 |
From the 1st of February to the 30th of June 2016, the student of ENSPY Paulin TCHOUBA carried out an academic internship at the CURES for the purpose of obtaining his Engineering diploma . His work has focused on the « development of a system of supervision and management of a hybrid micro-network». The objective is to develop in a micro-network a diagnostic system for the management of: - faults diagnosis - decision making - predictive maintenance. Indeed, to fight for the quality of energy in district hospitals in Cameroon, the CURES’ approach is to put hybrid micro-networks in place for their energy supply. But the functioning of a micronetwork can be influenced by defects and abnormalities, affecting the quality of energy. For this reason, a supervision and management system has been set up in order to ensure the proper functioning of hybrid microgrids. |
This work is focused on two main sources of energy, photovoltaic and diesel generators. After an analysis of supervisory systems encountered in the trade and an analysis of diagnostic methods found in the literature, Paulin chose the analysis of the maximum power point (for the photovoltaic system) and methods encountered in trade (for diesels). Paulin created a signature dictionary based on the comparison (S1 symptoms: lower maximum power, S2: drop in open circuit voltage, S3 fall short circuit current Duke) healthy functioning and failing a photovoltaic module and the inference diagnostic approach allowed him to develop algorithms for diagnosis of PV module.
After all this process, Paulin designed algorithms for the photovoltaic system that allowed him to diagnose eight faults on the DC side and at the AC side almost all the fault of the PV system installation. For diesels generator sets, an analysis of manufacturers has enabled the intern to set a daily monitoring of the generator set and preventive maintenance every two weeks.
