Parallel‐differential evolution approach for optimal event‐driven load shedding against voltage collapse in power systems. Issue 4 (1st April 2014)

• Record Type: Journal Article
• Authors: Xu, Yan; Dong, Zhao Yang; Luo, Fengji; Zhang, Rui; Wong, Kit Po
• Is Part Of: IET generation, transmission & distribution. Volume 8:Issue 4(2014)
• Page Start: 651
• Page End: 660
• Publication Date: 2014-04-01
• Subjects: evolutionary computation -- load shedding -- optimisation -- power system dynamic stability -- voltage control; parallel‐differential evolution approach -- optimal event‐driven load shedding -- voltage collapse -- power systems -- sensitivity‐based linear methods -- P‐DE -- event‐driven load shedding -- parallel structure -- candidate buses selection -- voltage stability assessment -- VSA -- DE optimisation -- objective functions -- VSA techniques -- IEEE 118‐bus test system -- preventive control -- corrective control; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2013.0385
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : Event‐driven load shedding is an effective countermeasure against voltage collapse in power systems. Conventionally, its optimisation relies on sensitivity‐based linear methods, which, however, could suffer from unrealistic assumptions and sub‐optimality. In this study, an alternative approach based on parallel‐differential evolution (P‐DE) is proposed for efficiently and globally optimising the event‐driven load shedding against voltage collapse. Working in a parallel structure, the approach consists of candidate buses selection, voltage stability assessment (VSA) and DE optimisation. Compared with conventional methods, it fully considers the non‐linearity of the problem and is able to effectively escape from local optima and not limited to system modelling and unrealistic assumptions. Besides, any type of objective functions and VSA techniques can be used. The proposed approach has been tested on the IEEE 118‐bus test system considering two cases for preventive control and corrective control, respectively, and compared with the two existing methods. Simulation results have verified its effectiveness and superiority over the compared methods.