Involves The Distributed Generation Of The Distribution System Reliability Evaluation

Distribution system as one important part of the power system,is the important link for the whole power system and the user contact to users supply electricity, it's power supply reliability level discretion has a direct relationship with the user .Meanwhile in environmental and energy two big problems in recent years, the driving of distributed power generation technology obtained very big development, and is considered the development direction of future power system. Because of the distributed power is usually installed near the user's side in, so will the original power system especially distribution system has important influence.As a large number of DG access power distribution, the power distribution from a FuSheShi network into a network of around power, Meanwhile reliability analysis and calculation of the model and the method has changed. Island is a new operation mode in distribution network after Introducing DG technology. Plan formed island can reduce the power area, improving power supply reliability. Island which divide is the primary distribution network reliability DG calculation. This paper expounds the island power is at fault classification principles, mathematic model and divided island process.At present for distribution network reliability evaluation algorithm of research, while it is comparatively mature, but the distributed power access makes the reliability of the computation analysis produced change. Because of the distribution network access position DG access and operation mode, access is different, the reliability of the evaluation also will produce great differences. The existing isn't a good analytical algorithm to solve this problem, and Monte Carlo simulation method has higher accuracy, though but needs a long simulation time. Based on the analysis of the existing calculation method is proposed, Presents a method to calculate the distributed power distribution system with the reliability index which based on"bayesian network". This method can well compensated for lack of traditional methods, Not only can the distribution system reliability evaluation, but also identify the weak links of the system. This paper bayesian network based on the establishment of the main failure modes consequences analysis, by using VC++ programming and direct formation, save trouble in the process of analysis the distribution system complex problems.RBTS IEEE test system choose finally the F4 Lord feeder bus six distribution system as an experiment system for verification .Finally choose the F4 Lord feeder six of RBTS IEEE test system as an experiment system for verification, the calculation results show that this algorithm is correct.