New Island Robust Control for Renewable Energy Generation Sent Through Islanded MMC-HVDC

被引：0
|
作者：
Zhang Z. [1 ]
Kang Z. [1 ]
Zhao B. [2 ]
Wang S. [2 ]
Wang T. [2 ]
Yin R. [3 ]
Zhang A. [1 ]
机构：
[1] College of New Energy, China University of Petroleum (East China), Qingdao
[2] China Electric Power Research Institute, Haidian District, Beijing
[3] School of Electrical Engineering, Shandong University, Jinan
来源：
Dianwang Jishu/Power System Technology | 2022年 / 46卷 / 01期
关键词：
Island control; Linear extended state observer(LESO); MMC-HVDC converter station; Robustness; Stability analysis;
D O I：
10.13335/j.1000-3673.pst.2021.0182
中图分类号：
学科分类号：
摘要：
The renewable energy generation sent through the islanded MMC-HVDC system is susceptible to the output changes and the faults in AC or DC. When a traditional island control is disturbed, the stable operating point shifts, which affects the stability of the output AC voltage in the sending-end converter station, even severely causing a crash in the system. Therefore, this paper proposes a new type of island robust control: Firstly, a second-order mathematical model of the sending-end converter station is established, a third-order linear extended state observer (LESO) is designed to estimate the disturbance of the system in real time and be feedforward compensated to improve the ability of anti-disturbance, and the proportional-integral (PI) controller is used to control the stability of the grid-connected point voltage. Secondly, the convergence and stability of the proposed control system are analyzed. Finally, the link of the fault current suppression is designed to reduce the overcurrent risk of the MMC after a fault. Adopting a compound control of feedforward with feedback, the new island control simplifies the controller structure while improving its robustness. The simulation model of renewable energy generation sent through a four-terminal islanded MMC-HVDC system is built in the PSCAD/EMTDC to verify the effectiveness of the control strategy proposed in this paper. The simulation results show that the new island control has a superior transient response and recovery response under the disturbance of the output changes of the renewable energy and the faults in AC or DC. © 2022, Power System Technology Press. All right reserved.
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页码：111 / 120
页数：9
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共 30 条
  • [1] WANG Xifan, WEI Xiaohui, NING Lianhui, Et al., Integration techniques and transmission schemes for off-shore wind farms, Proceedings of the CSEE, 34, 31, pp. 5459-5466, (2014)
  • [2] GUO Xianshan, ZHOU Yang, MEI Nian, Et al., Construction and characteristic analysis of Zhangbei VSC-HVDC DC power grid, Power System Technology, 42, 11, pp. 3698-3707, (2018)
  • [3] HAO Chengyong, MA Guopeng, LI Guangkai, Research on characteristics of regulation of VSC-HVDC supplying power to passive network, Journal of North China Electric Power University: Natural Science Edition, 35, 6, pp. 39-43, (2008)
  • [4] CHEN Shuyong, XU Linyan, SUN Xu, Et al., The control of wind power integration based on multi-terminal high voltage DC transmission with voltage source converter, Proceedings of the CSEE, 34, pp. 32-38, (2014)
  • [5] GUAN Minyuan, XU Zheng, Modeling and control of modular multilevel converter based VSC-HVDC system connected to passive networks, Transactions of China Electrotechnical Society, 28, 2, pp. 255-263, (2013)
  • [6] FU Yongliang, WANG Ben, CHEN Xinhua, Et al., Passive control ADRC strategy for connection of wind farm and power grid with VSC-HVDC system, Southern Power System Technology, 7, 4, pp. 19-23, (2013)
  • [7] LIU Haiyuan, YANG Bo, GUO Yinan, Et al., MMC-MTDC dual factor adaptive droop control strategy for large-scale renewable energy integration, Proceedings of the CSEE, 39, 3, pp. 793-802, (2019)
  • [8] YANG Renxin, SHI Gang, CAI Xu, Et al., Voltage source control of VSC-MTDC systems with wind farm integration, Proceedings of the CSEE, 40, 5, pp. 1498-1509, (2020)
  • [9] MEI Nian, YUAN Bin, LI Tan, Et al., Study on control strategy of bipolar VSC station connected to islanded renewable power plant, Power System Technology, 42, 11, pp. 3575-3582, (2018)
  • [10] XU Dong, HAN Minxiao, DU Xu, Et al., Model predictive control for VSC with wind farm connected in the hybrid three-terminal DC Grid, Proceedings of the CSEE, 35, 13, pp. 3195-3203, (2015)
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