Assessment of protection strategy options for future DC grids
This paper proposes a set of measurable Key Performance Indicators (KPI) that demonstrates how effective a protection strategy is achieving key objectives.
Dynamic control of embedded HVDC to contribute to transient stability enhancement
This paper aims to investigate the impact of the overlaid HVDC systems on stability of the surrounding AC grid.
Transient-based fault identification algorithm using parametric models for meshed HVDC grids
This paper addresses the problem of fault identification in meshed HVDC grids once an abnormal behavior has been detected.
Unlocking HVDC interoperability: register for our free webinar!
In this webinar, we will share our technical analysis of HVDC interoperability and present possible directions we can take moving forward.
Fault identification in HVDC grids using a transient parametric model
This paper presents a novel single-ended fault identification algorithm for meshed High Voltage Direct Current grids.
ISGAN publishes its discussion paper on micro vs. mega trends for electrical grids
The International Smart Grid Action Network (ISGAN) has recently published its discussion paper “micro vs MEGA: trends influencing the development of the power system”, with the contribution of SuperGrid Institute experts.
ISGAN publishes its discussion paper on micro vs. mega trends for electrical grids
The International Smart Grid Action Network (ISGAN) has recently published its discussion paper “micro vs MEGA: trends influencing the development of the power system”, with the contribution of SuperGrid Institute experts.
Compliance of a cable-based protection strategy for OHL grids: Analysis and remediation
This paper points out the challenges to overcome when applying a protection strategy based on a non-selective fault clearing philosophy without DC reactors to an overhead line based multi-terminal DC grid.
A novel single-ended fault identification algorithm for full selective protection strategy
We propose a parametric single-ended fault identification algorithm to be used in full selective protection strategy.
Phd Ragavendran RAMACHANDRAN “Control and Power Management of an Offshore Wind Power Plant with a Diode Rectifier based HVDC Transmission”
Energy Transition for a more sustainable world is now the priority in societies. Towards this objective, especially in Europe, the offshore wind energy development has been relatively rapid. For Offshore Wind Power Plants (OWPP) farther from the shore (50 km and beyond) Voltage Source Converter (VSC) based High Voltage DC (HVDC) Transmission has become the prominent solution. Replacement of the offshore VSC station by multiple Diode Rectifier Units (DRUs) led to a cheaper, more compact and robust solution. This thesis focusses on various technological and scientific problems involved in the control system of the Offshore Wind power Plant with Diode Rectifier (DR) based HVDC transmission. These challenges are first reviewed in detail along with the state of the art. Then, based on the system dynamics, a grid forming control scheme is proposed by using the P-V and Q-f droop relationships, with a solution for the synchronization of the wind generators. Moreover, some of the selected control solutions in the literature for this topology are reviewed, compared and assessed by using time domain simulations of a study case. Following this, the different solutions for black start of the offshore AC system are analyzed from the available literature and they are compared using the relevant qualitative criteria. The various faults in the offshore system are then analyzed and the above designed grid forming control scheme is extended with Fault Ride through (FRT) capability, for offshore AC grid faults. Finally, a brief analysis is done on the challenges for the integration of this OWPP topology into a Multi Terminal DC (MTDC) network.
