Technical FAQs 4

How does a power inverter control reactive power generation?

A power inverter controls reactive power generation by adjusting the phase relationship between the output voltage and current. When the voltage leads the current, capacitive reactive power is generated, whereas if the current leads the voltage, inductive reactive power is produced.

How does an inverter absorb reactive power?

To absorb reactive power, it will generate a voltage still in phase with the grid voltage but with a lower amplitude. Inverters generate reactive power by use of the freewheeling diodes on each of the power switches. The inductive nature of the load makes it want to draw current even after the power switch has been turned OFF.

Why is reactive power important in a power inverter?

Although it doesn’t perform any useful work, reactive power is crucial for the proper functioning of AC systems. In a power inverter, reactive power is generated when the inverter's output voltage and current are out of phase, which is necessary to support the system's voltage levels and maintain stability.

Can an inverter produce both inductive and capacitive reactive power?

Yes, an inverter can generate both inductive and capacitive reactive power, depending on how its output is controlled. If the inverter's output voltage is ahead of the current, it produces capacitive reactive power. Conversely, if the current leads the voltage, inductive reactive power is produced.

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Inverter DC Reactance

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