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A. Generalized Multilevel TopologyE
A. Generalized Multilevel Topology
Existing multilevel converters such as diode-clamped and capacitor-clamped multilevel
converters can be derived from the generalized converter topology called P2topology proposed
by Peng [34] as illustrated in Figure 31.8. The generalized multilevel converter topology can
balance eachvoltage level by it self regard less of load characteristics, active or reactive power
conversion and without any assistance fromother circuits at any number of levels automatically.
Thus, the topology provides a complete multilevel topology that embraces the existing multilevel
converters in principle.
Figure 31.8 shows the P2multilevel converter structure per phase leg.Each switching
device, diode, or capacitor’s voltage is 1Vdc, for instance, 1/ (m-1)ofthe DC-link voltage. Any
converter with any number of levels, including the conventional bi-level converter can be
obtained using this generalized topology [1, 34].
B. Mixed-Level Hybrid Multilevel Converter
To reduce the number of separate DC sources for high-voltage, high-power applications
with multilevel converters, diode-clamped or capacitor-clamped converters couldbe used to
replace the full-bridge cell in a cascaded converter [35]. An example is shown in Figure 31.9.
The nine-level cascade converter incorporates a three-level diode-clamped converter as the cell.
The original cascaded H-bridge multilevel converterrequiresfour separate DC sources for one
phase leg and twelve for a three-phase converter. Ifa five-level converter replaces the full-bridge
cell, the voltage level is effectively doubled for each cell. Thus, toachieve the same nine voltage
levels for each phase,only two separate DC sources are needed for one phase leg and six for a
three-phase converter. The configuration has mixed-level hybrid multilevel units because it
embeds multilevel cells as the building block of the cascade converter. The advantage of the
topology is it needs less separate DC sources.The disadvantage for the topology is its control
will be complicated due to its hybrid structure
Existing multilevel converters such as diode-clamped and capacitor-clamped multilevel
converters can be derived from the generalized converter topology called P2topology proposed
by Peng [34] as illustrated in Figure 31.8. The generalized multilevel converter topology can
balance eachvoltage level by it self regard less of load characteristics, active or reactive power
conversion and without any assistance fromother circuits at any number of levels automatically.
Thus, the topology provides a complete multilevel topology that embraces the existing multilevel
converters in principle.
Figure 31.8 shows the P2multilevel converter structure per phase leg.Each switching
device, diode, or capacitor’s voltage is 1Vdc, for instance, 1/ (m-1)ofthe DC-link voltage. Any
converter with any number of levels, including the conventional bi-level converter can be
obtained using this generalized topology [1, 34].
B. Mixed-Level Hybrid Multilevel Converter
To reduce the number of separate DC sources for high-voltage, high-power applications
with multilevel converters, diode-clamped or capacitor-clamped converters couldbe used to
replace the full-bridge cell in a cascaded converter [35]. An example is shown in Figure 31.9.
The nine-level cascade converter incorporates a three-level diode-clamped converter as the cell.
The original cascaded H-bridge multilevel converterrequiresfour separate DC sources for one
phase leg and twelve for a three-phase converter. Ifa five-level converter replaces the full-bridge
cell, the voltage level is effectively doubled for each cell. Thus, toachieve the same nine voltage
levels for each phase,only two separate DC sources are needed for one phase leg and six for a
three-phase converter. The configuration has mixed-level hybrid multilevel units because it
embeds multilevel cells as the building block of the cascade converter. The advantage of the
topology is it needs less separate DC sources.The disadvantage for the topology is its control
will be complicated due to its hybrid structure
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A. Generalized Multilevel TopologyExisting multilevel converters such as diode-clamped and capacitor-clamped multilevelconverters can be derived from the generalized converter topology called P2topology proposed by Peng [34] as illustrated in Figure 31.8. The generalized multilevel converter topology canbalance eachvoltage level by it self regard less of load characteristics, active or reactive powerconversion and without any assistance fromother circuits at any number of levels automatically. Thus, the topology provides a complete multilevel topology that embraces the existing multilevel converters in principle. Figure 31.8 shows the P2multilevel converter structure per phase leg.Each switching device, diode, or capacitor’s voltage is 1Vdc, for instance, 1/ (m-1)ofthe DC-link voltage. Anyconverter with any number of levels, including the conventional bi-level converter can be obtained using this generalized topology [1, 34]. B. Mixed-Level Hybrid Multilevel ConverterTo reduce the number of separate DC sources for high-voltage, high-power applications with multilevel converters, diode-clamped or capacitor-clamped converters couldbe used to replace the full-bridge cell in a cascaded converter [35]. An example is shown in Figure 31.9.The nine-level cascade converter incorporates a three-level diode-clamped converter as the cell.The original cascaded H-bridge multilevel converterrequiresfour separate DC sources for one phase leg and twelve for a three-phase converter. Ifa five-level converter replaces the full-bridge cell, the voltage level is effectively doubled for each cell. Thus, toachieve the same nine voltage levels for each phase,only two separate DC sources are needed for one phase leg and six for a three-phase converter. The configuration has mixed-level hybrid multilevel units because it embeds multilevel cells as the building block of the cascade converter. The advantage of the topology is it needs less separate DC sources.The disadvantage for the topology is its control will be complicated due to its hybrid structure
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A. Generalized Multilevel Topology
Existing multilevel converters such as diode-clamped and capacitor-clamped multilevel
converters can be derived from the generalized converter topology called P2topology proposed
by Peng [34] as illustrated in Figure 31.8. The generalized multilevel converter topology can
balance eachvoltage level by it self regard less of load characteristics, active or reactive power
conversion and without any assistance fromother circuits at any number of levels automatically.
Thus, the topology provides a complete multilevel topology that embraces the existing multilevel
converters in principle.
Figure 31.8 shows the P2multilevel converter structure per phase leg.Each switching
device, diode, or capacitor’s voltage is 1Vdc, for instance, 1/ (m-1)ofthe DC-link voltage. Any
converter with any number of levels, including the conventional bi-level converter can be
obtained using this generalized topology [1, 34].
B. Mixed-Level Hybrid Multilevel Converter
To reduce the number of separate DC sources for high-voltage, high-power applications
with multilevel converters, diode-clamped or capacitor-clamped converters couldbe used to
replace the full-bridge cell in a cascaded converter [35]. An example is shown in Figure 31.9.
The nine-level cascade converter incorporates a three-level diode-clamped converter as the cell.
The original cascaded H-bridge multilevel converterrequiresfour separate DC sources for one
phase leg and twelve for a three-phase converter. Ifa five-level converter replaces the full-bridge
cell, the voltage level is effectively doubled for each cell. Thus, toachieve the same nine voltage
levels for each phase,only two separate DC sources are needed for one phase leg and six for a
three-phase converter. The configuration has mixed-level hybrid multilevel units because it
embeds multilevel cells as the building block of the cascade converter. The advantage of the
topology is it needs less separate DC sources.The disadvantage for the topology is its control
will be complicated due to its hybrid structure
Existing multilevel converters such as diode-clamped and capacitor-clamped multilevel
converters can be derived from the generalized converter topology called P2topology proposed
by Peng [34] as illustrated in Figure 31.8. The generalized multilevel converter topology can
balance eachvoltage level by it self regard less of load characteristics, active or reactive power
conversion and without any assistance fromother circuits at any number of levels automatically.
Thus, the topology provides a complete multilevel topology that embraces the existing multilevel
converters in principle.
Figure 31.8 shows the P2multilevel converter structure per phase leg.Each switching
device, diode, or capacitor’s voltage is 1Vdc, for instance, 1/ (m-1)ofthe DC-link voltage. Any
converter with any number of levels, including the conventional bi-level converter can be
obtained using this generalized topology [1, 34].
B. Mixed-Level Hybrid Multilevel Converter
To reduce the number of separate DC sources for high-voltage, high-power applications
with multilevel converters, diode-clamped or capacitor-clamped converters couldbe used to
replace the full-bridge cell in a cascaded converter [35]. An example is shown in Figure 31.9.
The nine-level cascade converter incorporates a three-level diode-clamped converter as the cell.
The original cascaded H-bridge multilevel converterrequiresfour separate DC sources for one
phase leg and twelve for a three-phase converter. Ifa five-level converter replaces the full-bridge
cell, the voltage level is effectively doubled for each cell. Thus, toachieve the same nine voltage
levels for each phase,only two separate DC sources are needed for one phase leg and six for a
three-phase converter. The configuration has mixed-level hybrid multilevel units because it
embeds multilevel cells as the building block of the cascade converter. The advantage of the
topology is it needs less separate DC sources.The disadvantage for the topology is its control
will be complicated due to its hybrid structure
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- Since a multi level converter is normall
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