Power Quality Disturbances Assessment during Unintentional Islanding Scenarios. A Contribution to Voltage Sag Studies

Alexandre Serrano-Fontova, Pablo Casals Torrens and Ricard Bosch
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Alexandre Serrano-Fontova: Department of Electrical Engineering, Polytechnic University of Catalonia, ETSEIB - Av. Diagonal 647, 08028 Barcelona, Spain
Pablo Casals Torrens: Department of Electrical Engineering, Polytechnic University of Catalonia, ETSEIB - Av. Diagonal 647, 08028 Barcelona, Spain
Ricard Bosch: Department of Electrical Engineering, Polytechnic University of Catalonia, ETSEIB - Av. Diagonal 647, 08028 Barcelona, Spain

Energies, 2019, vol. 12, issue 16, 1-21

Abstract: This paper presents a novel voltage sag topology that occurs during an unintentional islanding operation (IO) within a distribution network (DN) due to large induction motors (IMs). When a fault occurs, following the circuit breaker (CB) fault clearing, transiently, the IMs act as generators due to their remanent kinetic energy until the CB reclosing takes place. This paper primarily contributes to voltage sag characterization. Therefore, this novel topology is presented, analytically modelled and further validated. It is worth mentioning that this voltage sag has been identified in a real DN in which events have been recorded for two years. The model validation of the proposed voltage sag is done via digital simulations with a model of the real DN implemented in Matlab considering a wide range of scenarios. Both simulations and field measurements confirm the voltage sag analytical expression presented in this paper as well as exhibiting the high accuracy achieved in the three-phase model adopted.

Keywords: power quality; voltage sags; islanding operation; induction machines; modelling; distribution networks (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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