Commutation failure control and recovery strategy of UHVDC with hierarchical connection mode

被引：0
|
作者：
Wang S. [1 ]
Wen J. [1 ]
He D. [1 ]
Geng X. [1 ]
Tan M. [2 ]
Han M. [1 ]
机构：
[1] School of Electrical & Electronic Engineering, North China Electric Power University, Beijing
[2] State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Beijing
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2020年 / 48卷 / 02期
关键词：
Automatic restart; Commutation failure; Fault recovery; Hierarchical isolation; Real-time fault detection; Receiving-end with hierarchical connection; Ultra-high voltage direct current (UHVDC);
D O I：
10.19783/j.cnki.pspc.190258
中图分类号：
学科分类号：
摘要：
The commutation failure of the valve group will happen in the hierarchy where the single voltage level of Alternative Current (AC) system fails. It will also happen in another hierarchy in Ultra-High Voltage Direct Current (UHVDC) transmission project with hierarchical connection. The interaction between hierarchies of AC and DC system will also lead to successive and multiple commutation failures in the process of fault recovery. A commutation failure control and recovery strategy based on real-time fault detection and determination is presented, which can judge the fault state, the voltage level when fault occurs, and the duration of the fault. Start control strategy only when the instantaneous fault of AC system is serious. The times of automatic restart can be reduced by preventing early restart in the recovery process. The hierarchy is changed to bipolar half-voltage operation mode when serious failure occurs permanently in a single-hierarchy AC system. Based on Changji-Guquan UHVDC transmission project, a simulation model of UHVDC transmission with hierarchical connection is established in PSCAD/EMTDC. Meantime, various fault situations are set up. The results show that the proposed strategy can effectively reduce the number of successive commutation failures, accelerate fault recovery and improve transmission reliability. ©2020, Power System Protection and Control Press. All right reserved.
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页码：172 / 179
页数：7
相关论文
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