Relay protection device parameter automatic recovery method based on position information

Abstract

The invention relates to a relay protection device parameter automatic recovery method based on position information, and the method comprises the following steps: S1, determining whether a positioner is correctly installed or not after a power distribution device is powered on and operates; s2, identifying the position installation conditions of the relay protection device and the positioner according to the identification matching result of the relay protection device and the positioner; and S3, determining a data recovery method according to the position installation condition. According to the relay protection device parameter automatic recovery method based on the position information, the installation position of the relay protection device can be automatically identified, whether the relay protection device and the positioner are correctly installed or not is detected, and the relay protection device parameters are automatically recovered based on different position installation conditions of the relay protection device; according to the method, the device parameters are automatically recovered when the relay protection device is replaced, and the relay protection device parameters do not need to be manually input, so that the relay protection device is ensured to operate under correct parameters, and the operation safety of a power system is protected.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection, and in particular to a method for automatically restoring parameters of a relay protection device based on position information. Background Art

[0002] When a power component (such as a generator, line, etc.) or the power system itself fails and endangers the safe operation of the power system, a warning signal can be sent to the operating personnel on duty in a timely manner, or a tripping command can be directly sent to the controlled circuit breaker to stop the development of these events. This kind of automated measures and equipment is called a relay protection device. The relay protection device is the core element to ensure the safe operation of the power system. When an abnormal situation is detected, the relay protection device makes a judgment and sends a control signal, and the circuit breaker performs the operation of cutting off the circuit, further protecting the safety of the equipment and the power system.

[0003] However, if the installation position of the relay protection device is wrong, it will cause the relay protection device to malfunction and the device parameters to be incorrect. As a result, when the power system suddenly loses power or fails, the circuit breaker cannot be given a trip command in time, resulting in the failure to automatically eliminate the fault, which will cause a large-scale power outage.

[0004] Therefore, there is an urgent need to provide a method for automatically restoring parameters of a relay protection device based on position information to solve the problems in the background technology. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, a method for automatically restoring parameters of a relay protection device based on position information is provided.

[0006] The technical solution adopted by the present invention to solve the technical problem is a method for automatically restoring parameters of a relay protection device based on position information, comprising the following steps: Step S1: After the power distribution device is powered on, confirm whether the positioner is correctly installed according to the communication status between the positioner and the relay protection device; Step S2: According to the identification matching results of the relay protection device and the positioner, the installation position of the relay protection device and the positioner is identified; Step S3: Determine the data recovery method according to the installation location and write parameter configuration information.

[0007] Furthermore, the position of the relay protection device includes three installation situations, namely, the relay protection device is replaced and the positioner is not replaced; the relay protection device is not replaced and the positioner is replaced; the relay protection device is not replaced, the positioner is not replaced, and the relay protection device parameters are changed.

[0008] Furthermore, in S2, the identifications of the relay protection device and the locator are matched such that the first identification of the locator matches the unique identification of the relay protection device.

[0009] Furthermore, before step S2, the method further includes: the relay protection device extracting the first identifier of the locator.

[0010] Furthermore, if the first identifier of the positioner does not match the unique identifier of the relay protection device, and the first identifier is the default initial identifier of the positioner, it is determined that the positioner has been replaced and the existing positioner is used for the first time.

[0011] Furthermore, if the first identifier of the positioner does not match the unique identifier of the relay protection device, and the first identifier is not the default initial identifier of the positioner, it is determined that the relay protection device has been replaced and the relay protection device is an updated new component.

[0012] Further, it is determined whether the model and hardware version of the relay protection device are the same as the parameters of the previous relay protection device stored in the positioner. If they are the same, it is determined that the relay protection device is correctly installed.

[0013] Furthermore, if the model and hardware version of the relay protection device are different from the parameters of the previous relay protection device stored in the positioner, it proves that the model of the relay protection device has been replaced incorrectly and the relay protection device is not suitable for use in the distribution cabinet. At this time, the relay protection device will automatically stop running and issue an alarm message that the relay protection device is not suitable for this equipment. Please replace it in time to remind maintenance personnel to replace the relay protection device with the correct model.

[0014] Further, if the first identifier of the positioner matches the unique identifier of the relay protection device, it is determined that neither the relay protection device nor the positioner has been replaced.

[0015] The present invention is reasonably designed and has the following advantages: 1. The present invention sequentially determines whether the positioner is installed correctly, whether the positioner and the relay protection device are replaced, whether the relay protection device is installed correctly, and whether the data in the relay protection device and the positioner are the latest and synchronized, which can ensure the normal operation of the relay protection device after power-on, and realizes the intelligent detection of the relay protection device status.

[0016] 2. The automatic recovery method of relay protection device parameters based on position information of the present invention can automatically identify the installation position of the relay protection device, detect whether the relay protection device and the locator are correctly installed, and automatically restore the relay protection device parameters based on the different installation conditions of the relay protection device. This method mainly solves the problem of automatically restoring the device parameters when the relay protection device is replaced, and does not require manual input of the relay protection device parameters, thereby ensuring that the relay protection device operates under the correct parameters and protecting the safe operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of a flow chart of a method for automatically restoring parameters of a relay protection device based on position information in an embodiment of the present invention; Figure 2 It is a schematic diagram of a flow chart of determining the Nth position installation situation in step S2 of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1 The method for automatically restoring parameters of a relay protection device based on position information shown includes the following steps: Step S1: After the distribution device is powered on, confirm whether the positioner is correctly installed based on the communication status between the positioner and the relay protection device.

[0023] It should be noted that in step S1, whether the locator is correctly installed is determined based on whether the relay protection device successfully scans the locator. Specifically, the relay protection device establishes communication with the locator, and determines whether the locator is correctly installed based on whether the communication is successful. If the relay protection device cannot scan the existence of the locator after the power distribution device is powered on, it is determined that the locator is incorrectly installed, and an alarm message "Please check whether the locator is correctly installed" is issued to remind the maintenance personnel to check whether the locator is correctly installed. The aforementioned relay protection device and the locator can communicate wirelessly or by wired communication.

[0024] Step S2: According to the identification matching results of the relay protection device and the positioner, the installation position of the relay protection device and the positioner is identified.

[0025] It should be noted that the locator and relay protection device in the automatic parameter recovery method of the relay protection device based on position information in the present invention are fixed in the power distribution cabinet, and the locator is used to determine whether the installation position of the relay protection device is correct. When detecting whether the installation position of the relay protection device is correct, it is not only necessary to detect whether the relay protection device has been replaced, but also whether the locator has been replaced and whether the data is updated in time. Otherwise, it is difficult to ensure that the relay protection device is in a normal operating state. Therefore, the installation position of the relay protection device and the locator must be correct and the data in the locator and the relay protection device should be the latest and synchronized. The locator includes a first control module, a first communication module, and a first storage module with a first identifier. The relay protection device includes a second control module, a second communication module, and a second storage module with a unique identifier. The unique identifier is used to characterize the identity of the relay protection device, and may include but is not limited to the form of a serial number. It only needs to be able to distinguish the relay protection device, and the unique identifier of each relay protection device is different. In general, the unique identifier is written when the relay protection device leaves the factory, and is data permanently bound to the relay protection device.

[0026] In the present invention, there are three types of relay protection device installation positions. In step S2, according to the identification matching of the relay protection device and the positioner, the first identification of the positioner matches the unique identification of the relay protection device, and it is determined to be the Nth type of position installation situation, where N≤3, and N is a natural number. The relay protection device installation position situation includes the first type of position installation situation (the relay protection device is replaced, and the positioner is not replaced); the second type of position installation situation (the relay protection device is not replaced, and the positioner is replaced); and the third type of position installation situation (the relay protection device is not replaced, the positioner is not replaced, and the relay protection device parameters are changed).

[0027] The step of determining the Nth position installation situation in step S2 also includes: Step S201: If the first identifier of the positioner matches the unique identifier of the relay protection device, it is determined that the positioner and the relay protection device have not been replaced, which is the third position installation situation; if the first identifier does not match the unique identifier of the relay protection device, it is determined that the relay protection device or the positioner is replaced, and the process goes to step S202; S202: Compare the first identifier in the locator with the default initial identifier of the locator. If the first identifier is the default initial identifier of the locator, it is determined that the locator has been replaced and the locator is used for the first time, which is the second position installation situation; if the first identifier is not the default initial identifier, it is determined that the relay protection device has been replaced and the relay protection device is used for the first time, and enters step S203.

[0028] S203: Determine whether the model and hardware version of the relay protection device are the same as the parameters of the previous relay protection device stored in the positioner. If they are the same, it is determined that the relay protection device is correctly installed, which is the first position installation situation; if the model and hardware version of the relay protection device are different from the parameters of the previous relay protection device stored in the positioner, it proves that the model of the relay protection device is incorrectly replaced, the relay protection device is not suitable for use in the distribution cabinet, and the relay protection device is installed in the wrong position. At this time, the relay protection device will automatically stop running and issue an alarm message "The relay protection device is not suitable for this equipment, please replace it in time" to remind maintenance personnel to replace the relay protection device with the correct model.

[0029] It should be noted that when the locator is used for the first time and matched with the relay protection device, the first identifier in the locator will be replaced from the default initial identifier to the unique identifier in the relay protection device. The specific execution process is that the first control module deletes the value of the original first identifier, stores the unique mark sent by the second management unit as the first identifier, and stores the new first identifier in the first storage module. When the first identifier of the locator is the default initial identifier, the locator is used for the first time, and the locator has not been matched with the relay protection device. Similarly, when the first identifier of the locator is not the default initial identifier, the locator is not used for the first time, and the locator has been matched with the relay protection device. Further, when the first identifier of the locator is the unique identifier of the relay protection device, the locator has been matched with the current relay protection device, and the current relay protection device and the locator have not been replaced. The present invention can simply and quickly determine whether the locator and the relay protection device have been replaced through the matching result that the first identifier of the locator is the unique identifier of the relay protection device.

[0030] Before step S201, the relay protection device also includes: obtaining the first identifier of the locator by sending the data of the first identifier to the second control module of the relay protection device through the first control module, or reading the first identifier stored in the locator through the second control module, which is not limited by the present invention.

[0031] Step S3: Determine the data recovery method according to the installation location and write parameter configuration information.

[0032] Taking three installation positions of the relay protection device as examples, the following describes in detail the automatic position identification method and parameter self-recovery method of the relay protection device of the present invention under different installation positions. Example 1

[0033] This embodiment is the first type of relay protection device installation situation, in which the relay protection device is replaced but the positioner is not replaced. The automatic identification method of the relay protection device position and the parameter self-recovery process are as follows: First, the relay protection device establishes a communication connection with the positioner, and the relay protection device reads the first identifier and parameters stored in the positioner; Then, the relay protection device compares its own unique identifier with the first identifier stored in the locator. The first identifier does not match the unique identifier, and the first identifier is not a default initial identifier, thereby determining that the relay protection device is installed at the location for the first time. Then, the new relay protection device reads the model and hardware version stored in the positioner. The model and hardware version stored in the positioner are the device model and hardware version information of the original relay protection device. The new relay protection device is verified with the model and hardware version information of the original relay protection device. If the model and hardware version of the new relay protection device are consistent with the model and hardware version stored in the positioner, the verification result is that the new relay protection device can replace the original relay protection device. The new device reads the relay protection device parameters stored in the positioner and automatically inputs the parameters into the new relay protection device for operation. If the model and hardware version of the new relay protection device are inconsistent with the model and hardware version stored in the positioner, the verification result is that the new relay protection device cannot replace the original device. The new relay protection device outputs an alarm message, indicating that the new relay protection device is not compatible with the original relay protection device.

[0034] In this embodiment, after replacing the relay protection device, the newly installed relay protection device does not have various parameters of the previous relay protection device, such as relay protection setting parameters, operating parameters, anti-overstepping parameters, and communication parameters. The relay protection setting parameters determine the action range and triggering conditions of the protection device. The operating parameters determine the working mode and operating status of the relay protection device. The anti-overstepping parameters ensure the correct level and priority of the protection system, including the priority of the protection device, delay settings, and impedance settings. The present invention can effectively prevent the accidental triggering of the protection function, prevent malfunction or overstepping of the protection function, ensure the normal operation of the relay protection device, and provide effective protection when a fault occurs in the power system by updating the parameters of the previous relay protection device stored in the positioner to the new relay protection device. Example 2

[0035] This embodiment is the second installation situation of the relay protection device, in which the positioner is replaced but the relay protection device is not replaced. The automatic identification method of the relay protection device position and the parameter self-recovery process are as follows: First, the replaced positioner establishes a communication connection with the relay protection device, and the relay protection device reads the unique identification and parameters of the relay protection device stored in the positioner; Then, the relay protection device compares its own unique identifier with the first identifier stored in the locator. The first identifier does not match the unique identifier, and the first identifier is a default initial identifier, thereby determining that the locator is installed at the location for the first time. Then, the relay protection device transmits its unique identification and parameters to the locator through communication, and the locator permanently stores the data in the first storage module in the locator.

[0036] In this embodiment, the first identifier is the default initial identifier of the positioner, for example, F, 0, so that it can be identified that the positioner has not been paired with any relay protection device.

[0037] After the positioner of this embodiment is replaced, the newly installed positioner has the device version and various device parameters of the relay protection device in the previous positioner after data transmission through the relay protection device, so that the newly replaced positioner can effectively detect the status of the relay protection device when it is powered on next time, and know whether the installation position of the relay protection device is correct and whether its parameters are correct. Example 3

[0038] This embodiment is the third relay protection device installation situation, in which the relay protection device is not replaced, the positioner is not replaced, and the relay protection device parameters are changed. The automatic position identification method of the relay protection device and the parameter self-recovery process are as follows: First, when the relay protection device parameters are changed, the relay protection device automatically communicates with the positioner and reads the first identification and various device parameters stored in the positioner; Then, the relay protection device compares its own unique identifier with the first identifier stored in the locator, and finds that the two identifiers are consistent, and the relay protection device determines that neither the locator nor the relay protection device has been replaced; Finally, the relay protection device transmits the changed parameters to the positioner, replaces the original parameters in the positioner, and the positioner saves the parameters in the first storage module.

[0039] It should be noted that in this embodiment, the maintenance personnel remotely modify the parameters in the relay protection device through the communication link on the power supply monitoring system or directly modify the parameter settings on the relay protection device, so that the parameters in the second storage module in the relay protection device are changed.

[0040] In other embodiments, after the power distribution device is powered on, the relay protection device reads the first identification and parameters of the relay protection device stored in the locator. When the first identification of the locator matches the unique identification of the relay protection device, it is determined that the locator and the relay protection device have been used in pair and have not been replaced, and are both in a suitable installation position. The relay protection device compares the parameters. If the parameters are inconsistent, it means that the parameters of the relay protection device have been re-entered, and the relay protection device transmits the re-entered parameter information to the locator for storage. If the parameters are consistent, it means that the parameters in the relay protection device and the locator are the latest parameters.

[0041] The automatic recovery method of relay protection device parameters based on position information of the present invention can automatically identify the installation position of the relay protection device, detect whether the relay protection device and the positioner are correctly installed, and automatically recover the parameters of the relay protection device based on the different installation conditions of the relay protection device. This method mainly solves the problem of automatically recovering the device parameters when the relay protection device is replaced, and does not require manual input of the relay protection device parameters, thereby ensuring that the relay protection device operates under the correct parameters and protecting the safe operation of the power system.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically restoring parameters of a relay protection device based on position information, characterized in that: The following steps are involved: Step S1: After the power distribution device is powered on, confirm whether the positioner is correctly installed according to the communication status between the positioner and the relay protection device; Step S2: According to the identification matching results of the relay protection device and the positioner, the installation position of the relay protection device and the positioner is identified; Step S3: Determine the data recovery method according to the installation location and write the parameter configuration information.

2. The method for automatically restoring parameters of a relay protection device based on position information according to claim 1, characterized in that: The relay protection device position includes three installation situations, namely, the relay protection device is replaced but the positioner is not replaced; the relay protection device is not replaced but the positioner is replaced; the relay protection device is not replaced, the positioner is not replaced, and the relay protection device parameters are changed.

3. The method for automatically restoring parameters of a relay protection device based on position information according to claim 2, characterized in that: In S2, the identification matching of the relay protection device and the positioner is that the first identification of the positioner matches the unique identification of the relay protection device.

4. The method for automatically restoring parameters of a relay protection device based on position information according to claim 2, characterized in that: Before step S2, the method further includes: the relay protection device extracting a first identifier of the locator.

5. The method for automatically restoring parameters of a relay protection device based on position information according to claim 4 is characterized in that: If the first identification of the positioner does not match the unique identification of the relay protection device, and the first identification is the default initial identification of the positioner, it is determined that the positioner has been replaced and the existing positioner is used for the first time.

6. The method for automatically restoring parameters of a relay protection device based on position information according to claim 4, characterized in that: If the first identifier of the positioner does not match the unique identifier of the relay protection device, and the first identifier is not the default initial identifier of the positioner, it is determined that the relay protection device has been replaced and the relay protection device is a new component after an update.

7. The method for automatically restoring parameters of a relay protection device based on position information according to claim 6, characterized in that: Determine whether the model and hardware version of the relay protection device are the same as the parameters of the previous relay protection device stored in the positioner. If they are the same, it is determined that the relay protection device is correctly installed.

8. The method for automatically restoring parameters of a relay protection device based on position information according to claim 7, characterized in that: If the model and hardware version of the relay protection device are different from the parameters of the previous relay protection device stored in the positioner, it proves that the relay protection device model has been replaced incorrectly and the relay protection device is not suitable for use in the distribution cabinet. At this time, the relay protection device will automatically stop running and issue an alarm message that the relay protection device is not suitable for this equipment. Please replace it in time to remind the maintenance personnel to replace the relay protection device with the correct model.

9. The method for automatically restoring parameters of a relay protection device based on position information according to claim 4, characterized in that: If the first identifier of the positioner matches the unique identifier of the relay protection device, it is determined that neither the relay protection device nor the positioner has been replaced.

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