This study presents a modified transient current limiter (MTCL) for mitigation the inrush current of transformers. The MTCL is based on conventional transient current limiter (TCL), which, its configuration is modified to overcome the TCL drawbacks of operation. The proposed MTCL offers lower power losses and voltage/current THD during normal operation mode. It needs only one limiting reactor i...

The paper is focused on the comparison of the reverse flow reactor (RFR) and of the counter-current reactor (CCR) operation, focusing the attention on the interaction between transport phenomena and chemical reactions, as well as on the analysis of the dynamic behavior. A heterogeneous mathematical model was used in order to investigate the performance of both reactor configurations. The role o...

With the rapid development of DC power grids, protection grids is particularly important. Therefore, this paper proposes a kind fault current-limiter with instantaneous by-pass current-limiting reactance, analyses its working principle and theoretical calculations, verifies correctness through simulation experiments. At same time, experimental results show that proposed in can not only instanta...

In this paper, short circuit analysis, based on the electromagnetic transient program (EMTP), has been used to investigate the behavior of the DC reactor type FCL installed in an electrical distribution grid. System studies show that the DC reactor type FCL can not only limit the fault current to an acceptable value, but also can mitigate the voltage sag. A DC reactor type fault current limiter...

A recent trial of natural language call steering on live UK calls to the operator is described along with its results. The characteristics of the problem are described along with the acoustic, language, semantic and dialogue modelling approaches employed. Natural language call steering is found to be viable, with recognition and semantic accuracy the current limiting factors.

We consider a one-dimensional, transient random walk in a random i.i.d. environment. The asymptotic behaviour of such random walk depends to a large extent on a crucial parameter κ > 0 that determines the fluctuations of the process. When 0 < κ < 2, the averaged distributions of the hitting times of the random walk converge to a κ-stable distribution. However, it was shown recently that in this...

Abstract In order to limit the temporary overvoltage, method of series current limiting reactor in line is often used power grid overvoltage. The parameters reactance directly affect level 50Hz installation a changes positive and zero sequence impedance line, which has an impact on overvoltage line. Installing 500 kV Line’s studied by using electromagnetic transient calculation software EMTP. s...

Current-limiting reactors are widely used in industrial electrical grids to reduce the current amplitude equipment and stabilize voltage on busbar during short circuits. Their application is distinguished by high technical economic efficiency. However, mechanical damage has been observed within extensive with many induction motors internal synchronous generators. The article analyses a case stu...