Abstract
This paper offers an enhanced voltage stability assessment index (VSAI) and loss minimalize condition (LMC) centered integrated planning approach. The proposed method aims at the simultaneous attainment of voltage stability, loss minimizations and various other related objectives with the employment of multiple distributed generation (DG) units, in mesh distribution systems (MDS). The approach presents two enhanced VSAI expressions based on a multiple-loops configured equivalent MDS model. The main objective of each VSAI expression is to find the weakest buses as potential candidates for single and multiple DG placements with initial optimal DG sizes for aimed objectives attainment in MDS. Later, mathematical expressions for LMC have been presented, based on equivalent MDS model. The LMC aims to achieve significant loss minimization with optimal DG sizes and attain negligible voltage difference across tie-line branches via reduction of respective loop currents. The proposed integrated VSAI-LMC based planning approach is employed with two computation variants and tested on two well-known, 33-Bus and 69-Bus, test distribution systems (TDS). The performance analysis of each TDS is conducted with two cases and respective scenarios, across various performance evaluation indicators (PEIs). The paper also offers a comparative analysis of achieved numerical outcomes of the proposed planning approach with the available research works found in the literature. The numerical results attained have better performance in comparison with the presented literature data and thus shows the effectiveness and validity of the proposed planning approach.
Highlights
In distribution system (DS) planning and operation stages, steady voltage stability across feeders and power loss minimization are the foremost important issues that must be addressed as a priority
The values associated with respect to load flow, aiming at radial distribution systems (RDS), loop arranged distribution systems (LDS) and mesh distribution systems (MDS) cases are achieved from equivalent models in the ATP/EMTP simulation framework
The main aim of this section is to offer a big picture of MDS centered technique technique via comparison on the basis of performance evaluation across various multiple performance evaluation indicators (PEIs), as via comparison on the basis of performance evaluation across various multiple PEIs, as aforementioned aforementioned in previous sections
Summary
In distribution system (DS) planning and operation stages, steady voltage stability across feeders and power (both active and reactive) loss minimization are the foremost important issues that must be addressed as a priority. An integrated planning approach along with an improved variant is presented in References [33,34], comprising of graph-partitioning and integer-programming, aims to address operational efficiency and reliability perspectives with a micro-grid (MG) topology planning (MTP) method to optimize the LDS based. The VSI centered-method and loss minimalize condition (LMC) based integrated planning approach is recommended for single loop configured LDS in Reference [38]. The approach in Reference [38] aims at simultaneously achieving an increase in optimal DG penetration, voltage maximization (U_Max), loss minimization (L_Min) in a single loop based LDS, and is supported by evaluations of various performance metrics. 5, the DG (sitting and size) viewpoints and assessment (with discussion), performed under various performance attained numerical results regarding the effectiveness of the proposed approach is evaluated with metrics, is demonstrated test distribution the(with comparison of theperformed proposedunder planning multiple.
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