基于电磁瞬态过程的GIS隔离开关分合位置确认方法研究

Study on Opening and Closing Position Confirmation Method of GIS Disconnector Based on Electromagnetic Transient Process

GIS隔离开关在电力系统中扮演着重要角色,但分合闸不到位故障会威胁系统安全。传统的状态检测方法所反映的腔体内部信息有限,文中提出了一种基于电磁瞬态过程的新方法。利用在GIS隔离开关带电分合过程中产生的电磁瞬态信息,通过分析电磁瞬态信号的起止时间与开关动静触头位置关系,反演GIS隔离开关腔体内动静触头状态。同时,还提出了一种低采样频率下提取高频电磁瞬态信号特征的方法,并开发了相应的采集装置。不仅有效降低了数据采集量,同时可以成功确认GIS隔离开关的分合位置。最后通过实验证明了文中提出方法的有效性。

GIS disconnector plays a vital role in power system,but the problem of not opening and closing to the end will threaten safety of the system.The information inside the compartment which is reflected by the traditional status detection method is limited.In this paper,a new method based on electromagnetic transient processes is proposed.By utilizing the electromagnetic transient information generated during the opening and closing process of GIS disconenctor at live condition and through analyzing the relationship between the start and stop time of the electromagnetic transient signal and the position of the stationary and moving contacts of the disconnector,the status of the moving and the stationary contacts within the GIS disconnector compartment is inverted.At the same time,a method for extracting high-frequency electromagnetic transient signal features at a low sampling frequency is proposed,and corresponding acquisition device is developed.This method not only significantly reduces data collection requirements,but also successfully verifies the opening and closing positions of GIS disconnector.Finally,the effectiveness of the method proposed in this paper is verified by experiment.