Short-circuit current direct-current component calculation method based on PSASP and EMTP/ATP

• Main Authors: CHEN XIAOYUE, KANG PENGPENG, YANG GUIXING, ZHANG XINGZI, LI YU, YIN XIN, FAN GUOWEI, WANG HENG, LIU DEFU, SUN YIQIAN, SONG PENGFEI, ZHANG FENG, WEN XISHAN
• Format: Patent
• Language: Chinese; English
• Published: 26.06.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to an electric power modeling and simulation technology, in particular to a short-circuit current direct-current component calculation method based on PSASP and EMTP/ATP. The method comprises the following steps: dividing a regional power grid into an internal power grid and an external power grid, setting an analyzed line as the internal power grid and other parts as the external power grid, modeling the internal power grid, and equivalently simplifying the external power grid, wherein nodes between the external power grid and the internal power grid are boundary nodes;equivalently simplifying an external power grid into a multi-terminal network only with boundary nodes, wherein the multi-terminal network comprises an injection current source of the boundary nodes,node self-admittance and mutual admittance between the nodes; using the PSASP software to set a short-circuit fault, sovling an injection current source and an admittance matrix of boundary nodes after external power grid equi