摘要
可控串补(thyristor controlled series compensator,TCSC)对次同步振荡(subsynchronous oscillation,SSO)的阻尼作用受到多种因素的影响,其相关研究也结论不一。因此仅依靠TCSC自身特性来抑制SSO,其效果有待以后更进一步的研究。目前有必要从主动抑制的方向出发,研究TCSC的次同步振荡附加阻尼控制,为SSO的抑制提供更可靠的保障。基于机电扭振互作用的机制,对抑制SSO的原理进行分析,提出一种基于相位补偿原理的TCSC次同步振荡附加阻尼控制方法。针对某一实际串补系统,基于动态相量法对其建模,通过小干扰稳定分析,比较TCSC附加阻尼控制加入前后的模态阻尼比。分析结果表明:在该控制下,系统阻尼增强,并在各模态扭振频率下均呈现正阻尼,时域仿真也验证了控制的有效性。
The damping effect of thyristor controlled series compensator （TCSC） on subsynchronous oscillation （SSO） is affected by various factors and the conclusions of relevant reported researches differ from one another, so the effect on suppressing SSO only by its own characteristics of TCSC should be further researched later. At present it is necessary to research supplementary damping control of TCSC for SSO suppression in the viewpoint of active suppression means to offer more reliable ensurement for the suppression of SSO. Based on the mechanism of torsional interaction the principle of suppressing SSO is further analyzed, and a phase compensation principle based supplementary damping control method of TCSC for SSO suppression is proposed. Based on dynamic phasor method a certain practical series compensation system is modeled and by means of small signal stability analysis the modal damping ratios before and after the adoption of designed supplementary damping control of TCSC are compared. The results show that using designed supplementary damping control, the system damping increases greatly and is positive at all torsional mode frequencies. The effectiveness of the designed supplementary damping control is also verified by time-domain simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2010年第10期65-70,共6页
Power System Technology
关键词
可控串补
次同步振荡
附加阻尼控制
机电扭振互作用
相位补偿
thyristor controlled series compensator （TCSC）
subsynchronous oscillation （SSO）
supplementary damping control
torsional interaction
phase compensation
