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Unformatted text preview: Power Systems I Power System Analysis c Fundamentals of Power Systems (EEL 3216) r basic models of power apparatus, s transformers, synchronous machines, transmission lines r simple systems s one feeder radial to single load c What more is there? r large interconnected systems s multiple loads; multiple generators r why have large interconnected systems? s reliability; economics r analysis of the large system s flow of power and currents; control and stability of the system s proper handling of fault conditions; economic operation Power Systems I Modern Power Systems c Power Producer r generation station s prime mover & generator s stepup transformer c Transmission Company r HV transmission lines r switching stations s circuit breakers s transformers c Distribution Utility r distribution substations s stepdown transformers r MV distribution feeders s distribution transformers Power Systems I Network Layout c HV Networks r Large quantities of power shipped over great distances r Sharing of resources s Improved reliability s Economics of large scale c MV Networks r Local distribution of power r Numerous systems s Economics of simplicity s Autonomous operation c Loads r Industrial & Commercial r Residential Power Systems I System Control c Network Protection r Switchgear s instrumentation transformers s circuit breakers s disconnect switches s fuses s lightning arrestors s protective relays c Energy Management Systems r Energy Control Center s computer control s SCADA  Supervisory Control And Data Acquisition Power Systems I Computer Analysis c Practical power systems r must be safe r reliable r economical c System Analysis r for system planning r for system operations r requires component modeling r types of analysis s transmission line performance s power flow analysis s economic generation scheduling s fault and stability studies FAMUFSU College of Engineering Chapter 2 AC Power Power Systems I SinglePhase Power Consumption ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 { } ( 29 { } ( 29 v v m m i v i v i v m m i v m m i m v m t I V t I V t p I I V V t I V t p B A B A B A t t I V t i t v t p t I t i t V t v + + + + = = = = + + + = + + = + + = = + = + = 2 sin sin 2 cos 1 cos ) ( 2 2 2 cos cos ) ( cos cos cos cos cos cos ) ( ) ( ) ( cos ) ( cos ) ( 2 1 2 1 2 1 energy flow into the circuit energy borrowed and returned by the circuit i ( t ) v ( t ) Power Systems I Average Active (Real) Power ( 29 { } ( 29 ( 29 { } ( 29 ( 29 ( 29 I V P pf I V P dt t dt t dt t t I V dt t p P t I V t I V t p v v v v = = = = = + + + + = = + + + + = cos cos sin cos sin 2 sin cos 2 cos 1 ) ( 2 1 sin 2 sin cos 2 cos 1 ) ( 2 2 2 2 Power Systems I...
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 Spring '11
 THOMASBALDWIN

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