Reclosing charging state intelligent early warning method based on comparison of protection device kernel

Abstract

The application provides a reclosing charging state intelligent early warning method based on a protection device kernel comparison, which is configured on two protection devices of the same power transmission line to meet the dual principle, and the two protection devices realize double-end data interaction through a protection optical fiber channel. The method comprises the following steps: each protection device reads the locking flag and the reclosing charging state of the local side and packs them into a message to send to the opposite protection device; each protection device extracts the locking flag and the reclosing charging state of the opposite side from the message of the opposite protection device, compares the locking flags of the local side and the opposite side, judges whether comparison is needed, if needed, compares the reclosing charging states of the local side and the opposite side, and realizes intelligent early warning. The application is based on the natural double-end interaction characteristics of the point-to-point optical fiber channel of the line protection principle, directly realizes the consistency comparison of the reclosing charging states of the two sides through the protection device kernel, and realizes effective prevention and control of the reclosing omission and the functional implicit failure.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to an intelligent early warning method for reclosing charging status based on comparison of the core of a protection device. Background Technology

[0002] In the daily operation and maintenance of transmission lines, before carrying out line maintenance, protection debugging, device upgrades and secondary circuit verification, maintenance personnel must deactivate the line reclosing function as required (e.g., deactivate the reclosing pressure plate), and reactivate the line reclosing function (e.g., reactivate the reclosing pressure plate) after the maintenance work is completed and the line is restored to grid operation, so as to restore the fault reclosing protection function of the line.

[0003] However, the correctness of the aforementioned reclosing and reactivation operations directly affects the power grid's reliability. Because these are high-frequency, routine operations during line maintenance, they inevitably present certain hidden safety hazards. For example, due to the complexity of maintenance completion procedures and the numerous items requiring reclosing, coupled with factors such as fatigue from nighttime work, interference from overlapping operations, or omissions in shift handover information, maintenance personnel are highly susceptible to forgetting to engage the reclosing device after power restoration. Furthermore, if there are no abnormal indicator lights on the equipment panel, no native warnings from the monitoring system, and no obvious abnormalities in the line under normal operating conditions, highly concealed defects can escalate from a quickly recoverable transient fault into a permanent power outage when a real fault occurs and the reclosing device fails to operate due to lack of engagement or malfunction. This only becomes apparent after load loss, representing a typical post-incident safety hazard that severely restricts the reliability of the line's power supply.

[0004] Currently, the industry relies entirely on traditional human-based risk management methods, such as manual operation ticket verification and on-duty supervisor checks, to control the aforementioned hidden safety hazards. This approach has the following shortcomings: (1) Limited surface-level identification: Traditional methods only check the physical position of the pressure plate and cannot identify deep-seated hidden faults such as "the pressure plate is engaged, but the internal logic of the protection device is blocked or the software is faulty, resulting in the reclosing not being charged". For example, the setting is incorrect, the reclosing soft pressure plate is incorrectly set to be deactivated, or the reclosing is incorrectly set to be deactivated in the control word; (2) Poor practicality of single-end warning: During normal operation of the line, the short-term non-charging state is very likely to trigger invalid warnings, which cannot be used as a reliable warning method for practical application; (3) Insufficient reliability of comparison: The data collected by traditional methods are subject to risks such as delay, asynchrony, and channel abnormality due to transmission through multiple links such as station control layer network and remote control device, making it difficult to guarantee the real-time performance and accuracy of the two-end status comparison.

[0005] Therefore, in order to address the shortcomings of the traditional civil defense model, it is urgent to develop a simple, reliable, and independently implementable early warning technology to effectively prevent and control missed reclosing and functional failures. Summary of the Invention

[0006] The technical problem to be solved by the embodiments of the present invention is to provide an intelligent early warning method for reclosing charging status based on the comparison of the protection device kernel. Based on the natural two-end interaction characteristics of the original point-to-point optical fiber channel of the line protection, the method directly realizes the consistency comparison of the reclosing charging status on both sides through the protection device kernel, thereby achieving effective prevention and control of reclosing missed activation and functional hidden failure, thus solving the shortcomings of the traditional human defense mode.

[0007] To address the aforementioned technical problems, this invention provides an intelligent early warning method for reclosing charging status based on core comparison of protection devices. This method is used to satisfy the dual-use principle by configuring two protection devices on the same transmission line, with these two protection devices achieving two-way data interaction through a preset protection optical fiber channel. The method includes the following steps: S1. Each protection device reads the lockout flag and reclosing charging status on its own side, packages them into a message, and sends it to the protection device on the other side; wherein, the lockout flag includes an open state and a locked state; the reclosing charging status includes charging complete and not charging; S2. Each protection device extracts the blocking flag and reclosing charging status of the other side from the message sent by the other protection device, and compares the blocking flag of this side with the blocking flag of the other side to determine whether a comparison needs to be initiated. If it is determined that a comparison is needed, the reclosing charging status of this side is compared with the reclosing charging status of the other side, and further, based on the comparison result, a warning is issued or no warning is issued.

[0008] Specifically, step S2 includes: Each protection device determines that a comparison needs to be initiated when both the lockout indicator on its side and the lockout indicator on the opposite side are in the open state. No warning is issued when the reclosing charging status on its side and the reclosing charging status on the opposite side are consistent, indicating that charging is complete or not.

[0009] The method further includes: When each protection device determines that a comparison needs to be initiated, if the comparison shows that the reclosing charging status on its side is not charging while the reclosing charging status on the opposite side is charging complete, then an early warning will be issued.

[0010] The method further includes: After each protection device issues an early warning, it automatically triggers the preset reclosing charging conditions to perform a self-check item by item, and then uploads the self-check results to the backend along with the early warning signal.

[0011] The preset reclosing charging conditions include: the reclosing function is enabled, there is no prohibition on reclosing, the primary equipment is in the closed position, and there is no external interlocking signal; wherein, The activation of the reclosing function is achieved by detecting that the reclosing soft pressure plate on the current protection device is activated and the control word is set to "1". The absence of a "reclosing prohibition" input signal is obtained by detecting that the current protection device does not have a "reclosing prohibition" / "reclosing disabled" input signal. The primary device is in the closed position by detecting that the circuit breaker or switch connected to the current protection device is in the closed position; The absence of an external interlock signal is obtained by detecting that the current protection device does not have any external interlock signal; wherein, the external interlock signal includes at least the "low switch pressure" interlock signal.

[0012] Step S2 further includes: Each protection device determines that no comparison needs to be initiated and no warning is issued when it finds that at least one of the lockout signs on its side and the lockout sign on the opposite side is in a locked state.

[0013] Each protection device determines its lockout status (locked or open) by detecting whether it is in a non-operating condition and whether its reclosing circuit breaker has been properly deactivated according to the dispatch order. The lockout flag is obtained when the current protection device is in a non-operating condition or when the reclosing device on it is normally deactivated according to the dispatch order. The lockout flag is in the open state when it is detected that the current protection device is not in a non-operational condition, and the reclosing device installed on it has not been properly deactivated and maintained in operation according to the dispatch order; If the maintenance or standby pressure plate on the current protection device is detected to be engaged, it is determined that the current protection device is in a non-operating condition; conversely, if the maintenance or standby pressure plate on the current protection device is detected to be disengaged, it is determined that the current protection device is not in a non-operating condition. If the current protection device has received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has exited normally according to the dispatch order; otherwise, if the current protection device has not received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has not exited normally according to the dispatch order and remains in operation.

[0014] The method further includes: Each protection device, upon detecting a locked state on its own side, generates a corresponding charging completion remote signal value and uploads it to the backend. This allows the backend to simultaneously display the locked state of the protection device and its locking reason field based on the received charging completion remote signal value. The charging completion remote signal value includes a first remote signal value corresponding to the activation of the maintenance pressure plate, a second remote signal value corresponding to the activation of the standby pressure plate, and a third remote signal value corresponding to manual confirmation of withdrawal. The locking reason field includes the activation of the maintenance pressure plate, the activation of the standby pressure plate, and the manual confirmation of withdrawal, and each corresponds to one of the first to third remote signal values.

[0015] Prior to step S1, the following steps are also included: The preparations for confirming the on-site status of the two protection devices have been completed; these preparations include verifying the integrity of the original differential / remote hop fiber optic channel of the line, confirming that the communication status of the two protection devices is normal, and testing that the bit error rate and attenuation of the channel are within acceptable ranges.

[0016] Implementing the embodiments of the present invention has the following beneficial effects: 1. Unlike existing technologies that only detect the surface-level discrimination method of reclosing soft and hard pressure plates, this invention directly captures the core and most real "reclosing charging status" inside the protection device for dual-end comparison, rather than manual operation or pressure plate position status. This fundamentally solves the hidden blind spot of "pressure plate showing as engaged, actual device not charging, and reclosing function failure". The discrimination result is completely consistent with the actual operating conditions of the equipment, thereby achieving effective prevention and control of hidden failure of reclosing function. 2. This invention leverages the inherent two-way interactive characteristics of the original point-to-point fiber optic channel in line protection. By reusing the original differential fiber optic channel of the line protection, it packages the blocking flag and reclosing charging status into a message, enabling bidirectional real-time transmission of the reclosing charging status between the local and remote sides. This completely eliminates the need for the cross-site 104 dispatch channel, eliminating the need for cross-site data permission applications, master station configuration, new hardware, and optical path modifications. Local maintenance teams can independently complete the logic configuration and upgrades. 3. This invention implements the consistency comparison logic of the dual-end reclosing charging status directly within the protection device, rather than relying on comparison after centralized collection by the backend system. This has the following significant advantages: First, the data source is the "first-hand" charging status data of the protection device's core, without any forwarding, ensuring the highest accuracy and real-time performance. Second, point-to-point fiber optic direct transmission ensures strict time synchronization between the local and remote sides, eliminating the transmission delay and data processing latency issues of the backend centralized collection method. Third, the function is fully implemented in a closed loop within the protection device, without relying on external systems such as the monitoring backend or remote control devices. Even if the backend system is under maintenance or malfunctions, the comparison function can still operate normally, with reliability far exceeding that of the backend centralized collection scheme. Fourth, the comparison result is directly output as an early warning signal by the protection device and uploaded to the backend via the station control layer network, ensuring clear logic and traceability. 4. This invention integrates multi-dimensional line operation precision judgment criteria of "primary equipment location + electrical quantity + equipment status". The early warning logic automatically starts the dual-end status comparison only when it determines that the line is in a real grid-connected load operation state. It automatically locks in non-operational conditions such as maintenance and standby, thus eliminating false early warnings from the mechanism. At the same time, it supports a manual confirmation exit mechanism. For operation modes that exit reclosing normally according to the dispatch order, operation and maintenance personnel can confirm the lockout early warning with one click. The operation is recorded and auditable. By utilizing the characteristics of synchronous dual-end status during normal operation and asymmetrical abnormal fault status, and through the differentiated feature of "one side is charging and the other side is not charging", it can achieve proactive early warning of hidden dangers such as missed reclosing, logic lockout, and channel abnormality, and complete the essential safety upgrade from post-event accountability to pre-event prevention. 5. When the invention detects an inconsistency in the charging status of the reclosing circuit breaker at both ends, the protection device on the non-charging side automatically triggers an internal self-check of the reclosing charging conditions item by item. This accurately locates the specific reasons why the reclosing circuit breaker cannot charge (such as the soft pressure plate not being engaged, the control word not being set, the presence of interlocking input, the switch not being in the closed position, etc.), and sends the self-check results to the background along with the warning signal. This provides maintenance personnel with accurate fault diagnosis guidance and significantly shortens the time for hazard location and elimination. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0018] Figure 1 The flowchart illustrates an intelligent early warning method for reclosing charging status based on protection device kernel comparison, provided in an embodiment of the present invention. Detailed Implementation

[0019] 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 accompanying drawings.

[0020] like Figure 1 As shown in the figure, an intelligent early warning method for reclosing charging status based on protection device kernel comparison is proposed in an embodiment of the present invention. This method is used to satisfy the dual-configuration principle on two protection devices configured on the same transmission line, and these two protection devices achieve two-way data interaction through a preset protection optical fiber channel. The method includes the following steps: Step S1: Each protection device reads the lockout flag and reclosing charging status on its own side, packages them into a message, and sends it to the protection device on the other side; wherein, the lockout flag includes an open state and a locked state; the reclosing charging status includes charging complete and not charging; Step S2: Each protection device extracts the blocking flag and reclosing charging status of the other side from the message sent by the other protection device, and compares the blocking flag of this side with the blocking flag of the other side to determine whether a comparison needs to be initiated. If it is determined that a comparison is needed, the reclosing charging status of this side is compared with the reclosing charging status of the other side, and further, based on the comparison result, a warning is issued or no warning is issued.

[0021] The specific process is as follows: before step S1, firstly, two protection devices that meet the dualization principle are configured on the same transmission line, and the two protection devices realize two-way data interaction through a preset protection optical fiber channel.

[0022] Secondly, it is necessary to confirm that the on-site preparations for both protection devices have been completed. These preparations include, but are not limited to, verifying the integrity of the original differential / remote hopping fiber optic channels, confirming the normal communication status of the two protection devices, and testing that the channel error rate and attenuation are within acceptable ranges. In one example, using the NARI PCS-931, the protection device has a "channel abnormality" warning. The "channel abnormality light" on the device panel being off is the basis for judging a good channel. It is also necessary to confirm the availability of reserved bytes in the protection communication protocol to ensure the data carrying capacity of the messages.

[0023] In step S1, a lightweight "reclosing charging status pass-through" message is added to the logic of these two protection devices, and the message format and data length are defined. This does not change the original protection action logic and core protection functions such as differential and remote tripping; it only adds the status pass-through function and, relying on the existing protection fiber optic channel, completes the bidirectional real-time mutual transmission configuration of the reclosing charging status at both ends. At this time, the blocking flag and the reclosing charging status are packaged together into a message, which can be passed through within the existing communication framework of the protection devices without adding extra communication load. Moreover, this mechanism reuses the existing fiber optic channel between protection devices without adding any physical channels or hardware devices.

[0024] Therefore, each protection device reads the lockout flag and reclosing charging status on its own side and packages them into a message to send to the protection device on the other side. That is, protection device A packages the lockout flag and reclosing charging status on its own side into a message and sends it to protection device B. At the same time, protection device B also packages the lockout flag and reclosing charging status on its own side into a message and sends it to protection device A.

[0025] It should be noted that before the comparison is initiated, the protection devices simultaneously and independently execute the same interlocking judgment logic, each independently making judgments and generating interlocking flags, without affecting each other.

[0026] At this time, each protection device obtains its lockout status (locked or open) by detecting whether it is in a non-operating condition and whether its reclosing device has exited normally according to the dispatch order; among them, The interlocking flag is in the interlocked state when it is detected that the current protection device is in a non-operating condition or that the reclosing device on it has been normally deactivated by the dispatch order (i.e., manually confirmed deactivation); the interlocking flag is in the open state when it is detected that the current protection device is not in a non-operating condition, and that the reclosing device on it has not been normally deactivated by the dispatch order and has remained in operation.

[0027] In one example, if the maintenance or standby pressure plate on the current protection device is detected to be engaged, it is determined that the current protection device is in a non-operating condition; conversely, if the maintenance or standby pressure plate on the current protection device is detected to be disengaged, it is determined that the current protection device is not in a non-operating condition.

[0028] If the current protection device has received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has exited normally according to the dispatch order; otherwise, if the current protection device has not received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has not exited normally according to the dispatch order and remains in operation.

[0029] It should be noted that the backend is connected to one of the protection devices so that the backend can directly send and receive commands and data with the connected protection device. Furthermore, the backend's command and data transmission with the other protection device is first relayed by the protection device connected to the backend, and then the original differential fiber optic channel of the line protection is reused to the other protection device.

[0030] Table 1 below shows the generation table of interlocking conditions and interlocking flags for a single protection device: Table 1

[0031] When a protection device is locked due to maintenance pressure plate activation or manual confirmation of deactivation, the charging completion remote signal value of that device will be uploaded to the backend (in the maintenance or deactivation state, it will be "not charging"). The backend can simultaneously display that the protection device is in the "locked state" and its specific lockout reason field (e.g., "maintenance pressure plate activation" or "manual confirmation of deactivation"), thereby ensuring that maintenance personnel can clearly distinguish between "non-charging caused by actual defects" and "lockout and deactivation caused by expected operating conditions" in the backend, avoiding misjudgment.

[0032] Therefore, the method further includes: each protection device, upon reading that the local lockout flag is in a locked state, generates a corresponding charging completion remote signal value and uploads it to the backend, so that the backend can synchronously display the locked state of the protection device and its lockout reason field based on the received charging completion remote signal value; wherein, the charging completion remote signal value includes a first remote signal value corresponding to the engagement of the maintenance pressure plate, a second remote signal value corresponding to the engagement of the standby pressure plate, and a third remote signal value corresponding to the manual confirmation of withdrawal; the lockout reason field includes maintenance pressure plate engagement, standby pressure plate engagement, and manual confirmation of withdrawal, and forms a one-to-one correspondence mapping relationship with the first to third remote signal values ​​respectively.

[0033] It should be noted that for scenarios where reclosing exits normally according to the dispatch order, a manual confirmation exit mechanism table (as shown in Table 2 below) is set up as the triggering method for interlocking condition ② in Table 1.

[0034] Table 2

[0035] In step S2, the two protection devices first exchange their local blocking flags via a fiber optic channel. Each protection device knows whether the other is in a blocked state and decides whether to initiate a comparison accordingly.

[0036] At this point, the overall alarm table for the comparison logic activation condition is shown in Table 3 below: Table 3

[0037] Therefore, each protection device determines that a comparison needs to be initiated when both the local and the opposite lockout signs are in the open state; at the same time, each protection device determines that a comparison does not need to be initiated when at least one of the local and opposite lockout signs is in the locked state.

[0038] Secondly, if it is determined that a comparison needs to be initiated, the reclosing charging status on this side is compared with the reclosing charging status on the opposite side, and a warning is issued or not based on the comparison result; at the same time, if it is determined that a comparison does not need to be initiated, no warning is issued.

[0039] At this point, the comparison logic triggers an overall warning table, as shown in Table 4 below: Table 4

[0040] Based on the dual-sided open states in Table 4, the design stipulates that each protection device will not issue a warning if both its own reclosing charging status and the other side's reclosing charging status are consistent (charging complete or not charging). Alternatively, if each protection device finds its own reclosing charging status to be not charging while the other side's reclosing charging status is charging complete, then a warning will be issued (i.e., the protection device with the reclosing charging status not charging will issue a warning).

[0041] Therefore, based on the comparison results in the above-mentioned two-sided open state, a comparison table of comparison results and warning behaviors can be designed as shown in Table 5 below: Table 5

[0042] It should be noted that when both protection devices are in the "not charging" state, the comparison result is "consistent," and the program determines it as a normal consistent state, without generating an alarm. The reason for not issuing an alarm is that the states on both sides are completely consistent, meeting the "consistency" judgment standard, and "not charging" itself is not necessarily a fault (e.g., no-load, charging delay, etc. are all normal operating conditions), thus avoiding invalid alarms and maintaining the maintenance personnel's trust in the system alarms.

[0043] In addition, when one protection device is detected as "not charging" while another protection device is "charging complete", the protection device on the side that is not charging will automatically trigger a self-check of the preset reclosing charging conditions to accurately locate the specific reason why the reclosing on this side cannot charge, and upload the self-check results to the background along with the warning signal.

[0044] Therefore, the method further includes: after an early warning, each protection device automatically triggers preset reclosing charging conditions to perform a self-check item by item, and further uploads the self-check results to the backend along with the early warning signal; wherein, Internal reclosing charging conditions include reclosing function being enabled, no reclosing prohibition input, primary equipment being in the closed position, and no external interlocking signal. The reclosing function is activated by detecting that the reclosing soft pressure plate on the current protection device is activated and the control word is set to "1". The absence of a "reclosing prohibition" input signal is obtained by detecting that the current protection device does not have a "reclosing prohibition" / "reclosing disabled" input signal. The primary device is in the closed position by detecting that the circuit breaker or switch connected to the current protection device is in the closed position; The absence of external interlock signals is obtained by detecting that there are no external interlock signals currently present in the protection device; wherein, the external interlock signals include at least the "low switch pressure" interlock signal.

[0045] In one example, taking NARI PCS-931 as an example, a hierarchical self-test logic table for reclosing charging conditions is designed, as shown in Table 6 below: Table 6

[0046] In addition, an abnormal asymmetric state classification and identification table was designed, as shown in Table 7 below: Table 7

[0047] Meanwhile, based on the single-sided and double-sided blocking states in Table 4, the principle for the protection device not to issue an early warning in the blocking state is designed, as shown in Table 8 below: Table 8

[0048] Implementing the embodiments of the present invention has the following beneficial effects: 1. Unlike existing technologies that only detect the surface-level discrimination method of reclosing soft and hard pressure plates, this invention directly captures the core and most real "reclosing charging status" inside the protection device for dual-end comparison, rather than manual operation or pressure plate position status. This fundamentally solves the hidden blind spot of "pressure plate showing as engaged, actual device not charging, and reclosing function failure". The discrimination result is completely consistent with the actual operating conditions of the equipment, thereby achieving effective prevention and control of hidden failure of reclosing function. 2. This invention leverages the inherent two-way interactive characteristics of the original point-to-point fiber optic channel in line protection. By reusing the original differential fiber optic channel of the line protection, it packages the blocking flag and reclosing charging status into a message, enabling bidirectional real-time transmission of the reclosing charging status between the local and remote sides. This completely eliminates the need for the cross-site 104 dispatch channel, eliminating the need for cross-site data permission applications, master station configuration, new hardware, and optical path modifications. Local maintenance teams can independently complete the logic configuration and upgrades. 3. This invention implements the consistency comparison logic of the dual-end reclosing charging status directly within the protection device, rather than relying on comparison after centralized collection by the backend system. This has the following significant advantages: First, the data source is the "first-hand" charging status data of the protection device's core, without any forwarding, ensuring the highest accuracy and real-time performance. Second, point-to-point fiber optic direct transmission ensures strict time synchronization between the local and remote sides, eliminating the transmission delay and data processing latency issues of the backend centralized collection method. Third, the function is fully implemented in a closed loop within the protection device, without relying on external systems such as the monitoring backend or remote control devices. Even if the backend system is under maintenance or malfunctions, the comparison function can still operate normally, with reliability far exceeding that of the backend centralized collection scheme. Fourth, the comparison result is directly output as an early warning signal by the protection device and uploaded to the backend via the station control layer network, ensuring clear logic and traceability. 4. This invention integrates multi-dimensional line operation precision judgment criteria of "primary equipment location + electrical quantity + equipment status". The early warning logic automatically starts the dual-end status comparison only when it determines that the line is in a real grid-connected load operation state. It automatically locks in non-operational conditions such as maintenance and standby, thus eliminating false early warnings from the mechanism. At the same time, it supports a manual confirmation exit mechanism. For operation modes that exit reclosing normally according to the dispatch order, operation and maintenance personnel can confirm the lockout early warning with one click. The operation is recorded and auditable. By utilizing the characteristics of synchronous dual-end status during normal operation and asymmetrical abnormal fault status, and through the differentiated feature of "one side is charging and the other side is not charging", it can achieve proactive early warning of hidden dangers such as missed reclosing, logic lockout, and channel abnormality, and complete the essential safety upgrade from post-event accountability to pre-event prevention. 5. When the invention detects an inconsistency in the charging status of the reclosing circuit breaker at both ends, the protection device on the non-charging side automatically triggers an internal self-check of the reclosing charging conditions item by item. This accurately locates the specific reasons why the reclosing circuit breaker cannot charge (such as the soft pressure plate not being engaged, the control word not being set, the presence of interlocking input, the switch not being in the closed position, etc.), and sends the self-check results to the background along with the warning signal. This provides maintenance personnel with accurate fault diagnosis guidance and significantly shortens the time for hazard location and elimination.

[0049] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disk, etc.

[0050] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for intelligent early warning of reclosing charging status based on comparison of the protection device kernel, characterized in that, The method involves configuring two protection devices on the same transmission line to meet the duality principle, and these two protection devices achieve two-way data interaction through a preset protection optical fiber channel; the method includes the following steps: S1. Each protection device reads the lockout flag and reclosing charging status on its own side, packages them into a message, and sends it to the protection device on the other side; wherein, the lockout flag includes an open state and a locked state; the reclosing charging status includes charging complete and not charging; S2. Each protection device extracts the blocking flag and reclosing charging status of the other side from the message sent by the other protection device, and compares the blocking flag of this side with the blocking flag of the other side to determine whether a comparison needs to be initiated. If it is determined that a comparison is needed, the reclosing charging status of this side is compared with the reclosing charging status of the other side, and further, based on the comparison result, a warning is issued or no warning is issued.

2. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 1, characterized in that, Step S2 specifically includes: Each protection device determines that a comparison needs to be initiated when both the lockout indicator on its side and the lockout indicator on the opposite side are in the open state. No warning is issued when the reclosing charging status on its side and the reclosing charging status on the opposite side are consistent, indicating that charging is complete or not.

3. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 2, characterized in that, The method further includes: When each protection device determines that a comparison needs to be initiated, if the comparison shows that the reclosing charging status on its side is not charging while the reclosing charging status on the opposite side is charging complete, then an early warning will be issued.

4. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 3, characterized in that, The method further includes: After each protection device issues an early warning, it automatically triggers the preset reclosing charging conditions to perform a self-check item by item, and then uploads the self-check results to the backend along with the early warning signal.

5. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 4, characterized in that, The preset reclosing charging conditions include: the reclosing function is enabled, there is no prohibition on reclosing, the primary equipment is in the closed position, and there is no external interlocking signal; wherein... The activation of the reclosing function is achieved by detecting that the reclosing soft pressure plate on the current protection device is activated and the control word is set to "1". The absence of a "disable reclosing" input signal is obtained by detecting that the current protection device does not have a "disable reclosing" / "disable reclosing" input signal. The primary device is in the closed position by detecting that the circuit breaker or switch connected to the current protection device is in the closed position; The absence of an external interlock signal is obtained by detecting that the current protection device does not have any external interlock signal; wherein, the external interlock signal includes at least the "low switch pressure" interlock signal.

6. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 2, characterized in that, Step S2 further includes: Each protection device determines that no comparison needs to be initiated and no warning is issued when it finds that at least one of the lockout signs on its side and the lockout sign on the opposite side is in a locked state.

7. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 1, characterized in that, Each protection device determines its lockout status (locked or open) by detecting whether it is in a non-operating condition and whether its reclosing circuit breaker has been properly deactivated according to the dispatch order; among them, The lockout flag is obtained when the current protection device is in a non-operating condition or when the reclosing device on it is normally deactivated according to the dispatch order. The lockout flag is in the open state when it is detected that the current protection device is not in a non-operational condition, and the reclosing device installed on it has not been properly deactivated and maintained in operation according to the dispatch order; If the maintenance or standby pressure plate on the current protection device is detected to be engaged, it is determined that the current protection device is in a non-operating condition; conversely, if the maintenance or standby pressure plate on the current protection device is detected to be disengaged, it is determined that the current protection device is not in a non-operating condition. If the current protection device has received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has exited normally according to the dispatch order; otherwise, if the current protection device has not received a manual confirmation of exit from the background, it is determined that the reclosing device set on the current protection device has not exited normally according to the dispatch order and has not been kept in operation.

8. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 7, characterized in that, The method further includes: Each protection device, upon detecting a locked state on its own side, generates a corresponding charging completion remote signal value and uploads it to the backend. This allows the backend to simultaneously display the locked state of the protection device and its locking reason field based on the received charging completion remote signal value. The charging completion remote signal value includes a first remote signal value corresponding to the activation of the maintenance pressure plate, a second remote signal value corresponding to the activation of the standby pressure plate, and a third remote signal value corresponding to manual confirmation of withdrawal. The locking reason field includes the activation of the maintenance pressure plate, the activation of the standby pressure plate, and the manual confirmation of withdrawal, and each corresponds to one of the first to third remote signal values.

9. The intelligent early warning method for reclosing charging status based on protection device kernel comparison as described in claim 1, characterized in that, Before step S1, the following steps are also included: The preparations for confirming the on-site status of the two protection devices have been completed; these preparations include verifying the integrity of the original differential / remote hopping fiber optic channel of the line, confirming that the communication status of the two protection devices is normal, and testing that the bit error rate and attenuation of the channel are within acceptable ranges.

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