Talking about the improvement on local ground pole;

Design of grounding electrode feeder system of Three Gorges Longquan Converter Station;

Based on the equivalence of steady current field and static electric field, for the two common forms of horizontal linear grounding electrode and parallel vertical grounding electrode, a new method is presented to calculate the non-uniform of current distribution in two kinds grounding electrode, and the rule of current distribution in grounding electrode is discussed.

In view of the corrosion of underground metal components caused by the grounding electrode of HVDC power transmission project, the features of electro-corrosion are analyzed and the limit values of corrosion to grounding metal components are determined.

The effectivity and merit of slanting grounding electrode on improving grounding grid performance are analyzed in this paper by comparing the effect of all kinds of grounding electrode.

As the design criteria for HVDA ground electrodes is not available in China,it is necessary to summarize timely design experiences both at home and abroad in this respect.

This paper proposes a study of the influence of the HVDC(High Voltage Direct Current transmission) ground electrode current on neutral grounding transformer.

The performance of HVDC ground electrodes is analyzed in detail.

Tentative plan of sharing earth electrodes among converter stations in Guangdong;

Sharing earth electrode by three UHVDC system rectifiers or inverters are studied respectively by electromagnetic transient analysis software EMTP-RV based on the main parameters of ±800kV HVDC project from Xiangjiaba to Nanhui.