INTELLIGENT ELECTRIC DEVICE AND NETWORK SYSTEM INCLUDING THE DEVICE

• US 20120137356A1
• Filed: 11/08/2011
• Published: 05/31/2012
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: KIM, Kyung Ho
• Granted Patent: US 9,154,509 B2
• Time in Patent Office: Days
• US Class Current: 726/11
• CPC Class Codes: H04L 63/105 Multiple levels of security

Abstract

A protection relay installed at a power system and a network system including the protection relay are disclosed, the protection relay storing a security level of a plurality of systems or a plurality of source addresses, instructing whether to short-circuit a power by checking a security level of a data-transmitting system based on a security level stored in a security level setting device, or instructing whether to short-circuit a power by comparing the source addresses included in the data with the plurality of source addresses.

Claims

1. A protection relay determining a process of a data received through an Ethernet communication device, the protection relay comprising:

a security level setting device storing a security level of a plurality of systems; and

a user checking device checking the security level of the data-transmitting systems based on the security level stored in the security level setting device to generate a check/instruction signal including information instructing whether to short-circuit a power.

2. The protection relay of claim 1, wherein the data includes information related to monitoring and/or controlling of the protection relay and an upper-level host of the protection relay.

3. The protection relay of claim 1, wherein the security level setting device stores a security level applied from outside, or changes the stored security level based on the security level applied from outside.

4. The protection relay of claim 1, wherein the security level is determined by use or non-use of information on the upper-level host.

5. The protection relay of claim 4, wherein the security level includes a first security level using some pieces of information among the information on the upper-level host;

and a second security level using the information on the upper-level host.

6. The protection relay of claim 5, wherein the first security level uses an IP address and a subnet address of the upper-level host.

7. The protection relay of claim 5, wherein the second security level uses an MAC address of the upper-level host.

8. A protection relay determining a process of a data received through an Ethernet communication device, the protection relay comprising:

a security level setting device storing a security level of a plurality of source addresses; and

a user checking device comparing a security level of the source addresses included in the data with that of the plurality of source addresses stored in the security level setting device to generate a comparison/instruction signal including information instructing whether to short-circuit a power.

9. The protection relay of claim 8, wherein the data includes information related to monitoring and/or controlling of the protection relay and an upper-level host of the protection relay.

10. The protection relay of claim 8, wherein the security level setting device stores a security level applied from outside, or changes the stored security level based on the security level applied from outside.

11. The protection relay of claim 8, wherein the security level is determined by use or non-use of information on the upper-level host.

12. The protection relay of claim 11, wherein the security level includes a first security level using some pieces of information among the information on the upper-level host;

and a second security level using the information on the upper-level host.

13. The protection relay of claim 12, wherein the first security level uses an IP address and a subnet address of the upper-level host.

14. The protection relay of claim 12, wherein the second security level uses an MAC address of the upper-level host.

15. A network system comprising:

an Ethernet communication device; and

at least one protection relay determining a process of a data received through the Ethernet communication device, wherein the at least one protection relay storing a security level of a plurality of systems or a plurality of source addresses, instructing whether to short-circuit a power by checking the security level of the data-transmitting systems based on the security level stored in a security level setting device, or instructing whether to short-circuit a power by comparing the source addresses included in the data with the plurality of source addresses.

16. The network system of claim 15, further comprising at least one of a PLC (Programmable Logic Controller), a measuring instrument and a monitoring device implementing a communication with an upper-level monitoring device via the Ethernet communication device.

17. The network system of claim 15, wherein the data includes information related to monitoring and/or controlling of the protection relay and an upper-level host of the protection relay.