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Sanayi ve Ticaret A. .
WEST QURNA 2 EARLY PRODUCTION FACILITIES
GAS TURBINE POWER PLANT GTPP
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ENKA
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SIEMENS
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8015 0151 81 PO EZS0 0001 Q
IQ303 000 PO EZS0 0001 Q
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Sheet
Rev.
G77121 P 0100 U 00
25682
Test Report No 2010-47
Type Test
of a 145 kV- Cable System
Consisting of
Two Outdoor Terminations, a Straight
Joint, Compact Sealing End and XLPECable
Client:
Südkabel GmbH
Rhenaniastr. 12-30
68147 Mannheim
Reporter:
Dr.-Ing. R. Badent
Dr.-Ing. B. Hoferer
This report includes 26 numbered pages and is only valid with the original signature.
Copying of extracts is subject to the written authorization of the test laboratory. The test
results concern exclusively the tested objects.
25683
1 Purpose of Test
A 145 kV- Cable System consisting of two outdoor terminations, a straight joint,
compact sealing end and XLPE-cable was subjected to a type test according to
IEC 60840 04/2004 type test on accessories.
2 Miscellaneous Data
Test object:
–
–
–
–
–
–
Outdoor Sealing End, type EHFVC 145, 30 Sheds
Drawing No 0.36.72.8a, dated 08.07.2010, Figure 2.1
Outdoor Sealing End, type EHFVC 170, 45 Sheds
Drawing No 0.36.72.8a, dated 08.07.2010, Figure 2.1
Straight Joint, type: SEHDV 145
Drawing No 0.3600.35.2a, dated 04.08.2010, Figure 2.2
GIS Compact Sealing End, type EHSVS 145
Drawing no: 0.360.01.0a, dated 19.06.2009, Figure 2.3
150-kV-XLPE-cable, type 2XS(FL)2Y 1x2500RMS/220
87/150kV, cable 1, Figure 2.4 – 2.5
132-kV-XLPE-cable, type 1x2500 RMSCu/XLPE/
corr.Al/PE 76/132/145 kV, cable 2, Figure 2.6
Figure 3.1 shows the mounting of
accessories on the two cables.
Manufacturer:
the
different
Cable 1 and accessories:
Südkabel GmbH
Rhenaniastr. 12-30
68147 Mannheim
Cable 2:
Taihan Electric Wire Co Ltd.
Insong Building 194-15, Hoehyeon-dong 1-ga
Jung-gu, Seoul, Korea
Place of test:
University of Karlsruhe
Kaiserstraße 12 – 76128 Karlsruhe
Testing dates:
Delivery:
Mounting:
Test date:
26.07.2010
26.07. – 23.08.2010
26.08. – 29.09.2010
25684
Atmospheric
conditions:
Temperature:
Air pressure:
rel. humidity:
18°C - 25°C
980 - 1020 mbar
30% - 70%
Representatives
Dipl.-Ing.(FH) A. Jurtschin, Südkabel GmbH
Dr.-Ing. R. Badent
Dr.-Ing. B. Hoferer
Mr. O. Müller
25685
Figure 2.1: Outdoor Sealing End, Type EHFVC
25686
Figure 2.2: Straight Joint, Type SEHDV 145
25687
Figure 2.3: GIS Compact Sealing End, Type EHSVS 145
25688
Figure 2.4: XLPE-Cable 1, type 2XS(FL)2Y 1x2500RMS/220 87/150kV
25689
Figure 2.5: XLPE-Cable 1, type 2XS(FL)2Y 1x2500RMS/220 87/150kV
25690
Figure 2.6: XLPE-Cable 2, type 1x2500 RMSCu/XLPE/ corr.Al/PE 76/132/145 kV
25691
Tests:
Test volume, chronological order and requirements conform to IEC
60840 04-2004 type test on accessories, subclause 14.3.2
Pos. 1
Check on insulation thickness
Pos. 2
Partial Discharge Test
û / 2 = 1,75 U0 = 133 kV 10 s thereafter ;
û / 2 = 1,5 U0 = 114 kV
no detectable discharge
Pos. 3
Heating cycle voltage test
Load cycle: 24 h
8h loading up to 95°C - 100 °C conductor temperature with at
least 2h at 95°C-100°C
16h cooling
Test voltage: û / 2 = 2,0 U0 = 174 kV
Number of cycles: 20
Pos. 4
Partial Discharge Test
û / 2 = 1,75 U0 = 133 kV 10 s thereafter ;
û / 2 = 1,5 U0 = 114 kV
no detectable discharge
Pos. 5
Partial Discharge Test at elevated temperature
8h loading up to 95°C - 100 °C conductor temperature with at
least 2h at 95°C-100°C
û / 2 = 1,75 U0 = 133 kV 10 s thereafter ;
û / 2 = 1,5 U0 = 114 kV
no detectable discharge
Pos.6
Lightning impulse voltage test at elevated temperature
T = 95°C-100°C, at least 2h, û = 650 kV,
10 impulses each polarity
Pos.7
AC-voltage withstand test during cooling period
û / 2 = 2,5 U0 = 190 kV, t = 15 min
Pos. 8
Cable and accessory examination
25692
3
Mounting
The cable preparation, assembling and mounting of the cable system was accomplished by technicians of Südkabel GmbH. Fig 3.1 shows the test setup
Fig 3.1: Schematic of test setup
25693
4
Test Setup
4.1 Check on Insulation Thickness
The insulation thickness was measured as described in IEC 60811-1-1, subclause
8.1. For measuring the insulation thickness a profile projector with a magnification
of 10 was used which allowed a reading of 0.001 mm.
4.2 AC Voltage Withstand Test
The test voltage was generated by a 720-kVA transformer. The voltage was
measured with a capacitive divider (CH = 351 pF; ratio = 10.000:1) and a peak
voltmeter reading û / 2 . The primary side of the AC-transformer was connected
to a motor-generator set consisting of a variable frequency DC motor and a synchronous generator with variable excitation. The generator delivers voltages from
0 ... 500 V with currents up to 1000 A.
Figure 4.2: Test-setup for AC-voltage withstand test and PD measurement
AC-transformer:
500V/600kV; SN = 720 kVA
Voltage measurement: CH = 351 pF; ratio 10.000:1
uncertainty 3 %
PD measurement:
CC = 1000 pF; UN = 800 kVrms
uncertainty 5 %
25694
4.3 Partial-Discharge Test
The PD-measurement was performed with an analog bridge according to
,
Figure 4.3. External PDs producing common mode signals at the detector are
rejected by the differential amplifier. Internal PDs represent differential mode
signals and are amplified. The background noise level at 133 kVrms was 2,0 pC.
Figure 4.3: Scheme of PD test circuit
TO :
Test object
CC :
Coupling Capacitor
For balancing the bridge a calibrating impulse with qA = 1000 pC is applied
between the terminals A (high-voltage) and C (ground) and the amplifier output is
minimized. A pulse between the terminals A and C corresponds to an external
PD. For the calibration a PD pulse, qA = 5 pC, is applied between A and B. Subsequently, the amplifier output of the PD measuring unit is adapted to the applied
pulse.
25695
4.4 Cyclic Current Loading
According to IEC the test objects must be heated by a current which provides the
permitted service temperature of the tested cable plus 5 K - 10 K, that means
95°C - 100°C, for XLPE-cable. The required heating current I was determined via
a dummy cable. A 8 m sample of the cable used for the test, was provided with a
1 mm diameter drilling hole down to the center conductor. The temperature was
measured with a thermo couple NiCr-Ni. . Two other thermocuples were installed
on the conductor of the reference cable 0,5 m away from the middle and 1,0 m
away from the middle. The difference between the three readings was less than
1°C. Furthermore two additional thermocouples NiCr-Ni were placed on the outer
sheath of the cable, one on the dummy and one on the test loop. Figure 4.4
illustrates the temperature rise at the conductor with a maximum heating current
of I = 3900 A, 8h. Current inception was accomplished by two transformers (U1 =
400 V; U2 = 20 V) which used the cable as secondary winding. The current was
regulated by a control unit and measured by a current transformer, 5000/1, and a
digital multimeter. The measurement uncertainty was 1%.
25696
Figure 4.4: Heat cycle I = 2700..3300 A regulated, 8h; I = 0A, 16 h
1: Conductor temperature cable1; 2: Jacket temperature test loop, cable 1
3: Jacket temperature dummy, cable 1; 4: Temperature HV-laboratory
5: Conductor temperature cable 2; 6: Jacket temperature test loop, cable 2
7: Jacket temperature dummy, cable 2
25697
4.5 Lightning Impulse Voltage Test
For lightning impulse testing 8 stages of a Marx generator (Haefely) with a
maximum cumulative charging voltage of U = 1600 kV and a maximum impulse
energy of Emax = 80 kW s were used. The crest value of the impulse voltage was
measured by a damped capacitive divider and a subsequent impulse peak voltmeter (Haefely). The front time and the time to half value were evaluated from the
oscillographs.
CH
Marx
Generator
RH
CL
IPV
Oscilloscope
TO
RL
Figure 4.5.1: Scheme of lightning impulse voltage test circuit
CH: 1200 pF ; RH = 70
; ratio: 3215;
IPV: impulse-peak-voltmeter (Haefely) – measurement uncertainty 3%
Oscilloscope: Tektronix TDS 3044B – measurement uncertainty 2%
The waveform parameters were determined at reduced charging voltage. Figure
4.5.2 shows the front time, Figure 4.5.3 the time to half value for positive polarity
each. Figure 4.5.4 shows the front time, Figure 4.5.5 the time to half value for
negative polarity each.
Positive impulse: :
T1 = 3,81 s
T2 = 55,2 s
Negative impulse:
T1 = 3,64 s
T2 = 55,4 s
25698
Figure 4.5.2:
Front time, positive polarity
horiz.: 1 s/Div; vert.: 2V/Div; probe 10:1; ratio 3215:1
Figure 4.5.3:
Time to half value, positive polarity
horiz.: 10 s/Div; vert.: 2V/Div; probe 10:1; ratio 3215:1
25699
Figure 4.5.4:
Front time, negative polarity
horiz.: 1 s/Div; vert.: 2V/Div; probe 10:1; ratio 3215:1
Figure 4.5.5:
Time to half value, negative polarity
horiz.: 10 s/Div; vert.: 2V/Div; probe 10:1; ratio 3215:1
25700
5
Results
5.1 Check on Insulation Thickness
The test was carried out as described in 4.
Test date:
03.08.2010
5.1.1 Cable 1
Nominal value:
15,2 mm
Measured Values:
14,52 mm
14,65 mm
15,07 mm
14,97 mm
14,08 mm
14,15 mm
Average Value:
14,57 mm
Result:
The average value is 4,2% lower than the
nominal value, so no correction was necessary
5.1.2 Cable 2
Nominal value:
20,0 mm
Measured Values:
19,81 mm
19,78 mm
19,42 mm
19,87 mm
20,26 mm
19,99 mm
Average Value:
19,86 mm
Result:
The average value is 0,7% lower than the
nominal value, so no correction was necessary
25701
5.2 PD-Test
The test was carried out as described in 4.
Test date:
26.08.2010
Calibration pulse:
qcal = 5 pC
Background noise level:
2.0 pC
Test voltage:
û / 2 = 133 kV; t = 10 s, thereafter
û / 2 = 114 kV; with pd reading
PD:
no detectable discharges
The test was passed successfully
5.3 Heating cycle voltage test
The test was carried out as described in 4.
Test date:
Test voltage:
Heating current:
28.08. – 16.09.2010
û / 2 = 174 kV
I = 2700..3300 A regulated, 8h
I = 0A, 16 h
Cycle:
8 h heating; 16 h cooling
Number of cycles:
20
Neither breakdown nor flashover occurred.
The test was passed successfully
5.4 PD-Test
The test was carried out as described in 4.
Test date:
21.09.2010
Calibration pulse:
qcal = 5 pC
Background noise level:
2.0 pC
Test voltage:
û / 2 = 133 kV; t = 10 s, thereafter
û / 2 = 114 kV; with pd reading
PD:
no detectable discharges
The test was passed successfully
25702
5.5 PD-Test at elevated temperature
The test was carried out as described in 4.
Test date:
24.09.2010
Calibration pulse:
qcal = 5 pC
Background noise level:
2.0 pC
Heating current:
I = 2700..3300 A regulated, 8h
Temperature:
T = 99.5°C
Test voltage:
û / 2 = 133kV; t = 10 s, thereafter
û / 2 = 114 kV; with pd reading
PD:
no detectable discharges
The test was passed successfully
25703
5.6 Lightning Impulse Voltage Withstand
temperature
Test
at
elevated
This test was carried out as described in 4.
Test date:
24.09.2010
Test voltage:
û = 650 kV
Heating current:
I = 2700..3300 A regulated, 8h
Temperature:
T = 99.7°C
Impulse:
1-5 s / 40-60 s
Number of tests:
10 positive polarity, 10 negative polarity
Neither flashover nor breakdown occurred at the test objects during all lightning
impulse voltage tests.
Table 5.6.1 shows the test results with positive polarity, table 5.6.2 with negative
polarity.
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
charging voltage / kV
30,0
30,0
48,3
67,8
87,0
96,7
96,7
96,7
96,7
96,7
96,7
96,7
96,7
96,7
96,7
û / kV
202
202
324
456
585
651
651
651
650
650
651
650
650
650
650
Figure
5.6.1
5.6.1
5.6.1
5.6.1
5.6.1
5.6.2
5.6.2
5.6.2
5.6.2
5.6.2
remark
front time,
time to half value
50%
70%
90%
1. 100%
2. 100%
3. 100%
4. 100%
5. 100%
6. 100%
7. 100%
8. 100%
9. 100%
10. 100%
Table 5.6.1: Lightning impulse voltage withstand test, positive polarity
25704
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
charging voltage / kV
û / kV
- 30,0
- 30,0
- 48,3
- 67,8
- 87,0
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 96,7
- 202
- 202
- 324
- 455
- 586
- 650
- 650
- 649
- 650
- 650
- 650
- 650
- 650
- 650
- 650
Figure
5.6.3
5.6.3
5.6.3
5.6.3
5.6.3
5.6.4
5.6.4
5.6.4
5.6.4
5.6.4
remark
front time,
time to half value
50%
70%
90%
1. 100%
2. 100%
3. 100%
4. 100%
5. 100%
6. 100%
7. 100%
8. 100%
9. 100%
10. 100%
Table 5.6.2: Lightning impulse voltage withstand test, negative polarity
Figure 5.6.1:
100%-stress 1 - 5, positive polarity
Hor.: 10 s/Div; Vert.: 5V/Div; probe 10:1; ü = 3215
25705
Figure 5.6.2:
100%-stress 6 - 10, positive polarity
Hor.: 10 s/Div; Vert.: 5V/Div; probe 10:1;ü = 3215
Figure 5.6.3:
100%-stress 1 - 5, negative polarity
Hor.: 10 s/Div; Vert.: 5V/Div; probe 10:1; ü = 3215
25706
Figure 5.6.4
100%-stress 6 - 10, negative polarity
Hor.: 10 s/Div; Vert.: 5V/Div; probe 10:1; ü = 3215
5.7 AC Voltage Withstand Test during Cooling Period
The test was carried out as described in 4.
Test date:
25.09.2010
Temperature:
26.4°C
Test voltage:
û / 2 = 190 kV; t = 15 min
Neither breakdown nor flashover occurred.
The test was passed successfully.
5.10 Cable and Accessory Examination
Test date:
27.09. – 29.09.2010
On completion of the electrical tests the XLPE insulation of the cable and the
accessories were examined. There was no evidence of electrical activity.
The test was passed successfully.
25707
6 Conclusion
The 145 kV- Cable System consisting of 150kV-XLPE-cable, Outdoor Sealing End
type EHFVC, Straight Joint type SEHDV and GIS Compact Sealing End type
EHSVS, manufacturer Südkabel GmbH, passed all tests described in Chapter 2
successfully. The test object fulfilled the requirements according IEC 60840 042004, type test on accessories.
Karlsruhe, 08.11.2010
Dr.-Ing. R. Badent
Head of Department
„High Voltage Dielectric Testing“
Dr.-Ing. B. Hoferer
Vice-Head of Department
„High Voltage Dielectric Testing“
25708