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Continuous Commutation Failure Suppression Method Based on Self-adaptive Auto-disturbance Rejection Proportional-integral Controller for HVDC Transmission System
Journal of Modern Power Systems and Clean Energy ( IF 5.7 ) Pub Date : 2020-10-22 , DOI: 10.35833/mpce.2019.000431
Tonghua Wu , Yuping Zheng , Qipu Liu , Guoqiang Sun , Xiaohong Wang , Xindong Li

Once an asymmetrical fault occurs on the AC side of the receiving-end of a high-voltage direct current (HVDC) transmission system, the current reference will be affected by the control regulation on the DC inverter side and the commutation voltage asymmetry. In this case, the advance firing angle will fluctuate periodically, causing security threats to the system. If the fault cannot be cleared in time, the effect may be even more serious. However, the traditional proportional-integral (PI) controller cannot effectively suppress the periodic components in the input error signal, which is an important cause of continuous commutation failure. Thus, the system requires more time to recover from the fault. Motivated by this, a self-adaptive auto-disturbance rejection PI controller is proposed in this study. The controller has the advantages of fast response speed and strong anti-interference ability of the auto-disturbance rejection controller. On one hand, it can automatically adjust PI, and the parameters can maintain the system's adaptive ability. On the other hand, the discretization process satisfies the computer simulation requirements. By applying the proposed controller to a system under constant current control and extinction angle control, the dynamic response speed can be improved and the robust performance of the system can be ensured when dealing with a wide range of perturbations. Finally, simulation results show that the proposed algorithm can effectively suppress the continuous commutation failure of DC transmission systems.

中文翻译:

基于自适应自干扰抑制比例积分控制器的高压直流输电连续换相失败抑制方法

一旦在高压直流(HVDC)传输系统的接收端的交流侧发生不对称故障,则电流参考将受到直流逆变器侧的控制规则和换向电压不对称的影响。在这种情况下,提前发射角将定期波动,从而对系统造成安全威胁。如果不能及时清除故障,后果可能更加严重。但是,传统的比例积分(PI)控制器不能有效地抑制输入误差信号中的周期分量,这是连续换向失败的重要原因。因此,系统需要更多时间从故障中恢复。为此,提出了一种自适应自干扰抑制PI控制器。该控制器具有自动干扰抑制控制器响应速度快,抗干扰能力强的优点。一方面,它可以自动调节PI,并且参数可以保持系统的自适应能力。另一方面,离散化过程满足计算机仿真要求。通过将所提出的控制器应用于恒流控制和消光角控制下的系统,可以提高动态响应速度,并在处理各种干扰时确保系统的鲁棒性能。最后,仿真结果表明,该算法可以有效抑制直流输电系统的连续换相失败。它可以自动调节PI,并且参数可以保持系统的自适应能力。另一方面,离散化过程满足计算机仿真要求。通过将所提出的控制器应用于恒流控制和消光角控制下的系统,可以提高动态响应速度,并在处理各种干扰时确保系统的鲁棒性能。最后,仿真结果表明,该算法可以有效抑制直流输电系统的连续换相失败。它可以自动调节PI,并且参数可以保持系统的自适应能力。另一方面,离散化过程满足计算机仿真要求。通过将所提出的控制器应用于恒流控制和消光角控制下的系统,可以提高动态响应速度,并在处理各种干扰时确保系统的鲁棒性能。最后,仿真结果表明,该算法可以有效抑制直流输电系统的连续换相失败。通过将所提出的控制器应用于恒流控制和消光角控制下的系统,可以提高动态响应速度,并在处理各种干扰时确保系统的鲁棒性能。最后,仿真结果表明,该算法可以有效抑制直流输电系统的连续换相失败。通过将建议的控制器应用于恒流控制和消光角控制下的系统,可以提高动态响应速度,并在处理各种摄动时确保系统的鲁棒性能。最后,仿真结果表明,该算法可以有效抑制直流输电系统的连续换相失败。
更新日期:2020-12-04
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