نتایج جستجو برای: elimination of selective harmonics
تعداد نتایج: 21183544 فیلتر نتایج به سال:
This article considers ${l}$ -level cascaded H-bridge (CHB) inverters and proposes a new modulation method based on pulse active width (PAWM), capable to minimize all harmonics with order notation="LaTeX">$n< 2l+1$ satisfy the Euro...
Selective harmonics elimination (SHE) is one of the prominent technique that is used to produce required fundamental voltage of multilevel inverters with elimination of selective harmonic orders. The SHE equations are nonlinear equations and are also termed transcendental equations owing to the fact that these equations contain trigonometric terms. Attempt has been made in previous works to sol...
This paper implements Broyden's Method Assisted Differential Evolution (BMADE) algorithm for eliminating third and fifth harmonics in the output voltage of 7-level cascaded H-Bridge multilevel inverter (CHB-MLI) using selective harmonic elimination technique. Calculations switching angles are done various modulation index values (M). Initial guess method is calculated by (DE). Exact value then ...
Multilevel converters (MLCs) are extensively used in medium- and high-power applications. Currently, MLCs also grid integration of renewable sources energy. In this paper a three-phase 11-level MLC topology is investigated which requires smaller number active switches compared to similar existing topologies for the same levels. order eliminate lower harmonics, selective harmonic elimination (SH...
This paper presents a new method to find the optimum switching angles in voltage source multilevel converters in order to minimize specific higher order harmonics and decrease the total harmonic distortion (THD) of their output voltage waveform. The output voltage waveform of inverter can either be in the form of staircase or PWM. In order to increase the degrees of freedom and elimination of m...
In this paper, we propose a Controlled Inductance Power Filter (CIPF) to solve power quality problems in industrial DC power supply systems. This method is based on the theory of magnetic potential equilibrium combined with active hybrid filter technology. Initially the system structure and filter wiring scheme are presented and the equivalent circuit is performed with the mathematical models o...
<span id="docs-internal-guid-09d7eb9c-7fff-b2fc-ebd1-1a60862765dc"><span>Selective Harmonic elimination has emerged as an in-depth research method to replace traditional PWM technology. This study demonstrates the selective harmonic by using a hybrid Genetic algorithm GA and local search (GA-LS) of uniform asymmetric multilevel inverter called USAMI That removes higher-order harmoni...
Considering present shortage of fossil fuels and discharges ozone harming substances, power developed from Renewable Energy Sources (RES) is identified as the excellent choice for producing electricity. The characteristic an inverter to transform dc into ac fulfill out requirements load. Despite its advantage, presence harmonics in output voltage reduces both efficiency performance inverter. Se...
in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...
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