A Reliability Index Deviation Allocation Method for Distribution System with Distributed Generation

The access of distributed generation will increase the complexity of reliability evaluation, which will affect the accuracy of theoretical reliability evaluation value. Therefore, it is necessary to allocate the deviation between the true value and the theoretical value of the reliability index to the parameters of each component, and to correct the parameters purposefully that are allocated to more deviations. In this paper, firstly, the reliability model of distributed generation is established. Then, the improved proportional allocation method is used to calculate the contribution rate of each parameter to the system index, and the index deviation is allocated based on this. Next, after eliminating the parameters that contribute more to the deviation, the values of these parameters are calculated inversely through establishing the optimization model by using the known system reliability indexes, realizing the correction of the parameters. Finally, a distribution system for RBTS Bus 6 is introduced as standard case to demonstrate the accuracy of the proposed method.