I understand that there are two ways solar inverters can regulate power, one is called Volt / Var and the other one Frequency / Watt.
But my electricity knowledge has limits so I have the following questions for each.
Volt / Var.
My understanding is that this is used in reaction to Grid Voltage rise, and when that happen, based on a predefined curve, the inverter will start raising the reactive power component of the AC output.
If the inverter is raising the AC output Reactive Power component to modulate the Real Power output, does that mean that it has no effect on the DC input power. The DC production will be untouched, just the AC out component will be manipulated.
Frequency / Watt
I am less clear on what happens in that scenario. I understand, the Grid can change the frequency to force an inverter to reduce its output.
Is the frequency change used as a signal, that in turn makes the inverter throttle the DC output, or is the power reduction done differently.
I apologize if any of these are stupid question J
But my electricity knowledge has limits so I have the following questions for each.
Volt / Var.
My understanding is that this is used in reaction to Grid Voltage rise, and when that happen, based on a predefined curve, the inverter will start raising the reactive power component of the AC output.
If the inverter is raising the AC output Reactive Power component to modulate the Real Power output, does that mean that it has no effect on the DC input power. The DC production will be untouched, just the AC out component will be manipulated.
Frequency / Watt
I am less clear on what happens in that scenario. I understand, the Grid can change the frequency to force an inverter to reduce its output.
Is the frequency change used as a signal, that in turn makes the inverter throttle the DC output, or is the power reduction done differently.
I apologize if any of these are stupid question J
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