We propose a dual decomposition based algorithm that solves the AC optimal power flow (ACOPF) problem in the radial distribution systems and microgrids in a collaborative and distributed manner. The proposed algorithm adopts the sec-ond-order cone program (SOCP) relaxed branch flow ACOPF model. In the proposed algorithm. bus-level agents collaboratively solve the global ACOPF problem ... https://www.lorenametaute.com/