Metallic grounding materials used in power systems nowadays face a number of certain long-standing problems

including corrosion

the difficulty in transportation and construction in complex terrain

low joint degree to soil

frequent theft and destruction

accelerated corrosion induced by resistance-reducing agents

and so on. Hence

we proposed a new type of grounding material

flexible graphite composite grounding material

which has a Litz hierarchical structure and is made of flake graphite of high purity mainly. We tested the material with various kinds of tests

including resistivity and splicing resistance measurement

high/low-temperature tolerance tests

mechanical performance tests

and electrical grounding tests in several typical gr

ounding grids. The test results indicate that the graphite composite ground material has resistivity less than 10

-5

?·m

and stable resistance at contact points around 2 m? under standard lightning current impulses

oscillation impact currents

and short-circuit current impulses. According to the high（200 ℃） and low（-40℃） temperature tolerance tests

the material and its contact point are stable

and the resistivity of the material shows a negative response to temperature variation. Bending

torsion and tensile tests prove that the mechanical performance of the grounding material satisfies application requirements. Simulative power-frequency and impulse grounding tests have further verified the feasibility of using the proposed grounding material match in practical cases.