Electronic Theses and Dissertation

Integrasi Distributed Generation (DG) pada jaringan distribusi listrik dapat mempengaruhi kestabilan tegangan yang ditandai dengan perubahan pada Voltage Stability Margin (VSM) atau margin kestabilan tegangan pada bus-bus di jaringan. Penelitian ini mencari lokasi optimal alokasi DG berdasarkan VSM dengan memperhatikan intermitensi PLTS. Penelitian menggunakan sistem IEEE 9-bus dengan analisis VSM pada tiga tingkat penetrasi DG (10%, 20%, dan 30%) untuk mensimulasikan intermitensi PLTS. Analisis VSM digunakan untuk identifikasi bus potensi untuk penempatan DG. Optimisasi dilakukan menggunakan Voltage Performance Index (VPI) yang mengintegrasikan peningkatan VSM, perbaikan profil tegangan, dan analisis confidence level. Hasil penelitian menunjukkan Bus 6 sebagai bus paling kritis dengan VSM terendah 36,7 kW dan menjadi prioritas utama penempatan DG. Konfigurasi optimal berupa implementasi DG di semua bus dengan penetrasi 30% menghasilkan VPI tertinggi 0,020592, peningkatan kemampuan beban sistem 17,0%, dan total peningkatan VSM 286,6 kW. Analisis intermitensi membuktikan ketahanan sistem dengan VSM minimum tetap 9,3% di atas kondisi dasar pada cuaca ekstrem. Konfigurasi optimal terdiri dari DG di Bus 3 (37,5 kW), Bus 6 (27,0 kW), dan Bus 9 (30,0 kW) yang memberikan peningkatan rata-rata VSM 50% per bus.

Keyword: Distributed Generation, PLTS, Voltage Stability Margin, Voltage Performance Index

The integration of Distributed Generation (DG) into the electrical distribution network can affect voltage stability, as indicated by changes in the Voltage Stability Margin (VSM) at the buses within the network. This study seeks the optimal location for DG allocation based on VSM, taking into account the intermittency of PLTS. The research uses the IEEE 9-bus system with VSM analysis at three DG penetration levels (10%, 20%, and 30%) to simulate PLTS intermittency. VSM analysis is used to identify potential buses for DG placement. Optimization is carried out using the Voltage Performance Index (VPI), which integrates VSM improvement, voltage profile enhancement, and confidence level analysis. The results show that Bus 6 is the most critical bus, with the lowest VSM of 36.7 kW, making it the top priority for DG placement. The optimal configuration, involving DG implementation at all buses with 30% penetration, yields the highest VPI of 0.020592, a 17.0% increase in system loadability, and a total VSM improvement of 286.6 kW. The intermittency analysis demonstrates system resilience, with the minimum VSM remaining 9.3% above the base condition during extreme weather. The optimal configuration consists of DG at Bus 3 (37.5 kW), Bus 6 (27.0 kW), and Bus 9 (30.0 kW), providing an average VSM increase of 50% per bus. Keyword: Distributed Generation, PLTS, Voltage Stability Margin, Voltage Performance Index