A Multi-Objective Approach for Voltage Stability Enhancement and Loss Reduction Under PQV and P Buses Through Reconfiguration and Distributed Generation Allocation

Akhilesh Kumar Barnwal,Mitresh Kumar Verma,Lokesh Kumar Yadav

doi:10.1109/access.2022.3146333

Akhilesh Kumar Barnwal, Mitresh Kumar Verma + Show 1 more

Open Access

https://doi.org/10.1109/access.2022.3146333

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Abstract

This paper proposes a novel approach of voltage stability enhancement and power loss minimization in addition to maintenance of good voltage profile in radial distribution networks through optimally placed distributed generation, network reconfiguration and voltage control of PQV bus through variable reactive power source at P bus. A multi-objective function has been proposed that considers maximum system loadability enhancement and network loss minimization. Optimization of proposed multi-objective function, under distributed generation and network reconfiguration with presence of PQV and P buses in the system have been done using grey wolf optimization technique. Case studies performed on IEEE 33-bus radial distribution system shows that presence of PQV and P buses in the system yields significant enhancement in voltage stability margin under optimal placement of distributed generations and network reconfiguration.

Highlights

The continuously increasing demand in transmission as well as distribution network has rendered many planning and operational challenges such as maintaining voltage stability, network loss reduction and voltage profile improvement
According to IEEE/CIGRE joint task force, “Voltage stability is defined as the ability of a power system to maintain steady voltages at all buses in the system after being subjected to a disturbance from a given initial operating condition" [1]
In order to overcome this research gap, this paper proposes a multi-objective fitness function to enhance maximum loadability and reduce network losses by reconfiguration and distributed generations (DGs) unit allocation under presence of P and PQV buses in the system

Summary

Introduction

The continuously increasing demand in transmission as well as distribution network has rendered many planning and operational challenges such as maintaining voltage stability, network loss reduction and voltage profile improvement. The increased load of the distribution network and other disturbances creates risk to voltage instability of the network due to deterioration of voltage profile in significant part of the network. Voltage stability is a key issue in radial distribution networks as increase in demand may deteriorate voltage at remote buses to unacceptable limits leading to partial/complete blackout [2]. Remote end buses of radial distribution networks undergo very low voltages that poses threat of voltage instability as system may reach maximum loadability limit under contingencies [7]. Proper strategy is required to enhance maximum loadability of these networks

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Conclusion