METHOD AND DEVICE FOR EVALUATING AN ELECTRICAL INSTALLATION OF AN ELECTRICAL POWER SYSTEM

• US 20110196627A1
• Filed: 01/26/2011
• Published: 08/11/2011
• Est. Priority Date: 02/05/2010
• Status: Abandoned Application

• Current Assignee: OMICRON electronics GmbH
• Original Assignee: OMICRON electronics GmbH
• Inventors: Marinescu, Cristian, Steinhauser, Fred
• Application Number:
  US13/014,312
• Publication Number:
  US 20110196627A1
• Time in Patent Office: Days
• US Class Current: 702/58
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• 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

Abstract

The present invention relates to a method for evaluating an electrical installation (1981-2211) of an electrical power system (1000, 1600). The electrical installation (1981-2211) comprises a communication network (2111, 2211) for transmitting data. In the method, real-time data transmissions in the communication network (2111, 2211) are detected automatically and the electrical installation (1981-2211) is evaluated automatically on the basis of the detected real-time data transmissions. The behaviour of a sampling unit, of a merging unit or of an SV transmitter (7) is further evaluated automatically on the basis of the detected real-time transmissions.

Claims

1. Method for evaluating an electrical installation of an electrical power system, wherein the electrical installation comprises a communication network for transmitting data, wherein the method comprises:

automatic detection of real-time data transmissions in the communication network, and

automatic evaluation of the electrical installation on the basis of the detected real-time data transmissions.

2. Method according to claim 1, wherein the evaluation of the electrical installation comprises determining missing real-time data transmissions.

3. Method according to claim 1, wherein the real-time data transmissions are in each case detected automatically in at least two different locations of the communication network.

4. Method according to claim 1, wherein time-related information is automatically assigned to each of the detected real-time data transmissions, and

in that the communication network of the electrical installation is evaluated automatically on the basis of the time-related information of the detected real-time data transmissions.

5. Method according to claim 4, wherein the evaluation of the electrical installation comprises determining a statistical distribution of the real-time data transmissions in respect of their time-related information.

6. Method according to claim 4, wherein the evaluation of the electrical installation comprises determining a time interval between successive real-time data transmissions.

7. Method according to claim 1, wherein a sampling unit of the electrical installation forms a real-time sampled value by sampling an electrical parameter of the electrical power system and transmits it as a real-time data transmission via the communication network.

8. Method according to claim 7, wherein the sampling unit comprises a merging unit which is arranged to sample a plurality of real-time sampled values of a plurality of electrical parameters of the electrical power system and to transmit them as a real-time data transmission via the communication network.

9. Method according to claim 8, wherein the merging unit comprises a merging unit according to IEC 61850.

10. Method according to claim 9, wherein the sampling unit, the merging unit or a transmitting device of the sampling unit for transmitting the real-time sampled values is evaluated automatically on the basis of the detected real-time data transmissions.

11. Method according to claim 7, wherein time-related information is automatically assigned to each of the detected real-time data transmissions on leaving the sampling unit, and

wherein the sampling unit of the electrical installation is evaluated automatically on the basis of the time-related information of the detected real-time data transmissions.

12. Method according to claim 7, wherein the transmitted real-time data transmissions are detected by a network access device, wherein the sampling unit and the network access device are synchronised with a time source and the network access device assigns time-related information to each of the real-time data transmissions.

13. Method according to claim 12, comprising the provision of a reference signal which comprises reference time-related information,

wherein the sampling unit samples the reference signal and transmits it as a real-time data transmission via the communication network, and

wherein the electrical installation is evaluated automatically on the basis of a comparison of the reference time-related information with the time-related information of the real-time data transmission.

14. Method according to claim 13, wherein the reference signal comprises a reference value,

wherein the electrical installation is evaluated automatically on the basis of a comparison of real-time sampled values of the real-time data transmission with the reference value.

15. Method according to claim 13, wherein the reference signal is provided by a protection tester, wherein the protection tester simulates an ideal sampling unit, and wherein the protection tester and the sampling unit are synchronised with the time source.

16. Device for evaluating an electrical installation of an electrical power system, wherein the electrical installation comprises a communication network for transmitting data, wherein the device comprises:

a network access device which can be coupled with the communication network and is arranged to detect real-time data transmissions in the communication network, and

an evaluation device which is provided with the real-time data transmissions by the network access device and which is arranged to evaluate the electrical installation on the basis of the real-time data transmissions.

17. Device according to claim 16, wherein the electrical installation further comprises a sampling unit which is arranged to form a real-time sampled value by sampling an electrical parameter of the electrical power system and to transmit it as a real-time data transmission via the communication network.

18. Device according to claim 17, wherein the sampling unit comprises a merging unit which is arranged to sample a plurality of real-time sampled values of a plurality of electrical parameters of the electrical power system and to transmit them as a real-time data transmission via the communication network.

19. Device according to claim 18, wherein the merging unit comprises a merging unit according to IEC 61850.

20. Device according to claim 17, wherein the device further comprises a time source which is arranged to synchronise the sampling unit and the network access device.

21. Device according to claim 20, comprising a protection tester which is arranged to provide a reference signal comprising a reference value with associated reference time-related information,

wherein the sampling unit samples the reference signal and transmits it as a real-time data transmission via the communication network, and

wherein the electrical installation is evaluated automatically on the basis of a comparison of the reference time-related information with the time-related information of the real-time data transmission.

22. Device according to claim 21, wherein the protection tester simulates an ideal sampling unit, wherein the protection tester and the sampling unit are synchronised with the time source.