Reliability Analysis Of Diesel Generator Excitation Control System

In the power supply, some important occasions, like medical, communications,military and so on, ask neither power to failure nor a power outage to quickly restorepower after a few seconds, the power needs very high reliability requirements. Therefore,for improving the reliability of power supply, these occasions are generally equipped witha diesel generator as backup power.Diesel generator has the following advantages: rapidly start, and quickly reach fullpower operating state; high thermal efficiency, low operating costs, load adaptability;operation is simple, easy to automate, vibration, noise, etc. can be effectively controlled;relatively high reliability.As the diesel generator is widely used in various fields, the reliability of research hasalso been more and more attention. A diesel generator Mainly consists of diesel engine,generator, controller (including exciter and excitation control systems, etc.) and othercomponents, improving the reliability of these components can improve the reliability ofthe entire unit. To improve the reliability of the excitation control system is one of themost effective means.The paper is about a diesel generator excitation control system prepared to stop,which consists of safety monitoring system and function system components, mainly toachieve control, monitoring, protection and alarm functions. Firstly, according to thedesign principle of the system, the system is divided reliability features, thereby makingFMECA analysis, a clear system of each functional unit reliability possible failure modesand their hazards. Secondly, we analyze the design principle of the basic modules underthe functional requirements of the control system. Based on this system we take theelectromagnetic compatibility, redundant design, derating design technology to furtherimprove the system reliability. Again, discussing the use of the stand-by system andequipment maintenance once a month to improve the reliability of the system, derivatingthe formulation of calculating the quantitative reliability and designing reliability analysissoftware based on this application next month. Finally, based on the principles of basic circuit modules, we establish a block diagram of the system reliability and the success tree,carry out a quantitative reliability analysis, and the results show that on the basisconditions of each module to the design, maintenance and replacement, the requirementsof reliability index is satisfied. Besides, this paper gives a quantitative value of reliabilityindex, maintenance strategies and the reliability maintenance recommendations.