小扰动法与并联电阻法选线方式的比较分析

Comparison and Analysis on Line Selection Node of Small Disturbance Method and Shunt Resistance Method

文章介绍了适用于谐振接地系统的四种主要选线原理,对其中应用最广的小扰动法和并联电阻法选线方式从选线原理、选线准确性保障措施、快速与连续选线能力、残流增大量与持续时间、安全性等各方面进行了比较。指出小扰动法选线方式比并联电阻法选线方式在技术上具有显著优势,但只有具备可控快速调节功能的高短路阻抗变压器式消弧线圈才可实现小扰动选线方式,而调匝式消弧线圈只能实现并联电阻法选线。

The paper introduced the 4 kinds of line selection principle that applies to the resonance grounding system, in which the small disturbance method and shunt resistance method were compared from the aspects such as line selection principle, measures for line selection accuracy, fast and successive line selection ability, increase quantity and duration of residual current and safety. It is pointed out that the small disturbance method has notable advantages than shunt resistance method on technology aspect, but only the transformer type arc suppression coil with controllable fast regulation and higher short circuit impedance can realize the line selection with small disturbance method, and the arc suppression coil with turns adjustment can onlv realize the line selection with shunt resistance method.