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A linearised small-signal model of an HVDC converter for harmonic calculation

机译:用于谐波计算的HVDC转换器的线性化小信号模型

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摘要

In this paper a new method is presented for calculation of the harmonics in the ac current and dc voltage of a six-pulse HVDC converter. Instead of fast Fourier transform, FFT, the Fourier series is used in this method. The HVDC converter is represented by a linearised small-signal model in mixed time- frequency domain in which the effects of on and off states resistances, forward voltage drop, and snubber circuits of the thyristors are taken into account. RL series circuits are used for modeling of the converter transformer and ac system. To validate the method a comparison is made with PSCAD/EMTDC time domain simulation program.
机译:本文提出了一种新的方法来计算六脉冲HVDC转换器的交流电流和直流电压中的谐波。该方法使用傅立叶级数代替快速傅立叶变换(FFT)。 HVDC转换器由混合时频域中的线性化小信号模型表示,其中考虑了晶闸管的导通和关断状态电阻,正向压降以及缓冲电路的影响。 RL系列电路用于转换变压器和交流系统的建模。为了验证该方法,与PSCAD / EMTDC时域仿真程序进行了比较。

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