Seminar Presentation 1
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Transcript of Seminar Presentation 1
SEMINAR ON IEEE PAPER MULTILEVEL CONVERTERS ---A NEW
BREED OF POWER CONVERTERS Jih-Sheng Lai, Senior Member, IEEE, and Fang Zheng
Peng, Member,
BY
A.V.RAVI TEJA 08EE6101
CONVERTERS (D.C. TO A.C. OR A.C. TO D.C.)
TWO TYPES:-
1.VOLTAGE SOURCE (VOLTAGE CONTROLLED)
2. CURRENT SOURCE(CURRENT CONTROLLED)
INVERTER OPERATION
CONVERTER OPERATION
TRANSFORMER MULTIPULSE VOLTAGE SOURCE 12 PULSE CONVERTER
TRANSFORMER COUPLED MULTIPULSE CONVERTERADVANTAGES DISADVANTAGESEASILY OBTAINABLE
NEAR SINUSOIDAL WAVEFORM
48 PULSE WAVEFORM ALSO OBTAINABLE
BULKYCOSTLYNOT PORTABLE
NEW BREED OF POWER CONVERTERS
DIODE-CLAMP MULTILEVEL CONVERTER
MULTILEVEL CONVERTER USING FLYING CAPACITORS
MULTILEVEL CONVERTER USING CASCADED-INVERTERS WITH SEPARATE D.C. SOURCES
DIODE-CLAMP MULTILEVEL CONVERTER
DIODE-CLAMP MULTIPULSE CONVERTERADVANTAGES DISADVANTAGESHIGH EFFICIENCYREACTIVE POWER FLOW
CAN BE CONTROLLEDCOMPACT AND PORTABLE
FOR MORE PULSES, MORE CLAMPING DIODES ARE REQUIRED
COSTLYUNEQUAL DEVICE
RATINGHIGH VOLTAGE
RATING FOR BLOCKING DIODES
MULTILEVEL CONVERTER USING FLYING CAPACITORS
MULTIPULSE CONVERTER USING FLYING CAPACITORSADVANTAGES DISADVANTAGESHIGH EFFICIENCYREAL AND REACTIVE
POWER FLOW CAN BE CONTROLLED
COMPACT AND PORTABLE
FOR MORE PULSES, MORE CAPACITORS ARE REQUIRED
COSTLY
MULTILEVEL CONVERTER USING CASCADED-INVERTERS WITH SEPARATE D.C. SOURCES
MULTIPULSE CONVERTER USING CASCADED-INVERTERS WITH SEPARATE D.C. SOURCESADVANTAGES DISADVANTAGESREQUIRES LEAST NUMBER
OF COMPONENTS TO ACHIEVE SAME VOLTAGE LEVELS
HIGH EFFICIENCYNO CLAMPING DIODES OR
VOLTAGE BALANCING CAPACITORS REQUIRED
COMPACT AND PORTABLESWITCHING LOSSES ARE
VERY LESS
NEEDS SEPARATE D.C. SOURCES FOR REAL POWER CONVERSIONS
APPLICATIONS 1
APPLICATIONS 2
CONCLUSIONS 1MULTI LEVEL INVERTERS HAVE THE MOST
IMPACT IN ADJUSTABLE SPEED DRIVEFOR STANDALONE SYSTEMS MAGNETIC
TRANSFORMER COUPLED CONVERTERS ARE THE BEST FOR HIGH EFFICIENCY.
FOR BEST PORTABILITY, MULTI LEVEL CONVERTER USING CASCADED INVERTERS WITH SEPARATE D.C. SOURCES IS THE BEST
CONCLUSIONS 2FOR CONTROLLING REAL AND REACTIVE
POWER, MULTILEVEL CONVERTERS USING FLYING CAPACITORS IS THE BEST
DIODE CLAMP MULTILEVEL CONVERTERS ARE THE BEST OPTION FOR BACK TO BACK INTERTIE SYSTEMS