GENERAL CALCULATION METHOD FOR SHORT-CIRCUIT FAULTS IN COMPLEX ACTIVE DISTRIBUTION NETWORKS

Ding Yangtian; Dai Zhihui; Liu Junyi; Ning Zhiheng; Yang Mingyu; Xu Dongrui

doi:10.19912/j.0254-0096.tynxb.2025-0560

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 417-427. DOI: 10.19912/j.0254-0096.tynxb.2025-0560

GENERAL CALCULATION METHOD FOR SHORT-CIRCUIT FAULTS IN COMPLEX ACTIVE DISTRIBUTION NETWORKS

Ding Yangtian, Dai Zhihui, Liu Junyi, Ning Zhiheng, Yang Mingyu, Xu Dongrui

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Abstract

A general calculation method for short-circuit faults is proposed, which accounts for multi-sequence network coupling and dynamic control strategy modeling. Firstly, fault equivalent models of multiple types of DGs are established, and the impacts of their low-voltage ride-through and negative-sequence current suppression strategies on sequence component networks are analyzed. Then, based on the superposition theorem, the fault network is decomposed into normal component and fault component networks, and the sequence network boundary condition equations for different short-circuit types are derived to construct a composite sequence network model incorporating IBDGs. Finally, through iterative correction of node voltages and DG injection currents, the short-circuit fault solution is achieved. Simulation results show that the proposed method has good applicability in complex active distribution networks with multiple types and multiple points of DG integration, and the calculation errors of short-circuit faults are all less than 3%.

Key words

distribution network / distributed generation / short-circuit current / iterative method / equivalent model / control strategy

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Ding Yangtian, Dai Zhihui, Liu Junyi, Ning Zhiheng, Yang Mingyu, Xu Dongrui. GENERAL CALCULATION METHOD FOR SHORT-CIRCUIT FAULTS IN COMPLEX ACTIVE DISTRIBUTION NETWORKS[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 417-427 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0560

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