论文标题
通过数值方法在功率网格中的饱和核心故障电流限制器的不同配置的比较
Comparison of Different Configurations of Saturated Core Fault Current Limiters in a Power Grid by Numerical Method
论文作者
论文摘要
由于对电力的需求不断增长和电力系统中的高复杂性，短路断层电流正在增加。由于故障电流达到断路器无法限制的最高值，因此电网安全性受到危险。通过将限制阻抗进入串联的传输线，这些阻抗将故障电流的上升量限制为可接受的水平。饱和核心故障电流限制器（SCFCL）是限制具有良好性能特征的功率网络中断层电流的关键工具。在正常情况下，这些限制器对系统有轻微的影响，并且在发生时可以有效地限制短路电流。在本章中，介绍了具有不同排列的AC绕组和DC绕组的SCFCL的各种结构，并评估并比较了正常和错误的系统条件下经过FCL的电流。还研究了核心各个区域中各个区域的通量密度，并且已经进行了所需的分析。模拟将基于Comsol Multiphysics 5.4（一种有限的元素软件包，可以提供宝贵的评估，以将这些保护设备与不同的配置进行比较。
Short circuit fault currents are increasing due to growing demand for electricity and high complexity in power systems. Because the fault currents reach the highest value which the breakers are unable to restrict, the electrical grid security is under jeopardy. By entering a limiting impedance into a transmission line in series, these impedances restrict the rising amounts of fault currents to levels that are acceptable. Saturated core fault current limiters (SCFCLs) are a pivotal tool for limiting fault currents rise in power networks that have good performance characteristics. In a normal condition, these limiters have slight effects on the system and can effectively limit short circuit currents when occur. In this chapter, various structures of SCFCLs with different arrangements of ac windings & dc windings are presented and the currents passing through the FCLs under the normal and faulty system conditions are assessed and compared. The flux density in various regions of the core in different arrangements has been investigated as well and the desired analyzes have been performed. Simulation will be presented based on COMSOL Multiphysics 5.4, a finite element software package which can provide a precious assessment to compare these protective devices with different configurations.
