Dispatcher Power Flow

Design Features

PRISM Dispatcher Power Flow (DPF) software is part of the EMS software suite.  It can be executed either in real-time or in off-line study mode.  Through the PRISM Graphical Operator Interface, the user can specify what case is to be evaluated.  These can be either the real-time data, a set of previously saved cases, data input manually or imported through a file.


DPF supports three load flow solution algorithms: 

  • Full Newton-Raphson solution
  • Fast Decoupled Solution
  • Gaussian Solution 


All three solutions are available at all times, employ the same database and user dialogue, and can be used interchangeably.  DPF provides a full set of tools for quick creation of operating scenarios in the study mode.


All DPF solution algorithms support the following features:

  • Transformer and generator adjustment to control voltage at local or remote buses
  • Switched reactive power devices adjusted to hold a scheduled voltage
  • Two-terminal and multi-terminal DC transmission lines
  • Interchange control between areas
  • Limit checking and violation alarming of branch flows and bus voltages


Power Flow modules are supported by a number of display facilities, each dedicated to a particular application in the control center environment: 

  • All system voltages and power flows can be compared to specified limits; PRISM SecureSuite will alarm any values, which violate their assigned limits.
  • All system operating quantities can be transferred to the PRISM Interface module, from which they can be accessed by the standard Operator Interface.
  • Summary reports are available for individual buses, for specified groups of buses, or for the entire system.
  • On an area or island basis, DPF can display summary information that shows the characteristics of subdivisions of the power system.

More Information

For more information call 800.831.7223 or contact This email address is being protected from spambots. You need JavaScript enabled to view it.