Voltage Stability Analysis for Kurdistan Region Power System Using Fast Voltage Stability Index
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Abstract
In any stressed power system, Identification of the weakest bus and transmission lines is very
important for planning and operation to prevent voltage collapse which leads to total blackout of
the whole system. The aim of the paper is to use a technique to determine the weakest buses of
the power system. Increasing load in power system could lead to the event of voltage collapse
which implies the contingency in the system. Increasing load and line outage contingencies are
ranked so that the line which highly affects the system could be identified. This paper proposes
to utilize an established index called FVSI (Fast Voltage Stability Index) to identify the sensitive
lines and critical line outages in the system. Test system of this paper is the KRPS-30-Bus-
132kV. The contingency ranking process can be conducted by computing the line stability index
of each line for a particular Increasing load and for line outage contingency. The contingency
which is ranked the highest implies that it contributed to the system instability.
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