摘要
高压直流输电系统的紧急功率支援可以提高系统的暂态稳定性,但支援数量、时间、速度等因素直接决定了支援效果。文中分析了故障后交直流系统运动特性,建立了交直流系统的广义动力学模型,通过冲量定理建立了紧急功率支援时间和支援数量与系统运动特性的关系,进而提出了基于广义动力学原理的高压直流输电紧急功率支援方法。并通过仿真验证该控制方法可有效地提高故障后交直流系统的稳定性。
Emergency DC power support （EDCPS） can enhance transient stability of AC / DC hybrid power systems, but the amount, duration, speed and other factors of the power support directly determine the result. In this paper, the post-fauh dynamic characteristics of AC/DC hybrid power systems are analyzed, the generalized dynamical models of the AC/DC hybrid power system are constructed, the relationship between the duration and the amount of the emer- gency power support and the dynamic characteristics of the system are established via the impulse theorem, then the emergency DC power support strategy on the basis of the principles of the generalized dynamics is proposed. Finally, it is verified by simulated examples that the strategy can effectively boost the post-fault stability of the AC and DC power systems.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2013年第6期50-54,共5页
Proceedings of the CSU-EPSA
基金
国家电网公司大电网重大专项资助项目(SGCC-MPLG001-2012)
关键词
高压直流输电
紧急直流功率支援
冲量定理
交直流系统
广义动力学
high voltage DC transmission （HVDC）
emergency DC power support （EDCPS）
impulse theorem
AC/DC hybrid power system
principles of the generalized dynamics
