| 主权项 |
1. A modular multilevel voltage source converter system comprising high voltage electric equipment to be grounded when not in use and a grounding system, said high voltage electric equipment comprising a modular multilevel voltage source converter having cells with capacitors and a plurality of pairs of positive and negative grounding terminals respectively assigned to the cell capacitors,
said grounding system comprising a rod element interacting with said terminals, whereby said rod element comprises at least one conductive section and at least one isolating section; whereby the grounding system further comprises a rod propulsion system arranged to be remotely controlled and configured to move said rod element along its longitudinal axis from an ungrounded position, in which the positive and negative grounding terminals are isolated from one another by the isolating section, into a grounded position, in which the positive and negative grounding terminals are galvanically connected with one another by the conductive section, and in which grounded position the conductive section is connected to ground via the at least one conductor; whereby the positive and negative grounding terminals each comprise at least one contact element which allows the longitudinal movement of the rod element but still is strong enough to provide electric contact with said conductive section when the rod element is in the grounded position; whereby the respective lengths of the isolating sections, conductive sections and the positive and negative grounding terminals respectively the distance between the two contact elements of the positive and/or negative grounding terminals is chosen so that the electrical interconnection of two consecutive conducting sections is achieved when the movable rod element is in the grounded position, while the electrical isolation of the positive and negative grounding terminals is achieved when the moveable rod element is in the ungrounded position. |
