中文说明：
对IEEE33节点系统进行配电网重构，利用基本粒子群迭代优化，采用前推回代计算潮流，有中文注释，是初学者必备的程序教程。
English Description：
For ieee33 bus distribution network reconfiguration, the use of basic particle swarm optimization iterative optimization, using forward and backward generation to calculate power flow, with Chinese notes, is a necessary program tutorial for beginners.