almotions
Newbie level 4
dq transformation
Hi,
recently,i'm doing some experiment to convert from 3 phase balanced input to dq components to calculate the active power.
i've also attached the simulation results:
As you can see,i've included the wattmeter to measure the active power drawn by the load(R=20 ohms) which shows 605Watts at steady state. But when i use the dq transformation and calculate the active power based on the formula P=VdId +VqIq
which is shown on the first graph,P=V23*V21+V24*V22 ,it gives a value of 400W at steady state.Is there anything wrong with my assumptions or diagram?
Another question. for dq transformation, why the direct and quadrature component remain at a constant value despite of change in theta with time (theta=wt)
Please help.Thanks lots
Hi,
recently,i'm doing some experiment to convert from 3 phase balanced input to dq components to calculate the active power.
i've also attached the simulation results:
As you can see,i've included the wattmeter to measure the active power drawn by the load(R=20 ohms) which shows 605Watts at steady state. But when i use the dq transformation and calculate the active power based on the formula P=VdId +VqIq
which is shown on the first graph,P=V23*V21+V24*V22 ,it gives a value of 400W at steady state.Is there anything wrong with my assumptions or diagram?
Another question. for dq transformation, why the direct and quadrature component remain at a constant value despite of change in theta with time (theta=wt)
Please help.Thanks lots