Abstract
This paper proposes a Multi Object Particle Swarm Optimization (MOPSO) to find the optimal location and capacity of Distributed Generation and D-STATCOM device. The objective function has adapted with a multi -objectives function to improve voltage profile, the voltage stability and reduce the total power loss of the Radial Distribution System (RDS). Basically, the voltage stability index (VSI) has been used to pre-determine the optimal location of DG and D-STATCOM. Then, a MOPSO applies to achieve the suitable size of DG and D-STATCOM units with different load models. The proposed method is compared with other existing methods and it was obtained losses reductions and enhancement voltage stability and average voltage when was tested on IEEE 33-bus and real Iraqi 65-bus radial distribution system through simulation using MATLAB. Furthermore, different cases were considered for using the (MOPSO) algorithm at different load factors.
Highlights
The electrical distribution system is one of the main parts of the power system has a very high R/X ratio it causes high voltage drop and power losses which lead to voltage fluctuation, sag and instability.[1]
Three different cases have been considered for adding Dispersed generators (DG) and D-STATCOM as presents below
The above enhancement comes from the impact of adding one DG (Type one PV generator) with 2460 kw(location) Ploss (kW) as an optimal capacity in 26th as an optimal place that determines by the proposed method
Summary
The electrical distribution system is one of the main parts of the power system has a very high R/X ratio it causes high voltage drop and power losses which lead to voltage fluctuation, sag and instability.[1]. Different techniques have been suggested by planners for mitigating distribution systems loss and enhancement the voltage system stability issues. Shunt capacitors have been used to compensate the reactive power in distribution grids to mitigate loss and improve power factor These shunt capacitors are not capable to constantly produce a variable reactive power and exhibits some operational problems like resonance [2]. The optimal placement and the size of these devices have a great impact on the improvement of the distribution system performance such as minimizing of the distribution systems losses, enhancement the voltage stability and maintaining the voltage profile within acceptable limits [6]. Further research on using the (VSI) and Whale Optimization (WOA) was developed to select the proper location and best size of DG to enhancing the voltage stability and increase the load ability through injecting the appropriate active and reactive powers.
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