Siemens Transformers
FITformer REG 2.0
The adaptable Distribution Transformer
Restricted © Siemens AG 2015 All rights reserved.
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Regulated Distribution Transformer FITformer REG
Product Application
How to keep the power quality by integrating small power generation plants
in the LV grid?
Initial Situation:
In the grid the complexity of energy flow increases due to rising implementation of small power
generation plants.
Future Requirements:
Buildup an efficient and up to date grid infrastructure. Integrate end consumers with their power
generation, their load in the system and their storage capabilities.
Operative Problems:
LV grid extension caused by the obligation to connect small solar and bio mass power generation.
Fluctuating energy flow – returned feeding into MV/HV-grid. Voltage fluctuation in the grid.
The challenge
is posed by
the maximum
voltage
difference at a
node between
the operating
states heavy
load and light
load with
maximum
distributed
power feed in
In this case, the
distribution
transformer
FITformer®
REG increases
or decreases
the voltage at
the incoming
node and
therefore
reduces the
voltage
difference Δu
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
The regulated Distribution Transformer FITformer REG
 Range of ratings up to 630 kVA;
 Highest voltage for equipment: 36 kV
 Low-voltage load regulation range in three steps
 Operational characteristics and dimensions
correspond to those of common distribution
transformers
 Additional setting range on the high-voltage side
for optimum operation
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
The principle of regulation in the low-voltage system
A control unit clocks the switching of the vacuum contactors:
I.
a bypass is activated by closing the bypass contactor
II.
faultless switch-over of the vacuum contactors with no unwanted peaks
III.
bypass is turned off and the transformer is in the target position
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
Current development stage of FITformer REG – version 2.0
• Separate control and main transformer cubicle for easier
accessibility and maintenance
• Control unit includes only electromechanical elements
(Improvement of security and maintenance)
• New cast resin bushing assembly (improved sealing and
reduced assembly process)
• Air break contactor for the bypass
• Optimized layout of components
• New Control unit with higher isolation level, as well as
integrated IEC 60870-5-104/101, IEC 61850 and Modbus
RTU communication
• Physical Auto/Manual/Remote selector switch, position
indication lamps and raise/lower voltage buttons on the
control cubicle front panel
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
Components of FITformer REG 2.0
1. Cast resin bushing assembly
2. Vacuum contactor
3. Resistors
4. Bypass contactor
5. Overload relay
6. Fuses
7. Coupling relay
8. Interface terminal blocks
9. Switch for test and normal operation
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
Control cubicle – inner view
Not visible when cubicle
door opened
(due to covering plate)
visible when cubicle door
opened(Abdeckungsplatte)
1 Fuses (voltage metering
7 Indicator lamps for active
tapping
2 SIMEAS P55 power meter
8 Status indication lamp
3 SICAM CMIC controller
9 Switches for higher /lower
regulation
4 Power supply
10 Auto/manual/ remote
operation selector switch
5 Fault indication relay
6 RS 232/RS 485 converter
11 Customer and regulation unit
interface terminal blocks
12 Webserver and customer
communication ports
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Product Overview
Control possibilities
I.
consumption/generation
on low voltage level
bidirectional
energy flow
generation MV level
Standard: voltage controlled in two
stages based on measurements in the
substation (Parameter for slow and fast
switching-over as well as delay times)
II. Remote: Voltage regulation and –
monitoring with serial or TCP/IP based
communication
III. Manual: manual voltage regulation via
respective buttons on the control cubicle
IV. Optional: additional ammeter (more
accurate assessment of the network
state in terms of the power fed in and the
load)
smart meter
energy storage
e-car infrastructure
regulated
distribution transformer
What will happen in case of supply interruption?
 Automatic start-up (wired program control to nominal position)
V. Optional: controlling based on
decentralized measurements in the lowvoltage system (SICAM – product
portfolio including a master control unit)
VI. Alternative: external signals
 all parameters are stored on a micro-memory card (MMC)
(no data loss, no backup battery with maintenance work is needed)
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Experiences
[V]
240.0
[kW]
600.0
STUFE []
4
480.0
360.0
235.0
3
240.0
120.0
230.0
0.0
2
-120.0
-240.0
225.0
1
-360.0
-480.0
00:00:00
16.03.2012
[V]
240.0
06:00:00
16.03.2012
12:00:00
16.03.2012
18:00:00
16.03.2012
[kW]
600.0
00:00:00
17.03.2012
STUFE []
4
480.0
360.0
235.0
3
240.0
120.0
230.0
0.0
2
-120.0
-240.0
225.0
1
-360.0
630 kVA
21kV
± 4 % off load tapping range
420 V
± 4.3 % voltage regulation under load
short circuit losses 5400W
no load losses 600W
Dyn5
-480.0
00:00:00
22.03.2012
06:00:00
22.03.2012
12:00:00
22.03.2012
18:00:00
22.03.2012
00:00:00
23.03.2012
Restricted © Siemens AG 2015 All rights reserved.
Regulated Distribution Transformer FITformer REG
Your sustainable success model for integrating renewable energies
• Ensures voltage quality and guarantees feed-in of decentralized
generated energy in the grid
• Cost saving alternative to grid extension
• Additional setting range on the medium voltage side for optimum
operation
• No additional losses
• Compact design
• Low number of switching cycles due to broad load-regulated tapping
range (thus eliminates the need for security measures to avoid
regulation loops) Interlocks ensure the avoidance of wrong
switching
• No moving components in the active part of the transformer
• Many years of experience with reliable contactor and control
technology from Siemens
Thank you for your attention!
Questions?
• Current measurement
• Remote parameterization possible
• Extendable by serial communication protocols
Restricted © Siemens AG 2015 All rights reserved.
Restricted © Siemens AG 2013 All rights reserved.