A Frequency–Pressure Cooperative Control Strategy of Multi-Microgrid with an Electric–Gas System Based on MADDPG

With the development of micro gas turbines (MT) and power-to-gas (P2G) technology, electric–gas system plays an important role in maintaining stable, economical, flexible operation microgrid. When subjected to power load disturbance natural disturbance, controller needs coordinately control frequency microgrid pressure at pipeline nodes. Additionally, reliability stability a multi-microgrid are much higher than that single microgrid, but its technology is more complicated. Thus, frequency–pressure cooperative strategy oriented proposed this paper. Firstly, based on analysis operating characteristics network coupling equipment, dynamic model transmission built. Secondly, including MT, P2G electric vehicles (EVs), distributed sources loads has been established. In addition, according three objectives frequency, node coordination stability, structure Muti-Agent Deep Deterministic Policy Gradient (MADDPG) designed, then definition space reward functions completed. Finally, different cases set up multi-microgrid, simulation results compared with PI fuzzy control. The show that, MADDPG can greatly suppress deviation caused by wind disturbances air fluctuations fluctuations. it coordinate well overall between sub-microgrids multi-microgrid.