Graphical Dynamic Model Software

User-Defined Dynamic Models

User-Defined Dynamic Models

The ETAP User-Defined Dynamic Models software can be used to build complex machine control diagrams via a graphical editor, customizable block libraries, and solvers for modeling and simulating dynamic systems.
A generator with exciter and turbine

Build control block diagrams needed to simulate the behavior of machines in Transient Stability and Generator Start-Up simulations. The User-Defined Dynamic Models provide independent self-testing via load rejection, load acceptance, and terminal bus faults for validation of models and their dynamic behavior.

Users are able to create dynamic models without the need to buy additional MATLAB Simulink® software. The software consists of Graphical Logic Editor (GLE) that can build control transfer function block diagrams. The User-Defined Dynamic Models software also includes a detailed compiler with comprehensive initialization routines that utilizes control block diagrams to simulate dynamic responses to power system disturbances through the Transient Stability software.

User-Defined Dynamic Models Key Features

  • Graphical Logical Editor
  • Drag and drop interface for building custom control block diagrams
  • Integrated with transient stability models
  • Wide variety of blocks for building models
  • Library of pre-defined UDM models to create complex models
  • Customize existing UDM models
  • Compile & test directly from the UDM builder
  • Dynamic Model Compiler
  • Real-Time compiling & linking of models
  • Control element toolbars including transfer blocks, input ports, output ports, etc.
  • Automatic UDM links to components
  • Create & edit models for Exciter, Governor, Power System Stabilizer & Lumped Load
  • Various model testing methods such as Load Acceptance, Load Rejection and Fault
Control system diagram displayed in ETAP

Custom Block Diagrams

  • Automatic Voltage Regulators (AVR)
  • Power System Stabilizers (PSS)
  • Generator Exciters
  • Turbines / Engines
  • Speed Governors / Controllers
  • Static and Dynamic Shunt Models
  • Wind Turbine Generator
  • Photovoltaic Array

User-Defined Dynamic Models Capabilities

  • Transient stability
  • Generator start-up
  • Motor acceleration
  • Synchronous motor startup
  • Frequency-dependent models
  • Bus voltage support mode


ETAP 16 User-Defined Dynamic Models (UDM)

ETAP 16 User-Defined Dynamic Models (UDM)

The User-Defined Dynamic Models (UDM) program is enhanced in the ETAP 16.0 release to allow for a more robust “element-level” and “plant-level” control system simulation. The UDM performance has been optimized for simulation of energy storage devices, wind turbine controls, PV system inverters, and generic machine models.


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