1、BRITISH STANDARDBS EN 60308:2005Hydraulic turbines Testing of control systems The European Standard EN 60308:2005 has the status of a British StandardICS 27.140g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44
2、g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60308:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2005 BSI 31 October 2005ISBN 0 580 46221 8National forewordThis British Standard is the official English la
3、nguage version of EN 60308:2005. It is identical with IEC 60308:2005.The UK participation in its preparation was entrusted to Technical Committee MCE/15, Hydraulic turbines, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secret
4、ary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue
5、 or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the tex
6、t; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an
7、 inside front cover, the EN title page, pages 2 to 86, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60308 NORME EUROPENNE EUROPISCHE
8、NORM June 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any
9、means reserved worldwide for CENELEC members. Ref. No. EN 60308:2005 E ICS 27.140 English version Hydraulic turbines Testing of control systems (IEC 60308:2005) Turbines hydrauliques Essais des systmes de rgulation (CEI 60308:2005) Wasserturbinen Prfung von Regelsystemen (IEC 60308:2005) This Europe
10、an Standard was approved by CENELEC on 2005-05-01. CENELEC members are bound to comply 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
11、concerning such national standards may be obtained on application to the Central Secretariat 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
12、into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
13、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 4/199/FDIS, future edition 2 of IEC 60308, prepared by IEC TC 4, Hydraulic turbines, was submitted to the IEC-CENELEC parallel
14、 vote and was approved by CENELEC as EN 60308 on 2005-05-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-02-01 latest date by which the national standards conflicting
15、 with the EN have to be withdrawn (dow) 2008-05-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60308:2005 was approved by CENELEC as a European Standard without any modification. _ 2 EN 60308:2005 3 CONTENTS INTRODUCTION.5 1 Scope and object6 2
16、 Normative references .6 3 Terms and definitions, symbols and units 7 4 Functions and components of hydro control systems .11 4.1 Control systems proper11 4.2 Other control systems and transitions.11 4.3 Control system components.11 4.4 Safety functions, 4.14 of IEC 61362 .12 4.5 Environmental prote
17、ction, 4.16 of IEC 6136212 4.6 Electromagnetic compatibility (EMC) 12 5 Contractual stipulations 12 5.1 Guarantees and acceptance tests 12 5.2 Documentation 12 6 Control system tests .13 6.1 General .13 6.2 Recommendations on workshop tests 13 6.3 Recommendations on field tests.14 6.4 Electrical che
18、cks15 6.5 Test of converters, amplifiers and actuators .17 6.6 Site tests of controller characteristics.24 6.7 Safety tests .28 6.8 Test conditions to be fulfilled .30 6.9 Isolated network field tests 32 6.10 Role of controller for stability in interconnected power systems.34 7 Inaccuracies in contr
19、oller tests35 8 Simulation of governing and control operations .38 8.1 General remarks38 8.2 Simulator characteristics39 8.3 Inaccuracy of plant simulators, calculations of pressure surge and control parameters39 Annex A (informative) Test procedures.41 Annex B (informative) Recommendation for testi
20、ng of turbine controllers 45 Annex C (informative) Field test of control systems.56 Annex D (informative) Control system test examples 59 Figure 1 Servomotor cushioning time Th.7 Figure 2 Turbine control transmission ratio .8 Figure 3 Controlled system self-regulation factor 9 Figure 4 Oil flow Q fu
21、nction of input current I and pressure drop p.17 Figure 5 Electro hydraulic converter for high grade control system18 EN 60308:2005 4 Figure 6 Output stroke s of a converter versus input current I19 Figure 7 Performance curves of control valves21 Figure 8 Example of on-line simulated isolated grid t
22、est34 Figure D.1 Insensitivity test under speed control with X-Y recording70 Figure D.2 Insensitivity test under power control with time characteristics .71 Figure D.3 Flutter test of 2 regulated quantities with X-Y recording .72 Figure D.4 Measurement of a unit step response with PID speed controll
23、er 73 Figure D.5 Measurement of a unit step response with speed control for determination of PID controller parameters .74 Figure D.6 Measurement of unit step response in isolated operation .75 Figure D.7 Measurement of a unit step responses with power control (Pelton turbine) .76 Figure D.8 Measure
24、ment of unit step responses with power control (pump turbine) .77 Figure D.9 Measurement of a unit step response with power control for determination of PI-controller parameters.78 Figure D.10 Measurement of a unit step response with head race level control79 Figure D.11 Measurement of the unit step
25、 responses with head race level control in multi-unit operations .80 Figure D. 12 Measurement of a load rejection with transition into no-load operation 81 Figure D.13 Measurement of a load rejection with limit control of surge and suction waves and with transition into no-load operation82 Figure D.
26、14 Measurement of a start-up process under load 83 Figure D.15 Measurement of changeover from full turbine load to synchronous condenser operation .84 Figure D.16 Measurement of a power step response in on-line simulated isolation test85 EN 60308:2005 5 INTRODUCTION The control functions of water tu
27、rbines have undergone far-reaching changes and at the same time gained in importance during the last few decades. This is shown in the fact that a new standard has been developed: i.e. IEC 61362. EN 60308:2005 6 HYDRAULIC TURBINES TESTING OF CONTROL SYSTEMS 1 Scope and object This International Stan
28、dard deals with the definition and the characteristics of control systems and is the basis for tender documents and technical tenders. It is not limited to the actual controller tasks but also include other tasks which may be assigned to a control system, such as for instance sequence control tasks,
29、 safety, provision for the actuating energy. The testing of control systems for hydro turbines can generally fulfil the following tasks: verification of system characteristics as per contract specification; verification of general proper functioning in the workshop and/or on site; tests to prove the
30、 fulfilment of guarantees; assessment of the actual state of an existing control system with regard to the question of repair or replacement. This standard covers the following systems: speed, power, opening, water level and flow control for all turbine types; electronic, electrical and fluid power
31、devices; safety devices; start-up, shutdown devices etc. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (incl
32、uding any amendments) applies. IEC 60041:1991, Field acceptance tests to determine the hydraulic performance of hydraulic turbines, storage pumps and pump-turbines IEC 60193: 1999, Hydraulic turbines, storage pumps and pump-turbines Model acceptance tests IEC 60545, Guide for commissioning, operatio
33、n and maintenance of hydraulic turbines IEC 61362: 1998, Guide to specification of hydraulic turbine control systems IEC 61000-4-2, Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test IEC 61000-4-3, Electromagnetic compatibility (EMC
34、) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic field immunity test IEC 61000-4-6, Electromagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields EN 60308:2005 7 ISO 4406
35、: 1999, Hydraulic fluid power Fluids Method for coding the level of contamination by solid particles 3 Terms and definitions, symbols and units For the purposes of this document, the following terms and definitions, symbols and units, as well as the terms and definitions, symbols and units given in
36、IEC 61362, apply. Sub-clause Term Definition Quantity Unit Relative quantity 3.1 General definitions 3.1.1 speed deviation at a considered instant, the difference between the actual speed of rotation and a reference speed n f rev/min rad/s Hz xn3.2 Performance under major disturbances 3.2.1 servomot
37、or cushioning time elapsed time during which the rate of servomotor travel is retarded beginning at a specified servomotor position to full closed position (see Figure 1) Ths 3.2.2 servomotor force net opening and/or closing force generated by the servomotor when supplied with oil at the minimum spe
38、cified pressure NOTE When penstock water pressure is used to provide the closing force, the head at which the servomotor shall be rated should be stated. For spring operated servomotors it is the net force exerted by the servomotor when the spring is at its maximum extended position F N 3.2.3 servom
39、otor capacity product of the maximum servomotor stroke and the force as described under 3.2.2 F YMmNJ = Y/Ymaxt 1,0 TqTfTh0 0 IEC 036/05 Figure 1 Servomotor cushioning time ThEN 60308:2005 8 Sub-clause Term Definition Quantity Unit Relative quantity 3.3 Terms relating to the controlled system 3.3.1
40、controlled system system controlled by the governing system consisting of the hydraulic turbine, its water supply and discharge passages, the generator with voltage regulator and the electric power network to which it is connected 3.3.2 torque deviation power output deviation divided by instantaneou
41、s angular speed M Nm m 3.3.3 unit acceleration constant ratio of the angular momentum of the unit to the guarantee torque Tas 3.3.4 load acceleration constant ratio of the angular momentum, caused by the network referred to the guaranteed torque of the unit Tbs 3.3.5 turbine control transmission rat
42、io At a considered servomotor position, the slope of the graph relating to the turbine torque mt at constant speed and head to servomotor movement y (see Figure 2) ymyMMeddd)(dtrty= ey3.3.6 speed regulation graph graph showing the relative speed as a function of the relative power rPPp = , when the
43、controller is in equilibrium and the command signal is constant mt1,0 1,0 Y/Ymax0 0 eyIEC 037/05 Figure 2 Turbine control transmission ratio EN 60308:2005 9 Sub-clause Term Definition Quantity Unit Relative quantity 3.3.7 permanent speed regulation slope of the speed regulation graph at a specific p
44、oint of operation ep= pnddxx ep3.3.8 maximum power change speed regulation difference between the relative speeds read from the speed regulation graph at zero power and rated power es3.3.9 controlled system self-regulation factor at the speed considered, the slope of the graph relating to the torque
45、 deviation to the speed at a specified servomotor position and a specified load condition of the network. The torque should be referred to the rated torque Pr/rand the speed referred to the rated speed r (see Figure 3) en3.3.10 turbine self-regulation factor component of endue to the turbine nttddxm
46、e = Pr and rare the same values as used to determine en(see Figure 3) et3.3.11 load self-regulation factor component of en due to the load nrrnggd)(dddxP/Pxme = Prand rare the same reference values as used to determine en(see Figure 3) egm mgmt0 0 eneget1,0 0 xnIEC 038/05 Figure 3 Controlled system
47、self-regulation factor EN 60308:2005 10 Sub-clause Term Definition Quantity Unit Relative quantity 3.3.12 network load characteristic coefficient expressing the ratio of relative torque variation of the load to the relative speed variations. The value to which the power variations, P, to be referred
48、 is the actual power, P1, absorbed by the network. For practical purposes, the constant, eb, is obtained from the formula: eb= 1/n1xPPeb3.3.13 penstock reflection time time required for the pressure waves to travel 2 lengths of the penstock: =naLT1ii2riwhere aiis the velocity of wave propagation in
49、each section of the penstock; Li is the length of each penstock section Trs 3.3.14 water inertia time characteristic time at rateda)condition due to inertia of the water in the water passages defined as: ii1rrWALgHQTni= where Aiis the area of each section; Liis the corresponding length; Qris the rated discharge; Hris the rated head; g is the acceleration due to gravity TWs 3.3.15 water hammer numbe
