Quality Regulation in German Distribution Networks New Impulse for Live Working

Transcription

1 Foto: dpa Quality Regulation in German Distribution Networks New Impulse for Live Working 11th International Conference on Live Maintenance, May 2014, Budapest Klaus Dütsch, Bayernwerk AG, Germany

2 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

3 E.ON Distribution Network Operators in Germany 3

4 Bayernwerk an Overview 380/220 kv Transmission Distribution Bayernwerk AG 110 kv 20 kv 230/400 V Small Industry Agriculture Households Industry, Regional Suppliers Key Figures Substations 110/20 kv 283 MV-Network (20 kv) km (55 % Cable) Substations 20/0,4 kv LV-Network (0,4 kv) km (94 % Cable)

5 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

6 Why Quality Regulation? Poland Estonia Czech Republic Hungary Lithuania Portugal Slovenia Ireland Italy France Norway Spain Sweden United Kingdom Austria Finland Germany Netherlands SAIDI+ASIDI in European Countries *) min Governmental Target: low costs for network use Incentive Regulation Possible Effects: reduced opex/capex reduced quality of supply Regulatory Target: maintain quality of supply Quality Regulation *) Council of European Energy Regulators (CEER): 5TH CEER BENCHMARKING REPORT ON THE QUALITY OF ELECTRICITY SUPPLY, 2011, data from figures 2.11 and 2.12

7 Principles of Quality Regulation in Germany Legal Base German Ordinance for Incentive Regulation (Anreizregulierungsverordnung ARegV) sets rules for quality requirements in quality element (Q-Element) in the regulation formula 20 determination of quality element German Regulator Bundesnetzagentur (BNA) Introduction of Quality-Element Electricity Affected Companies Network operators with network customers or more

8 Definitions and Quality Key Figures Reliability of Supply Reliability of Supply describes the ability of the network to transport energy, possibly free of interruption and meeting the product quality Key figues for the determination of the Reliability of Supply ( 20 ARegV): Duration of supply interruption T U (CAIDI) in mintues Frequency of supply interruption H U (SAIFI) in numbers/year Non-delivered energy in MWh Non-covered electric load in MM Non-availability Q U (SAIDI/ASIDI): Q U = H U x T U in minutes/year

9 Which Incidents are Relevant? Interruption of supply of network-customers and distributors Incidents in medium- and low voltage networks Incidents are differentiated between planned and unplanned events: Unplanned Interruption Planned Interruptions *) Atmospheric influences Third-party involvement Electricity network operator error Incidents not recorded Force majeure Interruptions of a duration less than 3 minutes Failures originating from other networks Electric meter exchange Repair and maintenance work Construction/decommissioning Cutoff for third-parties *) planned interruptions are weighted with 50 %

10 Quality Regulation as Part of Incentive Regulation Q-Element with Bonus-/Malus influence on Revue Cap SAIDI = Nonavailability [min/a] Revenue-neutral across all network operators participating Capping at 4% Monetising: 0,19 /min/customer/a Revenue Cap Formula

11 Effects of Quality Improvements Example Verbesserung SAIDI RC RC averaging over 3 years influence on revenues with offset of 3 6 years planned interruptions are weigthed 50 % Example: 1 min improvement of SAIDI in 2011 effects RC 2014, 2015 and 2016

12 First Results of Quality Regulation in Germany Anzahl Netzbetreiber (NB) Number of Network Operators Malus/Bonus in 202 network operators (NO) involved bonus: 143 NO, maximal 4,7 Mio. malus: 59 NO, maximal 4,1 Mio. Source: BNA-Monitoring-report 2012

13 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

14 Live Working at Bayernwerk 20 kv-overhead Lines 20 kv-substations Low Voltage AuS-MS-Übersicht / Dütsch

15 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

16 Low Voltage Live Work Cable- Branching Joints Cable- Connection Joints Cable- End Sealings Overhead Lines- Covering Conductors Switchgear- Changing of Switching-bars Switchgear- Connecting/Disconnecting Deenergized Cable Switchgear- Connecting/Disconnecting of Live Cables total: ca works/year 0% 10% 20% 30%

17 Cost Comparison: LV-Branch Joint Q-Element Carding, Switching 200 Avoided efford Interruption of supply: 10 housholds duration: 1,5 h carding/switching: 1,5 h Contractor Costs Contractor Costs 0 0 De-energized work with disruption of supply Live Working

18 Practical example change of switching cabinet cut-off: 95 customers time: 8:30 12:05 substation Station costs of Q-element: Interruption could be reduced by better coordination, could be almost completely avoided by Live Working

19 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

20 Medium Voltage Rubber Glove Method

21 Work Statistic number/year Flying Sections Bird Protection Woodpole Change Pininsulator Tension Insulator Conductor Repair Suspension Insulator Other

22 Cost Comparison MV Flying Section Q-Element Standby- Generator Switching, Carding Contractor- Costs Switching Pre-vetting, Preparation, Driving Live work Avoided effort *) stubstations affected: 3,4 standby generators needed: 1,6 substations disrupted: 1,7 disruption time: 4,2 h tranformer size: 200 kva standby generator size: 250 kva single use of Flying Section De-energized Work Opening Jumpers on Branch-Pole Live Working Flying Section *) Figures based on average values from /2013 (ca projects)

23 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

24 Live Work in Transformer Substations (20/0.4 kv) Distance Method Examples Dry cleaning Wet cleaning Oil-refilling of end-sealings Mounting of sign-plates

25 Cost comparison Q-Element 1000 Standby Generator 1000 Avoided effort transformer: 400 kva standby generator: 250 kva disruption time: 2,5 h 500 Carding, Switching Contractor Costs 500 Carding Contractor Costs 500 Preparation, Driving Live work De-energized Work with Interruption of Supply De-energized Work with Standby-Generator Live Working

26 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

27 Total Influence on Non-Availability (SAIDI/ASIDI) Bayernwerk: Δ SAIDI/ASIDI AuS -11 min/a MV Overhead Lines (42 %) Low Voltage (55 %) MV Substations (3 %)

28 Non-Availability: Reference and Actual Values Example: Bayernwerk AG *) 0,4 kv reference 0,4 kv actual SAIDI/ASIDI avoided by Live Work 20 kv reference 20 kv actual Q U / min/a without Live Work reference values can not be met *) BNetzA: SAIDI/ASIDI-publication 2012, reference values 2012 and medium values for E.ON Bayern

29 Content 1. Introduction 2. Basics of Quality Regulation in Germany 3. Influence on Live Working a. Low Voltage b. Medium Voltage Overhead Lines c. Medium Voltage Transformer Substations 4. Results 5. Conclusion

30 Conclusion Live Working in low and medium voltage networks is a safe and well proven method for reducing planned interruptions of supply Without considering the costs of avoided interruptions, live work was costeffective in many cases already in the past With the introduction of Quality Regulation in Germany in the year 2012, Live Working has become even more interesting, because it is an important tool for meeting the quality goals set by the regulators

31 Thank you for your attention! Klaus Dütsch Bayernwerk AG Arbeiten unter Spannung / Live Working / klaus.duetsch@bayernwerk.de

32 Backup

33 Regulation How it works in detail Source: E.ON SE: Charts Investor Relations: E.ON s European distribution business Powering the energy system transformation, Business Deep Dive Distribution in London,

34 Regulation Formula Source: E.ON SE: Charts Investor Relations: E.ON s European distribution business Powering the energy system transformation, Business Deep Dive Distribution in London,