A transformer-less unified power flow controller (UPFC) is a electronic device consisting of series and shunt voltage source converters (VSCs) that are not connected to common DC bus. It can control in medium (MV) distribution networks without the need for interfacing transformers. Hence there significant reduction size cost compared conventional UPFC. This paper investigates operating range UP...

This paper describes the use of direct method based on energy function type Lyapunov to evaluate the Critical Clearing Time (CCT) of power system subjected to large contingencies. The two axes model of generator with speed and excitation regulation systems is considered in this study. The power system model takes in consideration the presence of a Unified Power Flow Controller (UPFC). An energy...

FACTS devices plays a significant role to control the power flow of power transmission system. In this paper, a hybrid PSO algorithm is proposed to optimize the location of UPFC in power system. The proposed hybrid PSO algorithm has solved the formulated multiobjective optimization problem. This paper, five objective function to be considered in the form of minimization such as the fast voltage...

A fuzzy logic- (FL-) based control technique for unified power flow controller (UPFC) to resolve the quality issues in transmission network is presented this paper. MATLAB/Simulink used design FL-based controllers shunt and series converters of UPFC, which validated on 4-bus system. In addition, performance suggested UPFC compared with PI (proportional integral), HC (hysteresis controller), MPC...

With the sharp increase in fluctuant sources power systems, deterministic flow (DPF) calculation has been unable to meet demands of practical applications; thus, probabilistic method becomes indispensable for reliable and stable operation systems. This paper adopts (PPF) method, which is a Monte Carlo simulation (MCS) based on Latin hypercube sampling (LHS) analyze uncertainties Specifically, a...

<span lang="EN-GB">The doubly-fed induction generator (DFIG) based wind farm is widely used for extracting energy from the wind. When connected to grid, generally it causes some perturbations. It can disturb function of grid and installations grid. This impact concerns load flow, voltage drops, frequency fluctuations. To overcome those issues, unified power flow controller (UPFC) recommen...

Abstract To mitigate the impacts of voltage sag, a hybrid power flow controller (HPFC) finds spot between sending and receiving terminals. This research work deals with comparison four bus systems employing UPFC HPFC. Simulation is done for 4 system using The outcomes are associated respect to voltage, active Reactive power. exemplifies grander enactment HPFC controlled compared system.