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