A kind of Distribution Network Reliability determination methods based on probability distribution

The invention discloses a kind of Distribution Network Reliability determination methods based on probability distribution, this determination methods is based on existing reliability judge index basis, propose following three Distribution Network Reliability judge index, and these three Distribution Network Reliability judge index are tried to achieve by analytical expression: before the system failure after working time TTSF, the system failure release time TTSR and system failure frequency SIF.The present invention is based on distribution subregion section thinking, adopt random function to carry out parsing from system-level and node layer to distribution network reliability index respectively to characterize, again further combined with nonparametric probability technology, the probability distribution achieving reliability index random function expression formula calculates.The index that this method newly proposes is the useful supplement of existing distribution network reliability index system, contributes to the overall random character that system reliability level is studied and judged in quicklook.