摘要
特高压半波长交流输电是一项很有吸引力和前瞻性的远距离大容量输电技术,其稳态特性和暂态稳定研究是其可行性应用研究的基础。首先根据传输线和二端口理论推导出可用于潮流和稳定工程计算的特高压半波长交流线路的准稳态模型;然后在潮流计算的基础上,得出半波长线路的稳态运行特性,并从入、反射波与无功需求2个方面对其电压分布特性进行深入分析。在大量暂态稳定工程计算的基础上,提出特高压半波长交流输电系统的暂态稳定极限和输电能力,并研究最严重故障点和频率变化对系统暂态稳定极限的影响。研究成果对特高压半波长交流输电系统的可行性研究和未来试验工程的实施提供了有力的技术支撑。
Ultra high voltage（UHV） half-wave-length alternating current（AC） transmission technology is an attractive and promised technology for long-distance bulk power transmission.And the study on its steady state characteristic and transient stability is the foundation of its feasibility study.Firstly,the quasi-steady model of a half-wave-length AC transmission line which can be adopted in power flow and transient stability engineering calculation was deduced according to transmission line theory and two-port network theory.Secondly,on the foundation of power flow calculation,the steady state operation characteristic of UHV half-wave-length transmission lines was obtained,and the voltage distribution characteristic was analyzed thoroughly from the aspects of incident,reflected wave composition and reactive power demand.Thirdly,on the foundation of a great deal of transient stability calculation,the transient stability limit and transmission capability of UHV half-wave-length transmission lines was proposed,and the impact of the severest contingency point and the frequency variation on transient stability was investigated.The achievements of the paper provide the powerful technical supports for the feasibility research and the implementation of future testing project of UHV half-wave-length transmission system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第31期66-76,共11页
Proceedings of the CSEE
基金
国家电网公司科技项目(ZXT2010-029)~~
关键词
半波长
特高压
输电线路
准稳态
电压特性
暂态稳定
half-wave-length
ultra high voltage（UHV）
transmission lines
quasi-steady
voltage characteristic
transient stability
