Multi-level diode clamped DC/AC inverter
Higher voltage rating of inverter can be achieved by connecting the power semiconductor devices in series. Among these series connection of power semiconductor devices, multilevel is one of the topology. Multilevel diode clamped inverter consists of series connected capacitors that divide DC bus...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/17833 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Higher voltage rating of inverter can be achieved by connecting the power
semiconductor devices in series. Among these series connection of power
semiconductor devices, multilevel is one of the topology. Multilevel diode clamped
inverter consists of series connected capacitors that divide DC bus voltage into a set
of capacitor voltages, voltage across each capacitor is Vdc/(M-1), where Vdc is
voltage of DC source, M is the level of inverter. An M-level inverter needs (M-1)
capacitors.
Multilevel inverter is able to achieve high quality output voltage (i.e. less total
harmonic distortion, THD) by increase the number of level and select the appropriate
switching angle. The multilevel inverters operate at fundamental frequency and this
can reduce the switching loss as compare to pulse width modulation (PWM) inverter
The main objective of this project is to investigate the best firing angles for different
level of diode-clamped inverter and study the performance of multilevel diode
clamped inverter.
In overall, the proposed switching angle has been implemented and simulated by
using PSIM 8.0. This report gives a detailed investigation and description of a
multilevel inverter based on the fundamental switching frequency. |
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