The reliability of distribution networks can be improved by islanding of part of the network when a short-circuit fault occurs. The voltage and frequency stability during transient can be evaluated with time-domain simulations using componentbased DER and load models. However, simulations with this type of models have a relatively high computational burden which constrains periodical stability analysis of microgrids. This paper proposes an aggregation methodology which significantly decreases the computation time of fault-initiated islanding simulations with component-based models, while maintaining the nonlinear dynamics. The methodology is first validated by directly comparing the original and equivalent models during large voltage and frequency transients. Secondly, a fault-initiated islanding case study of a residential distribution network is performed. For both validations, a sensitivity analysis of model parameters and voltage variations is performed. The results indicate the methodology preserves the dynamics of DERs and loads, while significantly reducing the computational time.
|Title of host publication||Proceedings of the 21st Power System Computation Conference (PSCC)|
|Publication status||Published - 2020|
|Event||21st Power Systems Computation Conference (PSCC 2020) - Porto, Portugal|
Duration: 29 Jun 2020 → 3 Jul 2020
|Conference||21st Power Systems Computation Conference (PSCC 2020)|
|Period||29/06/20 → 3/07/20|