Influence of Different PLLs on Stability of LCC-HVDC Control Loop

被引：0
|
作者：
Liu J. [1 ]
Wang J. [1 ]
Ye Y. [2 ]
Wang Z. [1 ]
机构：
[1] School of Electric Power, South China University of Technology, Guangdong Province, Guangzhou
[2] Guangzhou Power Supply Bureau, Guangdong Power Grid Limited Liability Company, Guangdong Province, Guangzhou
来源：
Dianwang Jishu/Power System Technology | 2024年 / 48卷 / 03期
基金：
中国国家自然科学基金;
关键词：
high voltage direct current (HVDC) transmission; phase locked loop; small interference dynamic model; stability margin;
D O I：
10.13335/j.1000-3673.pst.2023.0121
中图分类号：
学科分类号：
摘要：
In this paper, the influence of PI parameter changes of the phase-locked loop control loop on the stability margin of the DC control loop when different phase-locked loops are used on the inverter side of in the line commutated converter high voltage direct current (LCC-HVDC) system is studied. Firstly, the LCC-HVDC small interference dynamic model using the moving average filter (MAF) and the cascaded delayed signal cancellation (CDSC) of the inverter side phase-locked loop is established, and then the correctness of the small interference dynamic model is verified by electromagnetic transient simulation. Secondly, based on the Laplace transform, the transfer function of the constant voltage control loop of the system is obtained, and the influence of different phase-locked loops on the stability of the constant voltage control loop is evaluated from the stability margin index. The simulation results verify the correctness of the theoretical analysis results. Finally, the relevant verification is carried out on the engineering model to illustrate the generality of the conclusions in this paper. © 2024 Power System Technology Press. All rights reserved.
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页码：1202 / 1213
页数：11
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