特高压半波长线路输电能力与暂态稳定影响因素

发布时间：2018-03-17 01:02

本文选题：半波长　切入点：自然功率　出处：《电网技术》2017年10期 　论文类型：期刊论文

【摘要】：近年来,在构建全球能源互联网的趋势下半波长输电技术再次得到关注。为研究特高压半波长输电系统的输电能力,搭建1000k V半波长输电系统模型,计算特高压半波长输电系统自然功率,给出输电能力研究的边界条件,分析半波长输电系统最严重故障点在不同开机方式下的漂移现象,从暂态稳定极限角度研究发电机参数、励磁系统模型、开机方式、继电保护动作时序、电压水平、受端短路容量和变压器短路电抗等因素对半波长输电系统输电能力的影响,并定量给出输电能力的影响范围。研究结果表明,输送距离3000km的1000k V半波长输电系统具有输送自然功率及以上功率的输电能力,除变压器短路电抗以外,其他因素对输电能力均有较大的影响。
[Abstract]:In recent years, half wavelength transmission technology has been paid more attention to in the trend of building global energy Internet. In order to study the transmission capacity of UHV half-wavelength transmission system, a 1000kV half-wavelength transmission system model is built. The natural power of UHV half-wavelength transmission system is calculated, the boundary condition of transmission capability research is given, the drift phenomenon of the most serious fault point of half-wavelength transmission system under different start-up modes is analyzed, and the generator parameters are studied from the angle of transient stability limit. The excitation system model, startup mode, relay protection operation sequence, voltage level, are affected by the terminal short-circuit capacity and transformer short-circuit reactance to the transmission capacity of half-wavelength transmission system. The research results show that the 1000kV half-wavelength transmission system with a distance of 3000km has the transmission capacity of transmitting natural power and above power, except for the short-circuit reactance of transformer. Other factors have great influence on the transmission capacity.
【作者单位】：中国电力科学研究院;
【分类号】：TM75

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