Determining potential stability enhancements of flexible AC transmission system devices using corrected transient energy function. Issue 2 (1st February 2016)

• Record Type: Journal Article
• Authors: Aghaei, Jamshid; Zarei, Mahdi; Asban, Mohammadreza; Ghavidel, Sahand; Heidari, Alireza; Agelidis, Vassilios G.
• Is Part Of: IET generation, transmission & distribution. Volume 10:Issue 2(2016)
• Page Start: 470
• Page End: 476
• Publication Date: 2016-02-01
• Subjects: flexible AC transmission systems -- power system transient stability; potential stability enhancements -- flexible AC transmission system devices -- corrected transient energy function -- transient‐stability assessment -- FACTS devices -- CTEM -- corrected transient kinetic energy -- CTKE -- fault critical clearing time -- CCT -- 145‐bus test system -- 39‐bus test system -- 3‐bus test system -- static var compensator -- thyristor‐controlled series capacitor -- unified power flow controller -- first swing stability behaviour; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2015.0849
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : 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.