Power Flow Control by Unified Power Flow Controller

Abstract

The demand for electricity is increasing day by day and we have to produce more electrical energy to meet the load demands. Most of the experts prefer to extend the existing electrical networks over building the new network with greater costs. In this paper, the implementation of the flexible AC transmission systems (FACTS) devices in a simple electrical network is described. FACTS devices enhance power transfer capacity of the line without laying out new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. Moreover, this paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.

Impact of the UPFC on the optimal transmission switching for cutting down market power cost

“…As revealed in the study of [25], the reactive power 𝑄𝑄 𝑇𝑇𝑆𝑆𝑇𝑇 is injected or absorbed by the SVC based on the 𝑉𝑉 𝑖𝑖 . Thus:…”

Design Coordination of a Fuzzy-based Unified Power Flow Controller with Hybrid Energy Storage for Enriching Power System Dynamics

“…Many researchers presented combinations of fuzzy-based UPFCs [11][12][13]. However, they did not focus on the effects of the hybrid energy storage during abnormal conditions [14][15][16]. The above mentioned authors did not covered in depth the hybrid energy storage, which consists of a supercapacitor with lithium-ion batteries connected across the Vdc of the UPFC, during large sudden disturbances in a power network.…”

FLC based on static var compensator for power system transient stability enhancement

“…As a result of this overload, the transient stability issue appeared [2]. Transient stability is the capability of a system to be able to return to its normal state after experiencing large disturbances such switching on-off lines and faults [3,4]. In recent decades, devices under the term FACTS have emerged, which have greatly helped improve the stability of power systems by controlling system voltage [5].…”