Optimized Sliding Mode Frequency Controller for Power Systems Integrated Energy Storage System With Droop Control Authors ANH-TUAN TRAN, VAN VAN HUYNH, JAE WOONG SHIM AND CHEE PENG LIM Publication year 2025 Index (WoS/Scopus) WoS Publisher IEEE Journal IEEE Access Link https://ieeexplore.ieee.org/document/10915636