SVC/TCSC和HVDC之间交互影响分析

SVC和TCSC属于两种不同连接类型的FACTS装置,它们与HVDC系统之间可能的交互作用是人们所关心的。以3机9节点交直流系统作为试验系统,通过改变电气距离和直流传输功率,采用稳态的和动态的相对增益矩阵（RGA）方法分析串联型TCSC和HVDC、并联型SVC与HVDC两种交互影响,找出出现RGA峰值的系统敏感频率。研究结果表明,TCSC对直流功率的变化较为敏感;SVC/TCSC与HVDC交互影响随着电气距离的增大和直流传输功率的减小而减小。。

Analysis of the Interaction Between SVC/TCSC and HVDC

SVC and TCSC are two types of FACTS devices with different connections, and it is concerned that there may be interac- tion between SVC/TCSC and HVDC. Taking EEE 3-machine 9-bus AC/DC hybrid system as a test system, and adopting the steady- state and dynamic-state relative gain array （RGA） method, this paper analyzes the interaction between series TCSC and HVDC as well as that between the parallel SVC and HVDC under the conditions of various electrical distances and DC transmission powers, and finds out the FACTS sensitive frequency in which the RGA reaches a peak value. The results show that the TCSC device is more sensi- tive to the change of DC power. The interaction between SVC/TCSC and HVDC becomes weak as the electrical distance being large and the DC power decreasing.