Dc microgrid structure with multiple energy storage groups

How can a dc microgrid be stable?

The strategy for stable operation of a DC microgrid must consider the coordination and cooperation of bus voltage, distributed generation (DG) output, and SOC of energy storage. These factors exhibit a nonlinear and intricate relationship with one another.

Are microgrids a reliable grid connection strategy for distributed energy resource (DER)?

Microgrids, which are characterized by flexible and controllable operation, are well suited as a reliable grid connection strategy for distributed energy resource (DER) [2, 3]. Microgrids have the capability to connect to the main grid or operate independently in island mode.

How does a microgrid work?

The microgrid utilises a two layer fuzzy control architecture. The first layer defines the system operation modes, while the second layer regulates the energy storage output to create a PV-battery control strategy that aligns with the current system operating conditions. The proposed two layer fuzzy control structure is shown in Figure 2.

What is the experimental platform for a dc microgrid system?

The platform utilizes the OPAL-RT OP5700 real-time digital simulator and the NI PXIe-1071 modular control platform, which emulate the circuit and control components of the DC microgrid system, respectively. The experimental platform is shown in Figure 14. The details of the experimental setup are provided in Table 4. HIL experimental platform.

How are multiple microgrids coordinated?

The coordination of multiple microgrids relies on the coordination of the system control. Despite the fact that the particular control schemes under different operation scenarios may vary, the architecture of the system control remains the same. The overall control configuration of the multiple microgrids is illustrated in Fig. 6.

Can multiple microgrids be interconnected via DC lines?

To overcome the inherent defects of the AC interconnected multiple microgrids, multiple microgrids can be interconnected via DC lines in a novel architecture based on the HUCC. This architecture preserves the AC connection to the host utility grid at the same time.