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Advantages of Phasor and Vector Oriented Testing in Substation Grounding Safety

机译：变电站接地安全相比量和向量导向测试的优点

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摘要

Current injection techniques used for testing grounding systems have evolved over the past two decades. They promoted the development of some test equipment that is capable of measuring the magnitudes and angles between injected current and split network currents, and between injected current and the network resulting voltages. Traditional test methods for ground grids found in standards such as IEEE 81-2012 need refreshing. These methods haven't changed in a long time and they follow a scalar based approach. Phasor-based methods for current injection help to assess the grounding systems and soils in a more natural state of operation. This paper compares scalar oriented testing vs phasor and vector oriented testing for analysis of substation ground grids. Benefits and disadvantages are listed for both approaches for the following tests: four pin (soil resistivity), three pin (ground grid resistance), fall of potential, current split, and touch and step voltage tests.
机译：用于测试接地系统的当前注射技术在过去二十年中已经发展出来。它们促进了一些测试设备的开发，该测试设备能够在注入的电流和分开网络电流之间以及注入电流与导致电压之间之间的幅度和角度。在IEEE 81-2012等标准中发现的地面网格的传统测试方法需要刷新。这些方法在很长一段时间内没有改变，并遵循基于标量的方法。基于Phasor的当前注射方法有助于评估更自然的操作状态下的接地系统和土壤。本文将标量定向测试与分析和向量导向测试进行了比较，以分析变电站接地网格。对于以下测试的两种方法列出了益处和缺点：四个引脚（土壤电阻率），三个引脚（接地电阻），潜在，电流分裂和触摸和踩电压测试。

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