The present invention relates to a method for analyzing operation reliability of a multi-state power generation system based on a decision diagram, comprising the following steps: step 1. establishing a multi-state power generation system model with reserve according to collected multi-state power generation system characteristic data; step 2. establishing a multi-state decision diagram of a power generation system according to the multi-state power generation system model with reserve established in step 1; and step 3. calculating the occurrence probability of a reliability path in the multi-state decision diagram of the power generation system established in step 2, and calculating the operation reliability of the power generation system according to the occurrence probability of the reliability path in the multi-state decision diagram of the power system. The present invention can be used for power supply systems with different state transfer rates or different state transfer time distributions. Generator sets 321 Number of generator sets States of generator sets Capacities of states of - Generatorsets generator sets /System for analyzing operation reliability of a multi-state power generation system 1. Modeling of a multi-state generator set 2. Establishment of a multi-state decision diagram of a system 3. Calculation of occurrence probability of a reliability path in the decision diagram State transfer 4. Calculation of system operation reliability characteristics of the sets System 0 in the operating mode load State transfer demand characteristics of the sets Firststate in the reserve mode transfer Generator Generator A set 1: 1-+2 esetoN r l-2 0 [setJN: Operation reliability of the multi-state power generation system • •Load ( demand
METHOD FOR ANALYZING OPERATION RELIABILITY OF MULTI-STATE POWER GENERATION SYSTEM BASED ON DECISION DIAGRAM