Update README.md

Author: h-bode

README.md

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-# OpenModelica_Microgrids
+# OpenModelica_Microgrids
+  
+OpenModelica_Microgrids is a free package that is developed with the Modelica language from the [Modelica Association](https://www.Modelica.org).
+
+It was designed in the scope of the [OpenModelica Microgrid Gym (OMG)](https://github.com/upb-lea/openmodelica-microgrid-gym) project. 
+
+This Library can be used either to create microgrids for the OMG toolbox, or to create custom microgrids and test control structures for them.
+
+## Example
+
+A small network is shown below:
+
+![alt text](https://raw.githubusercontent.com/h-bode/OpenModelica_Microgrids/master/Images/Microgrid.png)
+
+Controller designs and their parametrization can be tested:
+
+
+![alt text](https://raw.githubusercontent.com/h-bode/OpenModelica_Microgrids/master/Images/simulation.png)
+
+
+## Usage
+OpenModelica_Microgrids is designed and tested with OpenModelica and should load correctly if the [Modelica Standard Library](https://github.com/modelica/Modelica) is available. 
+
+## Copyright
+2020, chair of Power Electronics and Electrical Drives, Paderborn University
+
+## License
+The ModPowerSystems package is free software and the use is completely at your own risk. It can be redistributed and/or modified under the terms of the [Modelica License 2](https://www.modelica.org/licenses/ModelicaLicense2).
+
+## Contact
+
+* Henrik Bode <bode@lea.uni-paderborn.de>
+
+
+[Chair of Power Electronics and Electrical Drives (LEA), Paderborn University](https://ei.uni-paderborn.de/en/lea)