A New Whole-Line Quick-Action Protection Principle for HVDC Transmission Lines Using One-End Current
A New Whole-Line Quick-Action Protection Principle for HVDC Transmission Lines Using One-End Current
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DOI：
10.1109/pesgm.2018.8586307
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发表时间：
2018-08
期刊：
影响因子：
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通讯作者：
G. Song;X. Chu;Shuping Gao;X. Kang;Z. Jiao
中科院分区：
文献类型：
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作者：
G. Song;X. Chu;Shuping Gao;X. Kang;Z. Jiao
高压直流输电系统在现代电力系统中得到了广泛的应用，并对电力系统的稳定性和安全性产生了有益的影响。目前高压直流输电系统的保护动作原理可靠性差，灵敏度不够。针对这些问题，提出了一种新的高压直流输电线路全线速动保护原理。该方法基于线路的边界特征，仅利用单端电流测量值就能区分线路内部故障和外部故障。制定了这种保护的标准。对频率相关参数线路模型和500 kV直流输电系统的实测数据进行了仿真，结果表明该方法是有效可行的。该保护原理清晰，易于实现，有望成为高压直流输电的一级保护。
HVDC transmission systems have found wide applications in modern power systems and have produced a useful influence on the stability and security of power systems. The currently used protections for HVDC systems operate on the principles which have poor reliability and inadequate sensitivity. To overcome these problems, this paper presents a new whole-line quick-action protection principle for HVDC transmission lines. The proposed method, based on the boundary characteristics of the line, can distinguish internal faults from external ones using single-terminal current measurements only. The criterion of this protection has been formulated. Simulations on frequency-dependent parameter-line model and the field-recorded data of a 500-kV HVDC system show that this method is valid and feasible. The proposed protection, sound and clear in principle and easy to implement, can be expected to become a primary protection of HVDC transmission.