Helloo to all
Have a question about 3 phase inverter control..
especially about voltage control, current control, and Active (P)+reactive (Q) Control
There are many articel about this control type, but can you guys give a simplier explanaiton?
i think if i want to control p and q, i have to control the Current -but to do this i have to change the PWM Signal, so i would also change the voltage right?
lets have 3 Types of operations:
1. Inverter in islanding mode ...lets say, smal village powered from 1 Inverter
Wich type of control does it need?
is it possible to control active and reactive power?
i think not,
because the load would get himself what he need dependig on his impedance.-
i think only voltag foward control is the right one , yes ?
Because the inverter should hold the Voltage contant , and the loads are going to get the current they need, right?
2. 1. Inverter in islanding mode ...lets say, smal village powered from 2 Inverter..
Wich type of control does it need?
P-Q control would be possible to divide the needed powerto the two inverters..
but this needs a current control..and to control the current , we have to control the voltage, right?
2. 1. Inverter in gried tie mode ...lets say 1 Inverter and 1 grid connected
in this case the inverter could be controlled as P-Q control right?
cause the inverter could inject P and Q as set in to the grid.
but to do this, we also have to control the current and to do this we have to control the voltage , right?
so the realy''only'' thing they change is primary the output voltage right?
or is it possible to change the inverter output current without changing the voltage?
Thankss
Have a question about 3 phase inverter control..
especially about voltage control, current control, and Active (P)+reactive (Q) Control
There are many articel about this control type, but can you guys give a simplier explanaiton?
i think if i want to control p and q, i have to control the Current -but to do this i have to change the PWM Signal, so i would also change the voltage right?
lets have 3 Types of operations:
1. Inverter in islanding mode ...lets say, smal village powered from 1 Inverter
Wich type of control does it need?
is it possible to control active and reactive power?
i think not,
because the load would get himself what he need dependig on his impedance.-
i think only voltag foward control is the right one , yes ?
Because the inverter should hold the Voltage contant , and the loads are going to get the current they need, right?
2. 1. Inverter in islanding mode ...lets say, smal village powered from 2 Inverter..
Wich type of control does it need?
P-Q control would be possible to divide the needed powerto the two inverters..
but this needs a current control..and to control the current , we have to control the voltage, right?
2. 1. Inverter in gried tie mode ...lets say 1 Inverter and 1 grid connected
in this case the inverter could be controlled as P-Q control right?
cause the inverter could inject P and Q as set in to the grid.
but to do this, we also have to control the current and to do this we have to control the voltage , right?
so the realy''only'' thing they change is primary the output voltage right?
or is it possible to change the inverter output current without changing the voltage?
Thankss