A Hybrid Master–Slave Control Strategy for Multiple Distributed Generators in Microgrid

Abstract

The problem of insufficient regulation ability in isolated microgrid operations in traditional master–slave control is targeted in this research. A hybrid master–slave control strategy is proposed to operate multiple distributed generators (DGs) in a microgrid with alleviated regulation characteristics. Firstly, a virtual synchronous generator control is adopted in the master DG to provide voltage and frequency support for the system; however, the lack of participation of the slave DG control in traditional PQ droop control in the system regulation makes a master DG susceptible to any load variation. The problem is resolved by proposing an improved droop control strategy, which ensures that the slave DG has similar output droop characteristics as the master DG and thus can respond to system load disturbances alongside the master DG. Secondly, virtual coordinate transformation and virtual impedance control are introduced to realize the decoupling and precise distribution of output power of multiple DGs. Finally, a simulation and experimental platform for a multi-DGs parallel system are established to verify the effectiveness of the proposed strategy.

Cyber Granular-Enabled Intelligent Sensing for High Performance Flocking Control in Continuous Flat Pressing System

“…The distributed synergistic model of cyber granular computing (several distributed synergistic approaches)consists of a single terminal power actuator unit and viscoelastic model as a single grain structure unit, the hydraulic power system is considered as a power mechanism with elastic load, and the single cylinder power actuator unit grain structure can be represented by the structure shown in Figure 1. [Chen Yanxia(2023)]. A detection mechanism, a controller, and a slab viscoelastic model [Xiong Qiang(2022)].…”