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...

Ngày tải lên: 08/08/2014, 15:21

... 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...

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... 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...

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... 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...

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... 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)...

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... 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 )...

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... 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...

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... 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....

Ngày tải lên: 08/08/2014, 15:21

... 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...

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... 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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