Note: 'abc' and 'dqo' denote different representations of the same physical models. See UsersGuide.Introduction.

You may work with a reduced library according to your needs:

- You may copy Spot and remove ACabc, DrivesACabc and GenerationACabc

- You may also remove instead ACdqo, DrivesACdqo and GenerationACdqo (less recommended!)

- The corresponding packages in SpotExamples should then also be removed.

**System**

Represents a global reference for the choice of system parameters and simulation modes.**Base**

Contains coefficient records, complex functions, icons, interfaces, mathematical- and precalculation-functions, transforms, type declarations mainly for alternative SI | pu types, and some rudimentary components for visualisation.**AC1_DC**,**ACabc**,**ACdqo**

These three packages exhibit essentially the same structure. They contain the elementary electrical components for one-phase or DC and for three-phase AC applications.

AC one-phase and DC components are modelled as two-conductor components, although the elementary impedances exist also in a one-conductor version. Sources, loads, shunts and the like therefore have one single electric connector, similar to their three-phase relatives. This also contributes to a more homogeneous appearance of the library, both for single components and for complete models. Yet it has also physical reasons, as for example a finite line impedance can only be defined using a pair-conductor.

ACabc and ACdqo are complementary packages, treating identical three-phase components, one in abc-, the other in dqo-representation. Both declaration and equation part of the models keep an identical or analogous structure as far as possible.

All AC models use connectors, containing the reference angles theta[1:2]. The angles are needed within the packages ACabc and ACdqo, theta[1] in the initial equations, theta[2] in the dynamical equations.**Common**

Common components: auxiliary blocks (multiplexers, special signals and transforms), simple idealised functions for iron-saturation, plasma-arcs of breakers or faults, a collection of ideal semiconductor components and modules, and kernel models for switches and breakers.**Control**

This package should**not**be considered as an exhaustive collection of control-components for power-systems. It contains elementary versions allowing the simulation of generators, drives and inverters:

exciters for synchronous machines (generators), turbine governors, ignition tables and PWM-modulation for inverters, relays, setpoints and tap-change control (*presently still empty!*).**AC-Drives abc**,**AC-Drives dqo**,**DC-Drives**

Contains AC-drives with asynchronous and synchronous machines, both with abc and dqo electric terminals, and DC-drives with electric and permanent magnet excitation.**AC-Generation abc**,**AC-Generation dqo**

Contains generation packages with synchronous generators and turbines, both with abc and dqo electric terminals. Some of the models should be considered as example-models, as for example the turbo-group models.**Mechanics**

Contains elementary mechanical components, both translational and rotational, that are needed for simulation of power-stations and rail vehicles.

In addition it contains examples of turbo-groups and default-models for turbine torque.**Examples**

Introductory examples, example models for testing single components, drives, inverters, transformation, generation, transmission precalculation and some example data. Details are found under 'Examples'.

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