DIgSILENT GmbH is a German company that develops PowerFactory, a Windows-based integrated power systems modelling and analysis package. DIgSILENT PowerFactory is easy to use and caters for all standard power system analysis needs, including high-end applications in new technologies such as wind power and distributed generation and the handling of very large power systems. In addition to the stand-alone solution, the PowerFactory engine can be smoothly integrated into GIS, DMS and EMS supporting open system standards.

Some of the functions include power flow analysis, fault analysis, stability analysis, network reduction, protection analysis, electromagnetic transients analysis, motor starting analysis, OPF, harmonic load flow, state estimation, contingency and reliability assessments, overhead line and cable parameter calculation, distribution network analysis, eigenvalue / modal analysis.

Features include a C++ style scripting language called the DPL and a single, integrated, flexible database.

Reference: PowerFactory