised in a specific RTU is different from that of the DC on-off switch comprised in the specific RTU.

10. An operating method of a communication system, the operating method comprising:

receiving, by a communication device, a state signal from at least one RTU;

generating, by the communication device, signal quality data for the state signal, wherein the signal quality data indicates whether the state signal is normal or erroneous;

receiving, by a control device, the signal quality data and the state signal from the communication device;

generating a first state estimation data for each of the at least one RTU on a basis of the state signal;

correcting the signal quality data according to at least one preset condition;

changing the first state estimation data on a basis of the corrected signal quality data and the received state signal to generate a second state estimation data; and

generating an analysis information on the at least one RTU on the basis of the second state estimation data,

wherein, when the corrected signal quality data indicates that a corresponding state signal is erroneous, the corresponding state signal is not used for generation of the analysis information.

11. The operating method according to claim 10, wherein the condition comprises a case where measurement data of the state signal is not determined to be 0 in a state where the first state estimation data is 0.

12. The operating method according to claim 10, wherein the condition comprises a case where measurement data of the state signal is determined to be 0 in a state where the first state estimation data is not 0.

13. The operating method according to claim 10, wherein the condition comprises a case where a first data amount received by the control device from the communication device is not the same as a second data amount output from the control device to the communication device.

14. The operating method according to claim 13, wherein the condition further comprises a case where the first data amount and the second data amount are different by a preset data amount or more in a state where a loss occurs in the first and second data amounts.