Applied Research On The Reconfiguration Distribution Network With Distributed Generations

Distribution network is generally open loop operation, closed-loop design, in order to meet the line voltage, current and network topology and other restrictive conditions for the premise, to take the switch in the network to change the different state of the way, the reconfiguration of distribution network, and then to reduce the network loss, eliminate overload, improve power quality, balanced load. With the development of the society, more and more distributed power supply is connected, which leads to the normal operation of the distribution network.Based on the analysis of the structure characteristics of the distribution network, the improved genetic algorithm is improved. This improvement is mainly reflected in:(1) the optimization of the number of chromosome based on the ring network of encoding solutions, reduce the probability of infeasible solutions, and then improve the encoding efficiency; (2) in the algorithm to introduce the optimal reservation strategy, and to join the taboo list, can reduce the duplication, and speed up the algorithm. Taking the IEEE33 node and the PG&E69 node system as an example, the influence of the distributed power access on the network loss and reconfiguration scheme is analyzed by MATLAB simulation.Based on the actual data of Lanzhou distribution network, the effect of DG on the loss and voltage level of Lanzhou distribution network is analyzed. The reconstruction of lOkV distribution network in Lanzhou city is carried out, and the optimal scheme of distribution network operation mode is improved.The software platform of distribution network reconfiguration is developed by using C++ program language. The interface is friendly, interactive and user-friendly. The development of the distribution network reconfiguration software interface is friendly, intuitive, easy to operate and reconstruct the user. Distribution network model, which can be used for distribution network reconfiguration, can be used to obtain the optimal operation mode of distribution network.