作　　者： ; ; ;

机构地区： 华南理工大学电力学院

出　　处： 《华南理工大学学报（自然科学版）》 2008年第6期127-132,共6页

摘　　要： 分析了紧急直流功率支援提高多机系统暂态稳定性的机理.通过在合适时刻投入紧急直流功率支援,在单机无穷大系统功角的前2次正摆过程中提升直流功率,在回摆过程中回降直流功率,以提高暂态稳定裕度,同时采用遗传禁忌优化算法对各调制参数进行优化.最终,在给定的具体运行方式下,根据事先设定的电网关键线路潮流或来自能量管理系统EMS的实时潮流数据和预想故障集,实现某些严重预想事故集的暂稳控制量的离线或在线计算.算例表明:所提出的紧急直流功率支援策略能有效地改善系统暂态稳定性. In this paper, the mechanism of the enhancement of transient stability of multi-machine systems by the emergency DC power support （EDCPS） is analyzed. Then, with a timely EDCPS, an appropriate DC power rise and the corresponding rising rate in the first two up-swing courses, and with a suitable drop and the corresponding dropping rate in the first two back-swing courses, the transient stability is well improved. Moreover, by using the genetic/taboo searching algorithm, the modulation parameters are well optimized. Thus, according to the pre-set key power flow or the real-time power flow as well as the preconceive accident sets in the energy management system, the transient stability parameters of some serious preconceive accident sets can be calculated off line or on line in a certain operation mode. Case study indicates that the proposed EDCPS strategy effectively improves the transient stability of the power system.

关 键 词： 交直流系统 紧急直流功率支援 功角稳定 电压稳定 优化控制

领　　域： [电气工程]