TY - RPRT TI - Hierarchical Optimal Power Flow with Improved Gradient Evaluation AU - Liang, Heng AU - Zhou, Xinyang AU - Zhao, Changhong PY - 2022 DO - 10.23919/acc53348.2022.9867623 UR - https://www.osti.gov/biblio/1898010 ID - 1898010 ER -