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ANDES is a Python-based free software package for power system simulation, control and analysis. It establishes a unique hybrid symbolic-numeric framework for modeling differential algebraic equations (DAEs) for numerical analysis. Main features of ANDES include

• Symbolic DAE modeling and automated code generation for numerical simulation.
• Numerical DAE modeling for cases when symbolic implementations are difficult.
• Rapid modeling library with transfer functions and discrete components.
• Automatic sequential and iterative initialization (experimental) for dynamic models.
• Newton-Raphson power flow, trapezoidal method-based time domain simulation, and full eigenvalue analysis.
• Full equation documentation of supported DAE models.

ANDES is currently under active development.

• Jupyter Notebook Examples: Checkout on GitHub.
• Documentation: andes.readthedocs.io.
• Report issues: GitHub Issues page.