Distribution State Estimation

Distribution State Estimation

Distribution State Estimation

Unbalanced Load Allocation and Non-Technical Loss Calculation
With the penetration of distributed generations into distribution network, real-time model based monitoring of the network using distribution state estimation is essential for traditional unbalanced distribution networks. Distribution State Estimation utilizes load allocation techniques to further provide real-time reporting of technical and non-technical power losses.


Distribution State Estimation Key Features

  • Estimate individual loads on a feeder based on load classes, load type, load curve, and load measurements
  • Integrates with transmission state estimation to provide a unified and complete picture of an integrated transmission and distribution system
  • Distribution State Estimation can operate in power networks:
    • With or without verification of telemetered measurements
    • With manual or automatically processing unobservable parts of network
    • With or without fixed measurements
    • All historical data are known
    • Networks with no historical data available (based on parameters of the network elements) and also according to users setting


  • Distribution State Estimation utilizes historical data of the network including:
    • Daily load profiles based on class types, day of week and weather conditions
    • Peak loads for distribution transformers and/or consumers and/or energy transfer
  • Distribution State Estimation considers into account the non-availability of real time data and compensates them with historical data, pseudo and virtual measurements, to achieve the minimal set of input data necessary for running a consistent power flow
  • Real-time tabular reporting of technical and non-technical losses per feeder and per substation



White Papers



Trainings & Events

ETAP Training

Trainings & Events

Get an in-depth insight to our electrical engineering software by requesting a training course that suits you.

Discover Now


Push the boundaries of what's possible
with ETAP Software

Keep up with demand, reduce error and waste, and accelerate
efficiency with the power of AI. Arc Flash is available in our software
and native to Design and Make Platform to help you reach new levels
of innovation and creativity.