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8/3/2019 4.1 Transfomer-Less vs Transformer-Based UPS 080224
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Newave SA, Switzerland [email protected] - www.newaveups.com28/02/2006 ML3-49 1
Newave TransformerlessNewave Transformerless
Double Conversion TopologyDouble Conversion Topologyvversusersus
DoubleDouble Conversion TopologyConversion Topology
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 2
TRADITIONAL TOPOLOGY
8/3/2019 4.1 Transfomer-Less vs Transformer-Based UPS 080224
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 3
Large physical size
Physically heavy:120kVA (6pulse) from 700 to 1200 kg
120kVA (12pulse) from 1200 to 1800 kg
Large footprint120kVA (6pulse) from 0.64 to 1.1 m2
120kVA (12pulse) from 1.30 to 2.2 m2
More space required to extract
additional hot air due to
additional losses
Size and weight increases withthe addition of input filters
ca.1000 mm
120 kVA (6pulse)
V = 1.44 m3
Footprint = 0.80 m2 800
mm
1800mm
800mm
ca.2000 mm
120 kVA (with 12pulse)
1800mm
V = 2.88 m3
Footprint = 1.6 m2
DOUBLE CONVERSION TOPOLOGYTHE FACTS: TRANSFORMER BASED
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 4
Double Conversion with output transformer Internal battery up to a maximum of 30 kVA only
Only a fixed number of batteries allowed
Batteries subjected to high ripple during charging
DOUBLE CONVERSION TOPOLOGY
THE FACTS: TRANSFORMER BASED
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 5
High input current distortion (> 30%)
Addition of input filters or 12 pulse rectifiers is expensive,
space consuming and decreases efficiency further to < 90%
Low input power factor; 0.6 to 0.86 depending on load
DOUBLE CONVERSION TOPOLOGY
THE FACTS: TRANSFORMER BASED
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 7
Low Efficiency (< 92%) Output distortion with non-linear loads is inherently poor
and must be corrected electronically
Neutral is directly connected to the load without
protection
DOUBLE CONVERSION TOPOLOGY
THE FACTS: TRANSFORMER BASED
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 8
Input Power On
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 9
DC Filter Pre-charging
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
8/3/2019 4.1 Transfomer-Less vs Transformer-Based UPS 080224
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 10
Booster in Operation
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 11
Battery Charging
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 12
Inverter Operation
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 13
Normal Operation
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 14
Battery Operation
DOUBLE CONVERSION TOPOLOGY
THE FACTS : TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 16
Conceptpower DPA , THDi < 2 %Conceptpower DPA , THDi < 2 %
Small physical size
Light weight:120 kW (150 kVA) = 407 kg
Small footprint
120kW (150 kVA) = 0.58 m2
DOUBLE CONVERSION TOPOLOGY
FEATURES: TRANSFORMER-LESS
730 mm
120 kW
V = 1.15 m3
Footprint = 0.58 m2
1975
mm
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 17
Double Conversion, transformerless technology
Variation in number of blocks (40-50) allowed in order to
adjust autonomy times
Separate battery chargers provide improved rippleless
charging
DOUBLE CONVERSION TOPOLOGY
FEATURES: TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 18
High input power factor (0.99), independent of the load applied
Fast diode input rectifier with input filter and PFC control does notcreate incompatibility problems with input supplies
Input emergency alternators do not need to be oversized
1997/06/0310:54:36
5ms/div
(5ms/div)
NORM:200kS/s
CH1=50V
DC 100:1
CH2=100V
DC 100:1
DT 5.55ms
=Filter=Smoothing:ONBW:FULL
=Offset=C H 1 : 0 . 0 VC H2 : 0 VC H 3 : 0 . 0 VC H 4 : 0 . 0 V
=RecordLength=Main:10KZoom:1K
=Trigger=Mode:AUTOType:EDGE LINEDelay: 0.0nsHoldOff: MINIMUM
Low input current distortion (< 2 % with 400V input voltage)
- no additional input filtering required
DOUBLE CONVERSION TOPOLOGY
FEATURES: TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 19
High efficiency (> 95%) due to transformerless technology and ESIS
1997/06/0310:54:36
5ms/div
(5ms/div)
NORM:200kS/s
CH1=50V
DC 100:1
CH2=100V
DC 100:1
DT 5.55ms
=Filter=Smoothing:ONBW:FULL
=Offset=C H 1 : 0 . 0 VC H2 : 0 VC H 3 : 0 . 0 VC H 4 : 0 . 0 V
=RecordLength=Main:10KZoom:1K
=Trigger=Mode:AUTOType:EDGE LINEDelay:0.0nsHoldOff: MINIMUM
Reduced switching stress on power components higher reliability
ESIS (Energy Saving Inverter Switching) also reduces EMI effects
High efficiency means longer autonomy times as well
as cost savings
DOUBLE CONVERSION TOPOLOGY
FEATURES: TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 20
Very low output impedance (< 1%) excellent dynamicperformance and no corrections needed for unbalanced loads
Low harmonic distortion at the output (< 2% with non-linear loads)
Output neutral is decoupled from the mains neutral during
disturbances
1997/06/0310:54:36
5ms/div
(5ms/div)
NORM:200kS/s
CH1=50V
DC 100:1
CH2=100V
DC 100:1
DT 5.55ms
=Filter=Smoothing:ONBW:FULL
=Offset=C H 1 : 0 . 0 VC H2 : 0 VC H 3 : 0 . 0 VC H 4 : 0 . 0 V
=RecordLength=Main:10KZoom:1K
=Trigger=Mode:AUTOType:EDGE LINEDelay:0.0nsHoldOff: MINIMUM
DOUBLE CONVERSION TOPOLOGY
FEATURES: TRANSFORMER-LESS
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 21
Efficiency < 92% - additional
cooling may be necessary
Large physical size
Heavy: 120 kVA: 700-1200 kg
Large footprint 1.1 m2 +additional cabinet for 12-pulse +
battery cabinet needed
Number of battery cells is fixed
Batteries subjected to highripple voltage during charging.
Low input power factor (0.6-0.8).
Input current distortion > 30%
- additional input filter required.
Efficiency > 95% - no or little
additional cooling necessary.
Small physical size.
Light weight: 120 kVA = 407 kg.
Small footprint 0.58 m2 noadditional cabinet for 12pulse or
battery cabinet needed.
Variation of number of battery
blocks allowed.
Separate battery charger ensurescorrect rippleless charging.
High input power factor (0.99).
Input current distortion < 2%
- no additional input filters.
Traditional Topology Newave Transformerless Topology
UPS TOPOLOGY COPMARISONOVERVIEW
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 22
Slow switching controlled rect-
ifier may cause incompatibility
with other equipment.
Emergency generator must beoversized.
High output impedance (typ.
8%) - poor dynamic response and
additional corrective circuits
required for unbalanced loads
Higher inherent Output distortion
with non-linear loads
Switching elements switch on at
full load current; increased stress
Fast switching diode rectifier
does not create incompatibility
problems with input supply
No need to oversize emergencygenerator
Low output impedance (< 1%)
- excellent dynamic response
and excellent performance with
unbalanced loads
Low output distortion on all
types of loads
Increased reliability due to
reduced switching stress
Traditional Topology Newave Transformerless Topology
UPS TOPOLOGY COPMARISONOVERVIEW
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Newave SA [email protected] - www.newaveups.com28/02/2006 ML3-49 23