导出了自行查找关联线元的方法，并侧重研究了点对缓和曲线反算问题的算法。
The process of finding the relative point is studied, with an emphasis on the algorithm of inverse point to transition curve .
通过对两个算例的分析可看到改进算法的效果以及粒子群算法解决分布式电源并网情况下反时限过流保护整定问题的能力。
The improved PSO algorithm is tested in two models, to show the effects of improvement and its ability in solving the inverse time overcurrent relay coordination problem when DG units are connected.
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