Validation of Digital Simulation of DC Links

A project was undertaken to test the validity of the electromagnetic transients simulation of dc links using digital computer programs. The Nelson River dc transmission system of both Bipoles One and Two were modeled on the computer using Manitoba Hydro´s EMTDC program. The well known Electromagnetic Transients Program EMTP was also used for small reduced system models. Results from actual system tests were used to compare with the computer simulation of the same test. Comparisons are also made between EMTDC and EMTP as simulation tools for studying dc transmission. Computer simulation of dc links is presented as a valid option to the use of real time hard wired simulators.