#6631. Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

November 2026publication date
Proposal available till 30-05-2025
4 total number of authors per manuscript0 $

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Journal’s subject area:
Safety, Risk, Reliability and Quality;
Electrical and Electronic Engineering;
Energy Engineering and Power Technology;
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Abstract:
There are various types of distributed generators (DGs) with different grid integration strategies. The transient characteristics of the fault currents provided by the DGs are different to those of conventional synchronous generators. In this paper, a distribution network with multi-type DGs is investigated, including consideration of DG low-voltage ride through (LVRT). The fault current characteristics of two typical DGs, i.e. an inverter-interfaced distributed generator (IIDG) and a doubly-fed induction generator (DFIG), are analyzed, considering the specific operation modes. Based on analysis of the fault characteristics, an equivalent model of the multi-type DGs under symmetrical/asymmetrical fault conditions is established. A fast-iterative fault calculation method for enhancing the calculation efficiency while avoiding local convergence is then proposed using an improved particle swarm optimization (PSO) algorithm. A simulation system of the distribution network with multi-type DGs is established in PSCAD/EMTDC.
Keywords:
Equivalent model; Fast-iterative calculation method; Fault current characteristics; Improved particle swarm optimization (PSO); Multi-type distributed generators (DGs)

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