Effect analysis of back-to-back flexible HVDC connecting Chongqing and Hubei Power Grid on sub-synchronous oscillation characteristics

被引:0
|
作者
Wang X. [1 ]
Yang J. [1 ]
Wu Y. [1 ]
Pang H. [1 ]
Kong M. [1 ]
机构
[1] State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing
关键词
Damping characteristics; Flexible HVDC; Hybrid damping control; Sub-synchronous oscillation;
D O I
10.16081/j.issn.1006-6047.2019.07.028
中图分类号
学科分类号
摘要
The potential factors causing subsynchronous oscillation in Fengjie plants are analyzed before and after the operation of back-to back flexible HVDC transmission project connecting Chongqing and Hubei Power Grid. The damping characteristics of system in each frequency band are analyzed by complex torque coefficient approach combined with time-domain simulation, and the risk of sub-synchronous oscillation of Fenjie plants before and after the project operation is analyzed in terms of mechanism. On this basis, a hybrid damping control strategy is designed using multi-dimensional controllable characteristic, flexible and fast control characteristic of flexible HVDC. The ty-pical working conditions are simulated, and results show that the proposed control strategy can make the system recover to steady state more quickly than the traditional control strategy. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码:188 / 194and202
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