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Flexible Alternating Current Transmission systems (FACTS) devices have been proven to be a better approach in the improvement of the transmission of power , of which its major purpose is to compensate the reactive power of the Network. This is why this paper investigates the impact of FACTs device on Port Harcourt Network which is a State Network in Nigeria grid system. Continuation Power Flow (CPF) analysis and Eigenvalue analysis was done for proper investigation of both the impact on the load increment and behavior due to disturbances. CPF analysis shows that the Network without FACTS will violate all bus voltage with load increment of which the maximum loading is far lower as compared to when FACTS is installed. When FACTS was installed, though few of the buses voltages were violated, but, about 100% addition load improvement as compared to without FACTS. The Eigenvalue analysis done shows that the Network is prune to instability without the addition of FACTS with the presence of a negative real reduced Jacobian (JR) matrix. With the inclusion of FACTS, the system became stable with all real JR values being positive. An improvement was seen in the real and reactive power losses when using FACTS device up to the range of 0.0647pu and 0.49743pu from 1.3425pu and 1.9385pu respectively. This shows that there will be a greater advantage in using FACTS device to stabilize the Network.

Dynamic Voltage Stability Analysis of Port Harcourt Network in the Presence of Facts Devices