800 V, 120kVA, 3-phase, 50 Hz, salient-pole synchronous generator is used in a hydroelectric dam, converting water flow into electricity via a turbine. The reactance values (Xd and Xq) are 1.95 Ω and 1.10 Ω, respectively and the terminal current is measured to be 95 A at a power factor of 0.85 lagging. The armature resistance can be considered to be negligible (Ra =0). a) Draw the phasor diagram of the generator, b) Compute the generated voltage (Êaf) when the generator delivers its rated kVA at 0.85 lagging power factor and rated terminal voltage.

800 V, 120kVA, 3-phase, 50 Hz, salient-pole synchronous generator is used in a hydroelectric dam, converting water flow into electricity via a turbine. The reactance values (Xd and Xq) are 1.95 Ω and 1.10 Ω, respectively and the terminal current is measured to be 95 A at a power factor of 0.85 lagging. The armature resistance can be considered to be negligible (Ra =0). a) Draw the phasor diagram of the generator, b) Compute the generated voltage (Êaf) when the generator delivers its rated kVA at 0.85 lagging power factor and rated terminal voltage.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter3: Magnetic Starters

Section: Chapter Questions

Problem 30SQ

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