Microgrid system experimental verification

How MATLAB/Simulink is used in dc microgrid testing?

In addition, a simulator for analyzing the behavior of the DC microgrid test platform is built in MATLAB/Simulink, and its accuracy is verified based on an energy flow analysis, revealing its potential for cyber-physical-system (CPS) construction.

Are battery-directly-connected DC microgrids feasible?

This study experimentally verifies the feasibility of the battery-directly-connected DC microgrid, and the process of autonomous, decentralized, and coordinated energy distribution between the distributed small batteries through power loading experiments.

How does a microgrid work?

This subsystem of the considered microgrid provides a bidirectional interface between the DC link and the energy storage system (ESS). It provides charging/discharging of the batteries depending on the selected power delivery or based on a predefined battery state of charge control.

What are the operational variables of a dc microgrid?

Figure 19, Figure 20 and Figure 21 show the main operational variables of the investigated DC microgrid, i.e., ESS current, DC bus voltage, and DC bus sourced current feeding the grid inverter, which is represented by AC grid voltage and the current.

How efficient is a dc microgrid?

The evaluation of the qualitative indicators of the DC microgrid concept, for example, efficiency, power factor, voltage, and current ripples, is listed in Table 2. It can be seen that, for this operational scenario, the system efficiency reaches 54%.

What happens if a microgrid voltage fluctuates?

When the power of the microgrid system changes, the voltage on the DC bus will fall or rise in order to maintain the power balance of the microgrid. When the DC bus voltage fluctuates, the energy storage system will be put into operation, absorbing or releasing power to make the bus voltage tends stable.