An open-source Python toolkit for power system automation, providing a high-performance wrapper for PowerWorld’s Simulator Automation Server (SimAuto). Transforms complex COM calls into intuitive, Pythonic operations.
Intuitive Indexing – Access grid data with pw[Bus, "BusPUVolt"] syntax
Full SimAuto Coverage – All PowerWorld API functions through modular mixins
Pandas Integration – Every query returns a DataFrame
Pythonic Settings – Solver and GIC options as descriptor attributes (pw.max_iterations = 250)
Convenience Methods – Flows, overloads, PTDF/LODF, snapshot context manager, case summary
Transient Stability – Fluent API with TS field intellisense
Analysis Utilities – Built-in GIC, network topology, and contingency tools
Installation
Requires Windows with PowerWorld Simulator (SimAuto enabled) and Python 3.9+.
pip install esappQuick Example
from esapp import PowerWorld
from esapp.components import *
pw = PowerWorld("path/to/case.pwb")
# Read data
bus_data = pw[Bus, ["BusName", "BusPUVolt"]]
# Solve power flow
V = pw.pflow()
# Inspect and modify
violations = pw.violations(v_min=0.95)
pw[Gen, "GenMW"] = 100.0Documentation
Full tutorials, API reference, and examples at esapp.readthedocs.io.
Testing
pip install .[test]
pytest tests/Citation
@article{esa2020,
title={Easy SimAuto (ESA): A Python Package for PowerWorld Simulator Automation},
author={Mao, Zeyu and Thayer, Brandon and Liu, Yijing and Birchfield, Adam},
year={2020}
}License
Distributed under the Apache License 2.0.
1 maintainer
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