Study On The Influence Of Distributed Generation Connect Urban Distribution Network

Distributed generation connect urban distribution network,effectively avoiding the conventional power from the city to send a long distance,long transmission time and other adverse conditions for the flexible operation of the distribution network to provide a management method.Construction of safe and stable distributed generation,on the one hand can effectively reduce the line loss of electricity,reduce power investment,improve efficiency,on the other hand can also provide practical value for energy conservation.Therefore,it is of practical value to study the line loss of distributed generation in urban distribution network.On the basis of extensive access to information,the paper studies the traditional line loss calculation method of power grid,evaluates the advantages and disadvantages and the application possibilities.Analyzes the working characteristics of various distributed generation,power transformer and power grid structure,and derives corresponding according to the equivalent circuit And the convergence model and the range of the deviation of the three different power flow methods are compared and analyzed.The principle of the pre-push back to generation method is used to design the power flow level of the power grid.And the iterative calculation method of line loss.According to the actual situation of the distribution network,the processing mode of the nodes after different distributed generation access to urban distribution network is put forward.The PQ node can be widely used,and the PV node is only applicable to some generation types.Based on the actual parameters of the actual distribution network in area A and B,the calculation of the distribution network topology is analyzed through the simulation platform,and the power line damage before and after the distributed generation is analyzed.Reasonable choice to access the distributed generation after the operation of the comparative demonstration,which proposed that the grid enterprises in the assessment of distributed power access program should be simulated by parameter calculation to calculate the line loss after access to the situation,resulting in distributed power Of the preferred access scheme.Through the theoretical analysis and case study,it is found that the distributed generation can effectively reduce the power loss of the distribution network.Combining with the actual situation,selecting the specific type of distributed generation and selecting the appropriate distribution network operation mode will help the economic operation of the power grid.