电流追踪型电力变换器研究

Research on Electric Power Converter Based on Current-tracing Control Technology

传统的电力变换器中的高次谐波,污染电网成为电力公害已是不容忽视的问题。为了防止电网遭受到污染,在高功率因数电力变换器方面的研究得到社会的广泛重视。根椐电流追踪控制技术,采用新型的控制器件,设计了以高性能的DSP芯片TMS320LF240A为核心的全数字控制系统,根椐电力变换器的工作原理对电力变换器进行控制。由于控制系统对输入电流进行了实时的控制,可以改变输入电流的相位和大小使电力变换器的功率因数提高,从而改善了电力系统的运行特性,具有一定的技术和经济意义。

It is a serious problem that the power net is polluted by the higher harmonic wave of conventional power converter. To prevent that, the attention is paid to the study of high-power-factor power converter. According to the current-tracing control technology, the digital control system based on the high performance DSP chip TMS320LF2407 was designed in order to control the electric power converter. With the appropriate realtime control on the input current, the system was capable of changing the amplitude and phase of the input current and improving the power factor, and then was able to weaken the influences of the working performance of the powor system. The system has certain economical and technological significance.