To improve the power quality of the converter output voltage, either the number of levels in the output needs to be increased or additional filters needs to be added. The existing multilevel converter such as cascaded H bridge converter can provides higher levels in the output volage, but requires more isolated dc supplied. The proposed invention modifies the three-level active neutral point clamped converter by adding an extra switch and capacitor to increase the output voltage levels form three to five.
The proposed invention consists of seven active switches and a floating capacitor. Compared to the conventional active neutral point clamped converter with six switches can provides three levels in the output voltage. However, the proposed invention consisting of a floating capacitor in which the voltage is maintained equal to half of the dc link. This allows the converter to generate five levels in the output voltage. Hence the overall THD is improved and the need for the external filter is reduced which results in high power dense solutions.
- With the additional of one switch and a capacitor, the proposed invention can provide five levels in the output voltage.
- Compared to the conventional H-bridge, the proposed invention requires lesser devices.
- The proposed invention achieves lower volume and hence high power dense.
- With the additional of one switch and a capacitor, the proposed invention can provide five levels in the output voltage.
- Compared to the conventional H-bridge, the proposed invention requires lesser devices.
- The proposed invention achieves lower volume and hence high power dense.
Tested and validated
Tested and validated.
3
Reduction in overall cost of the system, lower losses.
Power electronic manufacturing industries, solar and wind industries, transmission and distribution industries.
It can be used in medium voltage converters. Application such as solar wind, motor drives, distribution and transmission systems.
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