The effectiveness and reliability of the unified power flow controller (UPFC) are determined by insulated gate bipolar transistor (IGBT) valve. Thermal losses, conduction switching losses in IGBT valve all affect efficiency UPFC. failure rate converter valves is influenced junction temperature, which has an impact on converter's reliability. Piecewise linear electrical circuit simulation (PLECS...

The series and shunt control scheme of unified power flow controller (UPFC) impacts the performance stability system during swing. UPFC is most versatile voltage source converter device as it can real reactive transmission simultaneously or selectively. When any subjected to disturbance fault, there are many challenges in damping oscillation using conventional methods. This paper presents neura...

In this paper, we present a new method to determine the optimal location and parameter settings of UnifiedPower Flow Controller (UPFC) for removing voltage violations and transmission lines overloading. UPFC isconsidered as the most powerful member of the FACTS devices, that it can control shunt and series power flow.This option gives to UPFC the power to control the voltage profile and transmi...

Today’s changing electric power systems create a growing need for flexibility, reliability, fast response and accuracy in the fields of electric power generation, transmission, distribution and consumption. Power system networks are complex systems that are nonlinear, disturbances and faults. It can be accomplished by improving the voltage profile, enhancement of voltage stability and by reduci...

in this paper, the unified power flow controller (upfc) is enhanced with a chaotic particle swarm optimization (cpso) damping controller in order to mitigate the low frequency oscillations (lfo) in a single machine infinite bus (smib) power system. the designed damping controller is an optimized lead-lag controller, which extracts the speed deviation of the generator rotor and generates the out...

Main contribution of this work is improving transient stability by installing Flexible AC Transmission System (FACTS) in power systems. For do this, Unified Power Flow Controller (UPFC) has been selected. Also a novel structure has been suggested to improve classic Harmony Search algorithm and suggested improved Harmony Search (iHS) algorithm. This algorithm has been used to obtain UPFC paramet...

<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...

Recent trends in power systems are mostly undergoing research in the area of widespread failures. With the increase in power demand, operation and planning of large interconnected power system are becoming more complex, so power system will become less secure and stable. Operating environment, conventional planning and operating methods can leave power system exposed to instabilities. Voltage s...