Abstract
Three electrode method is a common method in measuring tower grounding resistance. However, its wiring distance is too long to complete accurate measurement in some terrain narrow areas, which is also an application problem to be solved urgently in the field of tower grounding resistance measurement. The traditional three electrode method is to find the compensation point between the grounding pole and the current pole. After calculation, there are also compensation points near the current pole besides the grounding pole and the current pole by using the traditional three electrode method. Based on this principle, the current pole is arranged between the grounding pole and the voltage pole by the current pole inner distribution method, which can greatly shorten the distance of the distribution pole. Through simulation analysis and test verification, the pole inner distribution method can control the pole distribution distance around 50m on the basis of ensuring the accuracy of the measurement results. Compared with the three-pole method, the pole distribution distance is shortened to 60%.
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