Szimmetrikus összetevők vizsgálata - Villamos Energetika Tanszék

Introduction
The ATP program calculates variables of interest within electric power networks as functions of
time, typically initiated by some disturbances. Basically, the trapezoidal rule of integration is used
to solve the differential equations of system components in the time domain. Non-zero initial
conditions can be determined either automatically by a steady-state, phasor solution or they can be
entered by the user for some components.
ATP has many models including rotating machines, transformers, surge arresters, transmission
lines and cables. With this digital program, complex networks of arbitrary structure can be
simulated. Analysis of control systems, power electronics equipment and components with
nonlinear characteristics such as arcs and corona are also possible. Symmetric or unsymmetric
disturbances are allowed, such as faults, lightning surges, any kind of switching operations
including commutation of valves. Calculation of the frequency response of phasor networks is
also supported.
ATP includes at present the following components:
Uncoupled and coupled linear, lumped elements.
Transmission lines and cables with distributed and frequency-dependent parameters.
Elements with nonlinearities: transformers including saturation and hysteresis, surge
arresters, arcs.
Ordinary switches, time-dependent and voltage-dependent switches, statistical switching
Valves (diodes and thyristors).
3-phase synchronous machines, universal machines.
MODELS and TACS (Transient Analysis of Control Systems).
MODELS in ATP is a general-purpose description language supported by an extensive set of
simulation tools for the representation and study of time-variant systems. MODELS allows the
description of arbitrary user-defined control and circuit components, providing a simple interface
for connecting other programs/models to ATP. As a general-purpose programmable tool,
MODELS can be used for processing simulation results either in the frequency domain or in the
time domain.
The following supporting routines are available in ATP:
LINE CONSTANTS, CABLE CONSTANTS and CABLE PARAMETERS for calculation
of electrical parameters of overhead lines and cables
Generation of frequency-dependent line model input data: JMARTI Setup, SEMLYEN
Setup and NODA Setup.
Calculation of model data for transformers (XFORMER and BCTRAN).
Saturation and hysteresis curve conversion.
Data Base Modularization
ATP is available for most Intel based PC platforms under DOS, Windows 3.x/95/NT, OS/2, Linux
and for other computers, too (e.g., Digital Unix and VMS, Apple Mac’s, etc.). The program is in
principle royalty free, but requires a license agreement signed by the requester and the
Canadian/American EMTP Users Group, or the authorized regional users group representatives.