Multilevel voltage source inverters have several advantages compare to traditional voltage source inverter. These inverters reduce cost, get better voltage waveform and decrease Total Harmonic Distortion (THD) by increasing the levels of output voltage. In this paper Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) methods are used to find the switching angles for achieving to the m...

This paper presents a fuzzy logic, PI controlled shunt active power filter used to compensate for harmonic distortion in three-phase systems. The Hybrid active power filter employs a simple method for the calculation of the reference compensation current based on Fast Fourier Transform. The presented Hybrid Active Power filter is able to operate in balanced, load conditions. Classic filters may...

This paper proposed a new topology of symmetric single-phase multilevel inverter with the smaller number semiconductor switches and optimized low-frequency control methods to optimize Total Harmonic Distortion. A nine-level single phase output is obtained by eight active switches, four diodes capacitors from two asymmetrical dc sources. The selected harmonic order in voltage eliminated PWM (SHE...

Consolidation of shunt capacitors plays an important role in radial distribution networks. Among many of their merits, line loss and total harmonic distortion (THD) reduction, voltage profile improvement and reactive power compensation can be the salient specifications of shunt capacitors. Studies show that non-optimal locations shunt capacitor units lead to increase loss, together with bad eff...

In this paper presents a fast new PI controlled DSTATCOM used to compensate for harmonic distortion in threephase system. The DSTATCOM employs a simple Method for the calculation of the reference compensation current based. The presented DSTATCOM is able to operate in balanced, unbalanced and Variable load conditions. Classic filters may not have satisfactory performance in fast varying conditi...

Since 1965, thalidomide (Thd) has shown dramatic efficacy in alleviating the signs and symptoms of erythema nodosum leprosum (ENL). Despite its well-known teratogenic effects, it is the treatment of choice for acute ENL, with recommended oral doses up to 400 mg daily. The mechanism(s) by which Thd causes deformities in embryos and attenuates ENL, a major cause of morbidity in lepromatous lepros...