Disconnecting link opening and closing state double-confirmation method based on OCS system

Abstract

The invention discloses a disconnecting link opening and closing state double-confirmation method based on an OCS system, and belongs to the field of disconnecting links. A laser range finder continuously measures the distance to a disconnecting link cantilever, a second criterion of the disconnecting link opening and closing state can be formed based on geometry, a first criterion of the disconnecting link opening and closing state detected by an OCS system based on physics is combined, and the two criteria of different principles are compared to obtain the disconnecting link opening and closing state, namely the opening and closing state of the disconnecting link is finally judged by adopting a double-confirmation method. When one principle fails, the judgment result of the other principle is still in normal operation, and the reliability of the disconnecting link opening and closing state recognition result is improved.

Description

Technical Field

[0001] The present invention relates to the field of disconnecting switches, and particularly to a double - confirmation method for the opening and closing states of disconnecting switches based on the OCS system. Background Art

[0002] Disconnecting switch equipment is very important equipment in a substation. The operation of the disconnecting switch equipment is directly related to the stable operation of the substation and even the entire power grid. Therefore, after the operation of the disconnecting switch equipment, it is very important to accurately and timely check the state of the disconnecting switch equipment.

[0003] Existing methods for identifying the state of disconnecting switch equipment all perform single - confirmation or double - confirmation based on the same principle. For a confirmation method based on the same principle, if the principle fails under certain circumstances, then the identification results will all be invalid, and the reliability of the identification results of the disconnecting switch state cannot be guaranteed.

[0004] Therefore, how to ensure the reliability of the identification results of the disconnecting switch state is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] The purpose of the present invention is to provide a double - confirmation method for the opening and closing states of disconnecting switches based on the OCS system, which can improve the reliability of the identification results of the disconnecting switch state.

[0006] To achieve the above purpose, the present invention provides the following solution:

[0007] A double - confirmation method for the opening and closing states of disconnecting switches based on the OCS system includes:

[0008] After the OCS system sends a tripping command or a closing command to the disconnecting switch, continuously measure the distance to the disconnecting switch cantilever through a laser rangefinder;

[0009] If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, then it is determined that the disconnecting switch is in the tripping state or the closing state;

[0010] Compare the average value of the distances with a preset tripping - state distance reference value and a preset closing - state distance reference value respectively to determine a second criterion for the opening and closing state of the disconnecting switch;

[0011] The OCS system detects a first criterion for the opening and closing state of the disconnecting switch;

[0012] Compare the first criterion and the second criterion for the opening and closing state of the disconnecting switch;

[0013] If the first criterion and the second criterion are the same, then use the opening and closing state of the disconnecting switch determined by the first criterion or the second criterion as the final opening and closing state of the disconnecting switch;

[0014] If the first criterion and the second criterion are different, then issue an alarm.

[0015] A double - confirmation system for the opening and closing state of a knife - switch based on an OCS system, comprising: a laser rangefinder and an OCS system;

[0016] The laser emission end of the laser rangefinder is aligned with the knife - switch cantilever;

[0017] The signal output end of the OCS system is connected to the control end of the knife - switch, and the OCS system is used to send a tripping instruction or a closing instruction to the knife - switch;

[0018] The signal output end of the laser rangefinder is connected to the OCS system. The laser rangefinder is used to continuously measure the distance to the knife - switch cantilever. If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, it is determined that the knife - switch is in the tripping state or the closing state; the average value of the distances is respectively compared with a preset tripping - state distance reference value and a preset closing - state distance reference value to determine a second criterion for the opening and closing state of the knife - switch, and the second criterion is sent to the OCS system;

[0019] The OCS system is further used to detect a first criterion for forming the opening and closing state of the knife - switch, compare the first criterion and the second criterion of the knife - switch. If the first criterion and the second criterion are the same, the opening and closing state of the knife - switch judged by the first criterion or the second criterion is used as the final opening and closing state of the knife - switch; if the first criterion and the second criterion are different, an alarm is issued.

[0020] According to the specific embodiments provided by the present invention, the following technical effects are disclosed:

[0021] The present invention discloses a double - confirmation method for the opening and closing state of a knife - switch based on an OCS system. The laser rangefinder continuously measures the distance to the knife - switch cantilever. Based on geometry, a second criterion for the opening and closing state of the knife - switch can be formed. Combining with the first criterion for detecting the opening and closing state of the knife - switch by the OCS system based on physics, the opening and closing state of the knife - switch is obtained by comparing the two criteria with different principles, that is, the double - confirmation method is used to finally determine the opening and closing state of the knife - switch, which can ensure that when one principle fails, the judgment result of the other principle is still working properly, improving the reliability of the recognition result of the opening and closing state of the knife - switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1It is a flowchart of a double - confirmation method for the opening and closing states of a knife switch based on the OCS system provided by an embodiment of the present invention. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0026] Embodiment 1

[0027] As Figure 1 shown, an embodiment of the present invention provides a double - confirmation method for the opening and closing states of a knife switch based on the OCS system, including:

[0028] Step 1: After the OCS system sends a tripping command or a closing command to the knife switch, continuously measure the distance to the cantilever of the knife switch through a laser rangefinder.

[0029] OCS (operating control system) has the following two main functions: One is to send operation commands to devices, such as electric motors, and control the switches of electric motors through operation commands, eliminating the need for on - site manual operation of devices and preventing the danger of manual operation of devices. The other is the function of detecting the device state.

[0030] Step 2: If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, it is determined that the knife switch is in the tripping state or the closing state.

[0031] The principle of using a laser rangefinder to judge the opening and closing states of the knife switch is as follows: In the opening and closing states of the knife switch, the contact point positions are different. By measuring the distance from the contact point in the opening and closing states to a certain fixed distal position, the opening and closing states of the knife switch can be judged. Therefore, by using a laser rangefinder at a fixed position to measure the distance to the contact point in the opening and closing states of the knife switch, the opening and closing states of the knife switch can be judged; its principle is based on the principles of geometry.

[0032] During the process of the knife switch changing from the static tripping or closing state to the closing or tripping state, the distance values measured by the laser rangefinder are dynamically changing. To judge the tripping or closing state of the knife switch, it is first necessary to judge whether the knife switch is in a static state (tripping state or closing state).

[0033] Taking the continuous measurement of 10 distance values as an example, if the 10 distance values are the same, or the difference between the average distance value of the 10 times and each distance value is within the error range (within plus or minus 3 millimeters), it is determined that the disconnecting switch is in a static state.

[0034] Step 3: Compare the average distance value with the preset distance reference value in the open state and the distance reference value in the closed state of the disconnecting switch respectively to determine the second criterion for the open / closed state of the disconnecting switch.

[0035] The preset distance reference value in the open state and the distance reference value in the closed state are pre-measured values and have been pre-written in the laser rangefinder.

[0036] If the average distance value is equal to the preset distance reference value in the open state of the disconnecting switch, it indicates that the disconnecting switch is in the open state. If the average distance value is equal to the distance reference value in the closed state of the disconnecting switch, it indicates that the disconnecting switch is in the closed state.

[0037] Step 4: The OCS system detects and forms the first criterion for the open / closed state of the disconnecting switch.

[0038] The OCS system collects the electrical circuit signal in the power equipment through tele-signaling, thereby judging whether the electronic equipment is powered on. Its principle is based on physics.

[0039] The OCS system collects the electrical circuit signal of the disconnecting switch through tele-signaling; if the electrical circuit signal of the disconnecting switch is collected, it is judged that the disconnecting switch is powered on and the disconnecting switch is in the closed state; if the electrical circuit signal of the disconnecting switch is not collected, it is judged that the disconnecting switch is not powered on and the disconnecting switch is in the open state.

[0040] Step 5: Compare the first criterion and the second criterion for the open / closed state of the disconnecting switch.

[0041] Step 6: If the first criterion and the second criterion are the same, use the open / closed state of the disconnecting switch judged by the first criterion or the second criterion as the final open / closed state of the disconnecting switch.

[0042] After finally determining the open / closed state of the disconnecting switch, it indicates that the OCS system has successfully controlled the disconnecting switch, and the remaining instructions will be executed according to the established sequence later.

[0043] Step 7: If the first criterion and the second criterion are different, an alarm is issued.

[0044] After the alarm is issued, go to the site of the disconnecting switch manually or further check the open / closed state of the disconnecting switch through the image of the disconnecting switch collected by the camera.

[0045] Based on the above two different principles, determining the open / closed state of the disconnecting switch is the double-confirmation method; it can ensure that when one principle fails, the judgment result of the other principle is still working properly.

[0046] Example 2

[0047] The embodiment of the present invention provides a double - confirmation system for the opening and closing states of a knife - switch based on an OCS system, including: a laser rangefinder and an OCS system.

[0048] The laser emitting end of the laser rangefinder is aligned with the knife - switch cantilever. The signal output end of the OCS system is connected to the control end of the knife - switch, and the OCS system is used to send an opening command or a closing command to the knife - switch.

[0049] The signal output end of the laser rangefinder is connected to the OCS system. The laser rangefinder is used to continuously measure the distance to the knife - switch cantilever. If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, it is determined that the knife - switch is in the opening state or the closing state; the average value of the distances is respectively compared with a preset distance reference value for the opening state and a preset distance reference value for the closing state to determine a second criterion for the opening and closing state of the knife - switch, and the second criterion is sent to the OCS system.

[0050] The OCS system is further used to detect a first criterion for forming the opening and closing state of the knife - switch, compare the first criterion and the second criterion of the knife - switch. If the first criterion and the second criterion are the same, the opening and closing state of the knife - switch determined by the first criterion or the second criterion is used as the final opening and closing state of the knife - switch; if the first criterion and the second criterion are different, an alarm is issued.

[0051] Among them, the laser rangefinder is set at a fixed position.

[0052] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0053] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A double - confirmation method for the opening and closing state of a knife switch based on the OCS system, characterized in that, Including: After the OCS system sends a trip command or a close command to the disconnect switch, it continuously measures the distance to the disconnect switch cantilever through a laser rangefinder. If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, it is determined that the disconnect switch is in the open state or the closed state. Compare the average value of the distances with the preset distance reference values for the open state and the closed state respectively to determine the second criterion for the open / closed state of the disconnect switch. The OCS system detects the first criterion for forming the open / closed state of the disconnect switch. Compare the first criterion and the second criterion for the open / closed state of the disconnect switch. If the first criterion and the second criterion are the same, use the open / closed state of the disconnect switch determined by the first criterion or the second criterion as the final open / closed state of the disconnect switch. If the first criterion and the second criterion are different, an alarm is issued.

2. The double-confirmation method for the disconnector opening / closing state based on the OCS system according to claim 1, wherein The OCS system detects the first criterion for the open / closed state of the disconnect switch, specifically including: The OCS system collects the electrical circuit signal of the disconnect switch through telemetry signals. If the electrical circuit signal of the disconnect switch is collected, it is determined that the disconnect switch is energized and the disconnect switch is in the closed state. If the electrical circuit signal of the disconnect switch is not collected, it is determined that the disconnect switch is not energized and the disconnect switch is in the open state.

3. The double-confirmation method for the opening and closing states of the disconnecting switch based on the OCS system according to claim 1, wherein If the first criterion and the second criterion are the same, use the open / closed state of the disconnect switch determined by the first criterion or the second criterion as the final open / closed state of the disconnect switch. After that, it further includes: The OCS system determines that the opening / closing of the disconnect switch is successful and executes the remaining commands according to the specified sequence.

4. The double-confirmation method for the opening and closing states of a knife switch based on the OCS system according to claim 1, wherein If the first criterion and the second criterion are different, an alarm is issued. After that, it further includes: Go to the site of the disconnect switch or further check the open / closed state of the disconnect switch through the image of the disconnect switch collected by the camera.

5. A double-confirmation system for the opening and closing states of disconnecting switches based on the OCS system, characterized in that, Including: A laser rangefinder and an OCS system; The laser emission end of the laser rangefinder is aligned with the disconnect switch cantilever. The signal output end of the OCS system is connected to the control end of the disconnect switch, and the OCS system is used to send a trip command or a close command to the disconnect switch. The signal output end of the laser rangefinder is connected to the OCS system. The laser rangefinder is used to continuously measure the distance to the disconnect switch cantilever. If the distances measured continuously for multiple times are the same, or the difference between the average value of the distances measured continuously for multiple times and the distance measured each time is within a preset error range, it is determined that the disconnect switch is in the open state or the closed state. Compare the average value of the distances with the preset distance reference values for the open state and the closed state respectively to determine the second criterion for the open / closed state of the disconnect switch, and send the second criterion to the OCS system. The OCS system is also used to detect the first criterion for forming the open / closed state of the disconnect switch, compare the first criterion and the second criterion of the disconnect switch. If the first criterion and the second criterion are the same, use the open / closed state of the disconnect switch determined by the first criterion or the second criterion as the final open / closed state of the disconnect switch. If the first criterion and the second criterion are different, an alarm is issued.

6. The double-confirmation system for the opening and closing states of the knife switch based on the OCS system according to claim 5, characterized in that, The laser rangefinder is set at a fixed position.

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