An On-Line Sensor Fault Detection System for an AC Microgrid Secondary Control Based on a Sliding Mode Observer Model

John Bravo (), Leony Ortiz (), Edwin García, Milton Ruiz and Alexander Aguila
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John Bravo: Faculty of Engineering in Mining, Petroleum and Environmental Geology, Universidad Central del Ecuador, Quito 170129, Ecuador
Leony Ortiz: Electrical Engineering Department, Smart Grid Research Group—GIREI, Salesian Polytechnic University, Quito 170702, Ecuador
Edwin García: Electrical Engineering Department, Smart Grid Research Group—GIREI, Salesian Polytechnic University, Quito 170702, Ecuador
Milton Ruiz: Electrical Engineering Department, Smart Grid Research Group—GIREI, Salesian Polytechnic University, Quito 170702, Ecuador
Alexander Aguila: Electrical Engineering Department, Smart Grid Research Group—GIREI, Salesian Polytechnic University, Quito 170702, Ecuador

Energies, 2024, vol. 17, issue 15, 1-19

Abstract: The current study proposes a strategy for sensing fault detection in the secondary control of an isolated Microgrid based on a high-order Sliding Mode Robust Observers design. The proposed strategy’s main objective is to support future diagnostic and fault tolerance systems in handling these extreme situations. The proposal is based on a generation system and a waste management system. Four test scenarios were generated in a typical Microgrid to validate the designed strategy, including two Battery Energy Storage Systems in parallel, linear, and non-linear loads. The scenarios included normal grid operation and three types of sensing faults (abrupt, incipient, and random) directly affecting the secondary control of a hierarchical control strategy. The results showed that the proposed strategy could provide a real-time decision for detection and reduce the occurrence of false alarms in this process. The effectiveness of the fault detection strategy was verified and tested by digital simulation in Matlab/Simulink R2023b.

Keywords: battery energy storage systems; distributed generation; microgrids; secondary control; sensing fault detection; sliding mode observers (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: 2024
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