Voltage Quality in Electrical Power Systems by Professor J. Schlabbach, M. Daly, P. Anderson PDF

By Professor J. Schlabbach, M. Daly, P. Anderson

El libro trata profundamente el tema de las perturbaciones relacionadas con l. a. calidad de tensión, armónicos e interarmónicos, fluctuaciones de tensión entre otros, es libro teórico práctico porque a cada tema en specific existe un ejemplo de aplicación a l. a. vez estándariza cada perturbación analizada. Recomiendo el libro a todos los amantes de los angeles investigación de perturbaciones eléctricas

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Extra info for Voltage Quality in Electrical Power Systems

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C. c. c. s. value of the phase-to-earth voltage of the three-phase side. e. c. 13) α is the control angle (control angle α = 0° means the natural gate-controlled turn-on time). c. circuit is purely inductive, then a current for each T/3 (120°) will flow in the thyristor branches; the individual blocks of each branch are shifted by T/3 (120°). These current blocks also flow in the input lines on the supply side of the three-phase bridge. 14) where n = 1, 2, 3, . . and the number of pulses p is the number of commutations occurring during a network period.

Simulation of consumers is only necessary in special cases. The calculation of equipment data from name plate data or tabulated data is preferred. Various systems of units are available for calculation. e. voltage U, current I, impedance Z and power S, with the units Volt, Ampere, Ohm and Watt, which are linked to each other by Ohm’s law and the power equation. e. Relative quantity = quantity/reference quantity Because the four quantities, voltage, current, impedance and power, required for system calculations are linked to each other, two reference quantities are required to specify a relative system of units.

Attenuation d and quality Q of the parallel resonant circuit are defined in a similar way to the series resonant circuit. 17) and the impedance has thus dropped to the √2-times value. 16) Introduction 27 The current through the individual components of the parallel resonant circuit increases as the resonant frequency is approached. The currents in this case are calculated as follows. 51b) IL I = 2 The amount of the current IL due to the inductivity or IC through the capacitor is, under certain circumstances, substantially greater than the amount of the total current I, depending on the quality of the resonant circuit in the vicinity of the resonant frequency.

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