Geomagnetically induced currents: A measurement based inverse determination of earth impedances

P. Schachinger, Dennis Albert, H. Renner
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引用次数: 2

Abstract

Geomagnetically induced currents (GIC) can lead to serious disturbances in transmission grids. Arising problems range from high noise levels and reactive power consumption of transformers up to transformer outages and regional blackouts. To mitigate GICs effectively, simulation is an important aspect. However, incomplete electrical grid data in combination with discrete earth layer models lead to differences between measurement and simulation. In this article, we describe an inverse calculation method of the complex earth impedance, based on transformer neutral point measurements. We show that the resulting model leads to higher simulation accuracy. This calculation method may be used especially when earth layer data is missing or inaccurate.
地磁感应电流:一种基于地球阻抗逆测定的测量方法
地磁感应电流会对输电网造成严重的干扰。出现的问题包括高噪音和变压器的无功功率消耗,直至变压器停电和区域停电。为了有效地缓解gic,仿真是一个重要方面。然而,不完整的电网数据与离散的地球层模型相结合,导致测量与模拟之间存在差异。本文介绍了一种基于变压器中性点测量的复地阻抗逆计算方法。结果表明,该模型具有较高的仿真精度。这种计算方法尤其适用于地层资料缺失或不准确的情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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