Simulation Study of Reliability Model and Optimization for Electrical Power System

An architecture with multi-parallel and multi-standby system of aircraft electrical power system is proposed, simulation study is given. First the reliability model of parallel system is formulated, and total system reliability model is obtained. Parallel subsystem number and standby subsystems number are the two parameters of reliability model. In order to maximize the system MTBF and minimize the purchase cost of each subsystem, a novel redundancy optimization function is proposed. Simulation results are analyzed to study the impact of parameters on the system reliability. Redundancy number and configuration of typical aircraft power system is also discussed from the viewpoint of application practice. Simulation result shows that the architecture is flexible, with the options to increase or decrease subsystems of parallel or standby systems to satisfy reliability and capacity requirement.