Coordinated start-up strategy for MMC-MTDC system

被引：0
作者：
Qiu, Peng [1 ]
Yang, Meijuan [2 ]
Zhang, Shujun [3 ]
Huang, Xiaoming [1 ]
Lu, Yi [1 ]
Yao, Weizheng [2 ]
机构：
[1] Zhejiang Electric Power Corporation Research Institute, Hangzhou, 310014, Zhejiang Province
[2] Xuji Group Corporation, Xuchang, 461000, Henan Province
[3] Zhejiang Electric Power Corporation, Hangzhou, 310000, Zhejiang Province
来源：
Dianwang Jishu/Power System Technology | 2015年 / 39卷 / 07期
关键词：
Closed-loop voltage-balance charging strategy; Coordinated start-up strategy; MMC-MTDC; Pre-charging modes;
D O I：
10.13335/j.1000-3673.pst.2015.07.006
中图分类号：
学科分类号：
摘要：
Coordinated start-up strategy for MMC-MTDC system was proposed to start the system rapidly and smoothly while avoiding large electric shock and even start failure caused by mismatches between stations. Firstly, three pre-charging modes by AC side, DC side and both AC and DC sides respectively were pointed out. Based on their charging mechanisms, a method to identify the pre-charging mode for MMC was designed and a closed-loop voltage-balance charging strategy was advanced which can precharge the capacitor voltage of sub-module to its normal level. Secondly, the coordinated start-up strategy using DC voltage's ramp control method for parallel connected MMC-MTDC was proposed based on analyzing the effective cooperation plan for stations' starting sequences. Finally, simulation using a model of three-terminal MMC-MTDC system in Matlab/Simulink was conducted. The results show that the proposed closed-loop voltage-balance charging strategy can adapt all three pre-charging modes automatically and charge the sub-module's capacitor to its normal level stably, and the coordinated start-up strategy accomplishes a smoothly unlocking for the MTDC system. ©, 2015, Power System Technology Press. All right reserved.
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页码：1800 / 1807
页数：7
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