Title of the presentation

More Intelligent Distribution Grids – the Basis
for a Successful Energy Transition
Bernd Schüpferling, Senior Key Expert Control Technology MV Switchgear
Unrestricted © Siemens AG Österreich 2014. All rights reserved.
siemens.at/future-of-energy
Renewable energy & smart grid
Change of the distribution grids
Today
Tomorrow
Unidirectional
power flow
Bidirectional
power flow
• Meshed system
throughout voltage
levels
Generation
at MV level
• Radial system
• Multifunctional
communication
• Simple protection
• No data acquisition
Generation
Regulated
• No intelligence
• Comprehensive
automation
at MV level
distribution
Generation /
transformer
Consumption
at LV level
e-car
infrastructure
Energy
storage
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2014-06-12
Schüpferling / IC LMV MS S PLM GIS SI
Infeed from distributed generating plants
poses new problems
• The share of renewable energy form distributed sources is increasing strongly
• Infeed into
- MV distribution grid via large PV plants, biogas plants, small wind farms
- LV distribution grid via numerous small PV plants
• Consequences:
- Modified load flow
- Strongly varying generation
- Voltage fluctuations
Voltage
limits
acc. to EN 50160
(+/-10%)
must be
adhered to
U
max
Overvoltage by
distributed generation
+10 %
230 V
U min
-10 %
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Voltage band contemplation in the LV distribution grid with classical power
generation
Voltage drop in the classical low-voltage grid
Highest voltage in the transformer substation
Lowest voltage at the house connection, at the end of the
low-voltage power distribution
MV
LV
Trf.
House conn.
Line
U
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Length
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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2014-06-12
Schüpferling / IC LMV MS S PLM GIS SI
Voltage band contemplation in the LV distribution grid
with distributed power generation
Voltage increase in the low-voltage grid with
distributed generation
Highest voltage at the generation center –
often at the end of the distribution
Adherence to the voltage band by reducing
the voltage level at the TS
MV
LV
Trf.
House conn.
Line
U
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Load
Photovoltaic
system
Length
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Schüpferling / IC LMV MS S PLM GIS SI
Voltage band contemplation in the LV distribution grid
with distributed power generation
Voltage drop during higher load consumption
Lowest voltage at the end of the
low-voltage power distribution
Adherence to the voltage band by increasing
the voltage level at the transformer substation
MV
LV
Trf.
House conn.
Line
U
Load
Length
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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FITformer® REG – V2 – sustainable success model
for integration of renewable energies
Power range up to 630 kVA,
max. operating voltage: 36 kV
Low-voltage load regulation range in three steps
Operating properties and dimensions
correspond to those of common distribution transformers
Execution example 21kV / 420V:
Load regulation range::
+/- 3.57% @ 400kVA
+/- 4.34% @ 630kVA
Additional setting range on the high-voltage side
for optimum operation:
+/- 2.5% and +/- 5%
(adjustable in de-energized condition)
Separate control and regulation unit
for easier access
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Distribution grid automation today
high
Degree of grid automation
low
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Intelligent transformer substations –
the key component in the active distribution grid
Transformer
At the interface between the mediumand the low-voltage distribution grid,
the "intelligent transformer substation"
is the key component, setting the
pace in the active distribution grid
All necessary signals /
measured values / information
are concentrated there,
enabling countermeasures to
the problems arising from the
increasing number of producers
of renewable energies
MV switchgear
8DJH (RRRT)
Low voltage
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Load-break switchgear 8DJH for transformer substations
with integrated intelligent components
Motor Control Unit,
electronic control for
switching devices in 8DJH
Low-power voltage transformer for
FCM acc. to IEC 60044-7,
3.25V/ 3 @ Ur max. 24kV
Monitor for supervision of the
distribution grid
SICAM FCM (Feeder Condition Monitor)
Smart Grid RTU SICAM CMIC
for automation of distribution grids
Low-power current transformer
for FCM acc. to IEC 60044-8,
225mV @ 300A
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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8DJH Compact –
maximum functionality on minimum space
Minimum space requirements
8DJH Compact
As against a comparable block-type or extendable
switchgear, it offers more space for additional
low-voltage feeders or smart-grid functionalities
It offers space for additional medium-voltage functions
(e.g. additional cable feeder)
Optimized transformer cable connection at the top
Lower costs due to short transformer cable
Lower efforts for laying the transformer cable
Adequate for packaged substations of all kind
Factory-assembled substations, with and without
control aisle
Locally erected substations, with and without control aisle
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Smart Grid RTU SICAM CMIC
for automation of distribution grids
Compact mechanical design:
128x124x123 mm (WxHxD)
Ambient air temperature:
-40 … +70°C
Maximum EMC:
5kV (IEC 60255-5), IEEE C37.90
4 interfaces:
RS232, RS485 und 2x Ethernet
8 binary outputs, 12 binary inputs
Display with 4 keys
Power supply
18 … 72 V DC
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Supervision of the distribution grid
SICAM FCM (Feeder Condition Monitor)
Directional short-circuit / earth-fault indicator
suitable for grids with all types of neutral treatment
Measurement of U / I / P / Q / S / cos / f
Ambient air temperature: -30°... +85° C
LC display for information and parameterizing
Inputs:
3 x I – phase current or
2 x I – phase current and 1 x I earth current (sensitive)
(225mV low signal according to IEC 60044-8 or 1A)
3 x U – phase voltage
(3.25V/ 3 low signal acc. to IEC 60044-7 or 100V/ 3)
Communication: Modbus RTU / RS485
Power supply: 24-60 V DC / 230 V AC
integrated buffer battery for ~ 20 years
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Low-power current transformer
for FCM acc. to IEC 60044-8
-
Output signal 225mV (at IP = 300A or 60A)
Accuracy class 0.5 (for phase current only), 1 or 3
Ring-core transformer with integrated precision shunt
Available in 4 versions:
as phase current transformer for installation around the bushing
as divided phase current transformer for installation around the cable
as divided zero-sequence current transformer for sensitive earth-fault current
as bushing-type current transformer with 2x phase current
and 1x sensitive earth-fault current
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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Low-power voltage transformer
for FCM acc. to IEC 60044-7
Output signal 3.25V / 3 (at Ur max. 24kV)
Accuracy class 0.5, 1 or 3
Resistive voltage divider
Voltage sensor for screened cable T-plugs
with symmetrical cone on both sides
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The intelligent transformer substation
Communication example for substation - RTU - control center
Distribution
management
system
SCALANCE M874
Mobile communication router
Wireless
(GSM / GPRS)
IEC 60870-5-104
SICAM CMIC
Compact micro-RTU,
specific design for
transformer substations
RS485 Modbus RTU
SICAM FCM
MCU
FITformer® REG
SICAM P85X
Feeder Condition Monitor with
MV sensors integrated in 8DJH
Motor Control Unit, electronic control
for switching devices in 8DJH
Transformer with LV load
regulation in three steps
Power meter and
power quality recorder
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References
Today's solution for intelligent transformer substations
RTU integrated in the 8DJH switchgear:
SICAM EMIC
Lead-gel battery
UPS with power supply unit and battery
M.c.b.s
Modem
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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References
Today's solution for intelligent transformer substations
RTU in separate RTU cubicle:
SICAM MIC
Wireless modem
UPS with power supply unit and battery
M.c.b.s
Local-remote switch
Unrestricted © Siemens AG Austria 2014. All rights reserved.
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References
Retrofit of transformer substations with air-insulated switchgear
4
3
5
2
1
Low-power voltage transformer for
FCM acc. to IEC 60044-7,
3.25V/ 3 @ Ur max. 24kV
Low-power current transformer
for FCM acc. to IEC 60044-8,
225mV @ 300A
RTU in separate RTU cubicle:
1 RTU - SICAM CMIC
2 Feeder Condition Monitor - SICAM FCM
3 Power Quality Recorder - SICAM P855
4 UPS with power supply unit and battery – SITOP USV
5 Free space for modem
Unrestricted © Siemens AG Österreich 2014. All rights reserved.
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Thank you very much for your attention!
Bernd Schüpferling
Senior Key Expert Control Technology
MV Switchgear
Infrastructure & Cities Sector
IC LMV MS S PLM GIS SI
Hofmannstraße 26
91052 Erlangen, Germany
Tel.: +49 9131 7-32439
Fax: +49 9131 7-31630
Mobile: +49 173 5133458
E-mail:
[email protected]
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