MATLAB: Bi directional buck boost converter with simulink and simscape only

Question

Hello All,

I did design a bi directional circuit in simscape.I used PWM from specialised power system for producing PWM of variable duty cycle.But i see the simulation runs very slowly.When i try increasing the sample time,the circuit functioanlity disappears. How can I increase the speed of my circuit.Kindly help

I'm using ode15s/dasesimscape solver under variable step configuration

Answer 1

Sample time is an intrinsic part of the power electronics circuit model. As a result, it would be difficult to speed up simulation by merely increasing the sample time.

There is an alternative way to achieve a faster simulation by using averaged-value models, which does not simulate the switching behavior. You can use the block in the following link to construct your model:

https://www.mathworks.com/help/physmod/sps/ref/averagevaluedcdcconverter.html

As mentioned in the link, you can program the block as a buck converter, boost converter, or buck-boost converter by providing the duty cycle. In your model, simply replace the individual component blocks with a single converter block.