Stability Analysis of PLL Influenced by Control Loops in Grid-connected Converters Under Fault Disturbance

作     者：Yushuang Liu Meng Huang Xiaoming Zha Herbert Ho-Ching Iu Yushuang Liu;Meng Huang;Xiaoming Zha;Herbert Ho-Ching Iu

作者机构：School of Electrical Engineering and AutomationWuhan UniversityWuhan 430000China School of ElectricalElectronic and Computer EngineeringThe University of Western AustraliaCrawley WA 6009Australia 

出 版 物：《CSEE Journal of Power and Energy Systems》 (中国电机工程学会电力与能源系统学报（英文）)

年 卷 期：2020年第6卷第2期

页      面：239-248页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(51877159 51637007 U1866601) 

主　　题：Control loop grid-connected MMC ground fault phase-locked loop transient stability 

摘      要：When the power grid suffers from grid faults that cause phase disturbances,the grid-connected converter becomes destabilized by the interaction between the phase-locked loop(PLL)and the control *** this paper,the stability of the PLL affected by the control loop under transient grid faults is ***,the equivalent model of the PLL under the influence of the control loop is ***,different response processes of PLLs under the ground fault with various control parameters are qualitatively ***,a small-signal model is proposed to assess the stability of the PLL under different control loop *** system poles can be calculated to show the physical origin of the ***,simulations of a three-phase 21-level modular multilevel converter(MMC)built in PSCAD and a down-scale experiment is performed to verify the parameter influence of the control loop on the PLL.