I have created a three-phase cascaded h-bridge inverter at Simulink with the SHE-PWM technique, and I want to test it in the DVR applications. How can I design a controller for that in the DVR application?
The problem is that SHE-PWM is usually a low frequency modulation technique. It can be used in high frequency but it won't be as effective. For DVR applications high frequency modulations and conventional three level inverters are used. Therefore, u have two options;
(1) use a hybrid SHEPWM technique that is effective in high-frequency. The following papers can be useful;
https://ieeexplore.ieee.org/document/8772121
https://ieeexplore.ieee.org/document/4523783
(2) You have to use higher level inverter instead of conventional three level inverters so that u can remove high number of low order harmonics and improve the overall harmonic profile. But bear in mind it can make the system a little bit complicated.
Thank You, dear Sheikh Tanzim
Actually, the mentioned Inverter is able to produce 9 levels in its output, and also, by the SHE-PWM method we can eliminate harmonics up to 23 in single-phase mode. As a result, the complexity of that has solved.
The main problem is how to run it in the DVR applications, which requires to have a close loop.
To implement a closed loop SHEPWM u need to derive an objective function from the DVR. So far in literature I have found two methods:
(1) using model predictive control.
(2) walsh transformation.
The following paper may help:
https://link.springer.com/chapter/10.1007/978-3-642-23753-9_84
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