Inverter power and power generation capacity

What is PV module capacity and solar inverter capacity ratio?

The PV module capacity and solar inverter capacity ratio are commonly referred to as capacity ratio. Reasonable capacity ratio design needs to be considered comprehensively in the light of the specific project.

Why do inverters need a larger capacity?

This would require a larger capacity than usual, as some reactive power flow needs to be accommodated to limit the voltage rise. Excess capacity can be utilized to implement smart inverter functionalities and inject more energy under conditions where conventional inverters would cap their generation.

What is an inverter based generator?

RES that are connected to the power grid using power electronic inverters are called inverter-based generators (IBGs). Inverters transform the output voltage from RES into the appropriate AC network voltage and frequency. The control structure of the IBGs is hierarchical.

How to provide voltage support in PV inverter?

To provide voltage support at the PCC, reactive power is injected into the grid under fault conditions as per the specified grid codes. As previously discussed, the simultaneous injection of peak active power from PVs and reactive power into the grid for voltage support can trigger the over current protection mechanism in PV inverter.

What is a power electronic inverter?

Power electronic inverters that interface with RESs and the grid are designed to improve quality of power and help the system to remain stable through the disruptions or grid faults of short durations, especially when the grid is unbalanced.

How is inverter capacity exploited?

In this case, the inverter capacity is exploited by partially injecting both active and reactive power under fault conditions. Since the generated active power is not high, the remaining inverter capacity is utilized by injecting reactive power as in (30).