AC railway traction loads are usually huge single phase loads. As a result, a significant amount of Negative Sequence Current (NSC) is injected into utility grid. Moreover, harmonics and consumption ofreactive power are further power quality problems that the supply network is encountering. In this paper, acompensation strategy with the aid of Railway Power Conditioner (RPC) is proposed to over...

Brucella melitensis, as a pathogenic gram-negative intracellular bacterium, causes brucellosis in animals and humans. According to literature, the B. melitensis outer membrane protein 31 (Omp31) is considered as an important vaccine candidate against brucellosis. The aim of the current study was to compare three different expression constructs containing B. melitensis Omp31 antigen using bioinf...

We propose a modular multilevel converter (MMC) based three-phase four-wire (3P4W) split capacitor distribution static synchronous compensator (DSTATCOM), aiming at compensating unbalanced and reactive load currents. Due to the zero-sequence current compensation, circulating characteristics of 3P4W MMC-DSTATCOM are different from conventional MMCs. Moreover, distinct working principle MMC would...

This paper is based on the EL mathematical model of the MMC synchronous rotating coordinate system, derived the MMC passive control law, the inner ring current passive controller is designed and the AC voltage controller is set. In order to restrain the negative sequence current caused by the network voltage unbalance or asymmetric AC system fault, the positive and negative sequence of independ...

When students are tested, delaying feedback of the correct answer by a few seconds is more beneficial than providing it immediately (e.g., Brackbill & Kappy, 1962). The current study refers to this effect as the delay-of-feedback benefit. Little is known about the theoretical nature of the delay-of-feedback benefit. The current study investigated the hypothesis that a delay of feedback is benef...

In a balanced three phase system, only harmonics of positive sequence(7 th , 13 th ,..etc) and negative sequence (5 th , 11 th ,…etc) are produced. However, the harmonic currents produced by single phase non-linear loads like switch-mode power supplies in computer which are connected between phase to neutral injects third order zero sequence harmonics (3 rd ,9 th ,15 th …etc) (Mehmet et al 2008...