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Chapter: Power System Operation and Control - Real Power Frequency Control

Two Area Systems - Tie-Line Power Model

Consider two inter connected areas as shown in figure operating at the same frequency fl while a power Power flow from area I to area 2

TWO AREA SYSTEMS - TIE-LINE POWER MODEL



Consider two inter connected areas as shown in figure operating at the same frequency fl while a power Power flow from area I to area 2

 

let V1 and V 2 be the voltage magnitudes

 

δ1, δ 2 voltage phase angles at the two ends of the tie-line While P flows from area I to area 2 then,


Where X is the reactance of the line. If the angles change by f1o1, and f102 due to load changes in areas I and 2 respectively. Then, the tie-line power changes by

 



 



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