High-frequency Resonance Analysis and Impedance Reshaping Control of MMC-HVDC System Based on Frequency Coupling Impedance Model

被引：1
|
作者：
Wang, Juanjuan [1 ]
Chen, Wei [1 ,2 ]
Liu, Yuekun [1 ]
Fu, Chuang [3 ]
Ye, Yunming [2 ]
Feng, Junjie [3 ]
机构：
[1] South China Univ Technol, Sch Elect Power, Guangzhou, Peoples R China
[2] Guangdong Power Grid Co Ltd, Guangzhou, Peoples R China
[3] Elect Power Res Inst, China Southern Power Grid, Guangzhou, Peoples R China
来源：
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY | 2024年 / 12卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Impedance; Couplings; Power system stability; Phase locked loops; Frequency control; Resonant frequency; Damping; Modular multilevel converter based high-voltage direct current (MMC-HVDC); high-frequency resonance; frequency coupling; impedance model; impedance reshaping control; GRID-CONNECTED INVERTER; STABILITY ANALYSIS;
D O I：
10.35833/MPCE.2022.000702
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In recent years, high-frequency resonance (HFR) events occurred in several modular multilevel converter based high-voltage direct current (MMC-HVDC) projects. The time delay of an MMC-HVDC system is the critical factor that induces HFR. The frequency coupling affects the impedance characteristics of an MMC and further deteriorates system stability. Therefore, in this paper, a multi-input multi-output admittance model of an MMC-HVDC system is developed to analyze its frequency characteristics. The effects of current loop, power loop, phase-locked loop, and operating point on the MMC frequency coupling degree are analyzed in detail. Meanwhile, to further suppress HFR in the MMC-HVDC system, an enhanced impedance reshaping control strategy based on the equivalent single-input single-output impedance model is proposed. Finally, the accuracy of the enhanced impedance model and the effectiveness of the impedance reshaping control are verified by electromagnetic transient simulations in PSCAD.
引用
收藏
页码：646 / 657
页数：12
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