Automatic network capacitive balancing technique for resonant grounded power distribution systems

Md Abdul Barik*, Ameen Gargoom, Md Apel Mahmud, Md Enamul Haque, Martin Cavanagh, Hassan Al-Khalidi, Aman Maung Than Oo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This study presents an automatic network balancing technique to limit the capacitive unbalance in resonant grounded power distribution systems (RGPDSs). The aim of this capacitive balancing technique is to minimise the unbalance current through the line to ground (which is the current through the neutral of the system) in order to automatically limit the neutral voltage. The proposed technique is designed by combining the weighted-sum technique and genetic algorithm (GA), where distributed switched capacitor banks (SCBs) are used for balancing RGPDSs. The proposed technique is employed to optimise available SCBs for limiting the network unbalance at the substation under a pre-defined threshold considering all possible network configurations. The unbalances at different locations of the network are also minimised to limit the system unbalance within the threshold due to minor changes in network parameters. Since the lifetime of capacitor banks relies on the switching, the proposed technique is designed in such a way that the system balance is achieved with the minimum switching. The performance of the proposed technique is evaluated through simulation studies in MATLAB/SimpowerSystems environment. Simulation results show that the proposed technique works well and capable to maintain the capacitive balance of the system with changes in network configurations.

Original languageEnglish
Pages (from-to)6158-6167
Number of pages10
JournalIET Generation, Transmission and Distribution
Volume14
Issue number25
Early online date7 Dec 2020
DOIs
Publication statusPublished - 22 Dec 2020
Externally publishedYes

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