AMSC's Distribution Static Var Compensator (D-SVC) system provides precise reactive compensation to eliminate voltage sags and flicker from large electric loads. It monitors voltage, load, and currents 4000 times per second to instantly mitigate abnormalities. The D-SVC is designed for substations and comes pre-assembled for easy installation. It addresses issues like voltage flicker from varying loads and sags from large motor starts while improving power factor and voltage regulation.

1. Distribution Static Var Compensator (D-SVC™) System
15kV Class, Dynamic Power Quality Solution
Applications
Voltage flicker reduction from dynamically
varying AC Loads
Single point solution to address voltage
sags due to large motor starts
Steady state voltage regulation and fast
power factor correction
Features
Direct connect @15kV – No transformer
required
Delivered ready for installation
minimal impact to existing operations
Time to implementation is far less
than the traditional options
Integral harmonic filtering
Easy to maintain
No special permitting required
Modular design - can be expanded and
adjusted for future load variations
Standard utility grade equipment
The Challenge
Power quality and the challenges to supply
consistent, clean and steady energy for
dynamically varying loads or high demand
start-ups to end customers has been
something utilities have been dealing with for
years.
Voltage flicker and voltage sags are some of
the most common problems associated with
large induction machines and dynamically
varying loads. Voltage disturbances are not
just isolated to the facilities that cause them,
but also impact other customers on the same
circuit, miles away from the source of the
problem.
Product Description
AMSC’s Unique thyristor based Distribution
Static Var Compensator (D-SVC™) system
provides precise reactive compensation,
eliminating voltage sag and flicker from large
electric loads and adverse impact on your
machinery, as well as neighboring customers.
Our real time power quality monitoring of the
phase voltage, load, and line currents allows
instantaneous response to abnormalities.
AMSC’s proven dynamic power control
technology collects measurements at a speed
4000 times a second, instantly mitigating
voltage sags and flicker.
The AMSC D-SVC system is designed for
outdoor substations and comes fully factory
assembled, tested, and ready for
interconnection.

2. Distribution Static Var Compensator (D-SVC™) System
15kV Class, Dynamic Power Quality Solution
Power Quality Applications
* First rating shown is per branch. Ratings in
parenthesis is maximum rating of a 4-branch
D-SVC System
Specifications
Connection
Voltage
5-15kV Direct Connect (higher
voltage would require
transformer)
Frequency 50 or 60Hz
Response Time 1 cycle
Controls
Applications
3- Phase load compensation,
power factor control, voltage
regulation, flicker mitigation,
and motor starting
System
Monitoring
Digital recording of system
conditions, D-SVC system
action,
multiple outputs, alarms and
warning signals, accepts
multiple inputs,
Ambient
Temperature
-40°C to +50°C (de-rating or
additional radiators may be
required for 50°C application)
Standards IEC 61954, 60060, 60071,
60270
IEEE 1031-2011, 1303-2011
Packaging Substation Pad mount
(Standard),
H-Pole platform mount,
Metal Enclosed
Nature of PQ
Problem/Result
Culprit Typical
Applications/
Markets
Transient /
Voltage Sags
Large Motor
Starts
Oil and Gas,
Chemical and
Petrochemical,
Water/
Wastewater,
Mining
Semi
Continuous
(50% duty)/
Flicker
Large, varying
AC loads
Welding
operations, metal
recycling and
crushers, saw
mills, foundries
Continuous/
voltage
regulation,
power factor
Inductive
loads,
distributed
generation
Distribution solar
and wind, large
commercial and
industrial
operations on
utility distribution
networks
Voltage Continuous Semi-
Continuous
Transient
13.8kV
(wye)
3.5MVAR
(14.0)*
5.2MVAR
(20.8)
11.5MVAR
(46.0)
12.47kV
(wye)
3.0MVAR
(12.0)
5.0MVAR
(20.0)
10.5MVAR
(42.0)
11kV
(wye)
2.7MVAR
(10.8)
4.0MVAR
(16.0)
9.0MVAR
(36.0)
6.9kV
(delta)
2.9MVAR
(11.6)
4.8MVAR
(19.2)
10.0 MVAR
(40)
4.16kV
(delta)
1.7MVAR
(6.8)
2.8MVAR
(11.2)
6.0MVAR
(24.0)
Product Ratings

3. Distribution Static Var Compensator (D-SVC™) System
15kV Class, Dynamic Power Quality Solution
Application Examples Protect Expensive Assets – VFD’s
used for speed control
VFD’s are serial devices that can be
unreliable
VFD downtime can result in
inoperable motor and loss of
significant revenue
D-SVC systems are shunt connected
at the distribution system and can
provide the reactive power needed
to keep operations running despite
loss or failure of drive system
Distribution Grid
M1 M2 M3 M4
VFD VFD VFD VFD
D-SVC
Switchgear
M1 M2 M3 M4
VFD
Distribution Grid
D-SVC
VFD’s used primarily for motor
starting
A multiple motor operation can result
in a really expensive variable
frequency drive system
A single D-SVC system can be placed
at the entrance of the operation and
mitigate voltage sags from any motor
in the plant. No need for single
motor solutions.
D-SVC systems can be 30-50% of the
costs of a VFD/switchgear lineup

4. Distribution Static Var Compensator (D-SVC™) System
15kV Class, Dynamic Power Quality Solution
Example Single Line Diagram
Sample General Arrangement
Optional remote
monitoring available
All commissioning and
controls adjustments can
be done with touchscreen
HMI
System comes complete
with sensing PT’s and CT’s
for flexible performance
Isolation switch included
for system protection
Minimal site preparation
and start-up support
required
No special building, water,
air or fan cooling required
Compact installation for
minimal footprint
Environmentally benign
Robust operation during
low voltage conditions