PSAF

CYMFLOW

Power Flow Analysis

Overview

CYMFLOW is the analysis module of PSAF dedicated to power flow analysis in three-phase electric power networks. It is equipped with powerful analytical options and alternative solution techniques.


Program Features

CYMFLOW utilizes state of the art sparse matrix/vector methods and multiple solution algorithms:

* Full Newton-Raphson.
* Fast Decoupled (with or without constraints).
* Gauss-Seidel.

piping software

CYMFLOW is the main analysis module of PSAF and has a seamless interface with the other PSAF Modules namely:

* CYMFAULT to communicate the pre-fault voltage profile, current flows and transformer tap positions, for fault studies taking into account pre-fault system loading.
* CYMHARMO to communicate the fundamental frequency voltages and currents for harmonic distortion calculations.
* CYMSTAB to communicate the initial conditions to the transient stability simulator.
* CYMVSTAB for static Voltage Stability Studies.
* CYM-Motor Start account for system wide voltage drops during motor start.
* CYM-AC Contingency to solve unlimited variations of a base network.

Analytical Capabilities

* Analyze Networks with thousands of buses and branches.
* Multiple swing buses allowed.
* Automatic swing bus selection for isolated subsystems.
* Distributed Swing bus option.
* Simultaneous solution for islanded networks.
* Area Interchange with area control generators.
* Generator reactive power limits and remote voltage control.
* Local or remote control of voltage and reactive power flow through tap changing transformers.
* Control of real power flow through phase-shifting transformers.
* Switchable shunt element.
* Generalized load modeling, including Constant Power, Impedance and Current.
* Representation and control of DC lines.
* Wind Energy Conversion Systems (WECS).
* Modeling and representation of FACTS devices (UPFC and STACOM).
* Transformer inrush currents.
* Color coding on the network One-Line Diagram of overloaded equipment and buses with voltage violations.
* User-defined units for Bus voltages and line flows for both tabular and graphical results.
* Tabular reports can also be directly exported to other spreadsheet programs such as MS-Excel.