Electrical Power Systems Quality, Second Edition phần 3 pptx
Electrical Power Systems Quality, Second Edition phần 3 pptx
... range
Transient Overvoltages 1 23
–5
–4
3
–2
–1
0
1
2
3
4
5
V, per unit
Figure 4.12 Example of unstable, chaotic ferroresonance voltages.
–4
3
–2
–1
0
1
2
3
4
5
V, per unit
Figure 4. 13 Example of ferroresonance ... 9 1.97 1.45
900 14 1.98 1 .39
1200 4 1.94 1.50
1200 9 1.97 1.40
1200 14 1.98 1 .34
1800 4 1.92 1.42
1800 9 1.96 1 .33
1800 14 1.97 1.28
SOURCE: Courtesy of Cooper Po...
Electrical Power Systems Quality, Second Edition phần 10 pptx
... in many power quality
analysis software programs.
0
20
40
60
80
100
120
Count
6870
6910
6950
6990
7 030
7070
7110
7150
7190
7 230
7270
731 0
735 0
739 0
7470
7510
7550
7590
7 430
0%
10%
20%
30 %
40%
50%
60%
70%
80%
90%
100%
Cumulative ... various categories of power quality variations.
11.4 Assessment of Power Quality
Measurement Data
As utilities and industrial customers have ex...
Electrical Power Systems Quality, Second Edition phần 1 pot
... 80
–50
30
–10
10
30
50
70
Time (ms)
Current (A)
Current (A)
Max:
Min:
Avg:
Abs:
RMS:
CF :
FF :
31 3.907
–171.704
33 . 533 2
31 3.907
64 .38 62
4.87 537
1.92007
ASD Input Current Spectrum
Figure 2.10 Current waveform and harmonic ... website.
Electrical Power Systems Quality, Second Edition
CHAPTER 1: INTRODUCTION
What is Power Quality?
Power Quality Voltage Qua...
Electrical Power Systems Quality, Second Edition phần 2 ppsx
... 0 A
3LG Nevada 132 0. 23 A
3LG Texas 132 0 .33 A
2LG Tennessee 132 0 .38 C
2LG Nevada 132 0.41 C
3LG Claytor 132 0.42 A
1LG Tennessee 132 0.45 D
2LG Texas 132 0.48 C
3LG Glen Lyn 132 0.48 A
3LG ... Ohio 132 0.7 C
L-L Arizona 132 0.7 C
3LG Fieldale 132 0.72 A
L-L Ohio 132 0. 73 C
2LG Fieldale 132 0.76 C
3LG New Hampshire 33 0.76 A
1LG Ohio 132 0.77 D
3LG Vermont 33 0.77 A
L-L Fieldale 132...
Electrical Power Systems Quality, Second Edition phần 4 docx
... Capacitor Switching
33 .3 50.0 66.7 83. 3 100.0 116.7
30 0
–200
–100
0
100
200
30 0
Time (ms)
Current (A)
dc Link Voltage during Capacitor Switching
33 .3 50.0 66.7 83. 3 100.0 116.7
500
550
600
650
700
750
Time ... Low-Voltage AC Power Circuits, cites a
representative 15-ms burst composed of impulses having 5-ns rise
Transient Overvoltages 161
480-V Bus Voltage (phase-to-phase)...
Electrical Power Systems Quality, Second Edition phần 5 pps
... 100.00
3 180
0.00
0.0 0.00
5 30 0
4.00
31 8.7 20.00
7 420
3. 00
239 .0 21.00
11 660
0.00
0.0 0.00
13 780
0.00
0.0 0.00
17 1020
0.00
0.0 0.00
19 1140
0.00
0.0 0.00
21 1260
0.00
0.0 0.00
23 138 0
0.00
0.0 ... the increased losses in the power delivery system.
In the case of the linear load, the measured power is
P
measured
ϭ P
1
ϩ a
3
P
3
ϩ a
5
P
5
ϩ a
7
P
7
ϩ
. . .
(5 .33 )...
Electrical Power Systems Quality, Second Edition phần 6 pot
... 60 1.000 1.000 1.000
3 65.70 180 0.657 0. 432 3. 885
5 37 .70 30 0 0 .37 7 0.142 3. 5 53
7 12.70 420 0.127 0.016 0.790
9 4.40 540 0.044 0.002 0.157
11 5 .30 660 0.0 53 0.0 03 0 .34 0
13 2.50 780 0.025 0.001 ... 0.016
23 0.80 138 0 0.008 0.000 0. 034
25 0.40 1500 0.004 0.000 0.010
27 0.20 1620 0.002 0.000 0.0 03
29 0.20 1740 0.002 0.000 0.0 03
31 0.20 1860 0.002 0.000 0.004
Tot...
Electrical Power Systems Quality, Second Edition phần 7 pdf
... 0.000 5 .31 6 2.791 2 .36 2
CP50† 43. 987 22.8 13 12.126 5.165 1.525 25.465 18.765 13. 619
Mean 56 .30 8 28.729 18.422 8.926 3. 694 33 .2 93 25 .39 0 18. 535
CP95† 135 .185 66.260 51.000 27. 037 13. 519 71.4 13 51.500 ... T
10%
,
however, comprises only the duration of the second component, 200 ms.
0
20
40
60
80
100
120
140
0.000 0.167 0 .33 3 0.500 0.667 0. 833 1.000 1.167 1 .33 3 1....
Electrical Power Systems Quality, Second Edition phần 8 pps
... machine.
9 .3. 3 Electronic power inverters
All DG technologies that generate either dc or non power frequency ac
must use an electronic power inverter to interface with the electrical
power system.
38 6 ... key power quality issues for each type of interface are described in
Secs. 9 .3. 1 to 9 .3. 3.
9 .3. 1 Synchronous machines
Even though synchronous machines use old technology...
Electrical Power Systems Quality, Second Edition phần 9 potx
... Conference Record,
IEEE Catalog No. 01CH37214, Little Rock, Ark., May 2001, Paper No. 01-A3.
7. Electrical Distribution-System Protection, 3d ed., Cooper Power Systems, Franksville,
Wis., 1990.
8. ... Transactions on Power
Apparatus and Systems, Vol. PAS-94, No. 5, September/October 1975, pp. 18 43 18 53.
10. IEEE Standard P1547, Distributed Resources Interconnected with Electric Po...
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