How can a passivity-based control strategy improve grid-forming multi-inverter power stations?

We propose a passivity-based control strategy to enhance the stability and dynamic performance of grid-forming multi-inverter power stations and address these challenges. The inner loop designed from the perspective of energy reshaping, ensures the stability of the inverter’s output.

Will inverters provide grid-forming services?

This multiyear perspective recognizes that the scale and scope of the types of power systems for which inverters will be called on to provide grid-forming services will and should begin modestly.

What is a grid forming inverter?

In contrast, grid-forming units are predominantly used for voltage regulation instead of current regulation, reactive power can vary for voltage support, and grid-forming inverters natively provide uninterrupted power during islanded conditions.25

Are grid-connected inverters stable?

Abstract: Existing grid-connected inverters encounter stability issues when facing nonlinear changes in the grid, and current solutions struggle to manage complex grid environments effectively.

Do grid-forming inverters stabilize voltage during transient events?

Typical grid-forming inverters do not provide high levels of fault current that typically stabilize voltage during transient events. As summarized in Figure 2, the timescales associated with machine voltage exciters and inverter control loops overlap.

Are inverter controls grid-following or grid-forming?

Specifically, this roadmap recognizes that inverter controls today are predominantly grid-following and that future power systems will involve a mix of inverter-based resources with both grid-following and grid-forming control capabilities.