【摘要】 选择电容电压作为脉冲触发同步信号 ,对 TCSC阻抗阶跃特性的电磁暂态过程进行了深入的研究。发现脉冲触发角阶跃变小 (大 )时 ,电容电压的周期时间也突然变小 (大 ) ,使得 TCSC的导通角不会随着触发角的阶跃变化而发生突变 ,而是经过一个振荡过程逐渐达到稳态值 ,进一步揭示了电容电压同步方式下阻抗阶跃特性会出现过冲和振荡现象的原因。最后提出了 2种能够改善TCSC阻抗阶跃特性的脉冲触发控制方式 ,并借助数字仿真予以验证。更多还原

【Abstract】 The electrom agnetic transient process of the impedance step characteristics of thyristor controlled series com pensation TCSC is studied. Digital simulation results show that when a step change in firing angle occurs,the first positive half- cycle time of VC will change suddenly and the subsequent electrom agnetic transients appearing in the TCSC circuit will lead to overshootand oscillations in the TCSC impedance.The range and duration of the oscillation will depend on the synchronization modes used and the manner in which the step change is introduced. Finally two im proved pulse firing control schem es are given and are verified by simulation results.更多还原