Choose the sign convention
Define positive input power at the rectifier and positive export from the NPC inverter. The difference is converter loss plus any transient change in DC-link stored energy.
For reproducibility, note the software version, model assumptions and exact variable definitions before drawing a cross-model conclusion.
Check P, Q and displacement independently
Measure abc voltages/currents and compute real/reactive power over a stable set of fundamental cycles. Verify the commanded phase angle against the current fundamental, not only controller dq diagnostics.
For reproducibility, note the software version, model assumptions and exact variable definitions before drawing a cross-model conclusion.
Track the split DC link
A three-level NPC requires an accounting of both capacitor voltages and neutral-point balancing. Use the power mismatch to explain transient voltage excursions before treating them as instability.
For reproducibility, note the software version, model assumptions and exact variable definitions before drawing a cross-model conclusion.
Research comparisons
Compare source THD, tracked load P/Q, NPC exported power and neutral-point imbalance across setpoint steps and grid disturbances. Disclose filter, switching frequency, sampling and loss model.
For reproducibility, note the software version, model assumptions and exact variable definitions before drawing a cross-model conclusion.
Related project watch pages
Watch the relevant simulation output first, then use this article as a technical review or experimental planning guide.
Engineering research support
For the underlying MATLAB/Simulink, COMSOL, ANSYS HFSS or power electronics model, verification of solver settings, and documented outputs, contact the MATLAB Projects Code research team. Articles describe engineering validation approaches and are not a substitute for measured validation data.
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