EEE471Ch6-1

EEE471Ch6-1 - Typical case studies to determine: How...

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1 POWER FLOW Chapter 6-1
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2 POWER FLOW PROGRAMS A power flow program provides a steady state solution of a power system for one set of conditions. This is called a case . A group of cases is used to make a study The principal uses of power flow studies are: Study the operation of an existing system Plan the required facilities for a future system
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6 POWER FLOW CASES Power flow cases are designated as: Base case: All facilities in service and normal loading Operating case or contingency case: Cases with lines, generators or transformers out. Cases with variations in load and generation schedules.
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Unformatted text preview: Typical case studies to determine: How generated power would flow to the loads If voltages will be within tolerances If additional var sources or var absorption will be required If any facilities will be overloaded 7 POWER FLOW PROGRAM A power flow program determines the voltage magnitude and angle at every bus in the system. Knowing these all other quantities of interest can be found E k P G Q G P G Q L Z 1 Z 2 E 1 E 2 I 1 P1 Q 1 Z E E I K 1 1-= then * 1 1 1 1 I E S jQ P K = = + Etc. for all other branches...
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EEE471Ch6-1 - Typical case studies to determine: How...

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