Estimation of Dynamic Compensation for Renewable-Based Hybrid DG in Radial Distribution System Using Least Error Iterative Method

Abstract

In this paper, wind diesel-based hybrid electrical system is proposed as distributed generator (DG) for radial distribution system (RDS). Since renewable-based DGs and especially wind operated electric generating system requires reactive power for its excitation along with the reactive power demand for maintaining the voltage profile at all buses in RDS, a fast and adequate dynamic compensation is required along with DG. The main contribution of this paper is to optimize the amount of reactive power supplied by dynamic compensator using new proposed approach of least error voltage constraint iterative approach. The paper is starting with the selection procedure of most sensitive bus satisfying three voltage stability indices fast voltage security index, line quality factor and voltage stability index followed by the selection of DG optimal size using optimization approach with multiconstraints all together, namely total real and reactive power loss, voltage limits voltage stability indices and voltage stability indices. The result shows how the dynamic compensator can maintain voltage level by releasing additional reactive power with the adjustment of firing angle for different levels for multidynamic load changes.