IEEE 123 Node Feeder Test Case

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IEEE 123 Node Test Feeder test feeder operates at a nominal voltage of 4.16 kV. This circuit is characterized by overhead and underground lines, unbalanced loading with constant current, impedance, and power, four voltage regulators, shunt capacitor banks, and multiple switches.

The guide provided in IEEE123Node.Zip is one of several designed to support skills development in distribution network modeling. It can be used during standard university curricula, a short industry course, self-guided lessons, peer learning, or other training opportunities. Files resulting from the guide can also be modified at the discretion of the user to pursue advanced topics of analysis. The IEEE Test Feeders are used as examples given their wide recognition and use. Resulting power flow analysis and short circuit analysis are presented in separate documents for each test feeder. Each guide is developed through a partnership between Arizona State University researchers and XENDEE. These training guides have been successfully used to train people individually, in small and large classrooms, during interactive microgrid boot camps, and during short sessions for industry integrators and operators.

Shammya Saha

Graduate Research Assistant

Electrical Engineering

Ira A. Fulton School of Engineering

Arizona State University

Nathan Johnson

Assistant Professor

The Polytechnic School

Ira A. Fulton School of Engineering

Arizona State University

Files and Downloads

Overview and Technologies

The document in IEEE123Node.Zip describes how to model the IEEE 123 Node Test Feeder in the XENDEE cloud computing platform.

XENDEE simulation models and system infrastructure documentation are also included with this guide. OpenDSS, an open-source technology developed by the Electric Power Research Institute (EPRI), is a powerful analytics engine capable of simulating complex multi-phase electrical power distribution systems.

XENDEE enhances EPRI OpenDSS with enterprise level features such as visualization, design, simulation, and reporting automation. XENDEE is a web-based analytical tool that runs in Mozilla Firefox (Windows) or Safari (Mac) using the Microsoft Silverlight add-on.

This package ( includes XENDEE model files (.xpf) that can be imported to create a personal XENDEE project library. Additional supporting files required for independent testing and verification are also provided.

IEEE_123_LVRauto.xpf – A XENDEE model that implements line voltage regulators (LVRs) as suggested by EPRI. Specifically, OpenDSS simulates tap changes and then recalculates power flow. Many other software tools complete power flow studies using only estimates of tap changes.

IEEE_123_LVRtapsFixed.xpf – A XENDEE model of the same network but with single-phase transformers with fixed tap settings defined to match IEEE data.

Supporting Files in IEEE13Node.Zip

  • XENDEE XML model with auto-adjusting regulators.
  • XENDEE XML model with fixed tap transformers.
  • Shunt capacitor data.
  • Transformer Parameters.
  • Switch connection between two nodes.
  • Spot load data in kW, kVAR, power factor.
  • Overhead wire model and pole configuration data.
  • Configuration data for each segment.
  • IEEE Power Flow Results.
  • Details of Line Regulator.
  • Excel file to convert Cable data to sequence data.
  • Underground Cable configuration data.

Data for the IEEE 123 Node Test Feeder can be downloaded from the Web at

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To learn more about Professor Johnson's research, visit

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