Study on a coordinate control strategy of multi-HVDC links to improve transient stability in China Southern Power Grid

2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC) Pub Date : 2016-10-01 DOI:10.1109/APPEEC.2016.7779712

Zhenlin Huang, L. Guan, Xingwang Chen, P. Shen, Jie Zhang

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引用次数: 6

Abstract

Since High Voltage Direct Current (HVDC) has overload-ability and quickly adjustable features, by rapidly modulating HVDC power in an AC/DC grid, HVDC can compensate power imbalance between sending-grid and receiving-grid and enhance transient stability after a heavy disturbance. In previous studies, the feasibility and effectiveness of an automatic real-time control strategy of HVDC in a single HVDC link system have been discussed. This paper focuses on the application of this control strategy in a multi-HVDC links system and the mutual influence between different HVDC links. Simulations in a transient simulation model of China Southern Power Grid (CSG) by the EMTDC/PSCAD software show that the coordinated control of multi-HVDC links contributes a significant improvement of the system transient stability after a large disturbance. When all of the four HVDC lines in CSG involve in the coordinated control, the stability of the system will be most obviously improved after a large disturbance. Meanwhile the mutual influence between the HVDC links is very limited.

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提高南方电网暂态稳定的多直流协调控制策略研究

高压直流(High Voltage Direct Current, HVDC)具有过载能力和快速可调的特点，通过快速调制交直流电网中的高压直流功率，可以补偿发、受电网之间的功率不平衡，增强强扰动后的暂态稳定性。在以往的研究中，已经讨论了单个HVDC链路系统中HVDC自动实时控制策略的可行性和有效性。本文重点研究了该控制策略在多直流线路系统中的应用，以及不同直流线路之间的相互影响。利用EMTDC/PSCAD软件对南方电网暂态仿真模型进行了仿真，结果表明，多直流线路的协同控制对大扰动后系统暂态稳定性有显著改善。当CSG内的4条高压直流线路全部参与协调控制时，大扰动后系统的稳定性得到最明显的改善。同时，直流输电线路之间的相互影响非常有限。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

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