Busbar
Conector de barra colectora para análisis de flujo de carga
Bibliotecas:
Simscape /
Electrical /
Connectors & References
Descripción
El bloque Busbar es un conector para el análisis de flujo de carga. Utilice este bloque con redes trifásicas de Simscape™ Electrical™ compatibles con el modo de simulación de tiempo y frecuencia. Una vez finalizada la simulación, el bloque añade una anotación que ilustra tensión, fase, potencia activa y potencia reactiva en cada uno de los puertos de transferencia eléctrica trifásicos en el momento en el que comenzó la simulación. Para añadir la anotación, el registro de Simscape debe estar activado.
El bloque simulará en el modo de simulación basado en el tiempo, pero no añadirá la anotación con los resultados de flujo de carga inicial a menos que la red sea compatible con el modo de simulación de tiempo y frecuencia y, en el bloque Solver Configuration, se active Start simulation from steady state. No obstante, cuando se utiliza el modo de simulación basado en el tiempo, el bloque calcula valores aproximados de tensión, fase, y potencias activa y reactiva. Puede consultar estos valores en el registro de Simscape o exponiendo los puertos de medición opcionales en el bloque. El nivel de aproximación depende de lo equilibrado que esté el sistema y del nivel de armónicos presentes.
Ejemplos
Flujo de carga de 2 buses
A model of a two-bus three-phase power system network. The model uses three instances of the Load Flow Source block from Simscape™ Electrical™, one configured to be the swing bus, one configured to be the PV bus, and one configured to be the PQ load. The PV bus regulates its output to be at a voltage of 1.025 times rated voltage and to deliver 80MW active power to the network. The Swing bus regulates voltage at the other end of the transmission line to be one times rated voltage, and it delivers the requisite power to the network so that overall active and reactive powers balance. The Simscape initialization solver determines the required internal initial voltage amplitudes and phases in both the PV bus and the Swing bus so as to start in steady state.
Flujo de carga de 9 buses de IEEE
A model of a 9-bus three-phase power system network. This example is based on an IEEE® benchmark test case, further details of which can be found in "Power System Control and Stability" by P. M. Anderson and A. A. Fouad (IEEE Press, 2003). Simscape™ initializes two of the generators to the specified powers and terminal voltages, and initializes the remaining swing bus generator to meet just the specified voltage. The resulting load flow solution is appended to each of the busbars post-simulation. The four rows correspond to per-unit voltage, phase, active power, and reactive power respectively. Looking at Bus 1, it can be seen from the annotation that the swing generator delivers 76.4MW of active power and 27.5MVAr or reactive power to the network. Differences to the original benchmark are due to the transmission line models and transformer configurations used.
Inicialización de motor de inducción con flujo de carga
Initialize a three-phase induction motor as part of a load flow analysis. When initializing an induction machine that is directly connected to an AC network, in steady state there is one degree of freedom which you can set by any one of shaft torque, shaft power, motor speed, or electrical power.
Inicialización de máquina síncrona con flujo de carga
Initialize synchronous machine as part of a load flow analysis. When initializing a synchronous machine there are two degrees of freedom which can be set by any two of rotor angle, active power, reactive power and terminal voltage. The pair of variables that are constrained is set by the source type drop-down menu, this having options of Swing bus, PV bus and PQ bus. Here the machine is configured for a swing bus with a 1.02 per-unit voltage and zero degrees phase.
IEEE 9-Bus System
Model a 9-bus three-phase power system network. This example is based on the IEEE® benchmark test case. For more information, see "Power System Control and Stability" by P. M. Anderson and A. A. Fouad (IEEE Press, 2003).
Puertos
Salida
Transferencia
Parámetros
Capacidades ampliadas
Historial de versiones
Introducido en R2019b
