DOI:10.35833/MPCE.2019.000431 Continuous Commutation Failure Suppression Method Based on Self-adaptive Auto-disturbance Rejection Proportional-integral Controller for HVDC Transmission System Page view: 0        Net amount: 139 Author: Tonghua Wu1,2,3,Yuping Zheng1,2,3,Qipu Liu1,Guoqiang Sun1,Xiaohong Wang2,3,Xindong Li2 Author Affiliation: 1.College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;2.NARI Group Corporation, Nanjing 211106, China;3.State Key Laboratory of Smart Grid Protection and Control, Nanjing 211106, China Foundation: This work was supported by the Science and Technology Project of State Grid Corporation of China (No. 524608170147). The authors would like to express appreciation and gratitude to NARI Group Corporation, Nanjing, China, and the State Key Laboratory of Smart Grid Protection and Operational Control, Nanjing, China for the measurement and recording of experimental protocols and experimental data. Abstract: 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. Keywords: High-voltage direct current (HVDC) transmission ; continuous commutation failure ; periodic fluctuation ; self-adaptive auto-disturbance rejection proportional-integral (PI) controller ; computer simulation Received:June 27, 2019               Online Time:2020/12/03 View Full Text       Download reader