The DC grid reliability and cost evaluation with Zhoushan five-terminal HVDC case study

Multi-terminal HVDC (MTDC) is a promising technology for DC grid development. For a certain MTDC system, there are many ways to interconnect the terminals together through DC cables. Such interconnections also known as topologies influence the amount of power transmitted from generators to loads, especially in fault conditions. In order to design a reliable and cost-friendly dc grid, reliability and economic will be chosen as the criteria for topology evaluation. This paper will figure out a reliability and cost evaluation method for dc grids. Zhoushan multi-terminal VSC-HVDC transmission project is given as a case study.