Study on Impacts of Generator Cluster Swing in Sending-End Grid on DC Recovery Characteristics

被引：0
|
作者：
Gu Z. [1 ]
Zhang J. [1 ]
Yi J. [1 ]
Liu N. [2 ]
Yu Q. [1 ]
机构：
[1] State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Haidian District, Beijing
[2] State Grid Corporation of China, Xicheng District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2018年 / 42卷 / 07期
关键词：
AC and DC power grid; Commutation failure; Generator cluster swing; UHVDC;
D O I：
10.13335/j.1000-3673.pst.2018.0198
中图分类号：
学科分类号：
摘要：
In recent years, hybrid AC/DC power grid in China begins to take shape, and security and stability characteristics of power systems undergo profound changes. Besides, interaction and coupling characteristics between large capacity UHVDC transmission lines and AC power grids become more complex. The paper firstly studies impacts of generator swing in sending-end grid on DC power recovery characteristics, indicating that when some faults stimulate generator cluster swing and lead to DC bus voltage drop, the DC power in recovery process will collapse. Secondly, based on actual example, an analysis of generator cluster swing under multi DC lines commutation failure occurring at the same time due to single permanent fault in receiving end grid is put forward. The drop degree of DC power after commutation failure elimination is analyzed, and the impact of secondary disturbance caused by DC power drop on AC power grid and transmission capacity of important weak cross section is discussed. Conclusions of this paper provides reference for power grid operators to reasonably arrange operation mode, and helps to ensure safe and stable operation of power grid. © 2018, Power System Technology Press. All right reserved.
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页码：2030 / 2037
页数：7
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