Lifetime extension of high voltage products. Enrico Adler Customer Service for HV products

Transcription

1 Lifetime extension of high voltage products Enrico Adler Customer Service for HV products Unrestricted Siemens AG Österreich 2017 siemens.at/future-of-energy

2 Agenda Overview GIS products Operation- and Service experience Maintenance strategy Outlook for continued service Summary Page 2

3 Siemens Highvoltage - GIS Product families 1968 up to date (simplyfied overview) U in kv Phased out from serial production Single production upon request Current Product portfolio 420/ D.1 (vh 930) 52 8D D.5 8DQ1 8DQ1 8D.4 8DP3-Q2 8DN9 8D.2BK 8D.6 8D.8-1 8D.9-1 8DP3-Q1 / V1 8DN With permanent today performance enhancement Generation I Generation III Generation IV Stored spring drive Double pressure / blast valve Generation II Elektro-hydraulic Drive Single pressure / blast cylinder Single pressure / optimized blast cylinder Self-compression / counter-acting piston Page 3 CB-Drive technique CB-Interrupter unit

4 Lifetime expectation GIS-products Market launch and current observation Expected lifetime in years Development of expected lifetime The expected lifetime at market launch of the GIS 1 st generation was 20 years. It rose and rise with the positive operational experiences. today Increased lifetime expectation of GIS Rising operational- and Service experience Continuous technological development Hence, we refer to an expected lifetime of >50 years. Partial mentioned even >60 years. Increasing repeatable product- and manufacturing quality Sustainable design and usage of reliable material Page 4

5 GIS 8DN1/2 Product data Page 5 Jahr Neu Erw Total Rated voltage kv 110/125 Rated frequency Hz 50 Power-frequency withstand voltage (1min) kv up to 325 Lightning impulse voltage (1,2/50µs) kv up to 750 Rated current Busbar A up to 2500 Rated current feeder A up to 1250 Rated inrush current ka up to25 Rated short-time current 1s ka up to 30 Rated breaking capacity GVA 5* Leakage rate SF 6 /year/gas compartment 1% Bay width mm 2400 Bay hight mm 3700 Bay depth mm 5000 Bay weight t 12 * 5 GVA ca.26ka Rated short-time breaking current

6 GIS 8DN1/2 Installed base 88% installed base in 5 countries First delivery Germany 1968 Europe Austria 1970 Middle east Kuwait 1971 GER SAR KUW GRI AUT Americas USA 1973 Production period Last delivery complete bay 1983 Delivered bays worlwide ca. 650 Page 6 * Still in service

7 Overview of standards Year Standard 1965 No GIS-standard existing 1975 IEC 517 GIS 1 st edition 1977 Amendment No. 1, PD-topic included 1982 Amendment No. 2, Focus on enclosures 1983 Amendment No. 3, Arcing-test-procedures 1986 IEC 517 GIS 2 nd edition, Integration of amendment No IEC 517 GIS 3 rd edition, Technical update and reference to other relevant IEC Standards, i.e. IEC Common specifications for high-voltage switchgear and control gear 2003 IEC st edition, Reduction of permissible SF 6 -leakage rate from 1% to 0.5% per year, additional on-site test requirements 2011 IEC nd edition, additional informative observation of service continuity Relevance for GIS of1 st Generation At 1965 no standard does exist for developments of a GIS Even the current standard IEC nd edition 2011, allows the service of a GIS 1 st Generation Page 7

8 Maintenance intervals and - scope of work Maintenance intervals 1 st GIS Generation Scope of work Maintenance 1 st GIS Generation 0 Page 8 Small Revision every 5 years or after 1000 switching cycles Major Revision every 10 years or after 5000 switching cycles Expected lifetime at market launch Current service life as of today 49 years Service life in years Main topics of maintenance to ensure a save operation and function up to the next service interval are: SF 6 Quality incl. heating and monitoring system Hydraulic CB drive system Drives in general Cleaning of all gas compartments Check CB interrupter unit Replacement of all touched O-Rings during maintenance

9 Maintenance experience with GIS 1 st Generation What kind of experience has been gained from us as manufacturer together with our customers along the complete service life? Maintenance are performed more or less according original operational manual from current state very short intervals Scope of work was almost unchanged over the decades wear and tear observed no additional All GIS of 1 st Generation are inhouse this supports long lifetime Maintenance is principally time-based Exception are CB with high numbers of switching cycles Page 9

10 Maintenance experience with GIS 1 st Generation What kind of experience has been gained from us as manufacturer together with our customers along the complete service life? Topic Cast-resin isolated voltage transformer PD Loose shielding Headless screws Single events of leakages after maintenance at nontouched O-Rings (floating bearing of bushing) Illustration Solution Preventive PD-measurment at VT s Replacement by SF 6 - isolated VT s Replacement by optimized headless screw; included in standard-maintenance kit Replacement of affected O-Rings Gas compartments to be inspected by acustic PDmeasurement (without opening) Page 10

11 Review Outlook Conclusion of Siemens report as of 2004 on the occation of the ETG- Symposium in Germany - Diagnostic of electrical assets Technical recommendation for further operation check of all busbars (shielding topic) replacement of suspicious VT s following OEM-maintenance recommendation By implementing these recommended measures a further operation of the GIS is possible for at least 15years! 0 Page 11 Expected lifetime at market launch ETG-Symosium 2004 today Service Lifetime expectation in years Estimation as of 2004 of expected lifetime of GIS 1 st Generation are yet confirmed Report: Diagnoseverfahren zur Zustandsbewertung von gasisolierten Schaltanlagen als Bestandteil des Assetmanagements 2004 Schichler, Sonnenberg, Glaubitz, Wolf, Fritsche

12 CIGRÉ and GIS 1 st Generation Key messages of the CIGRÉ-Brochure 499 (June 2012) according irregularities at GIS in long-time operation SF 6 -leakages (mainly outdoor) Special construction- and material issues Corrosion Mechanical wear (mainly drives) Our GIS-installations of 1st generation are showing a very small sensitivity according this mentioned general observations. Generally very positive experiences are gained. Electrical wear (mainly contact system) Page 12

13 Tightness of GIS in long-time operation 1. IMPORTANT due to EU-F-Gas regulation and self-committment 2. O-Rings do have an important role up to date no failures during operation Actual report/investigation regarding life expectation of O-Rings CIGRÉ Session B in Paris Report 1) at by Soichi Moriguchi (Japan CHUBU Electric Power Utility) The result of the examplary investigation of 69 O-Rings 2) (Ø 10mm) of GIS after 32 years operation in outdoor application was, those O-Rings have a life expectation up to 51 years. Life expectation even higher for O-Rings at indoor GIS. 1) Asset Management for Aged primary equipment 2) Design, material and stress are comparable with O-Rings our GIS of 1st generation Page 13

14 Global view of life expectation of GIS 1 st generation Bay years experience MTBF in years Failure rate λ (1/100 years) MTBF (without failure source human ) Failure rate λ (1/100 Jahre) SIEMENS 8D1 (up to 100kV / 25kA) CIGRÉ 1) (100kV - 200kV) ,14 2) , ,09 MTBF value of 700 years is better than CIGRÉ-Statistic and is not dominated by the GIS itselfs but by other reasons. Wrong operation (modules) e.g. replacement of Secondary equipment Gas extraction in wrong gas compartments 5 safety rules ignored Pollution/contmination Mainly due to no or skipped maintenance 1) Source: Cigré`s 3 rd Survey WG A3.06, 10/2012 Calculation based on Cigré 513; Table ) The reliability statistic for the GIS 8D1 (up to 110kV / 25kA) was compared with the corresponding voltage level of 100kV 200kV from Cigré`s 3rd Survey WG A3.06, 10/2012 Page 14

15 CIGRÉ results and recommendation Equipment factors External factors Changing system requirements Life limiting factors Assessment of residual lifetime Evaluation of options Life extension measure No action regular maintenance Enhanced maintenance Refurbishment Retrofit Replacement Page 15 CIGRÉ Residual Life Concepts Applied to HV GIS - Working Group B3.17 Figure 13.1 Flow chart of evaluation process

16 SIEMENS GIS 1 st generation - Status mirrored on 5 Equipment factors acc. CIGRÉ* Condition & reliability Costs for maintenance and repair Know-how/experience about GIS equipment Very little failure rate No end of life visible Service experience >40 years available (Costs, effectiveness, necessity etc.) Repair individual Provision of certified and skilled supervisors Active Know-How management and product monitoring worldwide Availability of wear parts and consumption material Standardized maintenance packages abailable Upgrade or usage of `Re-used` parts Availability of components for repair and extension Generally available for repair also by using `Re-used` parts Single production nessary Page 16 *CIGRÉ Residual Life Concepts Applied to HV GIS - Working Group B3.17 Chapter 3.3 Residual life

17 Further technical solutions and economic feasibility Replacement of DS- & ES drives (H104-6) by actual drives 8D-mot (serial production) PD-measurement & -evaluation cast-resin isoltaed VT s Replacement by SF6-isolated VT s Replacement of oil-filled HV-cables by dry-cables acc. IEC (VPE / XLPE) 4 Replacement of double-pressure CB by CB of current GIS production 8DN8 Each technical solution is always challanged by the economic feasibility and depends on the individual situation as well as on the customer strategy. Page 17

18 Summary At GIS of 1st generation no end of life is visible Long service-life is supported by Indoor application (no corrosion) Conventional grid station (less switching operations stable S/S) Performance of OEM-recommended maintenance does support long service life According to the title of this lecture: Retirement in the age of 67 years seems to be possible. Page 18

19 Future Do not try to anticipate the future, make it happen. Antoine de Saint-Exupery The curiosity of future is probably the idea, that the present time will be called the good old days. Ernest Hemingway Page 19

20 Thanks for your attention John Siemens DoeAG Job Enrico title Adler Group / Region / Department XY Energy Management Street Customer 123 Services for High Voltage Products Nonnendammallee City 101 Phone: Berlin Germany Mobile: Tel: +49 (30) john.doe@siemens.com Mob: enrico.adler@siemens.com siemens.at/future-of-energy Page 20