Uneven voltage,strong magnetic field and current effect can easily disturb the optimization of distribution network flexi-bility,The flexibility improvement effect is not obvious.In order to solve problems above,a two-stage flexibility optimization method was proposed for distribution network.Firstly,the instantaneous power balance algorithm was used to ensure the distribution network to reach the three-phase equilibrium.Secondly,the reactive power planning of the distribution network was realized through the output characteristics of reactive power output and active power loss,which effectively improved the operation quality and reduces the network loss.Finally,the two-stage optimization method that integrated diversified electric sources and loads was adopted to improve the flexi-bility of distribution network.In the first stage,a flexibility optimization model was built based on three indicators of flexibility and the supply characteristics of diversified electric sources and loads.In the second stage,in consideration of probability balance of distribu-tion network flexibility indicators,the model was solved by linear transformation algorithm to complete the flexibility optimization of dis-tribution network.Test results show that the proposed method has the advantages of small loss rate,small fluctuation curve of net load,short calculation time and flexible adaptability of distributed power access in distribution network.It can be seen that the flexibility of distribution network with distributed power supply can be effectively improved and the ability of distribution network to accept distribu-ted power supply can be improved through flexible optimal scheduling.
关键词
多元源荷/三相平衡/无功出力/有功损耗/灵活性/净负荷
Key words
diversified electric sources and loads/three-phase equilibrium/reactive power output/active power loss/flexibility/net load
维普
万方数据