电压源换流器直流输电提高系统频率和电压稳定  

VSC-HVDC for Enhancing the Power System Frequency and Voltage Stability in the Same Time

作　　者：郭丽[1] 

机构地区：[1]山西省电力勘测设计院,山西太原030001

出　　处：《山西电力》2009年第6期18-21,共4页Shanxi Electric Power

摘　　要：将基于电压源换流器高压直流输电系统(VSC-HVDC)引入到交流系统中,建立了含有VSC-HVDC的电力系统的仿真模型,导出了相应的数学模型,利用VSC-HVDC能同时对有功功率和无功功率进行快速控制的特点来提高系统频率和电压稳定性。利用仿真软件进行了仿真,结果表明在负荷恢复时采用VSC-HVDC与发电机协调控制比传统调频调压方法更有利于提高电网的恢复速度和稳定性。In this paper the mathematical and physical model of an AC system and VSC - HVDC system are developed and analyzed. Based on the characteristic of VSC- HVDC, which is it can control active and reactive power simultaneously. By using the simulation software PSCAD/EMTDC, simulation results show that VSC- HVDC has excellent dynamic characteristic. A new method based on a coordinated control of VSC - HVDC and AC governor is presented to improve the stability of AC/DC hybrid system, and the novel method has better characteristic than traditional method in restoration speed and stability.

关 键 词：VSC—HVDC 交流系统 负荷恢复 频率和电压稳定性 

分 类 号：TM721.1[电气工程—电力系统及自动化]