MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase...
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Transcript of MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase...
![Page 1: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/1.jpg)
MULTILEVEL INVERTERS
By Vaishnavi
![Page 2: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/2.jpg)
NEED FOR MULTILEVEL INVERTER
High Power application
Staircase waveform
Input Current
Switching Frequency
Renewable Energy sources
Only disadvantage – More Switches, Cost
![Page 3: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/3.jpg)
BASIC CONCEPT
Use of Power SemiconductorSwitches in series - with several lower voltage dc sources - staircase voltage waveform
Lower voltage dc sources – Capacitors, Batteries, PV cells
![Page 4: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/4.jpg)
TYPES OF MULTILEVEL INVERTERS
Diode Clamped Multilevel Inverter
Flying Capacitor Multilevel Inverter
Cascade Multilevel Inverter
![Page 5: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/5.jpg)
DIODE CLAMPED MULTILEVEL INVERTER
Let, m number of nodes or levelsThen, We require,
(m-1) Capacitors2(m-1) Switching Devices
Example :-m= 6
Therefore, Capacitors – 5 Switching Devices - 10
![Page 6: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/6.jpg)
CIRCUIT DIAGRAM OF 6- LEVEL INVERTER
![Page 7: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/7.jpg)
SWITCHING STATES
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LINE VOLTAGE WAVEFORM OF SIX LEVEL CONVERTER
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FEATURES OF DIODE CLAMPED INVERTER
High Voltage rating for blocking diodes
Unequal Switch device Rating
Capacitor Voltage Unbalance
![Page 10: MULTILEVEL INVERTERS By Vaishnavi. NEED FOR MULTILEVEL INVERTER High Power application Staircase waveform Input Current Switching Frequency Renewable.](https://reader036.fdocuments.us/reader036/viewer/2022082817/56649e365503460f94b261de/html5/thumbnails/10.jpg)
Advantage & Disadvantage
ADVANTAGES
Harmonic Content is less-filters avoidedEfficiency – HighControl method - simple
DISADVANTAGES
Difficult to control the real power of individual converterNeed for more clamping diodes
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Thank You