The goal of DC-GRIDS is to enable the rapid expansion of the grid’s capacity by making HVDC transmission systems cost-comparable with conventional AC technology. This will lead to higher grid resiliency, energy availability, performance, and lower deployment time (if HVDC can use the existing overhead and underground transmission infrastructure rights-of-way). The program will also enable true multi-directional power routing with flexible interconnections between new and existing AC and direct current (DC) lines, making integration of sustainable energy sources faster and easier.
This program will focus on two technical categories:
- Category A: Novel submodules and modular high-voltage power electronic valves; and
- Category B: Technologies that enable highly compact multi-terminal converter stations.
Technological breakthroughs under Category A will enable the availability of low-cost, vendor-agnostic valves that can be plug-and-play-ready and able to flexibly operate together in the same HVDC converter station. This would lead to a competitive economy that will drive down the cost of valves, and consequently converters, enabling their wider deployment. Technologies under Category B will make conversion of existing AC substations into HVDC converter stations possible. By realizing a higher-capacity grid where DC and AC transmission operates in a highly coordinated fashion, DC-GRIDS can lead to higher grid resiliency and significantly improved flexibility when integrating new electricity sources (e.g., offshore wind) onto the U.S. grid.