The Calculation Of Three-phase Unbalanced Power Flow With Distributed Generation Resource On Distribution Network

Distribution power flow calculation is the smart grid implementation with the basic requirements, the parameters of unbalanced three-phase distribution network, distribution network usually uses three-phase unbalanced power flow calculation model. New energy generation technology fast development, such as wind, solar ongoing rapid infiltration, an effective distribution network with distributed generation three-phase power flow calculation is a very important issue.Access to distributed generation in distribution system its radial distribution networks by the passive network into a small power supply with active networks. According to the actual situation of three-phase unbalanced distribution system, in order to accurately calculate the distributed generation into distribution network of power flow problem, This paper studies the three-phase power flow calculation of the correlation matrix, the establishment of a three distribution networks with distributed generation flow calculation model. Model considers the different types of unbalanced load, such as the constant power load, constant current load and constant impedance load model. As for distributed generation PV and PQ nodes, respectively, carried out a detailed three-phase power flow analysis and calculation. According to the distribution network topology, the use of branch layering technology to accelerate the trend of computing speed, while using sparse treatment to reduce memory requirements, the calculation speed.Papers written application of three-phase power flow, verified the improved algorithm proposed is reasonable and effective. And through specific examples of the test show that the proposed flow calculation method is feasible, the processing of network asymmetry and load asymmetry has a good effect in the power system.