Protruding Ceramic Substrates for High-Voltage Packaging of Wide-Bandgap Semiconductors

2018-08-09T17:45:09+00:00September 13th, 2017|Power Electronics & Converters, Publications|

With the development of wide bandgap semiconductors, voltage ratings of 10kV and more become realistic. As a consequence, it is now mandatory to propose a suitable packaging. Ceramic-metal substrates are an established technology for voltages up to 3.3kV, but they exhibit some weaknesses for higher voltages.

A multi-vendor protection strategy for HVDC grids based on low-speed DC circuit breakers

2018-08-09T17:45:32+00:00September 13th, 2017|Publications, Supergrid Architecture & Systems|

A protection strategy for Multi-terminal HVDC (MTDC) grids based on AC/DC converters without fault handling capability such as half-bridge MMC converters is presented in this paper. The key components of the proposed strategy consist of DC breakers located at each converter station DC side and at each transmission line (overhead line or cable) end, all of them based on low-speed mechanical DC breaker technology with no fault current limiting devices.

Modelling of a VSC-Based Multi-Terminal HVDC Network for Dynamic Stability Analysis

2018-08-09T17:45:33+00:00September 13th, 2017|Publications, Supergrid Architecture & Systems|

Self-commuted Voltage Source Converter (VSC) can significantly extend the flexibility and operability of HVDC system and be used to implement the concept of Multi-Terminal HVDC (MTDC) grid. In order to take full advantage of MTDC systems, its overall behavior must be characterized in quasi static and dynamic states.

A Novel Modular Multilevel Converter Modelling Technique Based on Semi-Analytical Models

2018-08-09T17:45:34+00:00September 13th, 2017|Publications, Supergrid Architecture & Systems|

In this work, a novel dynamic models for MMC is proposed. The proposed models are intended to simplify modeling challenges related to the high number of switching elements in the MMC. The models can be easily used to simulate the converter for stability analysis or protection algorithms for HVDC grids.