Research on synchronous condenser’s influences on receiving-end provincial grid and its control strategy

被引：0
|
作者：
Zhao J. [1 ]
Meng X. [1 ]
Zhu X. [1 ]
机构：
[1] State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 20期
关键词：
Commutation failure; Control strategy; Multi-infeed short circuit ratio; Short-circuit current; Synchronous condensers; Voltage stability;
D O I：
10.19783/j.cnki.pspc.181418
中图分类号：
学科分类号：
摘要：
After synchronous condenser being put into operation as the match project of UHVDC transmission, it’s reasonable to investigate its influence on the operation of large-scale AC-DC hybrid grids, as well as explore its control strategy. Firstly, this paper researches the reactive power characteristics of condenser and builds its reactive power supporting models for different time scales. Secondly, simulations are carried out with the East China Power Grid, the condenser’s influences on voltage characteristics, short-circuit current and commutation failure characteristics are analyzed. The result reveals that condenser could considerably enhance the voltage supporting capability, improve the power grid strength and decrease the risk of UHVDC commutation failure. The validity of theoretical analysis is also verified by the simulation. Finally, a unified dispatch strategy which adopts small difference coefficients and steady lagging-phase operation is proposed for integrating the condenser into AVC system. By adopting the proposed strategy, condenser’s dynamic reactive power supporting function can be sufficiently utilized. © 2019, Power System Protection and Control Press. All right reserved.
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页码：25 / 32
页数：7
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