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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. 

Power flow analysis module

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
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  • 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)
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CYME Power flow analysis module

Eaton’s CYME power flow analysis module analyzes industrial and transmission power systems.

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Need product support?

CYME users portal: my.cyme.com

Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.
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