摘要
随着大规模风电基地的逐渐形成,风电需要与火电打捆后经过远距离输送到负荷中心。风火打捆高压远距离接入电网系统中,必然会改变系统的阻尼特性。电力系统稳定器(PSS)和静止同步串联补偿器(SSSC)附加阻尼控制可以提高电网系统的阻尼特性。为了研究风火打捆高压输电系统的暂态稳定性,以及PSS和SSSC附加广域阻尼控制对风火打捆输电系统阻尼特性的增强作用,分别建立了风火打捆输电系统模型,PSS模型、SSSC广域阻尼控制器模型。通过时域仿真分析,表明风火打捆输电系统的阻尼特性较弱;通过在系统中装设PSS和SSSC广域阻尼控制器,能有效抑制由于输电区域的扰动而导致的低频振荡,系统阻尼大大增加。
With the gradual development of the large-scale wind power base, wind power needs to be combined with thermal power to be sent to the load center through long-distance transport. Wind ＆ thermal power connecting to grid-system through long-distance and high-voltage transmission line will inevitably change the damping characteristics of the system. In order to study transient stability of wind ＆ thermal power transmission system as well as the enhancement of the system damping after using power system stabilizer and SSSC wide-area damping controller, this study establishes a model of wind ＆ thermal power transmission system, a model of power system stabilizer, and a model of SSSC wide-area damping controller. The time-domain simulation shows that the system has weak damping. The system damping can be greatly increased by installing power system stabilizer and SSSC wide-area damping controller. Also, the low-frequency oscillations caused by disturbance in the transmission line is effectively suppressed.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第19期61-65,71,共6页
Power System Protection and Control
基金
电力系统国家重点实验室重点开放课题(SKLD10KZ04)
山西省自然科学基金项目(2009011021-2)
