Development and Research of HVDC Light System Based on DSP

Abstract

After entering the 1990s, a new metal oxide semiconductor device-- insulated gate bipolar transistor (IGBT) was first widely used in the industrial driving device. The voltage source converter using IGBT has the ability to turn off current and it can also carry out passive inversion by using pulse width modulation (PWM) technology, which solves the problem of DC transmission to load points without AC supply. Because of strong function and small volume of this converter, it can reduce filtering devices in converter stations, omit converter transformers and simplify the structure of converter station, it is called HVDC light. This paper emphasizes the control technology of HVDC Light system based on VSC core research and designs the experimental system of HVDC Light, including overall design, parameter configuration of main circuit and software and hardware implementation schemes, etc; among these, converter is simulated by IGBT intelligent power module (IPM) and the control algorithm of the system is realized by DSP TMS320F2812A.