LCC-HVDC Impedance Modeling and Small Disturbance Stability Analysis Based on Improved Switching Function

被引：0
|
作者：
Mo Z. [1 ]
Wang J. [1 ]
Ding T. [2 ]
Liu Y. [1 ]
Ye Y. [1 ]
Fu C. [3 ]
机构：
[1] School of Electric Power, South China University of Technology, Guangdong Province, Guangzhou
[2] State Grid Henan DC Center, Henan Province, Zhengzhou
[3] State Key Laboratory of HVDC (Electric Power Research Institute of China Southern Power Grid), Guangdong Province, Guangzhou
来源：
Dianwang Jishu/Power System Technology | 2022年 / 46卷 / 11期
基金：
中国国家自然科学基金;
关键词：
DC impedance model; grid commutation; improved switching function; small disturbance stability;
D O I：
10.13335/j.1000-3673.pst.2021.2151
中图分类号：
学科分类号：
摘要：
With the increasing of the LCC-HVDC transmission capacity of LCC-HVDC and the deepening of the AC-DC coupling strength, there has been a more and more prominent problem of system stability is becoming more and more prominent. The impedance analysis method is an important method to study the small disturbance stability of the AC/DC interconnected system. Its focus is to establish an accurate DC impedance model. Firstly, based on the improved switching function, the mathematical model of the DC impedance in the frequency domain is established, which considers the factors such as the constant current controller, the constant voltage controller，, the phase-locked loop synchronization phase and the commutation process. Then, the effects of the proportional coefficient and time constant of the constant current controller, the PLL bandwidth at the rectifier side, the proportional coefficient and time constant of the constant voltage controller and the PLL bandwidth at the inverter side on the small disturbance stability of the system are analyzed by the impedance analysis method. Finally, based on the PSCAD / EMTDC simulation platform, the accuracy of DC impedance modeling and the small signal stability analysis is verified in the CIGRE HVDC standard test model and a certain practical engineering model. © 2022 Power System Technology Press. All rights reserved.
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收藏
页码：4491 / 4501
页数：10
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