Improved Performance in the Control of DC-DC Three-Phase Power Electronic Converter Using Fractional-Order SMC and Synergetic Controllers and RL-TD3 Agent

In this article, starting from a benchmark represented by Direct Current-to-Direct Current (DC-DC) three-phase power electronic converter used as an interface and interconnection between the grid DC microgrid, we compare performances of series control structures—starting with classical proportional integrator (PI) type continuing more advanced ones, such sliding mode (SMC), integer-order synergetic, fractional-order (FO) controllers—in terms maintaining constant voltage microgrid. We present topology mathematical modeling using differential equations transfer functions DC-DC that provides The main task presented systems is to maintain supplied microgrid at imposed value, regardless total value current absorbed consumers connected elements fractional calculus were synthesize first set FO PI, tilt-integral-derivative (TID), lead-lag controllers Matlab R2021b Fractional-order Modeling Control (FOMCON) toolbox, these significantly improved system performance compared PI controllers. next proposed synthesized based on SMC, together its general flexible synergetic variant, both developed. structures are cascade combining SMC properties robustness over nonlinear for outer loop use properly tuned obtain faster response time inner loop. To achieve superior performance, also trained reinforcement learning-twin delayed deep deterministic policy gradient (RL-TD3) agent, which correction signals overlapping command Matlab/Simulink implementations RL-TD3 along results numerical simulations performed comparison structures.