A field hospital is supplied by electricity from a single working generator of constant failure rate λ = 0.0005 per hour. Power is required 24 hours per day. Preventive maintenance is carried out at six-week intervals. To ensure that the electric power supply is at least 95% reliable throughout this period, it is decided to introduce extra generators on cold standby. The failure rate of the generator on cold standby is negligible. The reliability of the switching mechanism is 0.98 per demand. Determine the minimum number of standby generators required to meet the reliability performance target.

A field hospital is supplied by electricity from a single working generator of constant failure rate λ = 0.0005 per hour. Power is required 24 hours per day. Preventive maintenance is carried out at six-week intervals. To ensure that the electric power supply is at least 95% reliable throughout this period, it is decided to introduce extra generators on cold standby. The failure rate of the generator on cold standby is negligible. The reliability of the switching mechanism is 0.98 per demand. Determine the minimum number of standby generators required to meet the reliability performance target.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter11: Transient Stability

Section: Chapter Questions

Problem 11.19P

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