CN111641184B - Method for identifying self-loop of device and on-site device - Google Patents

Abstract

The invention relates to a method for identifying the self-loop of a device and a localization device. The random number function is used to generate a random number, and the random number is sent to the opposite side through a pilot fiber channel. When the received random number and the pilot fiber channel number When it is consistent with the sent random number and the pilot fiber channel number, it is determined that the channel is self-looping. Send the identification code of the device's local side to the opposite side through the longitudinal fiber channel. When the identification code of the opposite side received by the channel is consistent with the identification code of the local side, and the identification code of the local side set by the device is consistent with the identification code of the opposite side, it is determined that It is the self-looping of the setting. Only when the self-looping of the channel and the self-tuning of the setting are satisfied, it is determined that the self-looping of the device is in the state of the self-looping of the device. The present invention determines the self-loop through the combination of the channel self-loop and the setting self-loop, thereby avoiding misjudgment. The random number is generated, and the channel self-loop determination is performed by the random number and the pilot fiber channel number, which is easy to implement and has high efficiency.

Description

A method and localization device for identifying device self-loop

technical field

The invention relates to the technical field of relay protection, in particular to a method for identifying a self-loop of a device and a localization device.

Background technique

At present, differential protection has many advantages such as high sensitivity, simplicity and reliability, and fast action speed, so it is widely used in localized line protection devices.

The device self-loop refers to a single localized line protection device, the transmission and reception of the channel are connected, and the identification code of the device and the identification code of the opposite side are set the same.

In practical applications, two localized line protection devices are interconnected, and each device has a device identification code. Under normal circumstances, the identification codes of the two devices will be inconsistent; because the logic of the previous channel self-loop determination only needs to determine the receiving Whether the received pilot fiber channel number and the sent pilot fiber channel number are consistent, if the two devices are interconnected, as shown in Figure 1 below, and the identification codes of the devices on both sides are set the same, it will be misjudged as a device Self-loop, open differential protection, causing differential protection to malfunction.

It is a technical problem to be solved urgently in the art when the identification code of the local side and the identification code of the opposite side are set to be identical.

SUMMARY OF THE INVENTION

In order to avoid the misjudgment of the device self-loop, the present invention provides a method for identifying the device self-loop and an on-site device, which adopts a function of generating random numbers, and sends the random number to the opposite side through the pilot fiber channel. When the random number and the pilot fiber channel number are the same as the random number sent and the pilot fiber channel number, it is determined that the channel is self-looping. Send the device's local identification code to the opposite side through the longitudinal fiber channel. When the opposite-side identification code received by the channel is consistent with the local-side identification code, and the device-set local-side identification code is consistent with the opposite-side identification code, it is determined that It is the self-looping of the setting. Only when the self-looping of the channel and the self-setting of the setting are satisfied, it is judged that the self-looping of the device is in the state of the self-looping of the device.

In order to achieve the above object, the present invention provides a method for identifying the self-loop state of the device, including:

(1) generating a random number, and sending the random number and the pilot fiber channel number to the opposite side through the pilot fiber channel;

(2) Compare the received random number and the pilot fiber channel number with the sent random number and the pilot fiber channel number, and if they are consistent, it is judged that the channel is self-looping;

(3) Set the identification code of the identification device on the local side and the identification code of the opposite side, and send the identification code of the local side to the opposite side through the longitudinal fiber channel;

(4) Compare the received identification code of the opposite side with the identification code of the local side. If they are consistent and the identification code of the local side and the identification code of the opposite side set by the identification device are consistent, it is determined that the self-loop is set; When the loops are satisfied at the same time, it is judged that the device is self-looping; otherwise, it is judged that no self-looping occurs, and the process returns to step (1).

Further, it is judged that no self-loop occurs, and the differential protection is blocked after the identification process is completed.

Further, it is judged that the device opens the differential protection after self-looping.

Another aspect of the present invention provides a localization device for identifying the self-loop state of the device, including a random number generation module, a sending module, a receiving module and a main control module;

The random number generating module generates random numbers under the control of the main control module;

The sending module sends the generated random number and the pilot fiber channel number to the receiving module of the opposite localization device through the pilot fiber channel under the control of the main control module; The receiving module of the opposite side localization device;

The receiving module receives the random number and the pilot fiber channel number sent by the sending module of the opposite localization device and sends it to the main control module; receives the identification code sent by the sending module of the opposite localization device and sends it to the main control module ;

The main control module controls the random number generating module to generate random numbers, and the sending module sends the random number and the pilot fiber channel number; receives the random number and the pilot fiber channel number sent by the sending module of the opposite localization device , and make a judgment, if it is consistent with the random number sent by the sending module and the pilot fiber channel number, it is judged that the channel is self-looping; when it is judged that the channel is self-looping, the sending module is controlled to send the identification code; The identification codes are compared. If they are consistent, it is further judged that the set identification code of the local side is consistent with the identification code of the opposite side. If they are consistent, it is determined that the self-looping is set. When the self-looping of the channel and the looping of the setting are satisfied at the same time, it is judged that the device is self-looping; Otherwise, it is judged that no self-loop occurs, and the identification process is ended.

Further, the main control module controls to lock the differential protection after determining that no self-loop occurs, and controls to open the differential protection after determining that the device is self-looped.

The above-mentioned technical scheme of the present invention has the following beneficial technical effects:

(1) The present invention determines the self-loop through the combination of the channel self-loop and the setting self-loop, so as to avoid misjudgment.

(2) The present invention adopts the generation of random numbers, and determines the self-loop of the channel through the random number and the channel number, and performs double judgment to make the self-loop judgment more reliable; it is impossible to judge which longitudinal fiber channel is self-looped by using the random number alone. After the channel number is added, which one is the pilot channel of the self-loop can be determined. This judgment method is easy to implement and has high efficiency.

Description of drawings

Fig. 1 is a schematic diagram of device interconnection;

Fig. 2 is the self-loop judgment flow chart;

Figure 3 is a schematic structural diagram of a geochemical device.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

The invention relates to a self-looping method of an identification device and a localized device. When two localized line protection devices are interconnected, and the identification codes of the local side and the opposite side are set in the same way, they are not considered to be self-looping. state; and when the identification code of the device itself and the identification code of the opposite side are set the same, and the self-looping of the longitudinal fiber is considered to be a self-looping state. The random number generation function is used, and the random number is sent to the opposite side through the longitudinal fiber channel. When the received random number and channel number are consistent with the sent random number and channel number, it is considered that the channel is self-looping. Send the device's local identification code to the opposite side through the longitudinal fiber channel. When the opposite-side identification code received by the channel is consistent with the local identification code, and the local identification code set by the device is consistent with the opposite side identification code, it is considered that It is the setting self-loop. Only when the channel self-loop and the setting self-loop are satisfied, the device is considered to be in the self-loop state and the differential protection is opened. Otherwise, the identification codes on both sides are considered inconsistent and the differential protection is blocked.

One aspect of the present invention provides a method for identifying a self-loop state of a device, as shown in FIG. 2 , comprising the following steps:

(1) Use a function to generate a random number, and send the random number and the pilot fiber channel number to the opposite side through the pilot fiber channel; for example, the protection device has 2 pairs of pilot fiber channels; the channel numbers 0 and 1 are used to distinguish 2 A longitudinal Fibre Channel.

(2) Compare the received random number and the pilot fiber channel number with the random number and channel number sent by itself. If they are consistent, it is determined that the channel is self-looping; if they are inconsistent, it is determined that no self-looping has occurred, and the identification process is ended;

(3) Set the identification code of the device itself and the identification code of the opposite side, and send the identification code of the local side to the opposite side through the longitudinal fiber channel;

(4) Compare the received identification code of the opposite side with the identification code of the local side. If they are consistent and the identification code of the local side set by the device is consistent with the identification code of the opposite side, it is determined that the self-loop is set. When satisfied, it is determined that the device is self-looping, and an alarm prompt is issued; otherwise, it is determined that no self-looping has occurred, and the process returns to step (1) to continue monitoring. The device has the identification code of the side and the identification code of the opposite side, which must be set to be consistent, and the identification code is a number. If the two devices are interconnected, the received identification code is inconsistent with the opposite side identification code set on the local side.

It is determined that no self-loop occurs, and after the identification process is completed, the differential protection is blocked. It is determined that the differential protection is opened after the device has self-looped.

One aspect of the present invention provides an in-place device for identifying the self-loop state of a device. Referring to FIG. 3 , it includes a random number generating module, a sending module, a receiving module and a main control module.

The random number generating module generates random numbers under the control of the main control module;

Under the control of the main control module, the sending module sends the generated random number and channel number to the receiving module of the opposite side localization device through the longitudinal fiber channel; The receiving module of the geochemical device;

The receiving module receives the random number and channel number sent by the sending module of the opposite localization device and sends them to the main control module; receives the identification code sent by the sending module of the opposite localization device and sends it to the main control module;

The main control module controls the random number generating module to generate random numbers, and the sending module sends the random number and the pilot fiber channel number; receives the random number and the pilot fiber channel number sent by the sending module of the opposite localization device , and make a judgment, if it is consistent with the random number sent by the sending module and the pilot fiber channel number, it is judged that the channel is self-looping; when it is judged that the channel is self-looping, the sending module is controlled to send the identification code; The identification codes are compared. If they are consistent, it is further determined that the set identification code of the local side is consistent with the identification code of the opposite side. If they are consistent, it is determined that the self-looping is set. When the self-looping of the channel and the self-tuning of the setting are satisfied at the same time, it is determined that the self-looping is the device; If it is determined that no self-loop occurs, the identification process is ended, and the differential protection is controlled to be blocked. After determining that the device is self-looped, the differential protection is controlled to be opened.

To sum up, the present invention relates to a method for identifying the self-loop of a device and a localization device, which adopts a function of generating random numbers, and sends the random number to the opposite side through a longitudinal fiber channel. When the received random number, When the channel number is consistent with the random number sent and the pilot fiber channel number, it is determined that the channel is self-looping. Send the device's local identification code to the opposite side through the longitudinal fiber channel. When the opposite-side identification code received by the channel is consistent with the local-side identification code, and the device-set local-side identification code is consistent with the opposite-side identification code, it is determined that It is the self-looping of the setting. Only when the self-looping of the channel and the self-setting of the setting are satisfied, it is judged that the self-looping of the device is in the state of the self-looping of the device. The present invention determines the self-loop through the combination of the channel self-loop and the setting self-loop, thereby avoiding misjudgment. The random number is generated, and the channel self-loop judgment is performed by the random number and the channel number, which is easy to implement and has high efficiency.

It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Claims (5)

1. A method of identifying a self-loop status of a device, comprising:

(1) generating a random number, and sending the random number and the number of the longitudinal optical fiber channel to the opposite side through the longitudinal optical fiber channel;

(2) comparing the received random number and the pilot optical fiber channel number with the sent random number and the pilot optical fiber channel number, and judging that the channel is self-loop if the random number and the pilot optical fiber channel number are consistent;

(3) setting a local side identification code and an opposite side identification code of the identification device, and sending the local side identification code to the opposite side through a pilot optical fiber channel;

(4) comparing the received opposite side identification code with the local side identification code, and judging that the identification device is a setting self-loop if the received opposite side identification code and the local side identification code are consistent and the local side identification code and the opposite side identification code which are set by the identification device are consistent; when the channel self-loop and the setting self-loop are simultaneously satisfied, judging that the device is the self-loop; otherwise, judging that no self-loop occurs, and returning to the step (1).

2. The method for identifying the self-loop status of a device according to claim 1, wherein the differential protection is locked after the identification process is finished if the self-loop is determined not to occur.

3. The method for identifying the self-loop status of a device according to claim 1 or 2, wherein the differential protection is opened after the self-loop of the device is judged.

4. A local device for identifying the self-loop state of a device is characterized by comprising a random number generation module, a sending module, a receiving module and a main control module;

the random number generation module generates a random number under the control of the main control module;

the sending module sends the generated random number and the number of the pilot fiber channel to a receiving module of the opposite-side in-place device through the pilot fiber channel under the control of the main control module; sending the identification code to a receiving module of the opposite side in-situ device under the control of the main control module;

the receiving module receives the random number and the tandem fiber channel number sent by the opposite-side in-situ device sending module and sends the random number and the tandem fiber channel number to the main control module; receiving the identification code sent by the opposite-side local device sending module and sending the identification code to the main control module;

the main control module controls the random number generation module to generate a random number, and the sending module sends the random number and the pilot fiber channel number; receiving the random number and the tandem fiber channel number sent by the opposite-side in-situ device sending module, judging, and judging that the channel is a channel self-loop if the random number and the tandem fiber channel number sent by the sending module are consistent; when the channel is judged to be self-looped, the sending module is controlled to send the identification code; comparing the received identification code with the transmitted identification code, if the received identification code is consistent with the transmitted identification code, further judging that the set local identification code is consistent with the set opposite identification code, if the local identification code is consistent with the set opposite identification code, judging that the self-loop is set, and when the channel self-loop and the set self-loop are simultaneously satisfied, judging that the self-loop is the device self-loop; otherwise, judging that no self-loop occurs, and ending the identification process.

5. The apparatus of claim 4, wherein the main control module controls to lock the differential protection if it is determined that the loop does not occur, and controls to open the differential protection if it is determined that the apparatus is looped.

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