How do I implement a DC current source in SimPowerSystems?

I would like to implement a DC current source in SimPowerSystems. The documentation of the AC Current Source block states the following:

A zero frequency specifies a DC current source.

However, when I insert an AC Current Source block and set the frequency to 0 Hz, the output current is always 0 A, regardless of what I enter as the peak amplitude.

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 2 (R14SP2). For previous releases, please read below for any possible workarounds:

You can implement a DC Current Source in SimPowerSystems in one of two ways:

1. Insert an AC Current Source block into your model

Set the Peak Amplitude parameter to the DC current and set the phase to either 90 degrees or -90 degrees, depending on the direction you want current to flow.

A reference to this can be found in the following link (AC Current Source-> Description)-

https://www.mathworks.com/help/sps/powersys/ref/accurrentsource.html

2. Insert a Controlled Current Source block into your model

Change the Source type parameter to DC and connect the input port with a Constant block that contains the value of the DC current.