Review of HVDC systems for enhancing resilience after extreme natural events

Abstract

Compared with AC systems, HVDC systems are more flexible and potentially contribute to enhancing system resilience. Currently, three types of HVDC technologies, LCC-HVDC (Line-commutated Current-sourced Converters, LCC), VSC-HVDC (Voltage Sourced Converter, VSC), and MMC-HVDC (Modular-Multilevel-Converter, MMC), are applied in practical projects. All types of HVDC systems can be applied to stabilize the system frequency of AC power systems and facilitate system recovery after extreme natural events. The operation characteristics, methods, and control strategies of different HVDC technologies for facilitating system operation are reviewed herein; it is indicated that HVDC technology is an effective solution for enhancing system resilience. Renewable resources, energy storage systems, and demand response devices can be coordinated well with HVDC systems. The frequency and voltage regulation ability of power systems and the black start ability can be enhanced by introducing HVDC systems into power systems. Several isolated AC power systems can be connected to HVDC systems. These AC systems can interact with other AC systems through HVDC systems by conforming to their operational characteristics and constraints. The resilience of these AC systems can be enhanced by these interactions. Additionally, related operation methods and control strategies will also be reviewed. JEL CLASSIFICATION Power electronics, electric power applicationsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Benefits of Multi-Terminal HVdc Under Extreme Conditions via Production Cost Modeling Analyses

“…This work, however, only focuses on transient stability analysis. In [26], a discussion on how distributed generation resources, energy storages, and demand response can be coordinated through HVdc transmission to provide cross-regional frequency regulation for reducing fluctuations in frequency and improving the stability of large interconnected grids. The authors also discuss on the capability of using HVdc transmission to perform blackstart and restore the power system in an area that is affected by a natural disaster.…”