Electrical Power Systems Quality, Second Edition phần 2 ppsx

... Nevada 1 32 0 .23 A 3LG Texas 1 32 0.33 A 2LG Tennessee 1 32 0.38 C 2LG Nevada 1 32 0.41 C 3LG Claytor 1 32 0. 42 A 1LG Tennessee 1 32 0.45 D 2LG Texas 1 32 0.48 C 3LG Glen Lyn 1 32 0.48 A 3LG Reusens 1 32 0.5 ... Nevada 1 32 0.5 D L-L Tennessee 1 32 0.5 C 2LG Claytor 1 32 0. 52 C L-L Nevada 1 32 0. 52 C L-L Texas 1 32 0.55 C 2LG Glen Lyn 1 32 0.57 C L-L Claytor 1 32 0.59 C...

Ngày tải lên: 08/08/2014, 15:21

... for the Terms and Definitions 29 0 2 4 6 8 10 Phase A Voltage 10 31 00 06:56:59 am Time (s) Voltage (V) 128 600 128 800 129 000 129 200 129 400 129 600 129 800 Figure 2. 12 Example of voltage fluctuations ... Variation 0 0 123 456 0 25 50 75 100 125 150 175 20 0 –100 –75 –50 25 0 25 50 75 100 20 40 60 80 100 120 Voltage (%) Voltage (%) Time (s) Time (ms) PQNode Local Tr...

Ngày tải lên: 08/08/2014, 15:21

... Equivalent circuit f 1 L 1 C 1 f 2 L 2 C 2 1 2 1 2 = = π π Switching frequency Natural frequency of customer resonant circuit Voltage magnification f 1 f 2 ⇔≈ V V C 2 L 1 L 2 C 2 C 1 Load Feeder Source Substation Service Transformer C 1 C 2 L 2 L 1 C 1 Figure ... when conducting several cycles of power frequency current. 128 Chapter Four 0 1 020 3040506070 20 –10 0...

Ngày tải lên: 08/08/2014, 15:21

... three- phase, 120 0-kvar, 13.8-kV capacitor bank, the positive-sequence reac- tance in ohms would be X C ϭϭϭ158.7 Ω 13.8 2 ᎏ 1 .2 kV 2 ᎏ Mvar kV 2 ᎏ Mvar 1 ᎏ 2 fC 20 2 Chapter Five 0 0. 02 0.04 0.06 0.08 0.1 0 ... presents a condition that is more difficult to control 158 Chapter Four 0 5 10 15 20 25 30 1 1 .2 1.4 1.6 1.8 2 2 .2 2.4 2. 6 2. 8 3 A B C Ferroresonant Voltage (p...

Ngày tải lên: 08/08/2014, 15:21

... 161 kV 20 * 2. 0 1.0 0.75 0.3 0.15 2. 5 20 –50 3.5 1.75 1 .25 0.5 0 .25 4.0 50–100 5.0 2. 25 2. 0 0.75 0.35 6.0 100–1000 6.0 2. 75 2. 5 1.0 0.5 7.5 Ͼ1000 7.5 3.5 3.0 1 .25 0.7 10.0 V n Ͼ 161 kV Ͻ50 2. 0 1.0 ... Յ h Ͻ 23 23 Յ h Ͻ 35 35 Յ h TDD 20 4.0 2. 0 1.5 0.6 0.3 5.0 20 –50 7.0 3.5 2. 5 1.0 0.5 8.0 50–100 10.0 4.5 4.0 1.5 0.7 12. 0 100–1000 12. 0 5.5 5.0 2. 0 1.0 15.0 Ͼ1000...

Ngày tải lên: 08/08/2014, 15:21

... order voltage h (%) h (%) h (%) 56 35 22 75 91.541 11 3.5 15 0.3 6 0.5 13 3 21 0 .2 8 0.5 17 2 21 0 .2 10 0 .2 19 1.5 12 0 .2 23 1.5 Ͼ 12 0 .2 25 1.5 25 0 .2 ϩ 1.3 ϫ 25 /h *The THD of the supply voltage ... (A) Harm Fund 3rd 5th 7th 9th 11th 13th 15th % 100.0 65.7 37.7 12. 7 4.4 5.3 2. 5 1.9 Phase –37 –97 –166 113 –46 –158 92 –51 Harm 17th 19th 21 st 23 rd 25 th 27 th...

Ngày tải lên: 08/08/2014, 15:21

... 2. 791 2. 3 62 CP50† 43.987 22 .813 12. 126 5.165 1. 525 25 .465 18.765 13.619 Mean 56.308 28 . 729 18. 422 8. 926 3.694 33 .29 3 25 .390 18.535 CP95† 135.185 66 .26 0 51.000 27 .037 13.519 71.413 51.500 38 .23 8 Maximum ... time. V max Ϫ V min ᎏᎏ V 0 318 Chapter Seven 20 0 –150 –100 –50 0 50 100 150 20 0 0.000 0.058 0.117 0.175 0 .23 3 0 .29 2 0.350 0.408 0.467 0. 525 0.583 0.6 42...

Ngày tải lên: 08/08/2014, 15:21

... 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...

Ngày tải lên: 08/08/2014, 15:21

... Inc., Quincy, Mass. 022 69. Source: Electrical Power Systems Quality Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 20 04 The McGraw-Hill ... Rural Electric Power Conference Record, IEEE Catalog No. 01CH3 721 4, Little Rock, Ark., May 20 01, Paper No. 01-A3. 7. Electrical Distribution-System Protection, 3d ed., Cooper Pow...

Ngày tải lên: 08/08/2014, 15:21

... available to the users. A smart power Power Quality Monitoring 487 0.00 2: 00 4:00 6:00 8:00 10:00 12: 00 14:00 16:00 18:00 20 :00 22 :00 0:00 Time P st 0 0.5 1 1.5 2 2.5 Figure 11.19 Flicker variations ... 6873.0806 Average: 728 4.7099 Maximum: 7600.3 726 6800 6900 7000 7100 720 0 7300 7400 7500 7600 7700 4 /26 /95 5/1/95 5/6/95 5/11/95 5/16/95 5 /21 /95 5 /26 /95 5/31/95 6/5/95 V R...

Ngày tải lên: 08/08/2014, 15:21