SuperGrid Institute’s has a significant presence at Jicable19

2019-07-04T11:01:26+00:00June 28th, 2019|Event, HVDC Cable Systems|

Jicable is an international forum relating to insulated power cables and accessories, ranging from low voltage and special cables to ultra-high voltage cables and new technologies. The forum provides the perfect environment to exchange information on progress in research, industrial development, cable installation, operation & diagnoses. SuperGrid Institute was highly involved in this 10th edition of the conference, with 4 presentations and 1 participation as a “rapporteur”.

SuperGrid Institute’s participation at AGP21

2019-07-09T17:23:05+00:00June 27th, 2019|All, Conference, Event|

The Association Grand Projects 21 – Major Programmes and Projects for the 21st Century (AGP21) met this Thursday in Versailles to discuss the development of interconnected electricity networks on a global scale. SuperGrid Institute was invited to present its vision and discuss the appeal of multi-terminal HVDC technologies in the design and construction of future energy highways. The subsea node concept developed at SuperGrid Institute was also introduced as an essential building block for extending offshore networks and integrating renewable energies on a wide-scale.

LISORE consortium plenary meeting at SuperGrid Institute

2019-07-10T10:47:11+00:00June 26th, 2019|All, Event|

SuperGrid Institute was pleased to host the LISORE consortium plenary meeting this Wednesday. This 15-month project that began in January 2019 aims to explore the feasibility and develop a technological roadmap from which innovative low-cost substations can be developed, thereby enabling the integration of marine energies by 2025. By participating and organising this day, SuperGrid Institute has increased its visibility and positioned itself as an expert partner in the domain of innovative electrical systems. The visit of our test platforms enabled us to demonstrate to the project participants how we are supporting the development of the sector through our expertise and state of the art facilities.

Follow up of space charge distributions in HVDC cable during a Pre-Qualification test using the Pulse ElectroAcoustic technique and the Thermal Step Method

2019-06-24T14:38:55+00:00June 26th, 2019|HVDC Cable Systems, Publications|

In order to better understand the evolution of space charge and electric field distortions during the application of electro-thermal stresses to a HVDC cable system, the present paper shows the follow up of periodic space charge characterizations on a HVDC cable during part of a Pre-Qualification test using both the Pulse ElectroAcoustic technique and the Thermal Step Method. The focus is on the evolution of space charges distributions during load cycles and high load sequences according to the Cigré TB496 recommendation.

Pole-to-ground fault protection strategy for HVDC grids under symmetrical monopolar configuration

2019-06-24T13:54:30+00:00June 25th, 2019|Publications, Supergrid Architecture & Systems|

This paper proposes a novel pole-to-ground fault protection strategy for HVDC grids under symmetrical monopolar configuration employing low-speed DC breakers and pole rebalancing reactor (PRR) located at AC side to manage the rebalancing of the pole voltages. The first part of the paper is dedicated to the detailed description of the primary and backup protection sequences. In the second part, the proposed concept is validated through EMT simulations performed on a 4-terminal HVDC grid.

Effect of the Surge Arrester Configuration in MMC-HVDC Systems under DC and Converter Fault Conditions

2019-06-18T08:58:58+00:00June 18th, 2019|Publications, Supergrid Architecture & Systems|

Different surge arrester configurations are studied for a modular multilevel converter (MMC) in a symmetrical monopole configuration. Each configuration is analyzed under fault conditions including DC side faults and faults inside the converter station. The configurations considered are compared in terms of overvoltages, current levels and energy dissipation. It is found that the selection of the surge arrester parameters does not only depend on the overvoltage levels of the equipment, but also on the surge arrester configuration considered. The action of the surge arresters could result in higher longitudinal withstand voltage requirements of the arm reactors. Furthermore, special attention shall also be given to the possible low inductance loops created by the conduction of the arresters during a transient event.