Analysis Of Reliability Of Distributed Power Supply

Distribution network is most closely associated with the power consumer which connects power systems and power consumer.Now power quality requirements are constantly increasing with the rapid social and economic development,based on this,a large number of distributed generation(DG)connected to distribution network.DG has many advantages in terms of environmental protection and reserves.But what needs to be considered is the impact on the distribution system of gird-connection particularly the reliability.Therefore,it is great significance to enhancing reliability of distribution networks with DG by evaluating the reliability of distribution network with DGThis article describes indicators of assessment of system reliability,and then minimum path algorithm is proposed to calculate assessments.The paper chooses the IEEE system as an example to analyze.The evaluation indexes are calculated and compared according to the analysis of five kinds of connection methods.It is found that the calculated results obtained by this method are negligible with the given results in the system,and this algorithm is rational.In this paper,the power supply reliability of the distribution system which is connected with DG is studied and analyzed.On the basis of the different types of DG,the constant power output model and the random power output model of the wind power system have been established.Then,according to the two models described above,the equivalent DG is connected to the grid,and the isolated island is elaborated.The mathematical model is established based on the principle of islanding and the solution method is introduced.Based on the modified IEEE-RBTS Bus 5 network,this paper calculates the change of the operating status of the distribution network before and after the DG is integrated into the distribution network,and obtains that the islanding is reasonable and can improve the reliability of the distribution network in conclusion.