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PacDyn allows a detailed modeling of various power system equipments, specially the power system controllers. The dynamic equipment that can be modeled is:

- Generators (choice of 8 models);

-  Automatic Excitation Systems (AVRs);

-  Speed-Governors (GOVs);

-  Power System Stabilizing Signals (PSSs) (for Generators, HVDC Converters and FACTS Devices);

-  Induction Motors (first and third-order models);

-  User Defined Controllers (UDCs) and User Defined Topologies (UDTs).


The power system controllers modeling (Automatic Excitation Systems, Speed-Governors, Power System Stabilizers, etc.) are implemented through built-in models included in PacDyn or User Defined Controllers (UDCs) of any order or topology. These User Defined Controllers are built through the interconnection of various basic elementary control blocks. The program automatically initializes any non-linear control blocks.

The network modeling and operating point are obtained through a power system network analysis program output file. Besides its own network file format, PacDyn is capable of reading various network output file formats, including ANAREDE, PSS/E and EUROSTAG.

Another PacDyn useful characteristic is to allow reading the system dynamic data in various file formats besides its own format. PacDyn is capable of reading dynamic data in PSS/E and EUROSTAG (partially implemented) file formats.

PacDyn is dimensioned to allow the study of large power systems. The program algorithms utilize advanced sparsity techniques, reducing the computational effort to the minimum.

The Brazilian Power System analysis (2380 buses, 3450 branches, 2 HVDC Links, SVC, etc.) can be carried out in a Pentium III computer. The system linear time response simulation in PacDyn is obtained 200 times faster in comparison with non-linear stability analysis program.

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