Electrical Power Systems Quality, Second Edition phần 10 pptx

... on the secondary of a pad-mounted transformer. Power Quality Monitoring 493 V out V out V in V in Good Bad Figure 11.23 Capacitively coupled voltage dividers. 10 100 100 0 100 00 100 000 100 000 0 0.7 0.75 0.8 0.85 0.9 0.95 1 1.05 Equivalent ... programs. 0 20 40 60 80 100 120 Count 6870 6 910 6950 6990 7030 7070 7 110 7150 7190 7230 7270 7 310 7350 7390 7470 7 510 7550 7590 743...

Ngày tải lên: 08/08/2014, 15:21

... Voltage (per Unit) .01 .1 1 10 100 100 0 100 00 Crest Current (A) Figure 4.17 Crest voltage versus crest amps. 0 1 2 3 4 5 6 7 0 100 200 300 400 500 600 700 800 900 100 0 Nominal Operating Voltage ... to failure when conducting several cycles of power frequency current. 128 Chapter Four 0 102 03040506070 –20 10 0 10 20 Voltage (kV) Time (ms) 0 102 030405060 70 –400 –200 0 200 40...

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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 ... 120-V computer equipment. 0.001c 0.01c 0.1c 0.5c 1c 10c 100 c 100 0c 1␮s 1ms 3ms 20ms 0.5s 10s Steady State Duration of Disturbance in Cycles (c) and Seconds (s) Applicab...

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... 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 fails, the ... annual costs (power quality costs ϩ solution costs). Comparing the different power quality solution alternatives in terms of their total annual costs (annual power quality costs ϩ annual...

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... 5.15. 190 Chapter Five 0 5 10 15 20 25 30 35 –200 100 0 100 200 Time (ms) (a) Current (A)Current (A) 0 200 400 600 800 100 0 1200 1400 1600 1800 2000 0 20 40 60 80 100 Frequency (Hz) (b) Figure ... 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 s...

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... 8.0 50 100 10. 0 4.5 4.0 1.5 0.7 12.0 100 100 0 12.0 5.5 5.0 2.0 1.0 15.0 100 0 15.0 7.0 6.0 2.5 1.4 20.0 69 kV Ͻ V n Յ 161 kV Ͻ20* 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 ... Bank Limits: Calculated Limit Exceeds Limit Peak Voltage: 107 .0% 120% No RMS Voltage: 100 .1% 110% No RMS Current: 104 .1% 180% No kVAr: 104 .3% 135% No TABLE 5.1 Example Capacitor Eval...

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... Harmonic Control in Electric Power Systems. 3. IEEE P519A-2000, Guide for Applying Harmonic Limits on Power Systems. 4. R. C. Dugan, “Simulation of Arc Furnace Power Systems, ” IEEE Transactions ... (CENELEC); thus, they are also designated with the EN 6100 0 series. For example, IEC 6100 0-3-2 is also known as EN 6100 0-3-2. 6.8.3 IEC 6100 0-2-2 IEC 6100 0-2-2 defines compatibilit...

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... for Power Distribution in Industrial Plants, IEEE, 1993. IEEE Standard 519-1992: Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems, IEEE, 1993. IEC 6100 0-4-15, ... loads. Static var compensators (SVCs) are very flexible and have many roles in power systems. SVCs can be used for power factor correction, flicker reduction, and steady-state volt...

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... 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...

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... and Grounding Problems Sections 10. 4.1 to 10. 4.7 describe some typical power quality problems that are due to inadequacies in the wiring and grounding of electrical systems. It is useful to be aware ... Transactions on Power Apparatus and Systems, Vol. PAS-94, No. 5, September/October 1975, pp. 1843–1853. 10. IEEE Standard P1547, Distributed Resources Interconnected with Electric...

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