影响多馈入高压直流换相失败的耦合导纳研究  

Study on Mutual Admittance and Commutation Failure for Multi-infeed HVDC Transmission Systems

作　　者：何朝荣[1] 李兴源[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065

出　　处：《中国电机工程学报》2008年第7期51-57,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50595412;50377017);国家重点基础研究专项经费项目(2004CB217907);南方电网技术研究中心项目~~

摘　　要：建立了2条交、直流并联的多馈入高压直流输电系统模型,并对此模型的直流输电线的耦合导纳和换相失败关系进行详细的理论分析研究。基于电路基本理论知识,推导出多馈入交、直流并联的高压直流输电系统耦合导纳和换相电压关系表达式。从该文的理论分析可看出逆变侧换相失败的判断与耦合导纳关系十分复杂,它不仅与各直流输电子系统逆变侧相连的交流电源的等值导纳有关,而且还与各直流输电子系统整流侧相连的交流电源的等值导纳有关,更与各直流输电子系统相并联的交流传输线导纳密切相关。A multi-infeed HVDC system model including AC/DC parallel lines was established, and the relation between its mutual admittance and converter commutation failure was analyzed. Based on electrical circuit theory, the formulation of the relation between mutual admittance and converter commutation voltage of the multi-infeed HVDC system was given. Study shows that the relationship is complex, which is not only related to the equivalent admittance of ac source at each inverter and converter ends, but also the admittance of the parallel ac lines.

关 键 词：高压直流输电 耦合导纳 换相失败 换相电压 

分 类 号：TM72[电气工程—电力系统及自动化]