Simplifications and refactoring in grid-converter control methods #138
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…sses. Deleting some extra features in grid converter control. Implementation of the frequency converter with diode bridge is partly reverted to the earlier version for its simpler usage.
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This pull request contains some minor changes and fixes:
Grid converter control methods and examples are simplified (both code and comments). Furthermore, some extra features are deleted, such as the possibility to choose the measurement point between the filter-capacitor and PCC voltages. Option to choose PSC method was also deleted, i.e., only RFPSC is directly available (but for advanced users PSC can be easily obtained by modifying a few lines of the code). The reason for these simplifications is to limit the complexity of the code and configurations. Additions can be considered later after the steady state is first found.
Some file and class names were changed. Naming conventions were unified.
Implementation of the frequency converter with a diode bridge is partly reverted to the earlier version for its simpler usage (i.e., compatibility with the basic Drive class). However, the DC capacitor is now (optionally) modeled in the VoltageSourceConverter (renamed, was Inverter earlier).
Discrete signals are now plotted using the staircase waveform in grid converter plots.
The selection of the overmodulation method in the PWM class is now done when the class is initiated (instead of passing this option as an argument when calling the PWM). The grid converter control methods use the minimum-phase-error (MPE) method by default.