660MW 0.85PF Type Test Report

8/13/2019 660MW 0.85PF Type Test Report

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QFSN-660-2-22A

660MW THE TYPE TEST REPORT FOR 660MW GENERATOR

DSZ2009-05

Number

DONGFANG ELECTRIC MACHINERY CO., LTD.

OO


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QFSN-660-2-22A

660MW THE TYPE TEST REPORT FOR 660MW GENERATOR


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: QFSN- 660- 2- 22AType660MW

THE TYPE TEST REPORT OF 660MW

TURBINE GENERATOR: HD215-1-12Shop Order

SHEET 1 OF 43

DONGFANG ELECTRICAL MACHINERY CO., LTD.

Contents

1 ................................................................................................................................. 3Rating specification of generator.......................................................................................................... 3

2 ............................................................................................................................................ 4Test standards ........................................................................................................................................ 4

3 ............................................................................... 5Measurement of D.C resistance of stator winding and rotor wind ing ............................................... 5

4 ............................................................................... 6Measurement of insu lation resistance of stator winding and rotor w inding..................................... 6

5 ................................................................................................. 7Withstanding DC voltage test and determining leak current .............................................................. 7

6 ................................................................................................. 8Measurement of insulation resistance of bearing and oil seal to ground ......................................... 8

7 .................................................................... 9Mechanical inspection without excitation ............................................................................................ 9

8 .................................................................................... 10Measurement of AC impedance of excitation winding at different speeds ..................................... 10

9 ................................................................................................................................... 11Open circuit characteristic .................................................................................................................. 1110 1500RPM, 1.3.................. 13No load saturation characteristic at reduced speed (about 1500 r/min) versus field current ........ 13

11 ...................................................................................................................................... 15Phase Sequence Test ........................................................................................................................... 15

12 THDTHF ...................................... 16Measurement of voltage total harmonic distortion and telephone harmonic factor...................... 16

13 .......................................................................................................................................... 17Shaft voltage ......................................................................................................................................... 17

14 ...................................................................................................................................... 18Moments of inertia................................................................................................................................ 18

15 ........................................................................................................................ 19Three phase sustainedshort c ircuit characteristic ........................................................................... 19

16 SCR .................................................................................................................................. 21Short-circuit ratio and .......................................................................................................................... 21

17 Xd........................................................................................................................... 2118 ............................................................................................... 22Load excitation current and voltage regulation ................................................................................. 22

19 ............................................................................................................................ 23Friction and windage losses................................................................................................................ 2320 Pfe.................................................................................................. 24


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Measurement of core losses at the rated voltage and frequency .................................................... 2421 ............................................................................................................................ 26Short-circuit Losses ............................................................................................................................. 26

22 100%80%60% ................................................. 28Determination of generator efficiency by the separation of losses at 100%,80%and 60%load ..... 28

23 .................................................................................................................... 29Equivalent heat runs to determine temperature rises ....................................................................... 29

24 ........................................................................................................................ 32Three phase sudden short c ircui t test ................................................................................................ 32

5 ............................................................................................................................... 34Voltage recovery test ........................................................................................................................... 34

6 ............................................................................................... 36Determination o f negative sequence reactance from the line-to-line sustained short-circui t test 36

7 ........................................................................................... 37Determination ofzero-sequence reactance from the line-to-line and to neutral short-circuit test

............................................................................................................................................................... 37

28 .................................................................................................................... 38Measurement of vibration of frame and stator core .......................................................................... 38

29 ............................................................................. 39Insulation resistance measurement (before h.p and after H.P.) ....................................................... 3930 .......................................................................... 39A.C. Hi-potential test for stator winding and stator terminal bushings af ter heat run test . ........... 39

31 ................................................................................................... 40Measurement of the stator and the rotor winding capacitance ........................................................ 40

32 ............................................................................................... 41Measurement of D.C resistance and insulation resis tance for RTDs .............................................. 41

33 ............................................................................................................................... 42Summary of test results ....................................................................................................................... 42


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1 Rating specification of generator

QFSN-660-2-22A

Type

776.5 MVA

MVA rating

660 MW

Rated output

22000 VRated voltage

20377 A

Rated current

0.85

Power factor

3

No.of phase

50 HZ

Frequency

3000 r/min

Rated speed

F B temp. limited in B class

Insulation class

(at 100) 468.21 V

Exciter voltage

4476 A

Exciter current

0.45 MPa

Rated H2gas pressure

H2o-H2- H2

Cooling mode

YY

Stator winding connection


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2 Test standards

2.1. ADANI660MW ITP

Inspection and test plan for Indian APL660MWgenerator running tests

2.2.

Contract of the production

2.3. IEC60034-1 1

Rotating electrical machines Part 1:Rating and performance

2.4. IEC60034-2 2

Rotating electrical machines Part 2: Methods for determining losses and efficiency

of rotating electrical machinery from tests

2.5. IEC60034-3 3

Rotating electrical machines Part 3:Specific requirements for cylindrical rotor

synchronous machines

2.6. IEC60034-4 4

Rotating electrical machines Part 4:methods for determining synchronous machine

quantities from tests

2.7. IEEE115-2002

IEEE Guide: Test procedures for synchronous machines

2.8. GB/T7064-2008Specific requirements for cylindrical rotor synchronous machines


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3 Measurement of D.C resistance of stator windingand rotor wind ing

3.1. IEC60034-4(57)

Procedure

3.2.

Stator winding

Phase

()Measurement

resistance

Average

()

95

Resistance at 95

(

)

un-balance

(%)U-X 0.0011067

V-Y 0.0010967

W-Z 0.0011067

0.0011034 0.0014856 0.91

Temperature10.1 10.1 95 /

Criteria( R/max - Rmin) / Rmin1.0%

3.3.

Field Winding

Measurement D.C resistance

95 Resistance at 95

()

Field Winding0.07790 0.10081

()

Temperature20 95

3.4.

Judgment Acceptable


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4 Measurement of insulation resistance of stator winding and rotor winding

4.1.

Stator winding to ground

U-VW

U to V W and

ground

V-UW

V to U W and

ground

W-UV

W to U V and

ground

Duration

Megger(V)

(M)

Insulation Resistance1880 1950 2000 15s

(M)Insulation Resistance 7750 9300 9040 60s

Absorptions4.12 4.77 4.52 60s/15s

(M)Insulation Resistance

41500 82600 66900 600s

Polarization Index5.35 8.88 7.40

600s60s

5000

Temperature.9.7

Humidity48

4.2.

Field Winding to ground

Phase

Measurement value

Duration

Temperature

Megger

Field Windingto ground

150 M 60sec 20 500V

4.3. IEEEstd 43 GB/T7064-2008

Criteria

2.0

Stator windingPolarization Index

1.0M

Rotor winding Insulation Resistance

4.4.

Judgment Acceptable


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5 Withstanding DC voltage test and determining leak current

5.1

Generator condition during test: The stator winding without water.

5.2

Test data

UN22000 V unitA

Duration1.0UN 1.5UN 2.0UN 2.5UN 3.0UN 3.5UN

15 s 6 8 17 24 48 91U VW U phase to VW phase

And to ground 60s 4 9 11 26 42 89

15 s 12 12 21 32 53 95V UW V phase to UW phase

And to ground 60s 6 9 16 29 49 93

15 s 8 13 17 38 67 114W VU W phase to VU phase

And to ground 60s 4 7 14 35 60 111

Temperature10.1

Humidity48

Criteria (Imax-Imin)/ Imin50(at 2.5UN)

5.3 GB/T7064-2008(4.10.3)

Criteria

5.4

Judgment Acceptable


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6 Measurement of insulation resistance of bearing and oil seal to ground

6.1 Measurement of insulation resistance slip ring side bearing to ground

(M)Measurement value

()

Temperature

Megger

Slip ring side bearingto ground

100 10 1000V

6.2

Measurement of seal oil insulation resistance(M)

Measurement value

()

Temperature

Megger

Slip ring side to ground60 10 1000V

6.3 GB/T7064-2008(4.10.2.5) 1M

Criteria Not less than 1M

6.4

Judgment Acceptable


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7 Mechanical inspection wi thout excitation

7.1

Mechanical inspection

Abnormal sound: None

7.2

Bearing oil temperature

(

)Outlet oil

()

Bearing temperature

Speed

(r/min)

Inlet oil

()

Turbine side

Exciting side

Turbine side

Exciting side

3000 25.9 43.6 41.3 64.9 60.3

7.3 :9070

Criterion: contract requirement, bearing Temp. 90, bearing & sealing outlet oil Temp70

7.4

Measurement of Shaft Vibration

7.4.1

Test condition

(r/min)

Speed3000

7.4.2

Measuring value

Measure position

T/E

p-pm

E/E

p-pm

Sensor orientation +45 -45 +45 -45

Shaft vibration 27 19 30 64

7.4.3 : Shaftvibration0.076mm(p-p).

Criterion: Shaftvibration: ISO 7919.2-2001 Table A.1(Contract: 0.076mm(p-p)),

7.4.4 .

JudgmentAcceptable


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8 Measurement of AC impedance of excitation winding at different speeds

8.1 .

Measurement of AC impedance of excitation winding at different speeds

Speed

r/min

Frequency(Hz)

Voltage(V)

Current(A)

Impedance

()

Impedance

Unbalancedness

0 50.005 222.19 37.4715.9296

300 50.014 220.71 38.276 5.7663 2.75%600 49.979 216.94 38.525

5.6311 2.34%900 49.978 215.19 39.098

5.5038 2.26%1200 49.990 214.65 39.807

5.3923 2.03%1500 49.997 215.11 40.224

5.3478 0.83%1800 50.024 215.79 41.303

5.2246 2.30%2100 49.989 212.78 41.613

5.1132 2.13%

2400 49.970 211.75 42.3435.0008 2.20%

2700 49.986 211.48 43.290 4.8852 2.31%3000 49.986 209.59 43.901

4.7742 2.27%

8.2 : JB/T8446-2005(6.1.2) , 600r/min 300r/min 5%

Criterion: The difference between impedances cannot overpass5% per 300rpm above 600rpm.

8.3

JudgmentAcceptable


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9 Open circuit characteristic

9.1 IEEE115-2002(4.2.5)

Procedure

9.2

Measuring value

Terminal voltage(line to line)

Frequency

(Hz)

Field current

(A)

Average(V)

50Hz

Corrected(V)

P.U.

49.903 2035.0 24210 24257 1.10

49.927 1799.0 23152 23186 1.05

49.947 1608.0 21976 21999 1.00

49.953 1469.0 21008 21028 0.96

49.964 1329.0 19592 19606 0.89

49.971 1244.0 18728 18739 0.85

49.975 1136.0 17548 17557 0.8049.980 1058.0 16521 16528 0.75

49.982 1018.0 15411 15417 0.70

49.985 894.0 14246 14251 0.65

49.988 814.0 13060 13063 0.59

49.996 685.0 11083 11084 0.50

50.005 533.0 8745 8744 0.40

50.009 355.0 5830 5829 0.26

50.011 299.0 4934 4933 0.22

50.011 0.0 107 107 0.00


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9.3 Open Circuit Characteristic Curve

No load saturation characterisic

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

0 500 1000 1500 2000 2500

If(A)

U/UN

1 Fig1

Ifo

Field Current at Rated Voltage1600A

Ifg

Air-Field Current at Rated Voltage1370A


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10 1500RPM,1.3No load saturation characteristic at reduced speed (about 1500 r/min) versus field current

10.1 IEEE115-2002(4.2.5)

Procedure

10.2

Measuring value

Terminal voltage(line to line)

Frequency

Field current Average

50Hz

Corrected to50Hz

U/UN

Hz A V V p.u

25.086 3778.0 14363 28628 1.30

25.051 3118.0 13715 27374 1.24

24.948 2725.0 13208 26472 1.20

25.010 2326.0 12665 25320 1.15

25.046 2019.0 12103 24162 1.10

25.057 1771.0 11530 23008 1.05

25.079 1588.0 10954 21839 0.99

25.028 1288.0 9623 19225 0.87

25.035 1237.0 9323 18619 0.85

25.043 1129.0 8729 17427 0.79

25.047 1056.0 8273 16516 0.75

25.050 985.0 7777 15523 0.71

25.055 895.0 7145 14259 0.65

25.060 824.0 6605 13178 0.60

25.065 622.0 5016 10006 0.45

25.066 557.0 4528 9032 0.41

25.068 350.0 2800 5585 0.25

25.068 0.0 56.2 112 0.01


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10.3Open Circuit Characteristic Curve

1500rpm

No load saturation characterisic

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

0 500 1000 1500 2000 2500 3000 3500 4000

If(A)

U/UN

2 Fig2


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11 Phase Sequence Test

11.1 IEEE115-2002 (3.7.2)W

VU

Procedure: When generator is rotating in the direction of CW viewed from exciter end the phase

sequence at the terminals is WVU.

11.2

Terminal sketch

Exciter End Turbine End

Z W

Y V

X U

3 Fig3 Top view

11.3 Judgment Conforming to Drawing


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12 THDTHFMeasurement of voltage total harmonic distortion and telephone harmonic factor

12.1 IEC60034-1-2004 ( 9.11) & IEEE115-2002 ( 3.8.1)

Procedure:

12.2

Measurement value

Terminal voltage (V)22000

Frequency (Hz)

49.944

THD

Total harmonic distortion (%)0.31

THF (%)

Telephone harmonic factor0.20

12.3 5% 1.5%

Criteria: Total harmonic distortion not more than 5% and telephone harmonic factor: not more than

1.5%

12.4

JudgmentAcceptable


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13 Shaft voltage

13.1 IEEE115-2002 (3.6.2)

Procedure:

13.2

Test Condition

(r/min)

Speed3000

(V)

Terminal voltage 22000

13.3

Measurement value

U= 4.927 V

Shaft voltage

: U= 4.920 V

Voltage of shaft to ground on exciter end

4 Fig4

13.4 20 V

Criteria Shaft Voltage

13.5 :

Judgment:Acceptable

V V


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14 Moments of inertia

14.1 IEEE115-2002 (4.4.1)

Procedure:

14.2

Measurement value

Driving Motor

Generator

Voltage

(V)

Current

(A)

Input(kW)

Field current

(A)

10077 174.54 2350.25 1600

nN

Rated speed3000 r/min

3150~2850

Speed difference300 r/min

Time difference45.63 s

14.3

Result

GD2

GD2of generator

41.9 t.m2

J

Inertiaof generator

10.469 t.m2


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15 Three phase sustainedshort circuit characteristic

15.1 IEEE115-2002 ( 4.2.8 )

Procedure:

15.2

Measurement value

Field current

Stator current

(A)

Average(A)

P.U.

3317 22703 1.11

3158 21616 1.06

2979 20407 1.00

2637 18114 0.89

2222 15263 0.75

1435 9894 0.49

796 5522 0.27

669 4648 0.23

627 4369 0.21

424 2971 0.15

323 2243 0.11

0 43 0.00


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15.3Short Circuit Characteristic Curve

short-circuit characterisic

0.00

0.20

0.40

0.60

0.80

1.00

1.20

0 500 1000 1500 2000 2500 3000 3500

If(A)

I/IN

5

Fig. 5 Characteristic Curve

IFSI

Field Current at Rated Armature Current2980A


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16 SCRShort-circuit ratio and

16.1 IEEE115-2002 (10.8.1.1)

Procedure:

16.2

Computing result

SCR = Ifo / Ifk=0.54

Ifo

Ifk

In formulas

Ifo is the field current for rated voltage, rated frequency, and no load.

Ifk is the field current for rated armature current on a sustained three-phase short circuit at rated

frequency.

16.3 0.52

Criterion: As per contract, SCR0.52.

17 XdD-axis Synchronous Reactance

17.1 IEEE115-2002 (10.8.1.1)

Procedure:

17.2

Computing result

Xd =Ifk / IFg=2980/1370=2.18

Ifo

Ifk

Ifg

In formulas Ifo is the field current corresponding to the specified armature

voltage on the open-circuit saturation curve

Ifkis the field current corresponding to the specified armature

current on the short-circuit saturation curve

Ifg is the field current for the air-gap line at the specified armature

terminal voltage.


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18 Load excitation current and voltage regulation

cos0.85 0.85 0.85 0.85 0.85 0.85

Output

percentage

% 100 80 75 60 50 25

OutputMW 660 528 495 396 330 165

Terminalvoltagev 22000 22000 22000 22000 22000 22000

Armaturecurrent

A 20377 16302 15283 12226 10189 5094

sin 0.5268 0.5268 0.5268 0.5268 0.5268 0.5268

IfkA 2980 2380 2222 1780 1450 700

XP

Potierreactance

0.1488 0.1488 0.1488 0.1488 0.1488 0.1488

Ra(95)

0.001486 0.001486 0.001486 0.001486 0.001486 0.001486

EP V 25204 24507 24337 23836 23510 22730

EP* P.U 1.146 1.114 1.106 1.083 1.069 1.033

IFS A 680 560 500 410 390 300

IFGA 1370 1370 1370 1370 1370 1370

Loadexcitationcurrent

A 4464 3782 3577 3088 2780 2090

P.U 1.330 1.300 1.276 1.232 1.220 1.116

voltageregulation

factor

% 33.0 30.0 27.6 23.2 22.0 11.6


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19 Friction and windage losses

19.1 IEEE115-2002 ( 4.2.7)

Procedure

19.2

Measurement value

Speed

(r/min)

()

Hydrogen pressure

(MPa)

Hydrogen purity

(%)3000 0.45 99.4

Generator

Condition (A)

Field Current

(kW)

Friction and windage loss

Open circuit0 1072

1205.5kW

Design: Friction and windage losses


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20 PfeMeasurement of core losses at the rated voltage and frequency20.1 IEEE115-2002 ( 4.2.7)

Procedure

20.2

Measurement value

r/min

Speed

MPa

Hydrogen pressure

%

Hydrogen purity

Test Condition3000 0.45 99.4

Driving motor data

Generator data

Voltage (V)

Current(A)

Input power (kW)

Total Loss(kW)

Input power(kW)

Voltage(v)

(U/UN)2

(p.u)

10005 205.19 2904.42 621.9 2282.5 24210 1.22

10086 188.73 2616.83 574.0 2042.8 23152 1.11

10040 177.10 2339.45 529.4 1810.0 21976 1.00

10057 166.97 2192.36 504.8 1687.6 21008 0.91

10073 156.87 1984.37 471.2 1513.2 19592 0.799996 154.95 1881.91 455.2 1426.7 18728 0.73

10008 150.18 1796.46 441.4 1355.1 17548 0.64

10020 147.19 1730.52 430.7 1299.8 16521 0.56

10076 142.08 1680.43 422.3 1258.1 15411 0.49

10051 141.32 1603.52 410.5 1193.0 14246 0.42

10022 138.44 1542.89 369.7 1173.2 13060 0.35

10053 135.62 1471.03 305.2 1165.8 11083 0.25

10057 130.78 1410.37 280.7 1129.7 8745 0.16

10053 129.27 1330.45247.2 1083.2

5830 0.0710119 126.08 1328.75 246.6 1082.2 4934 0.05

10126 125.35 1289.59 218.2 1071.4 107 0.00=+

Input Power of generator= Core loss+ Friction and windage losses


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20.3Input power of generator curve

6

Fig. 6 losses Curve

Core loss at rated armature voltage745.2kW

U=0

Friction and windage losses at U=01072kW


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21 Short-circuit Losses

21.1 IEEE115-2002 ( 4.2.7)

Procedure

21.2

Measurement value

r/min

Speed

MPa

Hydrogen pressure

%

Hydrogen purity

Test Condition3000 0.45 99.4

Driving Motor Data

Generator Data

Voltage(V)

Current(A)

Input power(kW)

Total loss(kW)

Stray-load loss(kW)

Stator ohmicloss(kW)

Current(A)

(I/IN)(p.u)

10016.0 301.63 4539.7 523.5 1020.4 1997.7 22722 1.12

10007.0 285.43 4260.0 498.0 943.9 1820.0 21650 1.06

9992.5 267.39 3963.0 470.7 851.4 1642.7 20526 1.019999.0 229.47 3322.2 413.1 633.6 1277.4 18066 0.89

9960.5 198.11 2717.2 361.7 437.3 920.0 15345 0.75

1005.9 146.33 1796.1 284.7 141.7 371.6 9783 0.48

9956.0 134.13 1425.6 256.2 51.8 119.5 5569 0.27

1003.3 125.52 1299.0 246.0 19.2 35.7 3058 0.15

9986.0 128.73 1274.6 244.7 11.5 20.2 2311 0.11

1006.3 124.45 1239.7 241.5 0.0 0.0 0 0.00


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21.3 Stray-load loss

7

Fig. 7 Stray-load loss

:

From above curve:

I/IN 1.0 0.8 0.75 0.6 0.5 0.25

Stray-load loss

(kW)820.9 504.5 437.6 266.1 175.8 33.9


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22 100%80%60%Determination of generator efficiency by the separation of losses at 100%,80%and60%load

Power factor0.85 0.85 0.85 0.85 0.85 0.85

Output% 100 80 75 60 50 25

OutputkW 660000 528000 495000 396000 330000 165000

Armature current

A 20377 16302 15283 12226 10189 5094

Field currentA 4464 3782 3577 3088 2780 2090

Core losskW

745.2 745.2 745.2 745.2 745.2 745.2

Mechanical losskW

1072.0 1072.0 1072.0 1072.0 1072.0 1072.0

Stray load losskW

820.9 504.5 437.6 266.1 175.8 33.9

(95)

Armature I2R losses

kW1851 1184 1041 666 463 116

Field I2R loss kW 2008.7 1442.3 1289.9 961.3 779.0 440.2

Exciter systemkW

101.4 73.2 65.5 48.8 39.6 22.4

Total LosskW

6599 5022 4651 3760 3274 2429

InputkW

666599 533022 499651 399760 333274 167429

Efficiency%

99.01 99.06 99.07 99.06 99.02 98.55

98.8%

Guaranteed efficiency


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23 Equivalent heat runs to determine temperature rises

23.1 IEEE115-2002 (6.2.4 )

Procedure:

23.2

Test condition

Item

Zeroexcitation

Open Circuit

Short Circuit

Terminal voltage

(V) 0 21967 0

Stator current(A) 0 0 20356

Field voltage(V) 0 136.0 263.61

Field current(A) 0 1612 2970

Frequency(Hz) 49.936 49.95 49.701

Hydrogen pressure

(Mpa) 0.4456 0.4483 0.4493

H2purity% 99.8 99.7 99.4

H2cooling water inlet temperature() 21.7 23.3 21.5

H2 cooling water outlet temperature() 26.6 32.2 27.5

Flow of H2cooling water(m3/h) 60.86 132.26 237.44

Stator winding coolant Inlet flowm

3/h 0 117.0 117.5

Stator winding coolant Inlet pressure Mpa 0 0.22 0.22

Stator winding coolant inlet temperature / 25.0 43

Stator winding coolant outlet temperature / 27.0 59


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23.3 Temperature rise test data sheet

Item

Unit

Zeroexcitation

Open circuit

Short circuit

Cold gas temperature 27.1 33.05 28.9

Hot gas temperature 28.5 38.15 35.5

Max. temperature of stator winding outlet water / 30.1 53.6

(ETD)

Max. Temp. of stator winding / 32.6 57.6

Max. Temp. of core 28.0 58.1 41.0

Max. Temp. of stator end structure part 27.9 41.7 43.7

(R)

Temperature of field winding 29.7 39.4 53.7

23.4

Temperature rise

Item

Unit

Zeroexcitation

Open circuit

Short circuit

Toa Tca Tia

Temperature rise of stator winding outlet water

K / 2.0 16

Hot gas temp. rise

K 1.4 5.1 6.6

Max. Temp. rise of stator winding outlet waterK / 5.1 10.6

Temp. rise of stator windingK / 7.6 14.6

Temp. rise of core

K 0.9 25.1 12.1

Temp. rise of stator end structure partK 0.8 8.7 14.8

(R)

Temp. rise of field windingK 2.6 6.4 24.8


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23.5 Temperature rise for stator winding and field winding at rated operation condition

Unit

Calculating value

Admissible value

Temperature rise of armature windingK 22.2 70

Temperature rise of coreK 36.3 72

(R)

Temperature rise of field windingK 52.8 67

Temperature rise for rated operation condition was estimated by the following formulas.

Armature Winding Ta = Tca + TiaToa

Core T = Tca + TiaToa

Field Winding fm

fc

f

fmfcfI

I

2

23.6.

Judgment Acceptable


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SHEET 32 OF 43


24 Three phase sudden short circui t test

24.1 IEEE 115-2002 ( 11.7.1)

Procedure

24.2

Test operation condition

(V)

Terminal voltage

(A)

Steady-state short-circuit current

(A)

Field current

Before short-circuit 6626 0 422

After short-circuit0 3165 3183 3155 465

24.3

Three phase sudden short circuit wave

8

Fig. 8 Curve

24.4

Analysis of AC component of short-circuit current


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Analysis of ac component of short-circuit current

2.502.60

2.70

2.80

2.90

3.00

3.10

3.20

3.30

3.40

3.50

3.60

3.70

3.80

3.90

4.00

4.10

4.20

4.30

4.40

4.50

0 40 80 120 160 200 240 280 320 360 400

t(ms)

logIK

9

Fig. 9 Curve

24.5

Results

Reactance and time Constant

Measured Valueunsaturated

Xd%

Direct-Axis transient Reactance28.4

Xd%

Direct-Axis Sub-transient Reactance22.3

Tds

Direct-Axis Transient Short-circuit Time Constant1.08

Tds

Direct-Axis Sub-transient Short-circuit Time Constant0.022


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5Voltage recovery test25.1 IEEE 115-2002 ( 11.7.1)

Procedure

25.2

Test operation condition

short-circuitCurrent(A)

sustained voltage

(V)

Field Current

(A)

Before short-circuit

3150.7 0 465

After short-circuit

0 6913 447

25.3

Voltage recovery wave

10

Fig. 10 Voltage recovery wave


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25.4Analysis of voltage recovery wave

Voltage recovery test for time constant

3.750

3.755

3.760

3.765

3.770

3.775

3.780

0 50 100 150 200 250 300

t(ms)

logU

11 Fig. 11

25.5

Test result

Td0

Direct-Axis Transient open-circuit

Time Constant

10.85s


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6Determination of negative sequence reactance from the line-to-line sustainedshort-circuit test26.1 IEEE 115-2002 ( 10.5.4)

Procedure

26.2

Measurement value

Voltage

(V)

Current

(A)

power(W)

NegativeSequenceReactance

()

Negative SequenceReactance

average

()

124.7 425.2 50890 0.162517

192.62 654.9 120960 0.162834

310.66 1088.9 324060 0.157798

0.1610

26.3

Calculations of Negative Sequence Reactance

X P

I2 23

() X X I

U

N

N

2 2

3

( ) (p.u)

26.4

Result

X2Negative Sequence Reactance

25.84 %(unsaturated)


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7Determination ofzero-sequence reactance from the line-to-line and to neutral short -circuit test

27.1 IEEE 115-2002 ( 10.6.5)

Procedure

27.2

Measurement value

Voltage(V)

Current(A)

power(W)

Zero sequence

reactance()

Zero sequencereactanceaverage

()

32.71 436.73 610 0.07483

50.24 662.3 1520 0.07578

84.12 1091.5 4350 0.07698

0.07586

27.3

Calculations of Zero Sequence Reactanc

I

UZ 0 ()

2

1

UI

PZX OO (p.u)

27.4

Result

X0

Zero sequence reactance12.17%(unsaturated)


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SHEET 38 OF 43


28 Measurement of vibration of frame and stator core

28.1

Measurement value

P-P (m)

Vibration of statorcore

P-P(m)

Vibration of frame

Condition

Model of vibration

Vertical

Horizontal

Vertical

Overall frequency 40.61 10.53 5.89

1X21.64 10.1 5.54

Open circuit

2X33.97 2.46 1.75

Overall frequency7.16 10.08 5.6

1X3.87 9.82 5.46

Three phasesteadyshort circuit

2X

5.48 1.7 0.91

28.2 JB/T10392 15 50

Criteria Frame: Not more than 15

Stator core: Not more than 50


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SHEET 39 OF 43


29 Insulation resis tance measurement (before h.p and after H.P.)

Test condition

20.7 0.1 s/cm

Winding Temp. Cooling water conductivity

M

Insulation resistance

V

Megger

Winding Temp.

Before H.P.

After H.P.

U VW

U to V, W and ground3.1 7.4 2500 20.7

V UW

V to U, W and ground6.9 7.5 2500 20.7

Stator winding

and stator

terminal

bushings

W UV

W to U, V and round6.9 7.8 2500 20.7

30 A.C. Hi-potential test for s tator winding and stator terminal bushings after heatrun test.

30.1

Test condition

20.7 0.1 s/cm

Winding Temp. Cooling Water Conductivity

Hz

Frequency

(V)

Applied voltage

(min)

Duration

U VW

U to V, W and ground50 45000 1

V UW

V to U, W and ground50 45000 1

Stator winding

and stator

terminal

bushings

W UV

W to U, V and round50 45000 1

30.2: :2UN+1000 V

Criteria: For stator winding:


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31 Measurement of the stator and the rotor winding capacitance

31.1

Test condition

10.8

Ambient temperature:

10.8

Stator winding temperature

0.2s

The Cooling water conductivity

31.2 --

Capacitance of 1phase winding to ground and other two phases

Stator winding

Application voltage

Capacitance

U VW

U to V, W and ground13200V 214.79 nF

V UW

V to U, W and round 13200V 214.95 nF

W UV

W to U, V and round13200V 215.49 nF

31.3

Capacitance of the rotor winding

Application voltage

Capacitance

Rotor winding

4690v 1.49F


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SHEET 41 OF 43


32 Measurement of D.C resistance and insulation resis tance for RTDs32.1 :11.5

Measurement value Ambient temperature

NO.

DC R.

()

I. R.

(M)

NO.

DC R.

()

I. R.

(M)

NO.

DC R.

()

I. R.

(M)

NO.

DC R.

()

I. R.

(M)

1 104.2/0.7 66.0 26 104.7/1.2 69.6 1 B 104.1/0.7 69.0 26 B 104.1/0.8 61.4

2 104.1/0.7 68.7 27 104.5/1.1 64.7 2 B 104.1/0.7 58.0 27 B 104.1/0.8 74.9

3 104.1/0.7 74.1 28 104.5/1.2 72.1 3 B 104.1/0.7 67.7 28 B 104.2/0.8 63.0

4 104.1/0.7 72.2 29 104.6/1.2 93.1 4 B 104.2/0.8 69.6 29 B 104.1/0.8 59.4

5 104.1/0.7 54.8 30 104.5/1.2 74.5 5 B 104.2/0.8 58.7 30 B 104.2/0.7 71.1

6 104.1/0.6 51.4 31 104.3/0.9 76.8 6 B 104.2/0.8 73.3 31 B 104.0/0.6 67.7

7 104.1/0.7 70.0 32 104.4/0.9 69.2 7 B 104.1/0.7 71.0 32 B 104.1/0.6 71.5

8 104.0/0.6 69.0 33 104.4/0.9 57.4 8 B 104.2/0.8 52.2 33 B 104.0/0.6 66.6

9 104.3/0.8 70.8 34 104.4/1.0 73.0 9 B 104.2/0.7 72.0 34 B 104.0/0.5 61.3

10 104.3/0.8 75.1 35 104.5/1.0 63.3 10 B 104.2/0.7 48.8 35 B 104.0/0.6 72.1

11 104.2/0.7 72.7 36 104.3/1.0 73.6 11 B 104.2/0.8 71.1 36 B 103.9/0.6 71.4

12 104.2/0.7 70.0 37 104.4/1.0 73.3 12 B 104.2/0.7 72.0 37 B 103.9/0.5 76.5

13 104.3/0.9 70.3 38 104.4/1.0 66.8 13 B 104.4/0.9 71.5 38 B 104.0/0.6 70.314 104.3/0.8 50.9 39 104.4/1.1 64.8 14 B 104.4/1.0 56.3 39 B 103.9/0.5 70.0

15 104.2/0.9 57.7 40 104.4/1.0 56.8 15 B 104.5/1.0 65.4 40 B 103.8/0.6 72.0

16 105.2/1.2 93.6 41 104.5/1.1 75.8 16 B 104.8/1.4 49.5 41 B 104.8/1.1 51.3

17 104.7/1.3 67.9 42 104.5/1.1 75.1 17 B 104.5/1.1 66.0 42 B 104.2/0.6 71.4

18 105.1/1.2 70.2 18 B 104.5/1.1 47.4

19 104.8/1.2 55.0 19 B 104.4/1.0 62.5

20 105.0/1.2 74.0 20 B 104.3/1.0 73.7

21 104.8/0.4 72.3 21 B 104.5/1.1 50.9

22 104.8/0.4 74.0 22 B 104.0/0.6 74.0

23 104.7/1.3 74.6 23 B 104.4/1.0 68.3

24 104.8/0.4 68.2 24 B 104.4/1.0 66.4

25 104.6/1.2 76.8 25 B 104.3/0.9 73.1

32.2GB/T7064 1M

Criteria:

32.3

JudgmentAcceptable


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SHEET 42 OF 43


33 Summary of test results

1 table1

Items

Unit

Test value

Design value

Std./Cont. value

(95)

D.C. resistance of armature winding() 0.0014856 0.0015787

(95)

D.C. resistance of field winding() 0.10081 0.10259

Field current of open-circuit(A) 1600 1599.9

Field current of short-circuit

(A) 2980 3007

Short-circuit ratio0.54 0.532 0.52

Field current of full-load(A) 4464 4476.4

Friction & windage Losses(kW) 1072.0 1205.5

Core loss(kW) 745.2 900.34

Stray load loss(kW) 820.9 1424.48

(at95)

Stray ohmic losses(kW) 1851.0 1966.5

(at95)

Field ohmic losskW 2008.7 2055.8

Exciter systemkW 101.4 102

Total Loss(include excitation loss)kW 6599 7654.62

Efficiency(include excitation loss)(%) 99.01 98.85 98.8

GD2GD

2 (t-m2) 41.9 41.328

THD(%) 0.31 5

THF(%) 0.20 1.5


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1 table1

Items

Unit

Test value

Design value

Std./Cont. value

Stator winding temperature rise(K) 22.2 70

Core temperature rise( K) 36.3 72

Field winding temperature rise(K) 52.8 67

Shaft vibration(m) 64 76

Shaft voltage

(V) 4.927 20

Xd

D-axis synchronous reactance() 218.0 218.03

(X2)

Negative sequence reactance(unsaturated)

() 25.84 22.12

X0

Zero sequence reactance(unsaturated) () 12.17 9.54

Xd

Transient reactance(unsaturated)() 28.4 27.65 0.30

XdSub transient reactance(unsaturated)

() 22.3 19.63 0.15

Td

Direct-axis transient S.C. time constant (s) 1.08 1.224

Td

Direct-axis sub transient S.C. timeConstant

(s) 0.022 0.153

Td0

Transient open-circuit time constant(s) 10.85 9.65

(p-p)

Vibration of frame

(m) 10.53 15

(p-p)

Vibration of stator core (m) 40.61 50

Capacitance of stator winding

(nF) 214.95 253.6

Capacitance of rotor winding

(F) 1.49 1.3905

660MW 0.85PF Type Test Report

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Transcript of 660MW 0.85PF Type Test Report