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# ELECTRIC POWER EE 3410

LSU

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This 4 page Study Guide was uploaded by Kaci Terry on Tuesday October 13, 2015. The Study Guide belongs to EE 3410 at Louisiana State University taught by E. Mendrela in Fall. Since its upload, it has received 54 views. For similar materials see /class/223163/ee-3410-louisiana-state-university in Electrical Engineering at Louisiana State University.

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Date Created: 10/13/15

EE 3410 Topics for MidSemester Test 1 Power generation 1 Generation of force and voltage in the linear system expressions for induced voltage and force equivalent circuit of the system numerical problem 2 Synchronous generator construction and principle of operation time functions of three phase voltages induced in the winding and their phasor diagrams 3 phase circuits 1 Circuit diagrams of source voltages and load impedances connected in star Y and delta A relations between the phase currents and line currents phase voltages and lineto line voltages in Y and A connected balanced load phasor diagrams of currents and voltages active reactive and apparent power in Y and A system for balanced load 3 Symmetrical components in threephase unbalanced systems matrix equations for calculation of symmetrical components from unbalanced voltages and currents phasor diagrams 4 Methods of power measurements in 3phase 3 wire and 4 wire systems with balanced and unbalanced currents Synchronous generator 1 Equivalent circuit of the stator winding of synchronous generator voltage equation and phasor diagram for an inductive load lagging power factor resistive load unity ower factor and caacitive load leadin ower factor l H 7739 0 Vi lr Vlsl 7 41 Power factor control of synchronous generator connected to th nfinite bus phasor diagram at constant active power constant voltage and constant frequency drawn for different field currents IaIf Vcurves characteristics drawn for different active powers operation of synchronous machine as synchronous condenser 7 phasor diagrams illustrating the change of reactive power with the field current variation Operation of synchronous machine as an independent generator VI characteristics for different power factors 4 Note Theoretical questions available to choose and counted around 40 and numerical problems around 60 will be for the test Numerical problems will concern the calculation of voltages currents and power in 3phase balanced and unbalanced star and delta connected load EE 3410 Topics for MidSemester Test 2 I Synchronous generator 1 Connection of a synchronous generator to the in nite bus Conditions which should be met by voltages at two sides of the switch before switching on the generator Show what happens if one them is not satis ed 2 Numerical problems related to the numerical examples and home works calculations at variable eld currents and maximum power 11 Magnetic circuits 1 Ohm s law and Kirchhoff s law for magnetic circuits 2 Equivalent magnetic circuit of electromagnetic device with single loop 3 A simple numerical problem on magnetic circuit with one or two coils III Inductor 1 Equivalent circuit of the real inductor voltage equation and phasor diagram 2 Power losses in the core how they relate to the ux density and to frequency IV Transformer Equivalent circuit of an ideal transformer a simple numerical problem 2 Relationship between the turns ratio voltage ratio and current ratio 3 Equivalent circuit of the real transformer without magnetic link and with all parameters referred to the primary side the expressions for secondary parameters current voltage leakage reactance resistance and load impedance referred to the primary side voltage equations for primary winding and secondary winding phasor diagram of currents and voltages for inductive load corresponding with the equivalent circuit 5 Opencircuit test circuit diagram equivalent circuit equations that allow to determine the equivalent circuit parameters 6 Shortcircuit test circuit diagram equivalent circuit equations which allow determining the circuit parameters Simpli ed equivalent circuit of transformer in onload condition Phasor diagram of currents and voltages for this simpli ed circuit for pure resistive inductive and capacitive load VI characteristics of the transformer 4 gt1 EE 3410 Topics for Final Exam Fall 2009 I 3 phase circuits 1 N E Circuit diagrams of source voltages and load impedances connected in star Y and delta A Relations between the phase currents and line currents phase voltages and linetoline voltages in Y and A connected balanced load phasor diagrams of currents and voltages active reactive and apparent power in Y and A system for balanced load Symmetrical components in threephase unbalanced systems matrix equations for calculation of symmetrical components from unbalanced voltages and currents phasor diagrams Methods of power measurements in 3phase 3 wire and 4 wire systems with balanced and unbalanced currents II Synchronous generator N E 4 V39 0 gt1 Generation of force and voltage in a simple linear system expressions for induced voltage and force equivalent circuit of the system numerical problem Synchronous generator construction and principle of operation of salient pole and cylindrical rotor machine time functions of three phase voltages induced in the winding and their phasor diagrams Equivalent circuit of the stator winding of synchronous generator voltage equation and phasor diagram for an inductive load lagging power factor resistive load unity power factor and capacitive load leading power factor Equation for an active power and torque developed by a synchronous machine Torquepower angle characteristics for different excitation current If Power factor control of synchronous generator connected to the in nite bus phasor diagram at constant active power constant voltage and constant frequency drawn for different field currents IaIf Vcurves characteristics drawn for different active powers operation of synchronous machine as synchronous condenser 7 phasor diagrams illustrating the change of reactive power with the field current variation Numerical problems related to the numerical examples and home works calculations at variable field currents and maximum power Operation of synchronous machine as an independent generator characteristics for different power factors V1 111 Magnetic circuits E 4 EMF and Rm equations expressed in terms of current magnetic field length and permeability Ohm s law and Kirchhoff s law for magnetic circuits Equivalent magnetic circuit of electromagnetic device with single loop magnetomotive force equation 11 Kirchhoff s low relevant for this circuit A simple numerical problem on magnetic circuit with one or two coils IV Inductor l a VzIz characteristics for an inductive resistive and capacitive load voltage regulation efficiency in terms of secondary power and power losses 9 Three phase transformer construction types of connections of 3phase winding 10 Autotransformer circuit diagram 2 ways of power transmission power transmitted by induction and by conduction ll Instrumentation transformers voltage and current transformers V1 Transmission of Electrical Energy 1 Types of power lines corona effect lightning and prevention 2 Equivalent circuit of transmission line resistive line inductive lines and compensated inductive lines the maximum power transfer for these three types of power lines 3 Power transfer between two systems conditions for power transfer Note The Final will last 2 hours and will consist of two parts Part I 7 theoretical questions no calculators are allowed to this part must be returned before starting part 11 around lhr Part II 7 numerical problems on 3phase circuits synchronous generator and singlephase transformer

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