Microgrid virtual impedance simulation

How virtual impedance is realised in low-voltage microgrid?

The virtual impedance is realised by subtracting the virtual voltage drop from VPSs voltage to offer the inductive decoupling environment in low-voltage microgrid, meanwhile, virtual impedance cooperating with VPSs control can guarantee accurate reactive power sharing no matter whether the DGs voltage deviation exists.

Do virtual impedance methods-based control solutions perform well in droop-operated microgrids?

Scientific Reports 14, Article number: 13356 (2024) Cite this article Under the presence of nonlinear load, the most existing virtual impedance (VI) methods-based control solution performs poorly in reactive power sharing among droop-operated VSIs in microgrids (MGs).

How does Adaptive virtual impedance affect microgrid performance?

Properly implementing adaptive virtual impedance can contribute to the operational stability and power sharing performance of the microgrid during disturbances . However, if poorly designed or implemented, virtual impedance may deteriorate the dynamics of the overall system and even leads to instability.

How to calculate virtual impedance based microgrid in syrf?

The general systematic diagram of the virtual impedance and GPS timing based microgrid is shown in Figure 2. The virtual impedance control law equation (12) can be represented in SYRF as V o d ∗ V o q ∗ = V r 0 − R v − X v X v R v I o d I o q . (26) where I f d q ∗ and I f d q are the reference and measured value of the filter inductor current.

Can virtual impedance improve power control performance during transient and grid faults?

A robust virtual impedance implementation method is also presented, which can alleviate voltage distortion problems caused by harmonic loads compared to the effects of physical impedances. Furthermore, an adaptive impedance concept is proposed to further improve power control performances during the transient and grid faults.

Can VPS and virtual impedance be used in microgrids?

This paper also confirms that the realisation of VPS and virtual impedance is viable. This work is supported by the National Natural Science Foundation of China under projects nos. 61573300 and 61533010. Droop control is a common method in the universal microgrid applications.