Application Prospects of the Superconducting Dynamic Synchronous Condenser

The new power system based on renewable energy sources may bring the problems of voltage and frequency stability due to the high-level power electronic-based interfaced generation. As a reliable reactive power compensation equipment, dynamic synchronous condensers (DSCs) have the merits of short response time and high overload capacity. They can also improve the system inertia and short-circuit current capacity, and play the role of voltage and frequency stabilizer in the power system. Compared with the conventional DSCs, the superconducting DSCs have higher efficiency, stronger voltage support ability and more excellent reactive compensation performance. In 2018, a research project was launched to explore the feasibility of the superconducting DSC in power grid. The project has achieved significant progress. A hundred-kW prototype was designed and made for technical verification, and the design procedure of the 10 Mvar one is being carried out.