适用于混合级联特高压直流输电系统的可控自恢复消能装置  

Controllable and Adaptive Energy Absorption Device for Hybrid Cascaded UHVDC Transmission System

作　　者：刘泽洪 王绍武 种芝艺 黄勇 郭贤珊 肖鲲 刘杉 李探 赵文强[4] LIU Zehong;WANG Shaowu;CHONG Zhiyi;HUANG Yong;GUO Xianshan;XIAO Kun;LIU Shan;LI Tan;ZHAO Wenqiang(State Grid Corporation of China,Xicheng District,Beijing 100031,China;Global Energy Interconnection Research Institute,Changping District,Beijing 102209,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Changping District,Beijing 102209,China;Nanjing Nanrui Jibao Electric Co.,Ltd.,Nanjing 211102,Jiangsu Province,China)

机构地区：[1]国家电网有限公司,北京市西城区100031 [2]全球能源互联网研究院有限公司,北京市昌平区102209 [3]国网经济技术研究院有限公司,北京市昌平区102209 [4]南京南瑞继保电气有限公司,江苏省南京市211102

出　　处：《中国电机工程学报》2021年第2期514-523,共10页Proceedings of the CSEE

摘　　要：混合级联型直流输电技术兼具传统直流输电和柔性直流输电的优点,有效扩展了直流输电系统的适用范围,必将成为未来大规模、远距离、大容量输电的一个发展方向。该文针对该系统运行中故障态存在的过压等特殊工况,首次提出一种大容量可控自恢复消能装置来提升系统暂态特性,所提方案具有运行过程中不产生谐波、控制策略相对简单和可耐受大电流冲击等优点。相对于斩波型电阻消能装置,该装置具有成本低、电压/电流变化率低、电磁兼容(excellent electromagnetic compatibility,EMC)性能好等显著优势。电磁暂态仿真结果表明所提方案可有效解决混合直流输电系统中的直流过压难题,提升直流系统运行可靠性。Multi-infeed cascaded hybrid series-connected DC transmission technology combines the advantages of line commutated converters and voltage sourced converters. Hybrid DC transmission is expected to play an important role in future power transmission systems. Aiming at the special operating conditions such as over-voltage in the operation of this system, this paper proposed a large-capacity new controllable and adaptive energy absorption device to improve the transient characteristics of a hybrid HVDC system for the first time. This novel device generates no harmonic voltage during its operation, the C&P strategy adopted is simple and this device could withstand high current. Compared to chopper-based resistance braking equipment, the proposed equipment has some significant advantages, including low cost, low change rate of voltage\current, excellent electromagnetic compatibility(EMC) performance and etc. The simulation results show that the device can effectively solve the DC overvoltage problem in hybrid DC transmission systems and improve the reliability of DC system.

关 键 词：高压直流输电技术 常规直流输电 柔性直流输电 混合直流输电 消能装置 避雷器 

分 类 号：TM614[电气工程—电力系统及自动化]