A Quantitative Evaluation Approach for Critical Operating SCR of MMC System Based on Small-signal Stability and Operating Constraints

被引：0
|
作者：
Wang Y. [1 ]
Guo C. [1 ]
Zhao C. [1 ]
机构：
[1] State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 10期
关键词：
Critical operating short circuit ratio (SCR); Modular multilevel converter (MMC); PQ-control mode; Small-signal stability;
D O I：
10.13334/j.0258-8013.pcsee.180793
中图分类号：
学科分类号：
摘要：
Small-signal stability and operating constraints are two key factors to determine the operation limits of modular multilevel converter based high voltage direct current (MMC-HVDC) system. Taking the MMC system under the commonly used PQ-control mode (i. e. active- and reactive-power-control mode) as the study object, considering the internal harmonic characteristics, a linearized small-signal dynamic model of MMC system was firstly developed in Matlab, and validated by the detailed electromagnetic transient (EMT) simulation in PSCAD/EMTDC. Then, based on eigen-analysis and participation factor analysis, the impacts of short circuit ratio (SCR), impedance angle of AC system and different power-operating-points on the small-signal stability of the MMC system in the rectification/inversion mode were investigated. Finally, an index of critical operating SCR (COSCR) was proposed, considering both the small-signal stability and AC busbar voltage constraint, to quantitatively describe the critical operating stability margin. © 2019 Chin. Soc. for Elec. Eng.
引用
收藏
页码：2853 / 2863
页数：10
相关论文
共 15 条
  • [1] Friedrich K., Modern HVDC PLUS application of VSC in modular multilevel converter topology, 2010 IEEE International Symposium on Industrial Electronics, pp. 3807-3810, (2010)
  • [2] Yao L., Wu J., Wang Z., Et al., Pattern analysis of future HVDC grid development, Proceedings of the CSEE, 34, 34, pp. 6007-6020, (2014)
  • [3] Li T., Gole A.M., Zhao C., Small-signal model of the modular multilevel converter considering the internal dynamics, Proceedings of the CSEE, 36, 11, pp. 2890-2899, (2016)
  • [4] Jamshidifar A., Jovcic D., Small-signal dynamic DQ model of modular multilevel converter for system studies, IEEE Transactions on Power Delivery, 31, 1, pp. 191-199, (2016)
  • [5] Zhou J.Z., Ding H., Fan S., Et al., Impact of short-circuit ratio and phase-locked-loop parameters on the small-signal behavior of a VSC-HVDC converter, IEEE Transactions on Power Delivery, 29, 5, pp. 2287-2296, (2014)
  • [6] Zhang L., Harnefors L., Nee H.P., Interconnection of two very weak AC systems by VSC-HVDC links using power-synchronization control, IEEE Transactions on Power Systems, 26, 1, pp. 344-355, (2011)
  • [7] Yuan B., Li T., Xu J., Et al., Small-signal stability analysis of modular multilevel converter connected to a weak AC system, Proceedings of the CSEE, 37, 18, pp. 5339-5349, (2017)
  • [8] Guo C., Yin Z., Zhao C., Comparative study on small-signal stability of MMC-HVDC system under rectification and inversion modes, Proceedings of the CSEE, 38, 24, pp. 7349-7358, (2018)
  • [9] Yuan B., Xu J., Zhao C., Et al., A virtual resistor based control strategy for enhancing the small-signal stability of MMC integrated in weak AC system, Proceedings of the CSEE, 35, 15, pp. 3794-3802, (2015)
  • [10] Suul J.A., D'Arco S., Rodr I Guez P., Et al., Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters, IET Generation, Transmission & Distribution, 10, 6, pp. 1315-1326, (2016)
12