COMPARISON OF UNINTERRUPTIBLE POWER SUPPLY RELIABILITY IN VARIOUS REDUNDANCY SYSTEMS

The paper considers several types of redundant systems for electrical engineering complexes built using uninterruptible power supplies (UPS), and examines the reliability of the selected configurations; analyses four main configurations of UPS systems, namely standard N, isolated Niz, parallel N+1, and redundant parallel 2(N+1). The results obtained in this study can play an important role in selecting and implementing UPS systems. UPS reliability parameters, such as failure rate, mean time between failures, and system availability, are assessed using the structural reliability block diagram method.