双桥串联顺序控制的晶闸管变流器给电网带来不容忽视的谐波危害。
The harmonic endanger was serious, which was engendered by double bridge cascade connection sequential control SCR converter.
文中给出了按照面积中心等效法合成SPWM波形的机理以及面积中心等效算法，并对双极性面积中心等效法生成的SPWM波形进行了谐波分析。
The paper puts forward the mechanism of combined waveform and computation of a SPWM area center equivalent. Harmonic of double pole SPWM waveform is analyzed in this paper.
同时对波形进行了频谱分析，指出了电压谐波成分对双馈电机稳态性能的影响情况。
At the same time the paper analyses the frequency spectrum of the wave from, and indicates the influence of voltage harmonic wave component on the steady state performance.
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