阅读说明：本技术 一种检测高压开关柜小车动、静触头接触状态的方法 (Method for detecting contact state of moving contact and fixed contact of high-voltage switch cabinet trolley ) 是由 闫晓霞 陈洪泽 于 2021-08-06 设计创作，主要内容包括：本发明设计一种检测高压开关柜小车动、静触头接触状态的方法,在开关柜箱体内高压母线上装有开关柜静触头,高压开关柜小车本体后端装有动触头,设计实施方法为：将高压母线停电,当高压开关柜小车摇至初始工作位置时,在开关柜箱体地面上画一条与高压开关柜小车前挡板对应的初始标示线；将高压开关柜小车摇出开关柜箱体,通过测量距离判断高压开关柜小车在标示线位置时,动触头与静触头接触情况；采用本发明方法,操作人员检查开关位置更为直观,并且能有效的消除开关摇不到位的隐患；可对开关状态智能操控仪状态显示的准确性进行验证；可在利用机组母线清扫时进行,步骤简单易操作。(The invention designs a method for detecting the contact state of a moving contact and a fixed contact of a high-voltage switch cabinet trolley, wherein the fixed contact of the switch cabinet is arranged on a high-voltage bus in a box body of the switch cabinet, the moving contact is arranged at the rear end of a trolley body of the high-voltage switch cabinet, and the design implementation method comprises the following steps: the high-voltage bus is powered off, and when the high-voltage switch cabinet trolley is swung to an initial working position, an initial marking line corresponding to a front baffle of the high-voltage switch cabinet trolley is drawn on the ground of a switch cabinet box body; the trolley of the high-voltage switch cabinet is shaken out of the box body of the switch cabinet, and the contact condition of a moving contact and a static contact when the trolley of the high-voltage switch cabinet is at the position of a marking line is judged through measuring the distance; by adopting the method, the operator can check the position of the switch more intuitively, and the hidden danger that the switch cannot be shaken is effectively eliminated; the accuracy of state display of the intelligent switch state control instrument can be verified; the method can be carried out when a unit bus is used for cleaning, and the steps are simple and easy to operate.)

1. A method for detecting the contact state of a moving contact and a fixed contact of a high-voltage switch cabinet trolley is characterized in that the fixed contact of the switch cabinet is arranged on a high-voltage bus in a switch cabinet body, and the moving contact is arranged at the rear end of a trolley body of the high-voltage switch cabinet, and the method comprises the following steps:

s1, the high-voltage bus is powered off, and when the high-voltage switch cabinet trolley is swung to an initial working position, an initial marking line corresponding to a front baffle of the high-voltage switch cabinet trolley is drawn on the ground of the switch cabinet box body;

s2, shaking the high-voltage switch cabinet trolley out of the switch cabinet body, and judging the contact condition of the moving contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line through measuring the distance;

s3, if the moving contact is judged to be in complete contact with the static contact, marking the marking line with a conspicuous color and keeping the marking line for a long time; and if the movable contact is not completely contacted with the fixed contact by judgment, checking whether the whole high-voltage switch cabinet trolley is inclined or not or whether the movable contact is not in a correct position, adjusting the trolley according to specific reasons, swinging the high-voltage switch cabinet trolley to a working position again after adjusting the trolley, making a marking line on the ground of the switch cabinet body again, and repeating the steps S2 and S3.

2. The method as claimed in claim 1, wherein the high voltage switch cabinet trolley is electrically connected to the intelligent switch state controller, and in step S1, when a display lamp on the intelligent switch state controller is turned on, the current position of the high voltage switch cabinet trolley is an initial operating position.

3. The method for detecting the contact state of the moving contact and the fixed contact of the high-voltage switch cabinet trolley as claimed in claim 1, wherein in S2, the length from the front baffle of the high-voltage switch cabinet trolley to the front end of the moving contact is measured and recorded as a; measuring the vertical distance from the marking line to a high-voltage bus where the static contact is located in the switch cabinet body, marking as b, and comparing the sizes of a and b to judge the contact condition of the movable contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line; if a is b, the moving contact is completely contacted with the fixed contact; if a < b, it means that the moving contact is not in complete contact with the fixed contact.

4. The method for detecting the contact state of the moving contact and the fixed contact of the high-voltage switch cabinet trolley according to claim 1, wherein the high-voltage switch cabinet trolley is a 10kV high-voltage switch cabinet trolley or a 6kV high-voltage switch cabinet trolley.

Technical Field

The invention relates to the technical field of switch cabinet power systems, in particular to a method for detecting contact states of moving and static contacts of a trolley of a high-voltage switch cabinet.

Background

In an industrial power system of a power plant, a 10KV (6KV) high-voltage trolley switch is widely used. The high-voltage trolley switch needs to frequently perform power-off and power-on operations in the production process. Because the back cabinet door of the switch cabinet body adopts a totally closed structure, the condition of one-time plug contact of the switch cabinet body can not be visually checked in the power transmission process, and whether the switch cabinet body is shaken to a working position or not is judged only through light of an intelligent control instrument on the switch cabinet.

In the power transmission process of a 10KV (6KV) high-voltage trolley switch, the following hidden dangers exist in the method of judging the position by only adopting a single intelligent control instrument light: when displacement or high-voltage trolley switch body slope appear in the internal limit switch of cabinet, can take place "intelligent control appearance" light and can not truly reflect the condition of trolley switch actual position, when the trolley switch not shaken completely to "work" position, can cause once plug contact failure, develop into the contact and generate heat in the operation, take place the contact short circuit even, the serious consequence of high-voltage bus decompression.

Disclosure of Invention

In order to solve the problems, the invention provides a method for detecting the contact state of a moving contact and a fixed contact of a high-voltage switch cabinet trolley, which is reasonable in design, overcomes the defects of the prior art and has a good effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for detecting the contact state of a moving contact and a fixed contact of a high-voltage switch cabinet trolley is characterized in that the fixed contact of the switch cabinet is arranged on a high-voltage bus in a switch cabinet box body, and the moving contact is arranged at the rear end of a high-voltage switch cabinet trolley body, and comprises the following steps:

s1, the high-voltage bus is powered off, and when the high-voltage switch cabinet trolley is swung to an initial working position, an initial marking line corresponding to a front baffle of the high-voltage switch cabinet trolley is drawn on the ground of the switch cabinet box body;

s2, shaking the high-voltage switch cabinet trolley out of the switch cabinet body, and judging the contact condition of the moving contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line through measuring the distance;

s3, if the moving contact is judged to be in complete contact with the static contact, marking the marking line with a conspicuous color and keeping the marking line for a long time; and if the movable contact is not completely contacted with the fixed contact by judgment, checking whether the whole high-voltage switch cabinet trolley is inclined or not or whether the movable contact is not in a correct position, adjusting the trolley according to specific reasons, swinging the high-voltage switch cabinet trolley to a working position again after adjusting the trolley, making a marking line on the ground of the switch cabinet body again, and repeating the steps S2 and S3.

Further, the high voltage switch cabinet trolley is electrically connected with the intelligent switch state controller, and in step S1, when the display lamp on the intelligent switch state controller is turned on, the current position of the high voltage switch cabinet trolley is the initial working position.

Further, in S2, measuring the length from a front baffle of the high-voltage switch cabinet trolley to the front end of the movable contact, and recording as a; measuring the vertical distance from the marking line to a high-voltage bus where the static contact is located in the switch cabinet body, marking as b, and comparing the sizes of a and b to judge the contact condition of the movable contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line; if a is b, the moving contact is completely contacted with the fixed contact; if a < b, it means that the moving contact is not in complete contact with the fixed contact.

Further, the high-voltage switch cabinet trolley is a 10kV high-voltage switch cabinet trolley or a 6kV high-voltage switch cabinet trolley.

The invention has the following beneficial technical effects:

by adopting the method, the operator can check the position of the switch more intuitively, and the hidden danger that the switch cannot be shaken is effectively eliminated; the accuracy of state display of the intelligent switch state control instrument can be verified; the method can be carried out when a unit bus is used for cleaning, the steps are simple and easy to operate, investment is basically not needed, and only a small amount of paint is needed for drawing lines.

Drawings

FIG. 1 is a schematic view of a high voltage switchgear cart according to an embodiment of the present invention;

Detailed Description

To facilitate understanding and practice of the invention by those of ordinary skill in the art, embodiments of the invention are further described below with reference to the accompanying drawings and specific examples:

as shown in fig. 1, a method for detecting the contact state of a moving contact and a fixed contact of a high-voltage switch cabinet trolley, the fixed contact of the switch cabinet is installed on a high-voltage bus in a switch cabinet body, and the moving contact is installed at the rear end of a high-voltage switch cabinet trolley body, the design implementation comprises the following steps:

s1, the 10kV or 6kV high-voltage bus is powered off, and when the high-voltage switch cabinet trolley is swung to an initial working position, an initial marking line corresponding to a front baffle of the high-voltage switch cabinet trolley is drawn on the ground of the switch cabinet box body;

specifically, the high-voltage switch cabinet trolley is electrically connected with the intelligent on-off control instrument, and when a display lamp on the intelligent on-off control instrument is lightened, the position of the high-voltage switch cabinet trolley at the moment is an initial working position.

S2, shaking the high-voltage switch cabinet trolley out of the switch cabinet body, and judging the contact condition of the moving contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line through measuring the distance;

specifically, in S2, the length from the front baffle of the high voltage switch cabinet trolley to the front end of the movable contact is measured and recorded as a; measuring the vertical distance from the marking line to a high-voltage bus where the static contact is located in the switch cabinet body, marking as b, and comparing the sizes of a and b to judge the contact condition of the movable contact and the static contact when the high-voltage switch cabinet trolley is at the position of the marking line; if a is b, the moving contact is completely contacted with the fixed contact; if a < b, it means that the moving contact is not in complete contact with the fixed contact.

S3, if the moving contact is judged to be in complete contact with the static contact, marking the marking line with a conspicuous color and keeping the marking line for a long time; and if the movable contact is not completely contacted with the fixed contact by judgment, checking whether the whole high-voltage switch cabinet trolley is inclined or not or whether the movable contact is not in a correct position, adjusting the trolley according to specific reasons, swinging the high-voltage switch cabinet trolley to a working position again after adjusting the trolley, making a marking line on the ground of the switch cabinet body again, and repeating the steps S2 and S3.

Specifically, whether the cabinet body of the high-voltage switch cabinet trolley is inclined or not is judged by checking whether the high-voltage switch cabinet trolley is parallel to the marking line or not. The method of the invention simultaneously reserves the method of judging the position of the trolley switch by adopting the light of the intelligent control instrument, and the two judgment bases are simultaneously used, thereby eliminating the hidden trouble that the 10KV (6KV) high-voltage trolley switch is not delivered in place.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.