中国电机工程学报2017，Vol.37Issue(8)：2185-2195,11.DOI:10.13334/j.0258-8013.pcsee.160144
MMC-HVDC内部谐波模态识别及其稳定性分析
Identification and Stability Analysis of the Internal Harmonic Modes of the MMC-HVDC System
李探 1赵成勇 2Aniruddha M. Gole3
作者信息
- 1. 国网北京经济技术研究院,北京市昌平区 102209
- 2. 新能源电力系统国家重点实验室 (华北电力大学),北京市昌平区 102206
- 3. 曼尼托巴大学,加拿大曼尼托巴温尼伯 R3T 5V6
- 折叠
摘要
Abstract
The small-signal model of the modular multilevel converter (MMC) with various of circulating current suppressing strategies was established, based on the concept of "dynamic phasor". The small-signal model was validated by comparison with the time-domain simulation. Then mode analysis was implemented and the participation factors of the variables in the modes were calculated, based on which the modes of the MMC-HVDC system are divided into "external modes" and "internal harmonic modes". It is demonstrated that a simplified small-signal model which neglects the internal harmonic dynamics can not be used to analyze the "internal harmonic modes". Then, the internal harmonic modes were analyzed and the factors influencing these modes were researched in detail. It is revealed that the internal harmonic modes are always poorly damped, and can not be neglected when doing stability analysis. The circulating current suppressing strategy, the equivalent arm resistance, the outer loop controller parameters all have great influence on these modes. The "internal harmonic instability" phenomenon was revealed for the first time. At last, some conclusions on how the internal harmonic modes are influenced were derived, which are of significance for controller parameters design and project debugging.关键词
模块化多电平换流器/小信号稳定性/内部谐波模态/内部谐波不稳定Key words
modular multilevel converter (MMC)/small-signal stability/internal harmonic modes/internal harmonic instability分类
信息技术与安全科学引用本文复制引用
李探,赵成勇,Aniruddha M. Gole..MMC-HVDC内部谐波模态识别及其稳定性分析[J].中国电机工程学报,2017,37(8):2185-2195,11.
