HVDC technology has undergone many major developments in the past decades,resulting in higher power ratings,increased efficiency,and the availability of effective means for HVDC grid protection.These developments have...HVDC technology has undergone many major developments in the past decades,resulting in higher power ratings,increased efficiency,and the availability of effective means for HVDC grid protection.These developments have made overlay HVDC grids a viable option to shift towards a carbon-free power system,by enabling optimal use of renewable resources.In particular,overlay HVDC grids greatly increase the prospect of building(trans-)continental supergrids to facilitate global economic development.However,overlay HVDC grids still encounter challenges due to the distance and amount of power involved.This paper focuses on analyzing the readiness of the current technologies and the challenges associated with overlay HVDC grids.An in-depth analysis is carried out to evaluate the applicability of current technologies for overlay HVDC grids.Based on the review of recent research and development efforts,the gaps and challenges towards the realization of a global HVDC grid are summarized.展开更多
This study presents the initialisation of a hybrid alternating current/direct current(AC/DC)power system to determine the operation point around which the system is linearised as a starting point for an electromagneti...This study presents the initialisation of a hybrid alternating current/direct current(AC/DC)power system to determine the operation point around which the system is linearised as a starting point for an electromagnetic or harmonic stability analysis.To this end,each AC or DC power system component is modelled in the Fourier transform domain and further adjusted to a simplified representation compatible with a power flow formulation.The study also presents how voltage source converter(VSC)high-voltage DC-based systems can be analysed when the different VSC controls are applied.The result of the power flow solution is then used for the power converters’initialisation.展开更多
基金supported in part by the Science and Technology Project of State Grid Corporation of China(HVDC Systems/Grids for Transnational Interconnections)under Grant No.SGTYHT/16-JS-198。
文摘HVDC technology has undergone many major developments in the past decades,resulting in higher power ratings,increased efficiency,and the availability of effective means for HVDC grid protection.These developments have made overlay HVDC grids a viable option to shift towards a carbon-free power system,by enabling optimal use of renewable resources.In particular,overlay HVDC grids greatly increase the prospect of building(trans-)continental supergrids to facilitate global economic development.However,overlay HVDC grids still encounter challenges due to the distance and amount of power involved.This paper focuses on analyzing the readiness of the current technologies and the challenges associated with overlay HVDC grids.An in-depth analysis is carried out to evaluate the applicability of current technologies for overlay HVDC grids.Based on the review of recent research and development efforts,the gaps and challenges towards the realization of a global HVDC grid are summarized.
基金supported by the Energy Transition Fund,FOD Economy,Belgium.This work was supported by the Research Foundation Flanders(FWO)under grant no.G0D2319N.The research of J.Beerten was funded by the FWO under grant no.12D1117N.
文摘This study presents the initialisation of a hybrid alternating current/direct current(AC/DC)power system to determine the operation point around which the system is linearised as a starting point for an electromagnetic or harmonic stability analysis.To this end,each AC or DC power system component is modelled in the Fourier transform domain and further adjusted to a simplified representation compatible with a power flow formulation.The study also presents how voltage source converter(VSC)high-voltage DC-based systems can be analysed when the different VSC controls are applied.The result of the power flow solution is then used for the power converters’initialisation.
