Dynamic behavior of small systems up to large power systems can be analyzed in time domain. Effects which are to be examined are for example electro-magnetic transients and different aspects of stability in power systems. For modelling different machines and various controller units as well as the electrical and mechanical parts of power plants, etc., there is the possibility of using a variety of predefined models in the global library of PowerFactory.
Dynamic behavior of small systems up to large power systems can be analyzed in time domain. Effects which are to be examined are for example electro-magnetic transients and different aspects of stability in power systems. For modelling different machines and various controller units as well as the electrical and mechanical parts of power plants, etc., there is the possibility of using a variety of predefined models in the global library of PowerFactory.
Dynamic behavior of small systems up to large power systems can be analyzed in time domain. Effects which are to be examined are for example electro-magnetic transients and different aspects of stability in power systems. For modelling different machines and various controller units as well as the electrical and mechanical parts of power plants, etc., there is the possibility of using a variety of predefined models in the global library of PowerFactory.
Dynamic behavior of small systems up to large power systems can be analyzed in time domain. Effects which are to be examined are for example electro-magnetic transients and different aspects of stability in power systems. For modelling different machines and various controller units as well as the electrical and mechanical parts of power plants, etc., there is the possibility of using a variety of predefined models in the global library of PowerFactory.
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Volume V
Stability Analysis & Simulation of
Transients
DIgSILENT PowerFactory
Version 13.2osO
DIGSIUENT PowerFoctory “Tre Domain Simuiations
Chapter 22
Time-Domain Simulations
With the transient simulation functions of DIgSILENT PowerFactory the dynamic be-
havior of small systems up to large power systems can be analyzed in time domain, So it
is possible to model complex systems from industrial networks up to large transmission
grids in detail taking into account electrical as well as mechanical perameters.
‘Transients as well as stability and control problems in modern power systems constitute
important considerations during the planning, design and operation of these complex sys-
tems. The effects which are to be examined are for example electro-magnetic transients
and different aspects of stability In power systems. These can be analyses with Power-
Factory using different methods like verious functions of time-domain simulations for
varying time periods as well as dynamic or small-signal stability analysis tools using e.9.
the powerful eigenvalue analysis.
‘There Is a very large range of systems which can be analyses. For example it is easily
possible to analyze AC or DC systems (e.g. motor start-up, transmission systems with de-
tailed models of the power plants, complex HVDC systems) as well as a combination of
both, Also new study fields like wind-power or power electronics applications constitute
new challenges in the analysis of power systems and new models and techniques are pro-
vided to meet these requirements.
For modelling different machines and various controller units as well as the electrical and
mechanical parts of power plants, etc,, there is the possibility of using a variety of pre~
defined models in the global library of PowverFactory. This model library includes various
models of generators, motors, controllers, motor driven machines, dynamic loads and
passive network elements, For example the IEEE standard models of controllers of power
plants can be found here, Furthermore specific models of controllers and block diagrams
of power plants can be modelled with a high degree of freedom.
22.1 Introduction
To study and analyses power system stability the behavior of power systems under con-
ditions before and after sudden changes in load or generation or during faults or outages
of elements have to be examined. The robustness of a system is defined by the ability of
the system to maintain stable operation under normal and perturbed conditions. There-
fore it is necessary to design and operate a power system so that transient events, e.g.
probable contingencies in the system, can be sustained without the loss of load or loss of
synchronism in the power system. Transients in electrical power systems can mainly be
divided into three time domains:
* short-term, or electromagnetical transients,
‘+ mid-term, or electromechanical transients.
+ long-term transients
22-1
(IET Energy Engineering 2) Nand Kishor, Jesus Fraile-Ardunuy - Modeling and Dynamic Behaviour of Hydropower Plants-The Institution of Engineering and Technology (2017)