Controlling an active distribution network (ADN) from a single PCC has been advantageous for improving the performance of coordinated Intermittent RESs (IRESs). Recent studies have proposed a constant PQ regulation approach at the PCC of ADNs using coordination of non-MPPT based DGs. However

due to the intermittent nature of DGs coupled with PCC through uni-directional broadcast communication

the PCC becomes vulnerable to transient issues. To address this challenge

this study first presents a detailed mathematical model of an ADN from the perspective of PCC regulation to realize rigidness of PCC against transients. Second

an

$H_{\infty}$

controller is formulated and employed to achieve optimal performance against disturbances

consequently

ensuring the least oscillations during transients at PCC. Third

an eigenvalue analysis is presented to analyze convergence speed limitations of the newly derived system model. Last

simulation results show the proposed method offers superior performance as compared to the state-of-the-art methods.