Local monitoring apparatus, monitoring system and method of digital protective relay

• US 9,312,727 B2
• Filed: 06/20/2012
• Issued: 04/12/2016
• Est. Priority Date: 06/24/2011
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Lee, Byung Jin
• Primary Examiner(s): Bui, Bryan
• Application Number:
  US13/528,654
• Publication Number:
  US 20120330587A1
• Time in Patent Office: 1,392 Days
• Field of Search: 702/62
• US Class Current: 1/1
• CPC Class Codes: H02H 3/08 responsive to excess current responsive to abnormal temperature caused by excess current H02H5/04
• CPC Class Codes: H02H 3/33 using summation current transformers H02H3/347 takes precedence
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00006 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/0004 involved in a protection system
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02P 80/14 District level solutions, i.e. local energy networks
• CPC Class Codes: Y04S 40/12 characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses

Abstract

A local monitoring apparatus, a power distribution monitoring system of a digital protective relay, and a method using the same are disclosed herein. According to the embodiments of the present disclosure, a power distribution monitoring system of the digital protective relay may be configured with a local monitoring program and a self function of the digital protective relay, thereby reducing a cost burden due to the installation of a remote monitoring system. It may be connected to one or more digital protective relays through a remote monitoring connection line to transmit and receive data using a local monitoring dedicated protocol, thereby easily processing various data contained in the digital protective relay. Furthermore, according to the present disclosure, various setting values required for a plurality of digital protective relays, respectively, may be accessed and downloaded once, thereby enhancing the user'"'"'s convenience and increasing management efficiency.

Claims

1. A power distribution monitoring system of a digital protective relay, the system comprising:

one or more digital protective relays provided with one or more remote monitoring ports connected via a remote monitoring connection line, the one or more digital protective relays configured to collect data related to events and generate monitoring data based on the events;

a local monitoring apparatus provided with a local monitoring program and connected to the one or more digital protective relays via the remote monitoring connection line to receive the monitoring data using a local monitoring dedicated protocol; and

a remote monitoring apparatus connected via the remote monitoring connection line to receive the monitoring data from the one or more digital protective relays using a remote monitoring dedicated protocol, wherein

the one or more digital protective relays comprise;

a communication module configured to transmit the monitoring data and receive control data and

a control module configured to determine a communication protocol of the monitoring data, and process the control data using the local monitoring dedicated protocol or the remote monitoring dedicated protocol according to a result of the determination.

2. The system of claim 1, wherein the remote monitoring dedicated protocol is MODBUS or DNP.

3. The system of claim 1, wherein the remote monitoring connection line is a serial communication line or Ethernet communication line.

4. The system of claim 1, wherein the local monitoring apparatus comprises:

a storage unit configured to store the local monitoring program;

a communication unit connected to the one or more digital protective relays and configured to transmit control data to, or receive monitoring data from the one or more digital protective relays; and

a controller configured to execute the local monitoring program.