高压交流输电线路故障检修技术研究

对高压交流输电线路故障检修技术进行研究,可以提高电力质量,减少因线路故障产生的一系列人财有损情况的发生。当前方法将短期的输电线路检修当作单重不确定性的优化问题,对其进行建模以及求解。而在现场运行过程中,架空线路可靠性指标不能准确表达线路故障发生的可能性,其理论基础相对薄弱,仅考虑了单重不确定性的问题,无法对高压交流输电线路进行高精度地检修。为此,提出一种基于层次分析的高压交流输电线路故障检修方法。该方法先将高压交流输电线路故障划分为：单相接地故障、高压交流输电线路短路故障、高压交流输电线路导线断路故障。然后利用多个电流测量点,通过FFT程序对电流故障分量相位进行求解,根据比较相邻测点相位差判别故障区域,最后利用图论实现高压交流输电线路故障检修时间控制函数,以及线路故障检修经济控制目标函数的制定,与分类和定位结果结合完成高压交流输电线路故障的检修。实验结果证明,所提方法可以有效地对高压交流输电线路故障进行检修,具有一定的利用价值。

Technical Research on High Voltage ac Transmission Line Fault Repair

Study of the high voltage ac transmission line troubleshooting technology, can improve the quality of electric power, reduce line fault generated by a series of goods damage situation. The current method is to model and solve the short-term transmission line maintenance as a single, uncertain optimization problem. And in the process of field operation, overhead line reliability index can''t accurately express the possibility of line fault occurs, its theoretical basis is relatively weak, only considers the single heavy uncertainty problems, unable to maintenance of high voltage transmission line accurately. In this paper, a method of fault repair of high voltage ac transmission line based on hierarchical analysis is proposed. This method first high voltage transmission line fault is divided into:single phase grounding fault, the high voltage ac transmission line fault, the high voltage ac transmission line conductor circuit malfunction. Then using multiple current measurement point, the current fault component of phase is solved by FFT program, according to comparing adjacent phase difference measuring point judging fault zone, the high voltage ac transmission line is realized by using the graph theory troubleshooting time control function, and the line troubleshooting economic control objective function is formulated, and classification and locating results combined with complete for the maintenance of high voltage transmission line fault. The experimental results show that the proposed method can effectively repair the failure of high-voltage ac power transmission line, and it has certain utilization value.