Electrical Power Systems Quality, Second Edition phần 4 docx
Electrical Power Systems Quality, Second Edition phần 4 docx
... on power systems.
Concern over distortion has ebbed and flowed a number of times dur-
ing the history of ac electric power systems. Scanning the technical lit-
erature of the 1930s and 1 940 s, ... waveform
distortion for many seconds and has been known to excite system res-
onances.
5 .4 Power System Quantities under
Nonsinusoidal Conditions
Traditional power system quantities su...
Electrical Power Systems Quality, Second Edition phần 1 pot
... (Hz)
Freq:
THD :
RMSh:
RMS :
ASUM:
TIF :
IT :
60
19 .47 13Fund:
41 .00 54
7.9 843 1
21. 044 8
37.3698
42 7.213
8990.61
PWMASD45>VSRCA-BUSA (Type 9)
40 50 60 70 80
–50
–30
–10
10
30
50
70
Time (ms)
Current ... (www.digitalengineeringlibrary.com)
Copyright © 20 04 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.
Electrical...
Electrical Power Systems Quality, Second Edition phần 2 ppsx
... 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 Reusens 132 0.5 A
1LG Nevada 132 0.5 D
L-L ... The incoming ac power
is rectified into dc power, which charges a bank of batteries. This dc
power is then inverted back into ac power, to feed the load. If the incom-
ing ac power fai...
Electrical Power Systems Quality, Second Edition phần 3 pptx
... (pu)
900 4 1.95 1.55
900 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 Power Systems.
Transient ... cycles of
power frequency current.
128 Chapter Four
0 10203 040 506070
–20
–10
0
10
20
Voltage (kV)
Time (ms)
0 10203 040 5060
70
40 0
–200
0
200
40 0
Cur...
Electrical Power Systems Quality, Second Edition phần 5 pps
... in
Conference Record, 19 94 IEEE Industry Applications Society Annual Meeting,
Denver, October 19 94, pp. 2273–22 74.
4. IEC 61000 -4- 7, Electromagnetic Compatibility (EMC)—Part 4- 7, “Testing and
Measurement ... “Interharmonics in Power Systems, ” Cigre
36.05/CIRED 2 CC02 Voltage Quality Working Group, 1997.
Fundamentals of Harmonics 223
0 120 240 360
48 0
600 720 840 960 1080
1200...
Electrical Power Systems Quality, Second Edition phần 6 pot
... 1.000 1.000
3 65.70 180 0.657 0 .43 2 3.885
5 37.70 300 0.377 0. 142 3.553
7 12.70 42 0 0.127 0.016 0.790
9 4. 40 540 0. 044 0.002 0.157
11 5.30 660 0.053 0.003 0. 340
13 2.50 780 0.025 0.001 0.106
15 ... 0.018 0.000 0.0 94
19 1.10 1 140 0.011 0.000 0. 044
21 0.60 1260 0.006 0.000 0.016
23 0.80 1380 0.008 0.000 0.0 34
25 0 .40 1500 0.0 04 0.000 0.010
27 0.20 1620 0.002 0.000 0.003
29 0...
Electrical Power Systems Quality, Second Edition phần 7 pdf
... 135.185 66.260 51.000 27.037 13.519 71 .41 3 51.500 38.238
Maximum 207. 644 103 .40 5 70.535 56.311 35.689 149 .48 8 140 .768 140 .768
*Submitted for IEEE Standard P15 64.
8
†CP05, CP50, and CP95 are abbreviations ... 0.000 0.000
CP05† 11.887 5.5 94 0.000 0.000 0.000 5.316 2.791 2.362
CP50† 43 .987 22.813 12.126 5.165 1.525 25 .46 5 18.765 13.619
Mean 56.308 28.729 18 .42 2 8.926 3.6 94 3...
Electrical Power Systems Quality, Second Edition phần 8 pps
... the distribution sys-
tem power quality. While the energy conversion technology may play
some role in the power quality, most power quality issues relate to the
type of electrical system interface.
Some ... 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 Systems Quality, Second Edition phần 9 potx
... Transactions on Power
Apparatus and Systems, Vol. PAS- 94, No. 5, September/October 1975, pp. 1 843 –1853.
10. IEEE Standard P1 547 , Distributed Resources Interconnected with Electric Power
Systems, Draft ... Generation and Power Quality 43 1
Figure 9.37 Protection scheme for a large synchronous generator with high-
side recloser.
81 O/U 27/59 47 59 I 59 N
25
46 50/51V
DG
87G
32R...
Electrical Power Systems Quality, Second Edition phần 10 pptx
... immediate information dissemination. Both types
of power quality data assessment are described in Secs. 11 .4. 1 and
11 .4. 2.
49 4 Chapter Eleven
Power Quality Monitoring
Downloaded from Digital Engineering ... various categories of power quality variations.
11 .4 Assessment of Power Quality
Measurement Data
As utilities and industrial customers have expanded their power
quality...
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