Steady-state availability of a system with two subsystems working alternately
Abstract The authors have considered the reliability aspect of a system with two subsystems working alternately in the previous paper in this issue. As the system was modelled on an electric power system with two subsystems of hydroelectric power supply and thermal electric supply, the steady state availability of the system assumes importance. We have a system consisting of two subsystems working alternately. In model I, no subsystem works in the period of working of the other. In model II, subsystem 2 is switched on when subsystem 1 fails in its working period. When a unit of subsystem 1 is repaired, it continues to work in its period and subsystem 2 is off line. On the other hand if subsystem 2 fails in its working period, subsystem 1 is not switched on. The availability expressions for both models are derived.