电网技术2011，Vol.35Issue(3)：20-25,6.
1000kV交流同塔双回输电线路的电气特性仿真分析
Simulation Analysis on Electrical Characteristics of 1 000 kV AC Double-Circuit Transmission Lines on the Same Tower
杜丁香 1周泽昕 1李岩军 1李仲青1
作者信息
- 1. 中国电力科学研究院,北京市,海淀区,100192
- 折叠
摘要
Abstract
To analyze the influences of the 1 000 kV AC double-circuit transmission line on the same tower on the protective relayings, a simulation system is built in the real-time digital simulator to perform related simulative tests.The principal electrical characteristics of above-mentioned transmission line are compared with those of 1 000 kV AC single-circuit transmission line and those of 500 kV double-circuit transmission line on the same tower respectively.The analysis and comparison of following electrical characteristics in the above-mentioned three kinds of ultra high voltage AC transmission lines, i.e., the influence of mutual inductance, harmonic content, attenuation time of aperiodic component, charging current, restore voltage and current level under high resistance grounding fault, are performed. In the viewpoint of the influences on protective relayings, the electrical characteristics of 1 000 kV AC double-circuit transmission line on the same tower as well as its influences on protection devices are analyzed. The mutual inductance of 1 000 kV AC double-circuit transmission line on the sametower influences the accuracy of protection zone of grounding distance protection; the inter-harmonics in fault current and the attenuation time of aperiodic component influence the qnick-action ability of protective relaying; for high resistance grounding fault the decrease of fault current influences the sensitivity of protective relaying. Thus, the manufacturers of protective relayings should research these electrical characteristics in depth and improve their products.关键词
1000kV特高压输电/同塔双回/继电保护/电气特性Key words
1 000 kV ultra high voltage (UHV) power transmiasion/ double-circuit transmission line on the same tower/ protective relayings/ electrical characteristics分类
信息技术与安全科学引用本文复制引用
杜丁香,周泽昕,李岩军,李仲青..1000kV交流同塔双回输电线路的电气特性仿真分析[J].电网技术,2011,35(3):20-25,6.
