OpenDSS — The Complete Guide: Distribution Grid Simulation and Renewable Integration
OpenDSS is an electric distribution system simulator developed by the research institute EPRI and released under the BSD licence. Unlike tools focused on the transmission grid, it is built for long, unbalanced, three-phase distribution feeders — exactly where solar PV, batteries and EV chargers connect. The model is written as a text script of commands, and the engine can be driven from Python and Matlab.
OpenDSS
Electric Power Research Institute (EPRI)
EPRI’s electric distribution system simulator: power flow, harmonics, faults and hosting-capacity studies for solar PV, storage and electric vehicles.
Get it from the vendorWhat you get
- Power flow — voltages and currents on an unbalanced network, phase by phase.
- Time series — runs over load and generation profiles across a day or a year.
- Faults and harmonics — short-circuit currents and harmonic distortion studies.
- Hosting capacity — how much distributed generation a feeder can take before limits are violated.
- Programmatic control — automating hundreds of scenarios from Python or Matlab.
Who it suits
Power-system engineers, utilities and researchers working on grid connections and distribution planning. There is no polished graphical interface — the work happens in text files and scripts, so some programming comfort helps.
Related tools
For distribution simulation that also models buildings and markets — GridLAB-D. For network analysis in Python with a friendly API — pandapower. For computing the solar generation profiles that feed the model — pvlib.
GridLAB-D
Pacific Northwest National Laboratory (PNNL)
PNNL power-distribution simulator with models of loads, buildings, distributed generation and storage.
Get it from the vendor
pandapower
University of Kassel and Fraunhofer IEE
Power grid analysis in Python — load flow, optimal power flow, short circuit and state estimation for distribution and transmission.
Get it from the vendor
pvlib python
pvlib python contributors
A Python library for solar PV modelling — sun position, irradiance on tilted surfaces and PV system output.
Get it from the vendor
PyPSA
PyPSA community (TU Berlin)
Optimisation of power and energy systems — economic dispatch, capacity expansion, storage and sector coupling.
Get it from the vendorThe bottom line
OpenDSS is a serious, well-known workhorse for distribution grid studies. Open source and completely free, including for commercial work.