BS EN 61064-1993 Guide to acceptance tests for steam turbine speed control systems《汽轮机速度控制系统验收试验指南》.pdf

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1、BRITISH STANDARD BS EN 61064:1993 IEC 1064:1991 Guide to Acceptance tests for steam turbine speed control systems The European Standard EN 61064:1993 has the status of a British Standard UDC 621.165-531.6:621.3:620.1BS EN61064:1993 This British Standard, having been prepared under the directionof th

2、e Machinery andComponents Standards PolicyCommittee, was publishedunder the authorityofthe Standards Boardand comes into effect on 15August1993 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MCE/13 Draft for comment 87/75409DC ISBN 0 580 22445 7 Coo

3、perating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal

4、 Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBS EN61064:1993 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 61064 5 National annex NA (informative

5、) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBS EN61064:1993 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Machinery and Components Standards Policy Committee and is the English lang

6、uage version of EN61064:1993 Acceptance tests for steam turbine speed control systems published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1064:1991 published by the International Electrotechnical Commission (IEC). For graphical symbols, and let

7、ter symbols and signs approved by the IEC for general use, readers are referred to: IEC Publication 27: Letter symbols to be used in electrical technology; IEC Publication 617: Graphical symbols for diagrams The symbols and signs contained in the present publication have either been taken from IEC P

8、ublications27 or617, or have been specifically approved for the purpose of this publication. For general terminology, readers are referred to IEC Publication50: International Electrotechnical Vocabulary (IEV), which is issued in the form of separate chapters each dealing with a specific field, the G

9、eneral Index being published as a separate booklet. Full details of the IEV will be supplied on request. The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication. EN61064 was produced as

10、a result of international discussion in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of it

11、self confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the EN title page, pages2 to30, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporate

12、d. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61064 February 1993 UDC 621.165-531.6:621.3:620.1 Descriptors: Steam turbine, control system, speed, overspeed protection, acceptance test English version Acceptance tests

13、for steam turbine speed control systems (IEC 1064:1991) Essais de rception des sytmes de rgulation de vitesse des turbines vapeur (CEI1064:1991) Abnahmeprfungen fr Dampfturbinen-Regelsysteme (IEC1064:1991) This European Standard was approved by CENELEC on1992-12-09. CENELEC members are bound to comp

14、ly with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Sec

15、retariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as

16、 the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Elect

17、rotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 61064:1993 EEN61064:1993 BSI 11-1999 2 Foreword The CENELEC que

18、stionnaire procedure, performed for finding out whether or not the International Standard IEC1064:1991 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as European Standard. The reference document was submitted to the CENELEC members

19、 for formal vote and was approved by CENELEC as EN61064 on9December1992. The following dates were fixed: For products which have complied with the relevant national standard before1993-12-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for pr

20、oduction until1998-12-01. Annexes designated “normative” are part of the body of the standard. In this standard, Annex A andAnnex ZA are normative. latest date of publication of an identical national standard (dop) 1993-12-01 latest date of withdrawal of conflicting national standards (dow) 1993-12-

21、01EN61064:1993 BSI 11-1999 3 Contents Page Foreword 2 1 Scope and object 5 2 Normative reference 5 3 Terms, symbols, definitions and units 5 4 Guiding principles 7 4.1 Matters on which agreement shall be reached 7 4.2 Time of carrying out tests 8 4.3 Preparation for acceptance tests 8 4.4 Instrument

22、s 8 4.5 Test report 9 5 Speed governing system tests 9 5.1 Turbine at standstill 9 5.2 Turbine at no-load 9 5.2.1 Overview 9 5.2.2 Test procedure for determination of staticcharacteristics 10 5.2.3 Determination of dead band 10 5.2.4 Speed range determination 10 5.2.5 Stability 10 5.3 Turbine on loa

23、d 11 5.3.1 Overview 11 5.3.2 Test conditions 11 5.3.3 Load-steam flow demand relationship 11 5.3.4 Dead band determination Overview 11 5.3.5 Dead band determination Method1 12 5.3.6 Dead band determination Method2 12 5.3.7 Determination of steady-state speed regulation Method1 12 5.3.8 Determination

24、 of steady-state speed regulation Method2 13 5.3.9 Determination of incremental speed regulation Method1 13 5.3.10 Determination of incremental speed regulation Method2 13 5.3.11 Stability 13 5.4 Dynamic tests of the speed governing systemby sudden load rejection to no-load 13 5.4.1 Overview 13 5.4.

25、2 Operating conditions 13 5.4.3 Test procedure 14 5.4.4 Test results 15 5.4.5 Stability 15 6 Overspeed protection system tests 15 Page 6.1 Turbine at standstill 15 6.2 Turbine at no-load 15 6.3 Turbine on load 15 6.4 Dynamic testing of overspeed protectionsystem by turbine tripfrommaximumload 15 6.4

26、.1 Overview 15 6.4.2 Operating conditions 15 6.4.3 Test procedure 15 6.4.4 Test results 15 Annex A (normative) General guidance 17 Annex ZA (normative) Other international publications quoted in this standard with thereferences of the relevant European publications 29 Figure 1 Diagram of condensing

27、reheat steam turbine set 19 Figure 2 Static characteristics at no-load 21 Figure 3 Speed-speed changer setting relationship 22 Figure 4 Static characteristics on load 23 Figure 5 Cylinder fluid pressure versus servomotor stroke 24 Figure 6 Servomotor stiffness characteristic 25 Figure 7 Network freq

28、uency-load relationship 26 Figure 8 Static characteristic of the speed governing system for one setting of the speed changer 27 Figure 9 Block-diagram of a typical speed governing system 28 Table 1 5 Table 2 6 Table 3 144 blankEN61064:1993 BSI 11-1999 5 1 Scope and object This International Standard

29、 applies primarily to constant-speed steam turbines driving a.c.generators at power stations, for testing speed control systems consisting of speed governing and overspeed protection systems. It may also be used, where appropriate, for other types of steam turbines. The purpose of acceptance tests o

30、f steam-turbine speed governing and overspeed protection systems is to verify any criteria quoted in the manufacturers guarantees. Such tests will generally be carried out to check compliance with IEC45-1. The criteria may include: a) steady-state speed regulation (speed governing droop); b) steady-

31、state incremental speed regulation (incremental speed governing droop); c) range of speed at no-load corresponding to the extreme settings of the speed changer; d) dead band of the speed governing system; e) stability of the speed governing system; f) maximum transient increase of speed following fu

32、ll load rejection and any partial load rejections, with the speed governing system in operation; g) overspeed trip setting; h) maximum transient overspeed following full load rejection on the failure of the speed governing system. Selection of the tests to be carried out and procedures for other tes

33、ts not covered by this specification shall be agreed upon between the manufacturer and the purchaser. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition

34、indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid I

35、nternational Standards. IEC 45:1991, Steam turbines Part1:Specifications. 3 Terms, symbols, definitions and units Using these rules it is recommended to employ the symbols, definitions and units that are given inTable 1 andTable 2 and inFigure 1. Table 1 lists basic terms, symbols, and units, whileT

36、able 2 presents terms, symbols, definitions, and units of parameters specific to this standard. IEC45-1 definitions are also applicable. Table 1 No. Term Symbol Unit 1 Power or load L MW or kW 2 Pressure p MPa or bar 3 Temperature e K or C 4 Angular speed 6 rad/s 5 Rotational speed n Hz, rev/s (rev/

37、min) 6 Voltage U V 7 Current I A 8 Position or stroke of servomotors s mm, rad or ( ) 9 Position or stroke of valves h mm, rad or ( ) 10 Position or stroke of pilots x mm, rad or ( ) 11 Time constant, characteristic time of element T s 12 Time as independent variable t s 13 Speed or load setting poi

38、nt y % or otherEN61064:1993 6 BSI 11-1999 Table 2 No. Term Symbol Definition Unit 1 Rated speed n o The speed at which the turbine is specified to operate at its rated output Hz rev/s rev/min 2 Minimum controlled speed at no-load n 1 The speed at no-load corresponding to the lower setting of the spe

39、ed changer Hz rev/s rev/min 3 Maximum controlled speed at no-load n 2 The speed at no-load corresponding to the upper setting of the speed changer Hz rev/s rev/min 4 Temporary speed rise The transient increase in turbine speed following a load rejection, with the speed governing system in operation.

40、 The rated temporary speed rise applies if the rated output is rejected at rated speed Hz rev/s rev/min 5 Maximum speed rise The maximum transient increase in turbine speed following a load rejection, with the speed governing system inoperative. The rated maximum speed rise applies if the rated outp

41、ut is rejected at rated speed Hz rev/s rev/min 6 Maximum transient speed n m The maximum transient increase in turbine speed following rejection of maximum capability by disconnecting the generator from the electrical system (with auxiliary supplies previously disconnected) and the speed governing s

42、ystem in operation Hz rev/s rev/min 7 Maximum transient overspeed n ops The maximum rotational speed following rejection of maximum capability by disconnecting the generator from the electrical system (with auxiliary supplies previously disconnected) and the speed governing system inoperative Hz rev

43、/s rev/min 8 Overspeed trip setting n s The speed at which the overspeed trip is set to operate Hz rev/s rev/min 9 Maximum continuous rating (MCR) (electrical generating set) L o The power output assigned to the turbine-generator by the supplier, at which the unit may be operated for an unlimited ti

44、me, not exceeding the specified life, at the specified terminal conditions. This is the rating which will normally carry a guarantee of heat rate. The governing valves will not necessarily be fully open. (Also referred to as rated output, rated power or rated load) MW or kW 10 Maximum capability L m

45、ax The maximum power output that the turbine can produce with the governing valves fully open and at the specified initial steam conditions. (Also referred to as valves-wide-open capability or maximum load) MW or kWEN61064:1993 BSI 11-1999 7 Table 2 4 Guiding principles 4.1 Matters on which agreemen

46、t shall be reached a) The parties to the test shall, prior to the tests, reach agreement on the object of the tests and on the interpretation of the guarantees. Unless otherwise stated in the contract, the control system functions shall be verified in accordance with1.2. b) Agreement shall be reache

47、d on the method of operation and on such matters as the means of maintaining constant steam conditions and output. If the test conditions differ from those specified in the test program, agreement shall be reached on the methods of conversion of experimental values. No. Term Symbol Definition Unit 1

48、1 Maximum overload capability L ol The maximum power output that the unit can produce with the governing valves fully open, and with the terminal conditions specified for overload, e.g.with final feed water heater bypassed or with increased initial steam pressure MW or kW 12 Dead band of the speed g

49、overning system The total magnitude of the change in steady-state speed (expressed as a percentage of rated speed), within which there is no resultant change in the position of the governing valves. The dead band is a measure of the sensitivity of the system % (Dimension-less) 13 Steady-state speed regulation (speed governing droop) $ The steady-state speed change, expressed as a percentage of rated speed, when the load of an isolated unit is changed between rated load and zero load, with identical setting of the