No abstract

In this work, transient stability analysis of industrial generator units is carried out using rigorous simulation study. The effect of Solar Distributed Generator Units on transient stability of captive power units is studied in this work. Industrial system with 39 Buses is considered with one utility bus, and nine captive generation units. The total active power load of the system is 121.57 MW and reactive power demand is 56.6 MVAr. The work is carried out in two stages. In the first stage, Critical Clearing Times (CCTs) are obtained without introducing any DG. In the second stage, CCTs are obtained with four Solar Power DGs at four different load buses. Triple line to ground faults at 9 Generator buses and 7 load buses are considered for obtaining Critical Clearing Times (CCT). It is observed that transient stability of system is improved by placing DGs. For the faults on Generator buses, CCTs are improved by 14.6% with DGs on average. For the faults on load buses, CCTs are improved by 27% with DGs on average. The detailed results are tabulated in this paper.