Voltage Characteristic Of The Active Distribution Network With Distributed Generation

New energy technologies such as photovoltaic and wind power are developing rapidly and used widely. The distributed generations as the main form is applied in power system more and more widely because of its’ numerous advantages. But the increasing number of DGs bring about some problems. The paper mainly stduies the influence on voltage profile by introducing the distributed generations into the active distribution network.Firstly, The paper introduces the basic concepts of the active distribution network of DGs and the simulation model including the distribution network model, DG model and the load model. And then analyze the voltage profile of distribution network after introducing DG with the algorithm of superposition principle, and simulated by Matlab/Simulink, mainly considers the capacity, location, power factor and the way of DG connects the distribution network.Then, the paper studies the relations of the maximum allowed access capacity and the short-circuit capacity of the connection point to estimate it’s maximum allowed access power, then analyze the voltage stability of the ADN under the maximum accessing power with different load, make use of the voltage stability index L to analysis the voltage stability of distribution system quantitative.Lastly, the paper analysises to adopt the inductive reactive power, control the power factor of the converter, bring in the auto PI regulation for voltage of grid connection point, and use the battery energy storage device to reduce the voltage so that the voltage is controlled within the requirements range, then the methods are tested by simulation, the results show all these voltage regulation measures are feasibility.