AUTHOR=Yan Jiong , Lu Shengwei , Wang Sicong , Wu Aohua , Sang Zixia , Huang Jiaqi , Liu Junyao TITLE=A Multi-Level Investment Allocation Indicator System for Distribution Network Planning JOURNAL=Frontiers in Energy Research VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.889325 DOI=10.3389/fenrg.2022.889325 ISSN=2296-598X