Full-order terminal sliding mode control method based on back-to-back VSC-HVDC

The invention discloses a full-order terminal sliding mode control method based on a back-to-back VSC-HVDC. The two converters are controlled in the same way. The inner loop controller of the converter uses a full-order terminal sliding mode controller. The outer loop controller of the converter uses a PI controller. The outer loop controller outputs a reference current to be inputted to the innerloop controller. The inner loop controller outputs a voltage signal through the full-order terminal sliding mode controller and outputs a modulation signal through modulation to control on/off of theconverter. According to the inner loop and outer loop PI controller based on the full-order TSM, the cross-coupling term of the current in the two-phase static reference system can be avoided. The controller does not require feedforward decoupling so that the whole control system is enabled to be simple. 本发明公开了一种基于背靠背VSC-HVDC的全阶终端滑模控制方法，两个换流器的控制方法相同，换流器的内环控制器采用全阶终端滑模控制器，换流器的外环控制器采用PI控制器，外环控制器输出参考电流输入内环控制器中，内环控制器通过全阶终端滑模控制