*Article* **Coordinated Control and Dynamic Optimal Dispatch of Islanded Microgrid System Based on GWO**

### **Yuting Wang \*, Chunhua Li and Kang Yang**

Electronic and Information College, Jiangsu University of Science and Technology, Zhenjiang 212003, China; viven\_lch@just.edu.cn (C.L.); 192030035@stu.just.edu.cn (K.Y.)

**\*** Correspondence: 182030049@stu.just.edu.cn

Received: 26 July 2020; Accepted: 14 August 2020; Published: 17 August 2020

**Abstract:** As an effective carrier of renewable distributed power sources, such as wind power and photovoltaics, microgrids have attracted increasing attention as the energy crisis becomes more serious. This paper focuses on the symmetry between the dynamic optimal dispatch and the coordinated control of islanded microgrid to determine the optimal system configuration that can reliably meet energy needs. In order to solve energy managemen<sup>t</sup> problems, operating costs and environmental benefits, a novel methodology that combines dynamic optimal dispatch and Grey Wolf Optimizer (GWO) is developed in this study to obtain the best output of different system components. This is to minimize the total cost of microgrid power generation and reduce pollutant emissions. In addition, a comparison is carried out between GWO and Particle Swarm Optimization (PSO). Moreover, the comparison between system configurations in six different scenarios and the effectiveness of GWO in solving optimization problems are presented. Finally, the simulation results show that GWO is more effective than PSO in determining the optimization parameters and the utilization rate of renewable energy in different scenarios is up to 92.96%. The simulations and experimental results verify the successful performance of the research method proposed in this study.

**Keywords:** dynamic optimal dispatch; wind turbine; photovoltaic; Grey Wolf Optimizer (GWO); energy managemen<sup>t</sup>
