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Power flow analysis

The objective of a power flow program is to analyze the steady-state performance of the power system under various operating conditions. 
Eaton's CYME Power Flow analysis module of the CYME power engineering software is used for the analysis of three-phase electric power networks. It is equipped with powerful analytical options and alternative solution techniques for industrial and transmission power systems. 



Eaton's CYME Power Flow analysis software utilizes state-of-the-art sparse matrix/vector methods and multiple solution algorithms:

  • Full Newton-Raphson
  • Fast Decoupled
  • Gauss-Seidel

The Power Flow program is the main module of the CYME software for the analysis of industrial and transmission power systems, and it has a seamless interface with other modules, such as:

  • Fault Analysis: for fault studies taking into account pre-fault system loading
  • Harmonic Analysis: for the calculation of the fundamental frequency voltage and current profiles  required for harmonic distortion indices calculations
  • Transient Stability: to set the initial condition of the system as required by the network control models for transient stability studies
  • Dynamic Motor Starting module: to account for system-wide voltage drops during induction and synchronous motor starting studies
  • Analyzes networks with thousands of buses and branches
  • Multiple swing buses allowed
  • Automatic swing bus selection for isolated subsystems
  • Simultaneous solution for islanded networks
  • Detailed equipment modeling of induction and synchronous motors, variable frequency drives, bus ways and all necessary network elements for an accurate representation of the network
  • Synchronous generator
    • Reactive power limits and remote voltage control
    • Generator reactive power capability curves
  • Local or remote control of voltage and reactive power flow through tap changing transformers
  • Phase angle shift transformer with active power control
  • Cogeneration modeling, including:
    • Induction generators
    • Wind Energy Conversion Systems (WECS)
    • Photovoltaic (PV Cells)
    • Fuel cells
    • Micro-turbines
  • Comprehensive representation of DC transmission lines with rectifier and inverter controls
  • Flexible AC Transmission Systems (FACTS) representation of:
    • Static synchronous compensator (STATCOM)
    • Unified Power Flow Controller (UPFC)
  • Customer load model library manager for any type of load model including:
    • Constant power, constant current and constant impedance
    • Composite load model
    • Voltage sensitivity exponent load model
  • Capacitors with the following control types: voltage, current, reactive current, reactive power, power factor, temperature and time-controlled
  • Switchable shunt banks of both capacitive and inductive elements
  • Scaling factors applied to the generators and to the loads on the whole network or by zone
  • Global parameters to include or exclude any types of equipment from the analysis
  • Five limit categories for nominal, planning, emergency loading or any user-defined criteria
  • User-defined units for bus voltages, generator productions and branch flows on both one-line diagrams and tabular reports
  • Tabular reports can also be directly exported to other spreadsheet programs, such as Microsoft Excel
  • Color coding on the network one-line diagram as per user-defined criteria, for example:
    • Overloaded equipment
    • Voltage violations of buses and nodes
    • Visualization of conductor rating that may reflect, for example, improperly sized cables
    • System voltage levels (maybe with image)

Need product support?

CYME users portal:

P: 450-461-3655 or 800-361-3627 (Canada & US)


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