1. Oliver SCHROEDEL, Michael SCHWAN, Sven KOEPPE, Robert ROSENBERGER
Distribution Automation Solutions – Impact on System Availability in Distribution Networks
Oliver SCHROEDEL, Michael SCHWAN, Sven KOEPPE, Robert ROSENBERGER
Siemens AG - Germany
Michael SCHWAN – Germany – Session 3 – Paper 1117

2. Study Methodology
Analyzing impact of automation concepts on MV distribution networks (Ring / open ring networks; 12, 24 or 84 RMUs per feeder / open ring)
Automation concepts
0 – Reference (manual switching except HV/MV SS)
1 – Remote-controlled open point in ring networks
2 – Remote-monitored short circuit indicators
3 – Remote-controlled disconnectors in sel. RMUs
4 – Autonomous disconnectors in selected RMUs
5/6 – As 3/4 with circuit breakers
Michael SCHWAN – Germany – Session 3 – Paper 1117

3. Study Results – SAIFI
(Ring network 84 RMUs, Concepts applied to all (c’ 0-2) or to 5 (c’ 3 to 6) RMUs)
Michael SCHWAN – Germany – Session 3 – Paper 1117

4. Study Results – SAIDI
(Ring network 84 RMUs, Concepts applied to all (c’ 0-2) or to 5 (c’ 3 to 6) RMUs)
Michael SCHWAN – Germany – Session 3 – Paper 1117

5. Impact of Automation Degree (Ring network 84 RMUs, Selected concepts)
Michael SCHWAN – Germany – Session 3 – Paper 1117

6. Implementation
Michael SCHWAN – Germany – Session 3 – Paper 1117

7. Implementation
“Smart” protection and control systems are available today, comprising (as required)
Intelligent Electronic Devices (IEDs) for secondary distribution, integration into primary distribution control
Two-way communication, based on IEC 61850
Operational functionality
Fault detection
Fault isolation
Remote-controlled switching
Autonomous supply restoration (“self-healing” grid)
Michael SCHWAN – Germany – Session 3 – Paper 1117

8. Conclusion
Pressure for economic solutions to maintain / improve system reliability is increasing
“Smart” distribution automation solutions provide substantial technical and economical benefits
Impact on both SAIDI and SAIFI performance
Depending on automation degree of RMUs, very significant SAIDI / SAIFI reductions are possible
Already low automation degrees deliver high impact
Possible synergies with other smart grid technologies
Michael SCHWAN – Germany – Session 3 – Paper 1117