I*SIM - Transient Stability
PTW I*SIM is a program for
transient stability analysis. It is designed to simulate system
response during and after transient disturbances such as faults, load
changes, switching, motor starting, loss of utility, loss of
generation, loss of excitation, and blocked governor events. I*SIM is
designed to study today’s most challenging simulation problems in one
convenient and easy-to-use program.
- 1. Simulate complicated disturbances and system
responses to design safer and more reliable power systems.
- 2. Save time with all IEEE standard exciter,
turbine governor and PSS models built-in.
- 3. Increase flexibility with a powerful
graphical builder for user-defined controllers.
- 4. Save time by running multiple case scenarios
from a single action.
- 5. Communicate designs more easily with
professional reports and graphs.
- 6. Evaluate alternatives quickly and easily to
establish an optimal design.
- Graphical interface for system design, model
selection and study results.
- Stores multiple study scenarios with dynamic
events and outputs graphics for each project.
- Expanding tree structure to manage study
- Copy, paste and rename study scenarios to
compare alternative designs.
- Run multiple study scenarios as a single action.
- Compare results from multiple scenarios on the
- Plot phase and sequence voltage and current,
speed, frequency, real and reactive power, rotor angle, voltage angle,
torque, Efd, Ifd, Ed”, Ed’, Eq”, Eq’, and more.
Custom Models in User-Defined
- Choose from over 100 standard models for
machines, governors, exciters, power system stabilizers, loads,
overcurrent relays, under voltage, under frequency relays, and distance
- Graphical drag and drop interface for building
custom control block diagrams.
- Dynamic response to power system disturbances.
- Flux-level representation of all machines
including induction motors.
- Full dynamic representation of independent
power systems (no infinite bus required).
- Simulate fault conditions and fault clearing
for 3-phase, single line, double line bus faults and branch faults
anywhere along the line.
- Start, trip and reclose on induction motors.
- Integrated motor parameter estimation for
- Frequency dependent network modeling with
positive, negative, and zero sequence networks.
- Control event sequence with adjustable relay
- Simulate load shedding, isolation from utility,
transfer switching, loss of excitation, blocked governor, block load
changes, motor starting, and fault conditions.