ETAP 12.5 adds a broad and robust set of new enhancements to the ETAP suite, as well as powerful new
analysis modules and time-saving capabilities. These include:
• Dynamic Parameter Estimation & Tuning - DPET
• GOST Short Circuit - R 52735 Standard
• Distributed electrical SCADA technology
• Thin-client consoles
• Web real-time consoles
• Native SCADA Communication Protocols
• IEC 61850 substation automation
• Phasor measurement unit archive and visualization
• Waveform capture and visualization
This New Features Guide describes important new capabilities in ETAP 12.5. These new features and
functions demonstrate our shared commitment to customers and business partners to provide the
most comprehensive solutions for the design and operation of critical power systems now, as well
as the energy technologies for tomorrow.
For nearly three decades, ETAP has been the leading modeling platform used to design, analyze,
and optimize electrical power systems in the most demanding industry applications. Similarly,
ETAP Real-Time™ – which has been providing online diagnostics, predictive simulation, optimization,
and management of power systems for more than 20 years – has been deployed in a multitude of
customer installations to ensure their reliable and energy-efficient operation.
GOST Short Circuit
R 52735 Standard, Russian Federation and CIS Countries
ETAP 12.5 supports a new method of short circuit calculation in compliance with GOST R 52735 Standards.
Built-in intelligence allows the short circuit program to automatically apply all GOST factors and ratios
required for high voltage short circuit calculations. By automating the process with multiple calculation and
results analysis tools, ETAP 12.5 removes the guesswork from short circuit studies, and saves users hundreds
of hours of tedious hand calculations.
New capabilities include:
• Calculate periodic and aperiodic components, as well as surge current
• Calculation of short circuit current at any specified time
• Radial and multi-loop circuit calculations
• Consider pre-fault loading condition
• Short circuit output report in Russian language
Multi-Knowledge of a rotating machine and its associated control system dynamic parameters is essential to
power system transient stability simulation studies. These parameters include machine impedances and
time constants, inertial and damping coefficients, prime mover and governor parameters, excitation system
and AVR parameters, Power System Stabilizer (PSS) parameters, load characteristics, etc.
DPET is especially useful for Power Plant Model Validation, as mandated by North American Reliability
Council (NERC) MOD-026 and MOD-027 Standards. MOD-026 will require power plant owners to verify
that dynamic models of excitation controls are accurate and up-to-date; MOD-027 places the same
requirements on dynamic models of governors and turbine controls.
DPET features and benefits include:
• Generate comparisons of multiple estimation results
• Utilize ETAP User-Defined Dynamic Model to build custom models
• Combinations of Models: Generators, Governors, Exciters, PSS, etc.
• Utilize field data from disturbance recorders and PMUs
• Tune dynamic models with multiple inputs and outputs
• Estimate model parameters using field measurements
• Compliance with NERC MOD Standards
• Automatically exclude questionable data and noise
• Multi-objective stochastic optimization method
Accuracy in hundreds of these parameters directly affect the
credibility of the simulation results.
In order to Verify and Validate (V&V) simulation studies, it is common to compare simulation results against
field test measurements such as generator load acceptance and rejection test. However, expertise is required
to understand the effect of each parameter, as the simulation model is manually tuned to provide similar
response as the one observed in the field tests or recordings. The task of adjusting each variable via the
trial-and-error approach is a tedious and time-consuming one.
DPET adds an intelligent automated layer of time saving capabilities. Combined with ETAP User-Defined
Dynamic Models (UDM), DPET automatically adjusts appropriate parameters so simulation responses
match actual field measurements accurately in a matter of minutes, rather than weeks.
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