f0338802 Ecotap VPD en
f0338802 Ecotap VPD en
f0338802 Ecotap VPD en
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ON-LOAD TAP-CHANGERS WITH
VACUUM TECHNOLOGY – NOW
ALSO AVAILABLE FOR DISTRIBUTION
TRANSFORMERS.
Compact, reliable, and maintenance free: With the superior vacuum technology
for on-load tap-changers from Maschinenfabrik Reinhausen (MR), distribution
transformers can now be regulated. They maintain a constant voltage in public,
industrial, and private distribution grids by compensating for fluctuations in
the medium and, if necessary, high-voltage levels and responding dynamically
to changes in the feed-in and demand at the low-voltage level.
Multi-talented: voltage regulation The benefits resulting from the dynamic adjustment
distribution transformers of voltage in the distribution grid and therefore in
medium and low voltage are being increasingly seen
I stabilize grids with limited short-circuit power in grid planning and operation. As is already the case
I allow renewable energy to be integrated into in higher voltage levels, here the vacuum on-load
grids without expensive grid reinforcement tap-changer is also the product of choice for adding
I increase the operating efficiency of electricity grids voltage regulation during operation to the previously
I stabilize industrial processes static transformers in the distribution grid.
I help to reduce energy costs in the operating
environment
I simplify the cost-effective connection of wind
farms and solar parks in compliance with the
grid code
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ECOTAP ® VPD ®
ECOTAP® VPD®
ON-LOAD TAP-CHANGER.
Sometimes big things can be surprisingly compact.
ECOTAP® VPD® combines the know-how that MR has I The compact dimensions permit installation in
accumulated over the decades in vacuum on-load tap- virtually any power rating class of distribution
changers of the high-speed resistor-type technology transformers without any major changes to the
with the experience in voltage regulation distribution footprint
transformers gained around the globe since 2012 I The proven electro-mechanical operating principle
through working with transformer manufacturers and of MR's vacuum technology ensures stable and
operators. ECOTAP® VPD® allows all manufacturers of reliable operation for decades without the need
distribution transformers to add voltage regulation to service the primary equipment
transformers to their product range: With superior MR I Use of the high-speed resistor-type tap-changer
vacuum technology and at a price which makes the principle, with which manufacturers and opera-
transformer/on-load tap-changer system very attractive tors have been familiar for decades, ensures that
to a lot of operators. design, production, testing, and operation can
be carried out on the basis of previous experience
and that comprehensive training is not needed
Switching unit
I Vacuum interrupter prevent the transformer oil from being contaminated and ensure that the primary equipment
does not need service
I A step voltage of up to 825 V, highest voltage for equipment of up to 40.5 kV, and switchable currents of up to 30 A / 100 A
enable a wide range of use in transformers of up to 8 MVA (depending on the transformer's high voltage)
I The high-speed resistor-type tap-changer principle with regulation on the high-voltage side prevents noticeable contributions
to transformer losses and ensures compliance with the EU Ecodesign Directive
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Direct drive
I A maximum of 20 tap-change operations per
minute enable quick responses to changing grid
situations
I Comprehensive safety functions and an electrical
energy accumulator ensure that once tap-change
operations are started they are reliably completed
even if all power is lost
I Can be used outdoors thanks to IP54 degree of
protection
Selector moduls
I The robust mechanics permit 500,000 tap-change operations without maintenance
(more than the usual life of a corresponding distribution transformer)
I 9 or 17 operating positions ensure a large regulation range together with fine tap-change steps
I Since it can be used in selected synthetic and natural esters, operation in applications with
stringent environmental compatibility and thermal demand requirements is also ensured
*) The anticipated start of delivery for the variant with 17 OLTC operating positions is the end of 2018
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ECOTAP ® VPD ®
User friendly
I Auto mode with single-phase voltage regulation algorithm
I Manual mode with raise-lower operation
I Complete parameterization on the controller possible,
no laptop needed
I Comprehensive indication of status in the display
Reliable regulation algorithm based on the busbar voltage measured in one phase
V
Upper blocking threshold
Tap-change operation
Regulation bandwidth
Desired voltage value
Tap-change
operation
High-speed step-up threshold
Time
Delay time Delay time High-speed switching
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OPTIMIZED FOR MANUFACTURERS
OF DISTRIBUTION TRANSFORMERS
AND OPERATORS.
Process optimized. Plug & play.
ECOTAP® VPD® fits seamlessly into the ECOTAP® VPD® makes handling voltage
transformer manufacturer's processes - regulation distribution transformers just as
from design and assembly to testing. simple as conventional ones for operators.
I The well-known high-speed resistor-type tap- I Available for transformers from all manufacturers
changer principle allows the existing transformer I The outstanding economic viability makes use in
design to be adapted with ease and at little cost many applications possible
I Rapid delivery times due to small number of I The compact footprint allows existing transformers
product variants (7 resistor variants across the to be replaced with ease on-site
entire performance range) I The compact design of the controller allows it to
I The tap winding can be integrated both electrically be installed in one fuse panel
and mechanically at any point in the transformer's I Maximum longevity thanks to proven MR vacuum
winding technology
I Moderate amount of assembly work due to small I Maintenance-free for the entire life of the distribu-
number of parts and minimized wiring tion transformer
I Suitable for all drying processes I Satisfies the EU Ecodesign Directive because the
I Suitable for all test fields (no additional inductive transformer's loss class is not affected
currents) I The large regulating range with fine steps provides
I Support from MR's global service network a large application range without the risk of flicker
I Also suitable for alternative insulation fluids
I Convenient plug-based connection at the installa-
tion site
I The global MR network is available for training and
servicing
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ECOTAP ® VPD ®
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MORE POWER,
MORE VALUE.
Superior technology. Compelling economics.
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
OPERATING PUBLIC DISTRIBUTION
GRIDS WITH STABLE VOLTAGES.
As well as a reliable supply of electricity, the customers of public distribution
grid operators expect to be provided with a relatively constant voltage within
a narrow bandwidth regulated by standards.
grid operators
ECOTAP® VPD® ECOTAP® VPD® ECOTAP® VPD® ECOTAP® VPD®
Voltage regulation transformers or line regulators
with ECOTAP® VPD® give distribution grid operators di-
0.4 kV 0.4 kV
rect access to tried and tested equipment, which they
can use at a central point to stabilize the voltage for
several low-voltage feeders regardless of the voltage
in the upstream grid. Compared with capacitor banks,
voltage regulation transformers or line regulators last Thanks to proven MR vacuum technology, the
much longer and permit finer regulation. relia-bility of the ECOTAP® VPD® is unique. In its per-
formance class, it is also the only on-load tap-changer
Whether a voltage regulation transformer or line requiring no maintenance. Due to their extremely
regulator with ECOTAP® VPD® is the optimum solution compact design, transformers with ECOTAP® VPD®
depends on various factors including the size of the can be used anywhere – also in pole installations, for
grid area to be stabilized. example. The high economic viability of the complete
transformer / ECOTAP® VPD® system makes this com-
pact tap-changer in many cases the most efficient
solution for stabilizing the voltage of a distribution
grid.
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
ECONOMICALLY INTEGRATING
RENEWABLE ENERGY AND NEW
FORMS OF DEMAND INTO GRIDS.
Distribution grid operators face a difficult balancing act: On the one hand, they
need to ensure a stable supply voltage in the medium and low-voltage grid and on
the other hand, they need to integrate a growing amount of renewable energy (in-
crease in voltage) and in the future also new types of demand (decrease in voltage).
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
Disconnection point
Primary substation
Secondary substation
with conventional
distribution transformer
Secondary substation
with voltage regulation
distribution transformer
Scope of application
I Where there is a risk of the voltage band being infringed at
the medium voltage by huge fluctuations in feed-in (e.g. wind
turbines) or high irregular industrial demand
I Where there is a risk of the voltage band being infringed
at the low voltage by volatile feed-in (e.g. large roof-mounted
systems) or new kinds of consumers (e.g. E-mobility, heat
pumps)
Advantages
I Greater potential for feed-in and demand to be integrated
throughout the low-voltage grid
I Avoidance or postponement of grid reinforcement measures
in the low-voltage grid (running cables in parallel, locating
new secondary substations, etc.)
I Increased planning certainty for all feeders of the secondary
substation affected due to more potential for integration
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Disconnection point Disconnection point
Secondary substation
possibly with voltage
regulation distribution
transformer, depending
on situation
Feeder-based use of voltage regulation distribution Use of voltage regulation distribution transformers
transformers with a focus on the medium-voltage in all parts of the grid with a focus on the
grid medium-voltage grid
Scope of application
I Secondary substations at or beyond a certain distance from Where there is a risk of voltage bands being infringed in
the primary substation are equipped with voltage regulation a larger interconnected area at the medium voltage as a
distribution transformers result of excessive voltages from the high voltage or feed-in
I The voltage of the underlying low-voltage grids is decoupled connected directly to the primary substation, which cannot
from the voltage of the affected medium-voltage line or ring be compensated for by the on-load tap-changer on the
and kept within the requirements of EN 50160 by the voltage HV/MV transformer.
regulation distribution transformers
I As a result, higher voltage fluctuations in the affected Advantages
medium-voltage grid are possible
I Greater potential for feed-in and demand to be integrated
Scope of application into the high- and medium-voltage grid and the underlying
low-voltage grids
Where there is a risk of voltage bands being infringed in a larger I Avoidance or postponement of large-scale grid reinforce-
interconnected area at the medium-voltage level, e.g. at the end ment measures in the medium-voltage grid or construction
of feeders, due to large fluctuating or constant feed-in and/or of another primary substation
consumers in the vicinity of the stations in question I Avoidance or postponement of replacement of a HV/MV
transformer with a transformer with a different trans-
Advantages mission ratio or a transformer with a tap changer
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
SOURCE: AVACON AG
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ECOTAP ® VPD ® FOR PUBLIC DISTRIBUTION GRIDS
OPTIMIZING GRID TOPOLOGIES.
An efficient distribution grid has as little equipment as possible.
This enables savings of both investment as well as operating expenses.
Voltage regulation distribution transformers with ECOTAP® VPD® help
to improve the efficiency of grid sections. Using them can reduce
the total number of secondary substations.
This allows the grid operator to combine two second- In order to optimize grid topologies, the maximum
ary substation or spares it from having to build a new regulating range of on-load tap-changers is of major
secondary substation. If a supply job can be handled importance because it determines the supply radius.
by one secondary substation alone, savings can be Compact dimensions and zero maintenance further
made in rent payments, station maintenance, and boost the economic viability of the optimization
investments in replacement or new parts. The only measure.
requirement is that the one transformer is configured
such that its performance is sufficient for the load
and/or feed-in of the enlarged grid area.
Example of how to optimize the grid topology using voltage regulation distribution transformers
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ECOTAP ® VPD ® FOR INDUSTRIAL APPLICATIONS
STABILIZING INDUSTRIAL
PROCESSES IN VOLATILE GRIDS.
For industrial processes to run stably and reliably, they require
a stable voltage supply within a narrowly defined band.
Medium voltage
Reactive
power Diesel Transformer
compensation generator with ECOTAP® VPD®
G
0.4 kV
(factory)
M M M
Low-voltage Low-voltage building
plants installation
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REDUCING ENERGY COSTS
BY OPTIMIZING VOLTAGE.
Energy consumption for loads such as conventional, i.e. non-frequency-
controlled motors, heaters or lighting is affected by factors such as the
voltage with which the equipment is supplied.
If such equipment is supplied with a higher voltage Optimizing energy consumption requires on-load
than needed, e.g. because the medium voltage is higher tap-changers with a large regulating range which
than nominal voltage, the equipment consumes more can also be switched in small individual steps. This
energy than needed. ensures that the actual voltage is always as close
as possible to the optimum voltage from an energy
Transformer
with ECOTAP® VPD®
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ECOTAP ® VPD ® FOR DISPERSED GENERATION UNITS
ECONOMICALLY COMPLYING
WITH GRID CODES.
For integration into the grid, dispersed generation plants based on
renewable energies (photovoltaics, wind, biogas) must meet the
respective requirements of the grid operator in the form of grid codes.
Grid codes frequently oblige the manufacturers of Voltage regulation transformers improve
dispersed generation plants to demonstrate the elec- reactive power capability
trical properties of the systems and require type tests.
The provision of reactive power, which depends on By decoupling the secondary voltage from the grid
grid voltage, is particularly critical. Particularly when voltage at the generator, voltage regulation trans-
underexcited, the ability of the generation plants to formers with ECOTAP® VPD® ensure that the genera-
provide reactive power is limited in the event of un- tion plant is always supplied with its nominal voltage
dervoltage. In cases where the requirements placed and use can thereby be made of full reactive power
on providing reactive power are particularly deman- capability. Depending on configuration, full reactive
ding, making the required reactive power available power capability is available, for example, in a range
can often only be accomplished either by oversizing of between +20 percent and -20 percent of nominal
the inverters or by requiring the generation plant to voltage.
operate such that it reduces the amount of active
power fed into the grid to suit the situation. Neither
approach is particularly attractive; the former be-
cause it increases the system costs of the generation An example of the reactive power provision
plant and the latter because it reduces the plant‘s in relation to the line voltage
capacity. Both lower the operator‘s return.
U[p.u.]
1.25
1.20
With voltage regulation
Overvoltage
1.15
distribution transformer
1.10
0.95
Undervoltage
0.90
0.85
0.80
0.75
0.70
-0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 Q/Pmax
Consumption Generation [p.u.]
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The voltage decoupling made possible by the voltage
regulation transformer means there is no need to Voltage regulation transformers in photovoltaic parks
oversize the inverters or reduce the amount of active
power fed to the grid, which ultimately makes the
generation plant more cost-effective. Alternatively, ~
the headroom obtained by using the voltage regu-
lation distribution transformer can also be used to
operate an existing generation plant with a higher
Unit regulation Transformer regulation
power rating.
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ECOTAP ® VPD ®
ECOTAP® VPD®.
Technical drawing of the 36 kV variant
133.8
392.5
258.7
800
365
205 178
143.7
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TECHNICAL DATA.
Motor-drive unit
Runtime per tap-change operation approx. 300 ms
Shortest gap between tap-change operations 3s
Permissible ambient temperature during operation -25 °C ... +70 °C
Protection class IP54
Installation site Indoors, outdoors
Control unit
Permitted voltage range 100...240 VAC, 50/60 Hz
Note: Measured voltage is supply voltage
Power consumption Max. 345 VA
Internal fuse (F1) Micro-fuse, 6,3x32 mm, min. 250 V, T4A
Continuous operation: -25 °C...+50 °C
Permissible ambient temperature during operation
Brieflly (maximum of 2 h per day): -25 °C...+70 °C
Protection class IP30
Installation site Indoors, also suited to outdoor use in separate housing
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Maschinenfabrik Reinhausen GmbH
Falkensteinstrasse 8
93059 Regensburg, Germany
Phone: +49 941 4090-0
Fax: +49 941 4090-7001
E-mail: info@reinhausen.com
www.reinhausen.com
Please note:
The data in our publications may differ from
the data of the devices delivered. We reserve
the right to make changes without notice.