Open AccessDetermining potential stability enhancements of flexible AC transmission system devices using corrected transient energy function
Author(s) -
Aghaei Jamshid,
Zarei Mahdi,
Asban Mohammadreza,
Ghavidel Sahand,
Heidari Alireza,
Agelidis Vassilios G.
Publication year - 2016
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2015.0849
Subject(s) - transient (computer programming) , control theory (sociology) , computer science , capacitor , thyristor , energy (signal processing) , electric power system , fault (geology) , waveform , voltage , power (physics) , electrical engineering , engineering , physics , control (management) , artificial intelligence , operating system , quantum mechanics , seismology , geology
In this study, the calculations of flexible AC transmission system (FACTS) devices energy function and corrected transient energy function (CTEF) in presence of FACTS are formulated. The most versatile FACTS devices are modelled for transient‐stability assessment using CTEF. Furthermore, the effects of FACTS devices on the corrected transient margin are evaluated by considering the corrected transient energy margin (CTEM), corrected transient kinetic energy (CTKE), and fault critical clearing time (CCT). The proven formulations are applied and compared on three different networks, 3‐bus, 39‐bus, and 145‐bus test systems. All evaluations are compared with each other in the presence and absence of the FACTS devices, and the results of simulation and direct method are investigated. It is proven that by using the energy functions of static VAr compensator, thyristor‐controlled series capacitor, and unified power flow controller, the results of the direct method and the simulation method are almost equal. Also, the efficient criteria in identifying first swing stability behavior are developed for the hybrid method to evaluate the CTEM. Test results do not show any irregular non‐linearity on the variations of CTEM, CTKE, and CCT for both plant and inter‐area mode disturbances.