带有直流输电系统的大型水轮发电机组的正负励磁系统稳态分析

THE ANALYSIS OF A LARGE .HYDRO-GENERATOR WITH A HVDC SYSTEM UNDER STEADY STATE

介绍了正负励磁系统；建立了大型水轮发电机组的带地方负荷接线方式下的稳态模型及高压直流输电系统（ＨＷ３Ｃ）的准稳态（ＱＳＳ）等值阻抗模型、正负励磁系统的派克模型以及发电机对长线充电的线路模型；分析了正负励磁系统对空载长线充电距离的影响和带有直流输电系统对发电机吸收无功能力和发电机运行的静态稳定性的影响．仿真结果表明，大型水轮发电机组装有正负励用系统，并采用直流输电系统向远距离输电具有很大的经济效益．

This paper introduced a Positive and Negative Excitor(PNE).The models, such as the steady-state model of the large hydro-generator with a HVDC line, the Quasi-Steady-State (QSS) model of the HVDC convertor, the park equations of the PNE and line model of the nonload line changed by the generator,are present. It is analyzed and researched that the relation between the permmitted distance Of the chargable line and exeirive current, the ability of the generator absorbing the reactive Power affected by the .HVDC system and the static stability of the generator with a HVDC system. The simulated results indicate that it is very economic if the large hydro-generater is equipted with a PNE and a HVDC system.