Welcome to InterPSS Documentation

InterPSS is a comprehensive power system analysis engine designed for both online and offline applications.

🎓 InterPSS Tutorials 📖 API Documentation 📋 InterPSS Development and Application Guide

Key Features

  • API-first and Rich APIs - More than 10,000 APIs covering all models, solvers and result processing are publicly available for integration and customization.
  • Light-weight yet Powerful - The core module is less than 4 Mb and the total size including dependent packages is less than 70MB (as of August 2025); it can solve large-scale power systems upto ~ 100,000 buses.
  • Cloud Native and Cross-platform (Win, Linux, Mac) - Native Java design, highly portable across platforms, and easy for cloud deployment
  • AC/DC Load Flow Analysis - Comprehensive power flow calculations for transmission (positive-sequence) and distribution (three-phase) systems
  • Contingency Analysis - Super-fast N-1 and N-K contingency analysis and result processing, e.g., 25,000 N-1 contingencies within 10 seconds with using an average desktop with 8-core CPUs
  • Sensitivity Analysis - Various sensitivity calculations such as LODF and GSF for power trading applications and integration with optimization solutions
  • Short Circuit Analysis - Three-sequence network modeling and comprehensive system fault analysis
  • Dynamic Stability Analysis - Transient stability simulations for transmission and distribution systems invidividually or combined

License

  • InterPSS is free for non-commercial use, detailed can be found in the our license document
  • Commercial licensing and commercial solutions are available,for commercial licensing inquiries, contact: interpss@gmail.com; for commercial solutions, please contact info@wattbyte-nexus.com

Resources

Publications

  • M. Zhou and S. Zhou, “Internet, Open-source and Power System Simulation,” 2007 IEEE Power Engineering Society General Meeting, Tampa, FL, USA, 2007, pp. 1-5, doi: 10.1109/PES.2007.385492. PDF
  • Q. Huang and V. Vittal, “Integrated Transmission and Distribution System Power Flow and Dynamic Simulation Using Mixed Three-Sequence/Three-Phase Modeling,” in IEEE Transactions on Power Systems, vol. 32, no. 5, pp. 3704-3714, Sept. 2017, doi: 10.1109/TPWRS.2016.2638910. PDF, Code
  • Q. Huang and V. Vittal, “Application of Electromagnetic Transient-Transient Stability Hybrid Simulation to FIDVR Study,” in IEEE Transactions on Power Systems, vol. 31, no. 4, pp. 2634-2646, July 2016, doi: 10.1109/TPWRS.2015.2479588. PDF
  • Q. Huang and V. Vittal, “OpenHybridSim: An open source tool for EMT and phasor domain hybrid simulation,” 2016 IEEE Power and Energy Society General Meeting (PESGM), Boston, MA, USA, 2016, pp. 1-5, doi: 10.1109/PESGM.2016.7741233.PDF, Code
  • Q. Huang, R. Huang, W. Hao, J. Tan, R. Fan and Z. Huang, “Adaptive Power System Emergency Control Using Deep Reinforcement Learning,” in IEEE Transactions on Smart Grid, vol. 11, no. 2, pp. 1171-1182, March 2020. PDF, Code