Transforming Transformer Reliability & System Efficiency With The Right Oil Dr Peter Smith Global Technology Manager Shell Global Solutions (UK) UK

Transcription

1 Transforming Transformer Reliability & System Efficiency With The Right Oil Dr Peter Smith Global Technology Manager Shell Global Solutions (UK) UK

2 Definitions and cautionary note The companies in which Royal Dutch Shell plc directly and indirectly owns investments are separate entities. In this presentation Shell, Shell group and Royal Dutch Shell are sometimes used for convenience where references are made to Royal Dutch Shell plc and its subsidiaries in general. Likewise, the words we, us and our are also used to refer to subsidiaries in general or to those who work for them. These expressions are also used where no useful purpose is served by identifying the particular company or companies. Subsidiaries, Shell subsidiaries and Shell companies as used in this presentation refer to companies over which Royal Dutch Shell plc either directly or indirectly has control. Companies over which Shell has joint control are generally referred to joint ventures and companies over which Shell has significant influence but neither control nor joint control are referred to as associates. In this presentation, joint ventures and associates may also be referred to as equity-accounted investments. The term Shell interest is used for convenience to indicate the direct and/or indirect (for example, through our 23% shareholding in Woodside Petroleum Ltd.) ownership interest held by Shell in a venture, partnership or company, after exclusion of all third-party interest. This presentation contains forward-looking statements concerning the financial condition, results of operations and businesses of Royal Dutch Shell. All statements other than statements of historical fact are, or may be deemed to be, forward-looking statements. Forward-looking statements are statements of future expectations that are based on management s current expectations and assumptions and involve known and unknown risks and uncertainties that could cause actual results, performance or events to differ materially from those expressed or implied in these statements. 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All forward-looking statements contained in this presentation are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. Readers should not place undue reliance on forward-looking statements. Additional risk factors that may affect future results are contained in Royal Dutch Shell s 20-F for the year ended December 31, 2012 (available at and ). These risk factors also expressly qualify all forward looking statements contained in this presentation and should be considered by the reader. Each forward-looking statement speaks only as of the date of this presentation, 5 June 2013 Neither Royal Dutch Shell plc nor any of its subsidiaries undertake any obligation to publicly update or revise any forward-looking statement as a result of new information, future events or other information. In light of these risks, results could differ materially from those stated, implied or inferred from the forward-looking statements contained in this presentation. We may have used certain terms, such as resources, in this presentation that United States Securities and Exchange Commission (SEC) strictly prohibits us from including in our filings with the SEC. U.S. Investors are urged to consider closely the disclosure in our Form 20-F, File No , available on the SEC website You can also obtain these forms from the SEC by calling SEC-0330.

3 Agenda Technical challenges/trends for transformers & oils? International transformer oil specifications Gas To Liquids (GTL) transformer oils compared to conventional oils Transformer oil properties & performance OEM & utility approvals & field experience Conclusions - benefits of GTL based transformer oil over conventional oils

4 What is the function of a transformer oil? Electrical Insulation Electrical insulation- between the coil windings Cooling The transfer of heat away from the core Information transfer Analysing the oil can give an indication of transformer health

5 Changes to transformer technology and operation means the oil needs to work harder Higher power / weight & volume ratios to reduce manufacturing and installation costs Regulatory requirements Expectations for a longer operating life Higher voltages to improve transmission efficiencies More frequent operation under overload and less redundancy in case of failure Higher temperatures

6 International insulating oil specifications IEC BS DIN/VDE BIS ASTM BS IEC (2012) Unused mineral oils for transformers and switchgears IEC (2013) Supervision and maintenance guidance IEC (2007) Guide to the interpretation of dissolved and free gases analysis

7 Gas-To-Liquids technology process Catalytic Process to Convert Gas to Oil Products GTL oil, primarily iso-paraffinic, no impurities, excellent antioxidant response, narrow molecular distribution

8 Oil life - inhibited GTL versus conventional inhibited oil GTL inhibited oils Exceptional resistance to degradation

9 Oil life - inhibited GTL versus conventional uninhibited oil IEC 61125C = induction period = volatile acidity >>0.1 mg KOH/g Inhibited oils show predictable & best resistance to degradation Our laboratory and field testing of transformer oils show that inhibited oils offer enhanced performance compared with uninhibited oils. Ivanka Hoehlein, Manager, Material Testing Laboratory, Siemens

10 Second dimension relative_retention time in seconds dependant on polarity Resistance to ageing & degradation corrosive sulphur <50 ppm sulphur Conventional inhibited oil First dimension retention time in minutes dependant on volatility ~300 ppm sulphur Uninhibited oil Source: IEC TC10 Cape Town 2005

11 Cooling viscosity (fluidity) Diala typical viscosity (cst) versus temperature ( C) Good fluidity across broad temperature range, especially low temperatures down to -30 C, facilitating cooling

12 Cooling thermal properties We made a back to- back heat run test of Diala S4 and [competitor A] with transformers of different design and discovered a temperature decrease of 2,5 K with Diala S4. E Guarato, Purchasing Manager & E. Beaurez, Director General, CELDUC

13 Electrical properties lightning impulse breakdown Lightning impulse breakdown voltage testing Needle-plane & needle-sphere electrode configurations (gap typically 25 mm, using positive & negative impulses) Testing run at the University of Manchester Two oils Diala S4 ZX-I (GTL) & Diala S3 ZX-I (water < 10 ppm) Needle sphere (IEC method A) 300 ml oil Steel needle tip radius 7-2 micron elipse Brass sphere electrode 12.5 mm diameter Needle plane 12.5 litre oil Tungsten needle tip radius 50 +/- 5 micron Brass plane electrode 200 mm diameter

14 Electrical properties lightning impulse breakdown Average breakdown voltage in kv (Gap 25 mm unless specified) mm gap Shell Diala S3 ZX-I Shell Diala S4 ZX-I (GTL) Needle - sphere +ve Needle - sphere -ve Needle - plane +ve Needle - plane -ve Diala S4 ZX-I (GTL) shows greater ability to withstand severe voltage transients in service such as those due to switching or lightning strikes

15 Ease of use - compatibility/miscibility No miscibility, compatibility, solvency issues found. GTL based transformer oils can be used alongside traditional hydrocarbon oils

16 Oil condition monitoring in service DGA can be used as usual with GTL transformer oils (Duval triangles) Partial Discharge Partial Discharge low Energy Hotspot C Hotspot >700 C

17 Approval testing by OEMs & utility companies GTL oil meets the requirements of major OEMs & utility companies Validated & approved by amongst others: Siemens ABB Alstom CG Power Systems Eskom (evaluation in progress) Machinenfabrik Reinhausen (MR) RWE (Germany) Vattenfall (Germany GDF-Suez (France)/ Electrabel (Belgium

18 Conclusions Benefits of GTL inhibited transformer oils versus conventional oils Meets/exceeds IEC 60296:Ed highest oxidation stability, low sulphur Ability to withstand severe voltage transients Modeling predicts good to superior cooling in service Exceptional resistance to ageing & degradation Essentially zero sulphur minimises risks due to corrosive sulphur Product is very pure, only contains base oil and antioxidant Consistent chemical composition = consistent global performance Easy to use with other oils, no miscibility/compatibility/solvency issues found Product evaluated, approved & used by major OEMs & utilities since 2013

19 Questions?