Power system simulation: Difference between revisions

Revision as of 03:02, 2 July 2023

Revision as of 02:10, 25 July 2023

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==Load flow calculation==

The load-flow calculation<ref>{{Cite journalbook|last=J. Arockiya|first=Xavier Prabhu|yeartitle=2016 IEEE 6th International Conference on Power Systems (ICPS) |titlechapter=Design of electrical system based on load flow analysis using ETAP for IEC projects |year=2016|journal=Power Systems (ICPS)|pages=1–6|doi=10.1109/ICPES.2016.7584103|isbn=978-1-5090-0128-6|s2cid=10118705 }}</ref> is the most common network analysis tool for examining the undisturbed and disturbed network within the scope of operational and strategic planning.

Using network topology, transmission line parameters, transformer parameters, generator ___location and limits, and load ___location and compensation, the load-flow calculation can provide voltage magnitudes and angles for all nodes and loading of network components, such as cables and transformers. With this information, compliance to operating limitations such as those stipulated by voltage ranges and maximum loads, can be examined. This is, for example, important for determining the transmission capacity of underground cables, where the influence of cable bundling on the load capability of each cable has to be taken also into account.

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When changing over from single and/or multi-phase infeed low-voltage meshed networks to isolated networks, load-flow calculation is essential for operational and economical reasons. Load-flow calculation is also the basis of all further network studies, such as motor start-up or investigation of scheduled or unscheduled outages of equipment within the outage simulation.

Especially when investigating motor start-up,<ref>{{Cite journalbook|last=Hui|first=Zhu|yeartitle=2014 International Conference on Mathematics and Computers in Sciences and in Industry |titlechapter=The Simulation Analysis of Motor Startup Based on the ETAP Platform |journalyear=International Conference on Mathematics and Computers in Sciences and in Industry2014|volume=10.1109/MCSI.2014.36|pages=245–248|doi=10.1109/MCSI.2014.36|isbn=978-1-4799-4324-1|s2cid=24691998 }}</ref> the load-flow calculation results give helpful hints, for example, of whether the motor can be started in spite of the voltage drop caused by the start-up current.

==Short circuit analysis==