Setting-less Protection: Basic Building Block for CSP

Transcription

1 Setting-less Protection: Basic Building Block for CSP Sakis Meliopoulos, Georgia Tech & Paul Myrda, EPRI March 26,

2 Driving Forces Present Numerical relays, rely on (typically) three currents and three voltages, they are equipped with data acquisition systems and the protective functions require coordination (zone protection centric). End result: complex system with specific limitations: (a) inability to cross check data (detection of bad data, hidden failures) and (b) inability to detect some fault conditions (down conductors, faults near neutrals, etc.) No redundancy lack of ability to validate data & detect hidden failures Consensus: Technology is available to move from zone protection to subsystem (substation) protection. 2

3 Industry Efforts 3

4 CIGRE The Digital Substation (IEC Standards) IEEE Centralized Substation Protection Many Ideas Are Floating Many Different Opinions on CSP 4

5 Here is an advertisement I received this morning. SEL-411L Protects Four Terminals With High-Speed 87L Over Ethernet Would you trust Ethernet (even private) for your protection? Things will be happening. More cyber in protection 5

6 The Digital Substation (2007 Work) From This To This Digital Substation Concept ca

7 The Digital Substation From This To This Present Digital Substation Technology 7

8 The Setting-Less Protection Method 8

9 DSE Based Protection (Setting-less) Setting-less Protection can be viewed as Generalized Differential protection Analytics: Dynamic State Estimation (systematic way to determine observance of physical laws) 9

10 Setting-Less Protection Implementation 10

11 The Setting-Less Relay Basic Building Block 11

12 Integrate Setting-less Into CSP Integrate Protection and State Estimation Perpetual Model Validation Automated Substation State Estimation Automated System Wide State Estimation Removes the Need to Coordinate Protection Functions 12

13 Protection Visualization Enabling Technology GPS Synchronized Measurements Overall Model Flow Substation Automation 13

14 Perpetual Model Validation Protection is Ubiquitous Makes Economic Sense to Use Relays for Distributed Model Data Base Capability of Perpetual Model Validation Component Real Time Model with GPS Time Stamp Enables Distributed Approaches 14

15 Substation State Estimation 15

16 Object Oriented Implementation Centralized Substation Protection 16

17 Instrumentation Verification (Enabled by Centralized Substation Protection) Extremely Important New Capability Supports the Object Oriented Approach Enabling Technology for Implementations Identification of Hidden Failures Blown Fuses Wrong CT Ratio Etc., etc., etc. Handling of Hidden Failures Issue alarms Label data as bad 17

18 Synergetic Activities 18

19 Laboratory Test-Bed for CSP Testing Dedicated Lab for Protection, Control & Cyber Security Testing: Continuous Operation of Fully Automated Substation: (a) It is available to Multiple GaTech Research Groups and (b) Produce young power engineers versed in modern substation automation technologies Configuration is a full replica of the IT infrastructure of a modern substation with multi-vendor equipment It is driven by a high fidelity simulator capable of reproducing real life conditions Unique capability for simultaneous testing of protection, control and cyber security 19

20 Conceptual Implementation on a 765/345/13.8 kv Autobank MARCY Selected Hardware 20

21 Conceptual Implementation on a 765 kv Line MASSENA MARCY Selected Hardware 21

22 Technology Assessment Initial Investment Earlier Studies indicate huge savings in cost for new substations Life Cycle Expected economic life Minimization of Updates Cost Initiate Study to assess cost/benefit (EPRI) 22

23 Τέλος 23