IVPower AFA collects and analyzes automatically transients records and substation automation events – allowing operators and experts to quickly focus on essential facts and make appropriate decisions. The areas of application are: -Quick assistance to control center for fault location and for decision taking after unsuccessful auto-reclosing, especially if several lines have been lost -Comprehensive support of post-mortem fault analysis by automatic data collection, analysis of sequence of events, pinpointing abnormal patterns -Contribution to conditional maintenance by: -providing operational statistics after each circuit breaker opening or closing -checking correct protection operation, eventually allowing to postpone planned protection testing

1. Lightning Strike Correlation
IVPower provides additional insight about the faults: for example, it
correlates faults with concurrent lightning strikes within the same area.
The automatic conclusion provided by IVPower helps operator decision
to reclose the line in case of unsuccessful automatic reclosing.
Fast, accurate and reliable
fault location
IVPower uses fault records in COMTRADE
format and provides reactance-based
fault location from one, two, or more
terminals of power lines or cables.
Our fault location algorithm supports:
-Unlimited number of COMTRADE
records
-Estimation of the tolerance
-Indication of closest tower and
geographical position
-Automatic selection of voltage channels
-Compensation of mutual coupling
-Consideration of shunt reactors and
parallel cable sections
As a result, most high-current short
circuits can be located with an accuracy
better than 5% of the line length.
Independent calculation based on
traveling-waves fault locators can be
integrated, if such devices are installed.
Automated Fault Analysis
Each fault location event is given a graphical representation of the fault on the line. This graphic displays the whole faulted
line, with a red rectangular region that represents the possible fault location, taking into account the computed tolerance.
Line feeders associated with recording devices are represented with flags. A tooltip indicates the station and the feeder labels:
Manual reclosing suggestion
To help the dispatcher in the situation where one
or several lines have been tripped (no autoreclosing
or unsuccessful autoreclosing) and when it is
important to decide quickly which line should be
manually reclosed first.
The practice/rules for manual reclosing vary from
one utility to the other depending on the
infrastructure, regulation and operational practice.
But we also offer some additional functions to
assist this decision taking:
-Indicate whether a lightning strike has (likely) hit
the line, by correlation with meteorological data.
-Detect secondary arc in case of single-pole
tripping, determine the time of secondary arc
extinction and provide reclosing suggestion to the
operator if it is reasonable to think that such an
attempt has a fair chance of being successful.
-Analyze the voltage-current pattern of the fault,
which in some cases reveals the possible fault cause
(burning vegetation...). A pattern corresponding to
a free burning arc in the air may characterize a
transient fault.

2. IVPower AFA in a nutshell
IVPower AFA collects and analyzes
automatically transients records and
substation automation events – allowing
operators and experts to quickly focus on
essential facts and make appropriate
decisions. The areas of application are:
-Quick assistance to control center for
fault location and for decision taking after
unsuccessful auto-reclosing, especially if
several lines have been lost
-Comprehensive support of post-mortem
fault analysis by automatic data
collection, analysis of sequence of events,
pinpointing abnormal patterns
-Contribution to conditional maintenance
by:
-providing operational statistics
after each circuit breaker opening or
closing
-checking correct protection
operation, eventually allowing to
postpone planned protection testing
Sequence of fault event
The sequence of events is presented in a
relative time scale the origin of which is
the time of the fault inception.
The initial representation of the
sequence of events only considers the
information related to analog time series
(voltages and currents). Some filters
enable to also display the binary
information (protection pick-ups and
trips, etc...).
Furthermore, it is also possible to extend
the area in order to see what happened
at the same time on other lines.
Real-time Monitoring with IVPower
- Manufacturer-independent solution
- Single user-friendly Web interface
- Automated Fault Analysis for enhanced productivity
- Delivers fast and reliable fault location
- Automatically recreates the sequence of an event
- Power Quality Monitoring
- Behavioral monitoring of protection relays and circuit breakers
- Substation Communication Monitoring
- Synchrophasor features for system-level stability analysis