Electrical Power Systems Quality, Second Edition phần 6 pot

... Greater Than 16 A. ■ IEC 61 000-3 -6 (19 96) : Electromagnetic Compatibility (EMC). Part 3: Limits. Section 6: Assessment of Emission Limits for Distorting Loads in MV and HV Power Systems. Basic ... governing harmonic limits, includ- ing IEEE 519-1992, IEC 61 000-2-2, IEC 61 000-3-2, IEC 61 000-3-4, IEC 61 000-3 -6, NRS 048-2, 13 and EN50 160 . 14 6. 8.1 IEEE Standard 519-1992 Th...

Ngày tải lên: 08/08/2014, 15:21

... 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 ... values. 2.9 Power Frequency Variations Power frequency variations are defined as the deviation of the power system fundamental frequency from it specified nominal val...

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... highly unpredictable, data Power Quality Monitoring 469 Figure 11.9 A first-generation power line disturbance mon- itor-analyzer, the Dranetz 60 6. (Courtesy of Dranetz-BMI.) Power Quality Monitoring Downloaded ... on Chapter *National Electrical Code ® and NEC ® are registered trademarks of the National Fire Protection Association, Inc., Quincy, Mass. 02 269 . Source: Electrical...

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... C 1LG Texas 132 0 .6 D L-L Glen Lyn 132 0 .63 C 1LG Claytor 132 0 .63 D L-L Reusens 132 0 .65 C 3LG Ohio 132 0 .65 A 1LG Glen Lyn 132 0 .67 D 1LG Reusens 132 0 .67 D 2LG Arizona 132 0 .67 C 2LG Ohio 132 ... the substation. 96 Chapter Three TABLE 3.7 Reliability Indices Computed for Feeder 1 Case SAIFI SAIDI (h) Annual fuse operations 1 0.184 0.551 1.2 2 0.299 0 .66 6 6. 0 3 0.182 0.5 16...

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... the recent ideas about improving power quality, or providing custom power with superreliable main feeders, it will be necessary to put arresters on every phase of every pole. 1 06 Chapter Three Voltage ... overvoltages to appear on power systems. Figure 4 .6 illustrates some of the places where lightning can strike that results in lightning currents being conducted from the power...

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... 300 Time (ms) Current (A) dc Link Voltage during Capacitor Switching 33.3 50.0 66 .7 83.3 100.0 1 16. 7 500 550 60 0 65 0 700 750 Time (ms) Current (A) Figure 4.40 (Continued) Transient Overvoltages Downloaded ... 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. Sca...

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 60 0 720 840 960 1080 1200 0.0 10.0 20.0 30.0 40.0 Frequenc y ... manner. 6. 4.5 Harmonic analysis by computer— historical perspective The most common type of computer analysis of power systems per- formed today is some form of...

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... 0.000 0.000 0.000 5.3 16 2.791 2. 362 CP50† 43.987 22.813 12.1 26 5. 165 1.525 25. 465 18. 765 13 .61 9 Mean 56. 308 28.729 18.422 8.9 26 3 .69 4 33.293 25.390 18.535 CP95† 135.185 66 . 260 51.000 27.037 13.519 ... 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 0.333 0.500 0 .66 7 0.833 1.000 1. 167 1.333 1.500 1 ....

Ngày tải lên: 08/08/2014, 15:21

... 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. 3 86 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 electric...

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... 1404 Minimum: 68 73.08 06 Average: 7284.7099 Maximum: 760 0.37 26 6800 69 00 7000 7100 7200 7300 7400 7500 760 0 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 RMS A Figure 11. 26 Time ... many power quality analysis software programs. 0 20 40 60 80 100 120 Count 68 70 69 10 69 50 69 90 7030 7070 7110 7150 7190 7230 7270 7310 7350 7390 7470...

Ngày tải lên: 08/08/2014, 15:21