Voltage Stability Analysis using PSS in Imo State Nigeria Network
##article.abstract##
The action of a power system stabilizer (PSS) is to extend the angular stability limits of a power system by providing a supplementary damping to the oscillation of synchronous machine motors through the generator excitation. PSS controller design, method of combining the PSS with the excitation controller (AVR), investigation of the voltage of the network, how much load in the form of loading parameter are all done in this paper. Power system analysis toolbox (PSAT) was used to analyze the network to compare when PSS is not included and when it is included in the network. The network considered is the Imo state (Eastern part of Nigeria) network. The network consists of three (3) generators and eleven buses. After the simulation, it can clearly be seen that when PSS is not used all the buses were violated running a continuation power flow (CPF) method, but when PSS is added, there is no violation at the point of collapse. The loading factor increased when PSS is added (6.0513pu) as compared to when PSS is not added (1.0561pu). It can be concluded from the result that PSS will greatly improve the existing network both in the area of stabilizing the voltage and also to add more load into the network.
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