The current limiting function of photovoltaic inverters in the Panama power grid

Why do inverters need a current limiter?

Without proper safeguards, excessive currents during disturbances can damage the inverter’s power stage, leading to system failures and jeopardizing grid stability. Addressing this challenge is where current limiters come into play. Current limiters are the first line of defense during grid disturbances.

What is the current limiting strategy of GFM inverters?

The current limiting strategy of the GFM inverters has been studied in related literature. In , it is proposed that when the current exceeds the standard, the control strategy should be switched to the grid following (GFL) control for current limiting if the current exceeds the standard. Ref.

How does a PV inverter work?

One method used for this purpose is limiting the export power: The inverter dynamically adjusts the PV power production in order to ensure that export power to the grid does not exceed a preconfigured limit. To enable this functionality, an energy meter that measures export or consumption must be installed at the site.

How to protect GFM inverters and support the power grid?

To protect the GFM inverters and support the power grid under faults or severe disturbances, various current-limiting control methods are developed. In this paper, an overview of these methods is presented, which can be classified as direct, indirect, and hybrid ones.

Which grid tie inverter has a limiter?

The Y&H GTN-1200W Grid Tie Inverter is one of the best grid tie inverters with a limiter. It is designed to efficiently supply power precisely in line with your load requirements, preventing any excess electricity from being sent back to the grid.

Do SolarEdge inverters support advanced grid limitations?

To improve grid stability, many electric utilities are introducing advanced grid limitations, requiring control of the active and reactive power of the inverter by various mechanisms. SolarEdge inverters with CPU version 2.337 and later support these requirements (some features may require later versions; refer to the relevant feature for details).