Reliability allocation is an important part of the reliability design of DC disconnector base system

the re-sult directly affects the design of the whole machine. In order to accurately grasp the DC disconnector base system re-liability optimization allocation results under certain constraint conditions

the reliability allocation method based onthe DC disconnector base system is established

firstly

it is based on FTA and FMEA fault analysis results

the fail-ure factors of each component are determined

then the reliability target is assigned to each component according tocertain mathematical formula

and to achieve the overall reliability of the DC disconnector base system is effectivelyassigned to the various parts. The method not only combines the two methods of fault analysis with FTA and FMEA

but also improves the original reliability allocation function

it improves the reliability of the distribution efficiencyand makes the distribution result more reasonable.