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The active-forced-commutated (AFC) bridge for high-voltage (HV) DC transmission has recently been proposed, which operates low-loss thyristor valves in the manner of a voltage source converter (VSC) with the assistance of a self-commutated full-bridge (FB) chain-link (CL) circuit, creating a hybrid VSC solution which retains the key advantage of high-efficiency performance found in conventional line-commutated-converters...
This paper put a light on an improved current control strategy which is the combination of fuzzy interface with the vector-pi controller and is applied to a non-linear load. The supply current is forced to make sinusoidal by in-direct current control strategy. In order to make the overall system cost-effective a hybrid filter which is the combination of active and passive filter is used. It is found...
This paper describes the application of neural network and fuzzy logic based artificial intelligence techniques for the controller design for three-phase three-level shunt active power filter. The fuzzy logic based controllers are used for the regulation of dc voltage and current harmonic cancellation. The neural network is used for obtaining harmonics from non-linear load current. The instantaneous...
This paper presents a novel idea to show the ability to benefit of the harmonic currents which are produced on the load side of the power grid. The proposed circuit contributes in reduction of the Total Harmonic Distortion (THD) percentage through adding a High Pass Filter (HPF) in order to draw harmonic currents (in 150 Hz and multiple frequencies) and convert them to Direct Current (DC) (zero frequency)...
Several studies have been presented regarding the harmonics mitigation by using different types of filters. Passive filter is one of them and is employed due to his simplicity, economical cost and high reliability in power system. This paper presents an analysis and study of three types of passive filters to minimize harmonics distortion caused by non linear loads in standalone PV system. In order...
With the recent development in the power electronic devices, the use of power electronics in controlled Variable Speed Drives (VSD) is increasing in industrial and domestic applications. These controlled VSDs provide many advantages and flexibility in those applications, but at same time cause harmonic distortion in the power system. In recent years, significant attention has been focused on line...
In this paper, the development of a practical parallel hybrid power filter consisting of a shunt active power filter and passive filters is presented. This work explores design and analysis of Hybrid Active Power Filter (HAPF) based in p-q instantaneous theory and using hysteresis current band to obtain the gating signals for five-level diode clamped multilevel inverter (DCMLI). The technique used...
The hybrid approach of active and passive filter combination is used to eliminate the harmonics in non-linear load is presented in this paper. The objective of the proposed work is to mainly concentrate on reduction of load current harmonics and power factor improvement. The active filter is used to eliminate low order high amplitude harmonics, which is not an economic solution. Even though the passive...
Hybrid active power filter are used for eliminating harmonics in the power system. This paper deals with the hybrid active power filter for non-linear load along with its control scheme. In a hybrid active power filter, the active part is used to filter out the higher order harmonics, while lower order harmonics are eliminated by passive filter tuned for 5th and 7th order harmonic frequencies. The...
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