750 kV交流输电线路架空地线感应取电研究

Study on electrical technology of the ground electrode overhead from 750 kV AC transmission line

通过对750 kV交流输电线路架空地线上的感应电进行研究,提出了一种架空地线感应取电电源方式,用于给在线监测装置提供用电,满足现有的输电线路在线监测装置电源无法满足稳定供电的要求。对架空地线可采用PT型取电和CT型取电两种方式进行分析,分析研究了两种取电方式的取电原理和电路图,并对两种取电方式的各个模块进行了具体分析,最后进行了现场实验,并将理论数据和实际数据进行对比分析,结果表明,所提方案在实际运用中具有稳定性、可靠性和有效性。

This paper does research on the faradism of overhead ground wire of 750 kV AC transmission line and put forward an inductive power supply way for overhead ground wire to provide electricity for online monitoring device and meet the loss of stable power supply of current transmission line on-line monitoring device power supply. In this paper, two kinds of power supply modes which are PT type and CT type for overhead ground wire are analyzed, Analyzing and studying the principle and circuit diagram of the two modes and analyzing each module of the two modes in detail, Finally, the field experiment is carried out, and the theoretical data and the actual data are compared and analyzed, The results show the stability, reliability and effectiveness of the proposed scheme in practical application.