MMC Impedance Modeling and Interaction of Converters in Close Proximity

被引：15

作者：

Chen, Yin ^{[1
]}

Xu, Lie ^{[1
]}

Egea-Alvarez, Agusti ^{[1
]}

Marshall, Benjamin ^{[2
]}

Rahman, Md Habibur ^{[2
]}

Oluwole, Adeuyi Daniel ^{[2
]}

机构：

[1] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1XW, Lanark, Scotland

[2] UK Natl HVDC Ctr, Cumbernauld G68 0FQ, Scotland

来源：

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2021年 / 9卷 / 06期

关键词：

Admittnance; harmonic state space (HSS); modular multilevel converter (MMC); stability; MODULAR MULTILEVEL CONVERTER; STABILITY ANALYSIS; ADMITTANCE; DERIVATION; HVDC;

D O I：

10.1109/JESTPE.2020.3031489

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：

This article develops a small-signal impedance model of modular multilevel converters (MMCs) using the harmonic state-space (HSS) method and studies the stability in a multiple converter scenario. In order to simplify analysis of the coupling characteristics between different frequencies in MMCs, the proposed model is developed in the positive-negative-zero (PN0) sequence frame, where the zero-sequence current in a three-phase three-wire system is directly set to zero without introducing a complicated method. A simple 2 x 2 admittance matrix in the PNO-frame is extracted from the MMC small-signal model for ease of system stability analysis. Using the developed impedance model, the multi-infeed interaction factor (MIIF) measure is adopted to analyze the most significant interactions for multi-infeed converter systems to he prioritized. Different outer-loop controllers are adopted and compared in the analysis to illustrate the effect of different control modes on converter impedance and system stability. Analytical studies and time-domain simulation results are provided to validate the proposed model and stability analysis.

引用

页码：7223 / 7236

页数：14

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