HIGH FREQUENCY OSCILLATION ANALYSIS AND SUPPRESSION OF MMC-HVDC GRID CONNECTED SYSTEM BASED ON IMPEDANCE METHOD

被引:0
作者
Wang X. [1 ]
机构
[1] CGN Uranium Industry Development Co.,Ltd., Beijing
来源
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 03期
关键词
control system analysis; HVDC power transmission; impedance characteristic analysis; modular multilevel converter(MMC); offshore wind farms; oscillation suppression;
D O I
10.19912/j.0254-0096.tynxb.2022-1688
中图分类号
学科分类号
摘要
In order to solve the problem that a certain offshore wind power is connected to the power grid through modular multilevel converter(MMC),and broadband oscillation occurs between the onshore converter station and the power grid,the frequency domain model of MMC control system in dq coordinates is established based on the idea of impedance analysis and MMC control system structure. The d and q coupling parts of the MMC control system model are converted to the time domain and abc coordinate system for simplification,and the system decoupling is realized. Then the frequency domain model of the MMC control system in abc coordinate system is established,and its equivalent impedance model is established based on the analysis of the MMC equivalent circuit. The characteristics of converter impedance model and power grid impedance model are analyzed by impedance analysis method,and the mechanism of oscillation is verified. Finally,the measures to suppress broadband oscillation are analyzed,and the solution of additional band stop filter is given,which is verified by the oscillation phenomenon of field cases. © 2023 Science Press. All rights reserved.
引用
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页码:244 / 252
页数:8
相关论文
共 27 条
  • [1] TANG G F,, HE Z Y,, PANG H., Research,application and development of VSC- HVDC engineering technology [J], Automation of electric power systems, 37, 15, pp. 3-14, (2013)
  • [2] CHEN H L, ZHENG X Y., Research on frequency support of offshore wind power VSC-MTDC grid connected system [J], Acta energiae solaris sinica, 43, 3, pp. 356-365, (2022)
  • [3] XIN Y C, WANG W R, LI G Q,, Et al., Control strategy on grid connected offshore wind farm based on MMC-HVDC [J], Acta energiae solaris sinica, 40, 6, pp. 1731-1738, (2019)
  • [4] ZHAO S Q, SHEN J L, SHAO B B., Subsynchronous oscillation characteristics analysis of grid-connected direct-drive wind farms via VSC-HVDC system under whole operation regions of D- PMSG[J], Acta energiae solaris sinica, 42, 12, pp. 163-173, (2021)
  • [5] SUN J., Impedance modelling and analysis of grid-connected voltage-source converters[J], IEEE transactions on power electronics, 29, 3, pp. 1254-1261, (2014)
  • [6] GUO Q, HUANG L B., Effect of grid voltage feedforward on VSC- HVDC stability in weak power grid [J], Automation of electric power systems, 42, 14, pp. 139-144, (2018)
  • [7] DU D Y, GUO C Y,, JIA X F,, Et al., Suppression strategy for high frequency resonance of modular multilevel converter based on additional band-stop filter[J], Transactions of China Electrotechnical Society, 36, 7, pp. 1516-1525, (2021)
  • [8] GUO X S, MEI H M,, Et al., Analysis and suppression of resonance between AC and DC systems in Chongqing- Hubei back- to- back HVDC project of China [J], Automation of electric power systems, 44, 20, pp. 157-164, (2020)
  • [9] NIAN H, ZHU M W, Et al., Impedance modeling and system stability analysis of MMC with doubleclosed-loop AC voltage control[J], Automation of electric power systems, 44, 4, pp. 81-90, (2020)
  • [10] FENG J J, ZOU C Y,, YANG S F,, Et al., Accurate impedance modeling and characteristic analysis of VSC-HVDC system for mid- and high- frequency resonance problems[J], Proceedings of the CSEE, 40, 15, pp. 4805-4819, (2020)