Transcription of SECTION 9: ELECTRICAL POWER DISTRIBUTION
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SECTION 9: ELECTRICAL POWER DISTRIBUTION
ESE 470 Energy DISTRIBUTION SystemsSECTION 9: ELECTRICAL POWER DISTRIBUTIONK. WebbESE 470 Introduction2K. WebbESE 4703 The ELECTRICAL Grid Three main components to the ELECTRICAL grid Generation ESE 450 Transmission Transmission Subtransmission DISTRIBUTION Primary DISTRIBUTION Secondary DISTRIBUTION Different voltage levels at each Connected by transformersK. WebbESE 4704 Transmission Network Provides bulk powerfrom generators to the grid Interconnection point between separate utilities or separate generators POWER bought and sold at this level High voltage for low loss, long-distance transmission kV Generator step up transformers at POWER plant High POWER MVAper three-phase circuit Transmission network terminates at bulk-poweror transmission substationsK.
Primary function of the electrical power system is to supply the exact amount of power required to satisfy demand Constantly fluctuating load Adequate power quality and reliability must be maintained Ancillary services: all of the secondary functions of the electric utilities necessary to ensure power quality and reliability
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