INFLUENCE OF ARRANGEMENT OF ELECTRODES ON GROUNDING RESISTANCE MEASUREMENT OF SUBSTATION IN VERTICAL LAYERED SOIL
Rong Zeng · Power System Technology · 2000
Accurate measurement of grounding resistance of substation is a basic guarantee to ensure the secure operation of power system. The arrangement rules of measuring electrodes, which are used to measure the grounding resistance of grounding system in vertical layered soil, are analyzed by numerical calculation method in this paper. When the grounding system is arranged in different site the demanded correct sites for potential poles under different directions are analyzed. The analysis shows that for the measurement of grounding resistance of substation a more scientific and suitable measuring method is to choose rational direction of lead wire of current poles and the arrangement site of voltage poles after knowing the structure of soil near the grounding system. Thus, not only the more accurate measured results could be obtained, but also the deviation between the measured results and real grounding resistance could be known fairly well.