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Análisis de estabilidad transitoria

El perfil de tensión inicial de cualquier red equilibrada o desequilibrada se computa con algoritmos de flujo de energía equilibrada, como Newton Raphson o Rápida separación. Se realizará la simulación en el módulo de análisis de estabilidad transitoria de CYME de Eaton de la red trifásica equilibrada equivalente.

El módulo de análisis de estabilidad transitoria de CYME de Eaton permite simular los transitorios electromecánicos en sistemas de energía eléctrica. Posee una amplia biblioteca de equipos y modelos de control; la capacidad de incluir controles definidos por el usuario, una interfaz de usuario flexible y excelentes gráficos.

El módulo utiliza la técnica de la solución de integración trapezoidal implícita simultánea para las ecuaciones de redes, máquinas y controladores. El programa admite la capacidad de probar la respuesta del paso de los controladores y el modelado definido por el usuario del equipo del sistema y los controladores.

ANÁLISIS DE ESTABILIDAD TRANSITORIA

ANALYTICAL CAPABILITIES
  • LLL, L-G, LL and LL-G fault application and removal
  • Global setting of control parameters for generators, motors and electronically coupled generating units
  • Line switching and line reclosing
  • Single pole switching including line charging effects
  • Load shedding and load adding
  • Generation loss
  • Disconnection of lines, cables and transformers
  • Tripping and reclosing of protective devices
  • Frequency-dependent modeling of generators
  • Networks with multiple nominal frequencies
  • Ability to monitor specific equipment during the simulation
  • Load modeling as a function of voltage and frequency at individual bus bars or throughout the system
  • Disconnection of static VAR compensator controls
  • Addition and removal of shunts
  • Direct on-line or assisted induction motor starting and stopping
  • Direct on-line or assisted synchronous motor starting
  • Automatic validation of maneuvers and their sequencing in time
  • Verification of equipment and controller data
  • Ability to vary the integration step during the simulation
  • Ability to interrupt the simulation temporarily and restart
  • Range validation for controller settings and simulation parameters
CONTROL MODEL LIBRARY

The control model library of Eaton's CYME Transient Stability analysis module is an extensive library of dynamic models of equipment and their controls. This includes default data values of the parameters, their description and block diagrams as per published transactions and papers.

This includes control models of:

  • Round poles and salient poles generators
  • Modeling of excitation systems taking saturation into account, based on IEEE standards
  • Power system stabilizers
  • Governor models comprising hydraulic, thermal, diesel, and gas turbines
  • Detailed modeling of static-VAR compensators
  • Under-voltage, under-frequency, frequency droop relays and over current relay modeling
  • Impedance relay with typical circular trip characteristics including single reset time reclosing
  • Induction motor models with frequency dependent modeling
  • Dynamic modeling of distributed generation such as Wind Energy Conversion Systems (WECS), photovoltaic (PV cells), fuel cells and micro turbines 
USER-DEFINED MODELING

The Transient Stability analysis module features a unique ability to supplement the existing array of control models for system equipment and controllers, providing the user the opportunity to model any desired control system using user-defined modeling.

The user-defined modeling approach is based on the premise of solving user-defined equations. The program is provided with an extensive library of elementary functions and building block controls to model any control scheme, including system-wide operations.

The model can be created with a simple text editor and there is no need to recompile the software to integrate the new model into the library.

The control model library is so flexible in its design that the user can create or import into the library any control model created with the built-in user defined modeling functions. This includes any model created previously for the PSAF software or any new one that the user may wish to add to Eaton's CYME software library in order to include it in any study requiring such a model. In addition, the user can import dynamic model block diagrams in bitmap image format.

DYNAMIC MODELING OF DISTRIBUTED ENERGY RESOURCES
The Transient Stability analysis module includes extensive modeling capability of Distributed Energy Resources (DER) equipment such as Wind Energy Conversion Systems (WECS), photovoltaic, fuel cell and micro turbine dynamics. The advanced solution algorithms provide the user with the necessary tools to carry out power system studies comprised of these types of installations. 

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