Consider the four-bus sample system in the figure wherein line reactance indicated are in pu. Treat this as a simplified power flow problem where line resistances are considered negligible and the magnitude of all the four bus voltages are specified to be 1.0 pu. Find the value of reactive power supplied by generator 4 (QG4). JO.15 J02 0.15 J0.1 wl-1.0 Real Demand Reactive Demand Real Generation Reactive Bus Generation Po- 2.0 Pa = 1.0 Pos = 1.0 Po= 2.0 Co = 05 Con = 10 P=? Pe=0.0 Pa40 Pa= 0.0 Qej (unspecified) Qez (unspecified) Qes (unspecified) Qa (unspecified) 1. 2. 3. Qo =04 4. 0.8388 pu -32.17 pu 1.16117 pu 34.17 pu

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