Study On Island Division Of Active Distribution Network With Distributed Generation

As the development of economy and the improvement of people’s quality of life,with the increasing demand for energy,distributed power generation(distributed generation,DG)has gradually entered the public view and become an important energy supply.How to make full use of DG for the benefit of mankind is today’s top priority.If the distribution network fails,it can make the DG produce the planned isolated island to continuously supply electric energy for the load,which can not only make the power system run stably,but also make full use of the distributed power supply.The development of distribution network can be promoted to a great extent by establishing reasonable island division method of distribution network.Because the output power of distributed power supply is seriously affected by environmental factors and has great randomness and uncertainty,the randomness and uncertainty of output power of distributed power supply are considered in this paper.Firstly,an island partition model with the aim of maximum power supply recovery is established,and the corresponding island partition criterion is satisfied.In order to solve the optimal isolated island range,the residual power of energy storage device and the output power of distributed power supply are predicted according to the estimation of load power and output power of distributed power supply Charge and discharge power.Finally,the IEEE 33 node distribution system is used as an example to analyze the load loss and partial load loss of the whole network,and the results of island partition are analyzed in different scenarios and periods.In order to verify the effectiveness of the proposed model and algorithm,compared with the other two literatures,the results show that the method can meet the operational requirements well,and the result of island partition is better than the other two methods.The effectiveness of the proposed algorithm and model is verified.