Research on custom modeling and Simulation of STATCOM based on PSCAD

Digital simulation modeling can meet different engineering needs, be easy to debug, and shorten the development time of engineering research. This paper analyzes the working principle of STATCOM device. Taking the three-phase H-bridge STATCOM device as an example, on the PSCAD simulation platform, using the user-defined modeling function interface technology, using C language static variables, allocating memory through common arrays, an accurate and detailed digital STATCOM model is established, and simulation experiments are carried out. The research shows that the application of user-defined module effectively makes up for the shortcomings of its own component library, and enhances the flexibility of simulation and engineering practical value. At the same time, the user-defined STATCOM device model based on PSCAD/EMTDC platform can accurately describe its compensation characteristics, and has the advantages of fast response and strong reactive power regulation ability, which can be used in the field of reactive power compensation in power system.