feat: bring in ditto and OMF from NREL

Author: timyardley

tools/simulation/README.md

@@ -4,11 +4,13 @@ Developed as a community asset
 
 ## Grid Simulation Tools
 
-- [OpenDSS](http://smartgrid.epri.com/SimulationTool.aspx) - The OpenDSS is a comprehensive electrical power system simulation tool primarily for electric utility power distribution systems. It supports nearly all frequency domain (sinusoidal steady‐state) analyses commonly performed on electric utility power distribution systems.
+- [DiTTo](https://github.com/NREL/ditto) - DiTTo is a Distribution Transformation Tool that aims at providing an open source framework to convert various distribution systems modeling formats.
 - [GridDyn](https://github.com/llnl/griddyn) - is an open-source power transmission simulation software package developed at Lawrence Livermore National Laboratory. The name is a concatenation of Grid Dynamics, and as such usually pronounced as "Grid Dine". It was created to meet a research need for exploring coupling between transmission, distribution, and communications system simulations.
 - [GridLab-D](http://www.gridlabd.org) - GridLAB-D™ is a new power distribution system simulation and analysis tool that provides valuable information to users who design and operate distribution systems, and to utilities that wish to take advantage of the latest energy technologies. It incorporates the most advanced modeling techniques, with high-performance algorithms to deliver the best in end-use modeling. GridLAB-D™ is coupled with distribution automation models and software integration tools for users of many power system analysis tools. Source code [here](https://github.com/gridlab-d/gridlab-d)
 - [MatDyn](https://www.esat.kuleuven.be/electa/teaching/matdyn/) - MatDyn is a free Matlab based open source program to perform dynamic analysis of electric power systems, inspired by Matpower.
 - [matpower](https://matpower.org) - Free, open-source tools for electric power system simulation and optimization
+- [OMF](https://github.com/dpinney/omf) - The Open Modeling Framework for smart grid cost-benefit analysis. Open Modeling Framework (OMF) is a set of Python libraries for simulating power systems behavior with an emphasis on cost-benefit analysis of emerging technologies: distributed generation, storage, networked controls, etc.
+- [OpenDSS](http://smartgrid.epri.com/SimulationTool.aspx) - The OpenDSS is a comprehensive electrical power system simulation tool primarily for electric utility power distribution systems. It supports nearly all frequency domain (sinusoidal steady‐state) analyses commonly performed on electric utility power distribution systems.
 - [pandapower](http://www.pandapower.org) - An easy to use open source tool for power system modeling, analysis and optimization with a high degree of automation.
 - [PowerWorld Simulator](http://www.powerworld.com) - PowerWorld Simulator is an interactive power system simulation package designed to simulate high voltage power system operation on a time frame ranging from several minutes to several days. The software contains a highly effective power flow analysis package capable of efficiently solving systems of up to 250,000 buses. **[Commercial, Free for educational use.]**
 - [PSLF](http://www.geenergyconsulting.com/practice-area/software-products/pslf) - Effective power system analysis often requires large-scale simulations and manipulation of large volumes of data. When performing these analyses, efficient algorithms are just as important as the engineering models in which the data is used. GE Energy recognizes these imperatives, and has developed Concorda PSLF. The algorithms in the PSLF suite have been developed to handle large utility-scale systems of up to 80,000 buses. A complete set of tools allows the user to switch smoothly between data visualization, system simulation, and results analysis. **[Commercial]**