## 6 Conclusions  
In this paper, a systematic yet brief presentation of the proposed analytical method for calculating the electric field gradient, ground potential rise, and resistance to remote earth of electrode stations [2] was initially made, where, for the near-electric field, a linear current source was used for each electrode, which extended cylindrically over a zone of constant sea/land or dam thickness, while for the far-field, the corresponding mathematical background of a point current source was used, in the form of a suitable wedge of sea on land (extension of [1,27]). In the case of more electrodes than one, the application of the method was extended through superposition [2]. Then, for the first time, the geometry was analysed for the following electrode station configurations, against the basic configuration of straight frames in a row, parallel on the longitudinal axis of the protective dam (first configuration) [1, 2, 5, 6, 7, 8, 9, 10]:  
* Straight frames in a row, each placed vertically on the longitudinal axis of the dam (second configuration);
* Straight frames in two overlapping rows, each parallel to the longitudinal axis of the dam and aligned with each other (third configuration);
* Straight frames in two overlapping rows, each parallel to the longitudinal axis, but non-overlapping on the vertical axis of the dam (fourth configuration);
* Straight frames in two successive rows, each vertical to the longitudinal axis of the dam and aligned with each other (fifth configuration);
* Straight frames in two successive rows, each vertical to the longitudinal axis of the dam and non-overlapping on the vertical one (sixth configuration);
* Straight frames in perimetrical placement to the protective dam, adapting to the outline of the pond under construction (seventh configuration);
* Straight frames adapted to a T-shaped protective dam (to increase the inner outline of the dam) (eighth configuration);
* Straight frames adapted radially to a central base with guides, in open sea (ninth configuration);
* Straight frames adapted perimetrically to a central base, in open sea (10 th configuration). Configurations 2 to 8 could be characterised as variations in the basic configuration, with the other two (9 and 10) as new forms, due to their placement around a central base, in the open sea. For each configuration, the particularities they present (in terms of the suspension-lifting system) and the requirements they have (in terms of dam construction works, pond dredging, embankment, quay wall formation, etc.) were recorded. Subsequently, however, the aforementioned methodology for calculating the electric field gradient, ground potential rise, and resistance to remote earth of electrode stations [2] wasapplied to the new proposed configurations, for the cases of the electrode stations in Stathoroti and Korakia for the HVDC interconnection of Crete and Attica. From the respective field results, it first emerged that the field study of a single frame, with a linear arrangement of electrodes, is not sufficient for the study of an electrode station consisting of several frames. On the contrary, the respective recalculation of the field sizes proves necessary. In terms of practical results, from the typical configurations, the smallest required length (in front of the dam) occurs in the case of using straight frames placed around the perimeter of the protective dam, adapted to the outline of the pond being constructed (seventh configuration), while the smallest area of the zone of influence is achieved in the case of using straight frames in two overlapping rows, each perpendicular to the longitudinal axis of the protective dam, aligned with each other (fifth configuration).