Abstract
Voltage Stability analysis is a very vital and challenging issue of the power system and maintains the stable bus voltage profile is the biggest problem. Here we applied Modal analysis, Line voltage stability indices, to study voltage collapse problem and find the weakest bus in the test bus system by using the PV curve. After investigating the weak bus, we have injected the shunt devices for maintaining the voltage profile. All parameter decided for voltage collapse by the PSAT MATLAB simulation. The modal analysis gives the Eigenvalue and Participation factor and these values help to find the weakest node in the system. Here see that smallest Eigenvalue gives the voltage collapse point and. Line Voltage stability Indices help to find the weakest line corresponding to the weakest bus. We proposed the comparative analysis of three line indices Line Stability Index, Fast Voltage Stability Index, and Line Stability or Quality Factor. The PV curve gives the voltage collapse point with and without injecting shunt devices in the test bus system.
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