Optimal Location of Facts for ATC Enhancement

Abstract — According to the changes in power structure (deregulation), competitive markets became in urgent need to have ability to satisfy the rise of energy demands. However, it is limited by the existing transmission grids; therefore, the markets pay attention to have efficient utilization of the current transmission system that comes through the Available Transfer Capability (ATC) which is computed using proposed technique named by Repeated Power Flow (RPF). In order to have improvement in ATC, Flexible AC Transmission System (FACTS) devices are used to control power flow (PF), thus improve the power profile in the transmission system. In this paper, two types of controllers are used Static Synchronous Compensator (STATCOM) and Unified Power Flow Controller (UPFC). The insertion of the controller in the power system comes through determining the particular location in the transmission system; the proposed method for optimal position is called Loss Sensitivity Index (LSI). This paper is applied on 5, 14 and 24 Bus Test Systems and simulated in Power system Analysis Toolbox (PSAT) software. The proposed methods have yielded results in improvement of ATC. Index Terms — ATC, LSI, RPF, STATCOM, UPFC