SVC与STATCOM在大容量输电通道上的应用比较

Comparison of application of SVC and STATCOM to large capacity transmission path of power system

静止无功补偿器(SVC)和静止同步补偿器(STATCOM)都是无功补偿的重要装置,在故障下的电压支撑、提高暂态稳定极限、阻尼功率振荡等方面对两者进行分析比较。仿真指出在输电通道上安装大容量无功补偿装置,单个节点上安装SVC和STATCOM对维持节点电压的能力一般,STATCOM好于SVC;在提高暂稳极限方面,STATCOM的效果好于SVC;在增强系统阻尼效果上,同容量的STATCOM明显优于SVC,同调节范围时两者阻尼控制效果基本一致;STATCOM响应速度高于SVC,但响应速度对控制效果影响不大。

Both SVC （Static Var Compensators） and STATCOM （Static synchronous Compensator） are important equipments of reactive compensation, which are comprehensively compared from the aspects of voltage supporting on fault, improving the transient stability limit, and damping low frequency oscillation. The simulation results show that when high capacity static reactive compensation device is placed on transmission path of electric power system and SVC and STATCOM are equipped on single nodes , firstly, SVC and STATCOM do not have excellent ability to support node voltage, but STATCOM does better than SVC; secondly, STATCOM is much better than SVC in improving the transient stability limit; thirdly, for controlling damping low frequency oscillation, STATCOM is superior to SVC as they have the same capacity, and performs similarly with SVC as the two have the same controllable scope. Lastly, dynamical response speed affects the control result little though STATCOM responses much faster than SVC.