STUDY OF SINGLE DISTRIBUTED GENERATION ALLOCATION METHOD IN RADIAL DISTRIBUTION SYSTEM USING VOLTAGE STABILITY INDEX

• Main Author: C A HUTAGALUNG (NIM : 13204240); Pembimbing : Dr. Ir. Mukmin Widyanto A., DENNIS
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/15330
• Institution: Institut Teknologi Bandung

Allocation of Distributed Generation at critical voltage bus in radial distribution system is not always manifest maximum increase in system voltage stability, voltage profile, and normal operation loadability. Therefore, a method to identify optimal allocation of DG should be determined. This Final Project propose a Voltage Stability Index (VSI) formula implemented in proposed method and represent voltage stability at one bus or radial system <br /> <br /> <br /> overall, and also derived from two approaches. First approach is relative distance between operational voltage and critical voltage. This critical voltage is obtained from continuation Newton’s method which effectively obtain the bifurcation point of ill-conditioned power flow solution. Second approach based on the stability of mathematically power flow quadrate equation where discriminant (D) > 0. The equation is distinguished in two condition, bus receive power from one source (main generator), while other from two sources (after DG <br /> <br /> <br /> connection). Applying distribution parameter such as wide range of R/X ratio, total result VSI could be calculated based on this two approaches. Set value of this index also between 0 and 1. 0 represent instability, while 1 otherwise. Continuously, the proposed method use this index to locate DG at n candidate buses with lowest critical voltage and optimal bus obtained after the system indicate in highest incrementing VSI of all buses. Study case in 14, 24, and 34 buses radial system will demonstrate the effectiveness of this method clearly.