| With the gradual depletion of primary energy,people pay more and more attention to the research and utilization of new energy sources.And with the rapid development of economy,the reform of the electric power industry is also quietly carried out,the popularity of smart grid,the integration of distributed power supply is the old old distribution network gradually changed.The trend of the traditional one-way flow gradually becomes non directional,because this change has a great impact on the distribution network,such as power quality,relay protection devices,etc.So it is necessary to study the problem of reactive power optimization in distribution network.Firstly,this paper analyzes the present situation of domestic and international distributed energy and the trend of the future.Then,the mathematical model of reactive power optimization and its calculation method are compared,and the advantages and disadvantages of various algorithms and their characteristics are expounded.Then from the voltage distribution,relay protection,power quality,power supply reliability and other aspects of the impact of distributed power distribution network into the analysis.Then,the four typical distributed power supply mathematical models and their interface models are compared and analyzed.Finally,we discuss the types of nodes in the distribution network,and prove the correctness and rationality of the above discussions with a practical example.In this paper,the concept of static voltage stability is introduced to analyze the change of the voltage amplitude and the static voltage stability of the same node before and after the three kinds of distributed power supply access to the IEEE33 bus system..It is concluded that PI/PQ/PV three types of distributed power supply is the best place to access the distribution network.At last,using the wind power generation unit with the largest reactive power as the research object,and the reactive power compensation is optimized by genetic algorithm. |
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