Control of high-voltage, direct current systems
AssigneeGeneral Electric Technology GmbH
InventorsAntonios TZIMAS, Guillaume LUCAS, Kevin Dyke
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Abstract
The present invention provides methods and apparatus for controlling HVDC power transmission systems so as to increase the effective lifetime of cables carrying the DC power (and particularly the extruded polymer insulation of those cables). The method includes entering a maintenance mode in which the electrical properties applied to the cable are varied so as to facilitate diffusion of space charge accumulation in the extruded polymer insulation.
Claims16
A method of operating a high-voltage direct-current (HVDC) system, the HVDC system comprising at least one DC link, at least part of the DC link comprising a cable with extruded polymer insulation, the DC link being operable in a maintenance mode and at least one other mode of operation, the method comprising:
- entering the maintenance mode, in which the electrical properties applied to the cable are varied so as to facilitate diffusion of space charge accumulation in the extruded polymer insulation.
A control system for a high-voltage, direct-current (HVDC) system, the HVDC system comprising at least one DC link, at least part of the DC link comprising a cable with extruded polymer insulation, the DC link being operable in a maintenance mode and at least one other mode of operation, the control system being configured to:
- control the DC link to enter the maintenance mode, in which the electrical properties applied to the cable are varied so as to induce heating in the cable and facilitate diffusion of space charge accumulation in the extruded polymer insulation.
Dependencies are inferred from the claim text.