电气传动2025，Vol.55Issue(6)：25-35,11.DOI:10.19457/j.1001-2095.dqcd25495
弱连接VSC的PLL同步失稳特性分析及补偿控制策略
Analysis of PLL Synchronous Instability Characteristics and Compensation Control Strategy for Weak Gird Connected VSC
程亮 1段彭洋 1苏宏帮 1田生娟 1齐晓璇 1颜生萍1
作者信息
- 1. 国网青海省电力有限公司国网青海营销服务中心,青海 西宁 810001
- 折叠
摘要
Abstract
In the background of a high proportion of new energy source connected to grid,the phenomenon of new energy interface inverters being connected to the grid through long-distance AC lines is becoming increasingly significant.The traditional vector controlled weak grid connected voltage source converter(VSC)based on phase locked loop(PLL)synchronization is prone to PLL synchronization instability.To improve the PLL synchronization stability of weakly connected VSC,an analytical model to reveal the PLL synchronization instability mechanism of weakly connected VSC was established.Through theoretical analysis,the influence of the dynamic coupling characteristics of PLL and different time scale control links on the PLL synchronization instability mechanism was revealed.Based on the theoretical analysis results,a PLL dynamic compensation control strategy suitable for multiple time scales was designed to improve the PLL synchronization stability of weakly connected VSC.The simulation results based on Matlab/Simulink verify the correctness of the theoretical analysis and the effectiveness of the compensation control strategy.关键词
电压源换流器/PLL同步稳定性/机理分析模型/动态交互/补偿控制策略Key words
voltage source converter(VSC)/PLL synchronous stability/mechanism analysis model/control loops interaction/compensation control strategy分类
动力与电气工程引用本文复制引用
程亮,段彭洋,苏宏帮,田生娟,齐晓璇,颜生萍..弱连接VSC的PLL同步失稳特性分析及补偿控制策略[J].电气传动,2025,55(6):25-35,11.
