Electrical Power Systems Quality, Second Edition phần 8 pps

... 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. 386 Chapter ... 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 electrica...

Ngày tải lên: 08/08/2014, 15:21

... website. Voltage Sags and Interruptions 53 0. 58 1.00 0. 58 0.00 1.00 1.00 0. 58 1.00 0. 58 0.33 0 .88 0 .88 0.33 0 .88 0 .88 — — — 0 .88 0 .88 0.33 0. 58 1.00 0. 58 TABLE 3.1 Transformer Secondary Voltages with a Single-Line-to-Ground Fault ... 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,...

Ngày tải lên: 08/08/2014, 15:21

... Force, “Interharmonics in Power Systems, ” Cigre 36.05/CIRED 2 CC02 Voltage Quality Working Group, 1997. Fundamentals of Harmonics 223 0 120 240 360 480 600 720 84 0 960 1 080 1200 0.0 10.0 20.0 30.0 40.0 Frequenc y ... Supplied by Nonsinusoidal Voltages IEEE Std 18- 1 980 Capacitor Bank Data: Bank Rating: 1200 kVAr Voltage Rating: 1 380 0 V (L-L) Operating Voltage: 1 380 0 V (L-L)...

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... website. Electrical Power Systems Quality, Second Edition CHAPTER 1: INTRODUCTION What is Power Quality? Power Quality Voltage Quality Why Are We Concerned About Power Quality? The Power ... 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) 1 286 00 1 288 00 129000 129200 129400 129600 12 980 0 Figure 2.12...

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... 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 1.34 180 0 4 1.92 1.42 180 0 9 1.96 1.33 180 0 14 1.97 1. 28 SOURCE: Courtesy of Cooper Power Systems. Transient Overvoltages Downloaded ... or more of these functions, such as temperature with voltage override. Chapter 4 Source: Electrical Power Systems Quality Downloaded from Digital Engin...

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... control 1 58 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 (per Unit) Resistive Load @ 480 V BUS (% Transformer Capacity) Figure 4. 38 Example ... distortion is not a new phenomenon 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 tec...

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... Harmonic Limits on Power Systems. 4. R. C. Dugan, “Simulation of Arc Furnace Power Systems, ” IEEE Transactions on Industry Applications, November/December 1 980 , pp. 81 3 81 8. 5. M. F. McGranaghan, ... Harmonics in Power Systems, Winnipeg, Manitoba, October 1 986 . 8. D. Xia, G. T. Heydt, “Harmonic Power Flow Studies Part I—Formulation and Solution,” IEEE Transactions on Po...

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... 2.362 CP50† 43. 987 22 .81 3 12.126 5.165 1.525 25.465 18. 765 13.619 Mean 56.3 08 28. 729 18. 422 8. 926 3.694 33.293 25.390 18. 535 CP95† 135. 185 66.260 51.000 27.037 13.519 71.413 51.500 38. 2 38 Maximum 207.644 ... time. V max Ϫ V min ᎏᎏ V 0 3 18 Chapter Seven –200 –150 –100 –50 0 50 100 150 200 0.000 0.0 58 0.117 0.175 0.233 0.292 0.350 0.4 08 0.467 0.525 0. 583 0.642 0.700 0.7 5...

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... on Power Apparatus and Systems, Vol. PAS-94, No. 5, September/October 1975, pp. 184 3– 185 3. 10. IEEE Standard P1547, Distributed Resources Interconnected with Electric Power Systems, Draft 8, ... January 1 986 , pp. 2 58 264. 4. R. C. Dugan, D. T. Rizy, Harmonic Considerations for Electric Distribution Feeders, ORNL/Sub /81 -95011/4, Oak Ridge National Laboratory, U.S. DOE, March 1 9...

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... 10 kHz. End-user (secondary) sites. Transducer requirements at secondary sites are much simpler. Direct connection for the voltage is possible for 120/2 08- or 277/ 480 -V rms systems. This permits ... the instrument and immediately 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...

Ngày tải lên: 08/08/2014, 15:21