METHOD OF HANDLING LARGE VOLUMES OF SYNCHROPHASOR MEASURMENTS FOR REAL TIME EVENT REPLAY

• US 20110040786A1
• Filed: 08/11/2009
• Published: 02/17/2011
• Est. Priority Date: 08/11/2009
• Status: Active Grant

• Current Assignee: Electric Power Research Institute Incorporated
• Original Assignee: Electric Power Research Institute Incorporated
• Inventors: Zhang, Guorui, Chen, Hongtao
• Granted Patent: US 8,745,007 B2
• Time in Patent Office: Days
• US Class Current: 707/770
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: G06F 16/2219 Large Object storage; Management thereof
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/00 Systems supporting electrical power generation, transmission or distribution
• CPC Class Codes: Y04S 10/22 Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units

Abstract

A method is provided for handling synchrophasor measurements relating to an electrical power system. The method includes: (a) acquiring a plurality of synchrophasor measurements containing data representing at least one power system event; (b) inserting and storing the event related synchrophasor measurements in a database as a partitioned binary large object (BLOB); (c) reading and transferring the synchrophasor measurements related to a user selected current or historical event from the database to a client computer partition by partition; and (d) processing the event data at the client computer on a partition-by-partition basis such that the client computer will be able to start a replay of the event replay as soon as processing of the first partition of the event BLOB data is completed.

Claims

1. A method for handling synchrophasor measurements relating to an electrical power system, comprising:

(a) acquiring a plurality of synchrophasor measurements containing data representing at least one power system event;

(b) inserting and storing the event related synchrophasor measurements in a database as a partitioned binary large object (BLOB);

(c) reading and transferring the synchrophasor measurements related to a user selected event from the database to a client computer partition by partition;

(d) processing the event data at the client computer on a partition-by-partition basis such that the client computer will be able to start a replay of the event replay as soon as processing of the first partition of the event BLOB data is completed.

2. The method of claim 1 wherein the data objects are generated by a plurality of data collection units.

3. The method of claim 2 wherein the data collection units are phasor measurement units which collect synchrophasor data.

4. the method of claim 3 wherein the phasor measurement units are coupled to phasor data concentrators which are in turn coupled to the data server.

5. The method of claim 1 further comprising, at the client computer, creating a visual display of the data contained within the data objects.

6. The method of claim 1 wherein the data is acquired from the data collection units through a first communication channel.

7. The method of claim 5 wherein the first communication channel is a data network.

8. The method of claim 1 wherein the data is transferred to the client computer through a second communication channel.

9. The method of claim 8 wherein the second communication channel is a data network.

10. The method of claim 1 wherein the database is stored on the server.

11. The method of claim 10 further comprising sequentially transferring the partitions of the binary large object to the client computer in the order in which they were inserted into the database.

12. The method of claim 11 further comprising de-serializing the first of the partitions substantially immediately after it is received at the client computer.

13. The method of claim 12 further comprising sequentially de-serializing the partitions as they are received at the client computer in a background process, while the data contained in one or more partitions are being presented in a visual display.