AUTHOR=Li Peng , Mi Yang , Liu Nian , Zhou Yue , Yu Hao , Ji Haoran TITLE=Editorial: Flexible and Active Distribution Networks JOURNAL=Frontiers in Energy Research VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.687129 DOI=10.3389/fenrg.2021.687129 ISSN=2296-598X