A Study on Mode-Switching Control of TCSC Based on Conditional Firing of Thyristor
A Study on Mode-Switching Control of TCSC Based on Conditional Firing of Thyristor
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DOI：
10.1109/tpwrd.2010.2080290
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发表时间：
2011-04
影响因子：
4.4
通讯作者：
Kejun Li;Jianguo Zhao;Chenghui Zhang;Weijen Lee
中科院分区：
文献类型：
--
作者：
Kejun Li;Jianguo Zhao;Chenghui Zhang;Weijen Lee
晶闸管串联电容器的模式切换控制方法对电力系统的稳定运行具有重要意义。仅通过改变发射角度来实现模式切换是非常困难的，如果不是不可能的话。首次提出了一种预测电流过零时间的方法，为开关控制及时提供线路电流同步信号。在从电容模式到感应游标模式的切换策略中，提出了晶闸管有条件触发。在线路电流和电容器电压都同相的条件下，晶闸管将被触发和导通。仿真和实验结果表明，所提出的切换方法可以加快切换速度，改善动态性能。
The mode-switching control method of thyristor-controlled series capacitor is of great importance to power system stability. It is very difficult, if not impossible, to realize mode-switching only by changing firing angles. A method of predicting current zero-crossing time is proposed first to provide line current synchronization signals for switching control in time. In the switching strategy from capacitive mode to inductive vernier mode, the thyristor conditional firing is put forward. The thyristor will be fired and conducted on condition that both line current and capacitor voltage are in phase. Simulation and experimental results show that the proposed switching method can make the switching process faster with improved dynamic performance.