Method and device for monitoring closing state of disconnecting link,equipment and storage medium

Abstract

The invention discloses a method and a device for monitoring the closing state of a disconnecting link, equipment and a storage medium. The method for monitoring the state of the disconnecting link comprises the following steps: after a set time when the disconnecting link begins to be electrified, acquiring a sample set of current when the disconnecting link is in a closing in-place state and a temperature rise value of contact temperature corresponding to the current relative to environment temperature; determining a function relationship between the current and the temperature rise value of the disconnecting link based on the sample set; monitoring the actual current after the set time when the disconnecting link begins to be electrified and the actual temperature rise value of the contact temperature corresponding to the actual current relative to the environment temperature; according to the sample set, the function relationship and the actual temperature rise value, determining an error allowable value of the temperature rise value corresponding to the actual current obtained based on the function relationship; and determining the closing state of the disconnecting link according to the relationship between the temperature rise value corresponding to the actual current obtained based on the function relationship, the error allowable value of the temperature rise value and the actual temperature rise value corresponding to the actual current. According to the scheme, the accuracy of monitoring the closing state of the disconnecting link can be improved.

Description

technical field [0001] The invention relates to the technical field of substations, in particular to a method, device, equipment and storage medium for monitoring the closing state of a knife switch. Background technique [0002] Knife switch (isolating switch) is a kind of power equipment switch. The opening and closing of the knife switch are the key points and dangerous points in the switching operation of power transformation operation. Whether the opening and closing is in place directly affects the power grid , equipment and personal safety. In recent years, the power grid and personal safety accidents caused by the failure of the opening and closing of the knife switch account for the vast majority of the safety accidents in the power grid operation. Generally speaking, the opening of the knife switch is usually easier to observe. Compared with the opening of the knife switch, due to the secrecy of the closing of the knife switch, it is often difficult to directly o...

AI Technical Summary

Problems solved by technology

[0003] At present, the monitoring of the closing state of the knife switch in the existing substation mainly relies on the experience of the operator to observe, and there are the following problems: 1) The operator mainly observes and judges the status of the limit screw and the opening and closing indicator ball, so that To determine the opening and closing status of the knife switch, the judgment result is greatly affected by the observation angle and the site environment; The state deviation of the switch is relatively small, and it is usually difficult for the operator to notice it obviously, and it is easy to misjudge the state of the knife switch; 3) The connecting rod equipment such as the limit screw and the opening and closing indicator ball are affected by the operating life of the equipment, and it is easy to produce Mechanical looseness may easily cause inaccurate status indication of the knife switch

Images