Authors:
Yuhe Zhang
1
and
Hao Zhang
2
Affiliations:
1
Chengdu University of Technology, Chengdu, China
;
2
Chengdu Onise Electronic Technology, Co., Ltd, Chengdu, China
Keyword(s):
Measuring Device, High-Frequency Pulses, Impact Ground Impedance.
Abstract:
In recent years, many substations have expanded accidents due to lightning strikes, most of which are related to unqualified grounding resistance of the ground grid, so vigorously strengthening the regular monitoring of the ground resistance of the ground grid has become an important task. At present, the common use of high and low voltage and low frequency AC, high voltage low and high frequency AC, high and low voltage variable frequency AC, high and low voltage DC, etc. flows through the measured body, testing the ground resistance, impedance, the AC or DC used, the frequency is single, and the rising and falling edges are slow, and the ground impedance is inductive impedance, capacitive impedance or pure resistance impedance can not be well reflected. In order to solve the above problems, a grounding resistance test method based on low-voltage high-frequency pulse voltage is proposed.