Abstract
The big hospitals’ electricity supply system’s reliability is discussed in this article through Petri nets and Fuzzy Inference System (FIS). To simulate and analyse an electric power system, the FIS Mamdani in MATLAB is implemented. The advantage of FIS is that it uses human experience to provide a faster solution than conventional techniques. The elements involved are the Main Electrical Power, the Generator sets, the Automatic Transfer Switches (ATS), and the Uninterrupted Power Supply (UPS), which are analysed to characterize the system behaviour. To evaluate the system and identified the lower reliability modules being proposed, a new reliable design model through the Petri Nets and Fuzzy Inference System approach. The resulting approach contributes to increasing the reliability of complex electrical systems, aiming to reduce their faults and increase their availability.
Highlights
The electric power system plays a strategic function in a big European hospital.the managers have an extreme interest in maintaining the electricity system working correctly
According to the Department of the Army, maintenance is defined as “those operations and actions that directly retain the appropriate activity of an item or renewing that operation when it is disturbed by failure or some other anomaly—within the context of RCM, the necessary process of an object means that it can perform its intended function” [3]
To obtain a minimal situation, we have considered three elements: (i) the order of events governed by a useful relation of cause and effect in the system, (ii) the list of activities of the scenario must be minimal, and (iii) the final marking corresponding to the feared state must be minimal” [37]
Summary
The electric power system plays a strategic function in a big European hospital. the managers have an extreme interest in maintaining the electricity system working correctly. The power source system must be designed to be very reliable to maintain the system working with maximum availability. The structure of the paper is the following: Section 1 presents the introduction; Section 2 presents state of the art—the maintenance concepts, the maintenance activity in a hospital, the reliability and availability of maintenance systems, the Petri nets system, and the fuzzy Petri nets and fuzzy logic system; Section 3 describes the electrical power system of a big European hospital—the characterization of the hospital, the hospital electrical system modelling using block diagrams, the group of generators, the automatic transfer switch (ATS), and the uninterrupted power supply (UPS); Section 4 presents the modelling of the hospital’s electrical system using the Petri nets software simulator HiPS description, the modelling of the hospital’s electrical system using Petri nets, the explanation of the hospital electrical system, and the modelling and analysis using fuzzy logic; Section 5 presents the conclusions, including proposals for future developments
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