'Power triangle' presentation slideshows

LECTURE 10

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E E 2315

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Power Factor Correction

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Power Triangle

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Work and Power Notes

Work and Power Notes. What is work ?. The product of the force applied to an object and the distance through which that force is applied. Mowing the lawn Weight-lifting Moving furniture up a flight of stairs Pushing against a locked door Swinging a golf club. YES YES YES NO YES.

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Power Triangle

Power Triangle. Learning Objectives. Define apparent power. Calculate apparent power in AC series parallel networks. Define the power triangle. Using the power triangle determine relationships between real, reactive and apparent power.

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Example 10.6 Calculating Power in Parallel Loads

Example 10.6 Calculating Power in Parallel Loads. Load 1 absorbs an average power of 8 kW at a leading power factor of 0.8. Load 2 absorbs 20 kVA at a lagging power factor of 0.6. Determine the power factor of the two loads in parallel. The total complex power absorbed by the two loads is.

508 views • 12 slides

ELEC130 - Electrical Engineering 1

ELEC130 - Electrical Engineering 1. Week 8 Module 4 Applications in Power Systems. This Lecture. Module 4 - Applications in Power Systems Revise power triangle Examples using the power triangle & calculating Power Factor Correction Module 5 - Transients in a.c. Circuits

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Consider a circuit with a source, a load, & appropriate meters.

Relationship between P, Q, & S. Consider a circuit with a source, a load, & appropriate meters. P and Q are positive, so the load absorbs both active and reactive power. The line current I lags behind E ab by an angle ?.

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Series R, X L , Xc

Series R, X L , Xc. Combinations of series RL and Series RC. Impedance triangle Xc X L Now X T Xt = X L + (-Xc) or Xc-X L. Calculating Xt . Series RLC Diagram. Impedance Triangle For X L. Impedance Triangle for Xc. CKT Phasor Diagram. Power Triangle.

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Parallel RLC

Parallel RLC. Circuit Representation. Resistance Rt @ 0 degrees as I is in phase Inductive Reactance X L @ -90 degrees I lags Capacitvie Reactance Xc @ 90 degrees I leads Current Total Formula by use of polar form It = Ir<0 + Ixl<-90 + Ixc<90 It = __ @angle which is the p.f< of the ckt.

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Parallel RLC

Parallel RLC. Circuit Representation. Resistance Rt @ 0 degrees as I is in phase Inductive Reactance X L @ -90 degrees I lags Capacitvie Reactance Xc @ 90 degrees I leads Current Total Formula by use of polar form It = Ir<0 + Ixl<-90 + Ixc<90 It = __ @angle which is the p.f< of the ckt.

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Power Relationships

Power Relationships. P = watts S = volt-amps Q = volt-amps of reactance. Power Relationships. Resistance (R). Inductance Reactance (XL) Capacitance Reactance (Xc). Rate at which energy is being stored and returned to the ckt Inductance temporally stores energy

244 views • 7 slides