Fault information record management method and system for CT self-powered relay protection device

Abstract

The invention relates to a CT self-powered relay protection device fault information record management method and system, and the method comprises the following steps: judging whether a detected circuit breaks down or not when an induction current reaches a set value and a CT self-powered relay protection device is awakened, generating fault information when the detected circuit breaks down, and storing the fault information; and when the communication interface module of the CT self-powered relay protection device is opened, uploading all stored fault information. According to the working logic which is firstly stored and then used, after fault judgment is carried out on the current state during each power-on, the corresponding fault information is firstly stored, whether the communication module is opened or not is judged, and if the communication module is opened, all the currently stored fault reports are uploaded; and the fault information is stored even if the power supply is not opened or the uploading fails, and the fault information is tried to be uploaded again when the next power supply meets the wake-up condition, so that the fault information is not easy to lose, and the system perception capability of the CT self-powered relay protection device is improved.

Description

Technical Field

[0001] The invention relates to a fault information recording and management method and system for a CT self-powered relay protection device, belonging to the technical field of relay protection. Background Art

[0002] The CT self-powered relay protection device supports power only from the system CT, without the need for an external auxiliary power supply, to achieve functions such as AC sampling, current protection, and output tripping. This type of device generally supports multiple power supply methods, such as CT power supply, auxiliary power supply, USB power supply, and battery power supply. Under normal system operation, the CT output current is not enough to provide sufficient power for the protection device, that is, it will shut down when the current is insufficient. When the system has an abnormal current mutation, the CT induction current will only operate when it reaches a certain level. In addition, in addition to the CT self-powered relay protection device being awakened when the system has an abnormal current mutation, the CT self-powered relay protection device will also be awakened when the load current is large. The size of the load current is determined by the electrical appliances. The more electrical appliances working simultaneously in the circuit, the greater the load current. That is, the CT self-powered relay protection device has special operating conditions of short-term operation and long-term shutdown.

[0003] Common relay protection devices on the market are usually continuously powered. Due to the characteristics of continuous power supply, when there is fault information, it can display, store and upload the information in time. However, for CT self-powered relay protection devices, the wake-up is sudden, the operation time is short, and the fault information is easily lost during operation. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for recording and managing fault information of a CT self-powered relay protection device, so as to solve the problem that the fault information of the CT self-powered relay protection device is easily lost.

[0005] To achieve the above object, the solution of the present invention includes: A method for recording and managing fault information of a CT self-powered relay protection device of the present invention comprises the following steps: when the induced current reaches a set value and the CT self-powered relay protection device is awakened, determining whether a fault occurs in a detected circuit, generating fault information when a fault occurs, and storing the fault information; when the communication interface module of the CT self-powered relay protection device is opened, uploading all stored fault information.

[0006] Furthermore, before determining whether the communication interface module is open, it is determined whether the liquid crystal display module of the CT self-powered relay protection device is open, and when the liquid crystal display module is open, all stored fault information is displayed.

[0007] Furthermore, when storing the fault information, a to-be-displayed flag and a to-be-sent flag are set for the fault information, and the to-be-displayed flag of the fault information is cleared when the display is completed, and the to-be-sent flag of the fault information is cleared when the uploading is completed.

[0008] When the stored fault information is further uploaded, when the external power supply is not put into use, the battery power supply switch is closed to use the battery as a backup power supply for uploading the fault information, and the Tset time of the battery power supply is recorded. When the Tset time is greater than the time required to upload the fault information, the battery power supply switch is disconnected.

[0009] Furthermore, when the external power supply mode is put into use, the external power supply is used as a backup power supply for sending fault information.

[0010] A CT self-powered relay protection device fault information record management system, comprising a processor, wherein the processor executes a computer program to implement the following steps: When the induced current reaches the set value and the CT self-powered relay protection device is awakened, it is determined whether a fault occurs in the detected circuit, and fault information is generated and stored when a fault occurs; when the communication interface module of the CT self-powered relay protection device is opened, all stored fault information is sent up.

[0011] Furthermore, before determining whether the communication interface module is open, it is determined whether the liquid crystal display module of the CT self-powered relay protection device is open, and when the liquid crystal display module is open, all stored fault information is displayed.

[0012] Furthermore, when storing the fault information, a to-be-displayed flag and a to-be-sent flag are set for the fault information, and the to-be-displayed flag of the fault information is cleared when the display is completed, and the to-be-sent flag of the fault information is cleared when the uploading is completed.

[0013] When the stored fault information is further uploaded, when the external power supply is not put into use, the battery power supply switch is closed to use the battery as a backup power supply for uploading the fault information, and the Tset time of the battery power supply is recorded. When the Tset time is greater than the time required to upload the fault information, the battery power supply switch is disconnected.

[0014] Furthermore, when the external power supply mode is put into use, the external power supply is used as a backup power supply for sending fault information.

[0015] The beneficial effects of the present invention are as follows: the CT self-powered relay protection device will be awakened only when the induced current reaches the set value. Since the induced current is not stable and the power may be cut off at any time, the communication module may not be open (unavailable) due to insufficient power supply. The present invention uses the above-mentioned storage-before-use working logic. Each time the power is turned on, after the current state is judged for a fault, the corresponding fault information is first stored, and it is judged whether the communication module is open. If it is open, all currently stored fault reports are uploaded; if it is not open, or the upload fails, the fault information has also been stored, and the upload is attempted again when the next power supply meets the wake-up conditions, so that the fault information is not easily lost, thereby improving the system perception capability of the CT self-powered relay protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of a fault information recording and management method of a CT self-powered relay protection device provided by the present invention; Figure 2 The present invention provides a flow chart of a method for sending fault information to a power supply management system. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail in a clear and complete manner in conjunction with the accompanying drawings and embodiments.

[0018] The concept of the present invention is to process the fault information with priority, store the fault information first when there is any fault information, display the fault information when the liquid crystal module is open, and report the fault information when the communication interface module is open.

[0019] Method Example 1: like Figure 1 Shown is a flow chart of a fault information recording and management method for a CT self-powered relay protection device.

[0020] The fault information of the device adopts a store-before-use mechanism. The fault information queue sets a storage pointer, a display pointer, and an upload pointer to respectively manage the storage, display, and upload of the fault information. The fault information structure sets the status flags to be displayed and uploaded.

[0021] When a circuit fault occurs, the CT self-powered relay protection device generates an inductive current and is awakened to start working. First, the CT self-powered relay protection device will generate fault information and store the fault information. When the generated inductive current can support the operation of the LCD module, the fault information is displayed on the LCD module. When the generated inductive current can support the operation of the communication module, the fault information is sent up. When the generated current is not enough to support the opening of the LCD module, only storage is performed. When the generated current is not enough to support the opening of the communication module, only storage and display are performed.

[0022] If the generated induced current is large enough to support the entire process of fault information processing, the operation logic is as follows: Step 1: Fault information storage and processing. First, call the fault information storage function to store the original data of the fault information. The fault information is stored in the action report queue, and the status flags of "to be displayed" and "to be sent" are set.

[0023] Step 2: Fault information display processing: When the liquid crystal display module is in an open state, the fault information display processing function is called to scan and process the fault information to be displayed, and the to-be-displayed flag of the fault information structure is cleared after the display is completed.

[0024] Step 3: Fault information upload processing: When the communication interface module is in the open state, the report upload processing function is called to scan and process the report to be uploaded. After the upload is completed, the status flag of the fault information structure to be uploaded is cleared.

[0025] Specifically, when a fault occurs in the circuit, an action report is generated and added to the action report queue. The storage pointer points to the next location in the queue that can be used to store a new action report. The system stores the new action report at the location pointed to by the storage pointer and moves the storage pointer forward one position to make room for the next action report. At the same time, the to-be-displayed and to-be-sent status flags in the action report structure will be set to "to-be-displayed" and "to-be-sent", indicating that this action report has not yet been displayed or sent.

[0026] The system checks the position pointed by the display pointer, obtains the action report of the position, and displays it in the user interface or system log. After the display is completed, the system moves the display pointer forward one position to point to the next action report to be displayed. At the same time, the to-be-displayed status flag in the action report structure is cleared, indicating that the action report has been displayed.

[0027] The system checks the location pointed by the upload pointer, obtains the action report at that location, and sends it to the server, database, or other system for storage and analysis. After the upload is completed, the system moves the upload pointer forward one position to point to the next action report to be uploaded. At the same time, the pending upload status flag in the action report structure is cleared, indicating that the action report has been successfully uploaded.

[0028] When no fault occurs in the circuit and the CT self-powered relay protection device is awakened by the load current, if the load current can make the LCD display module work, if there is historical fault information that is not displayed, the historical fault information will be displayed on the LCD display module; if the load current can make the communication module work, if there is historical fault information that is not sent, the historical fault information will be sent.

[0029] Method Example 2: On the basis of Example 1, during the process of sending fault information, CT power supply is the main power supply system for sending faults, but because CT power supply is unstable, it is necessary to select other power supply modes as backup power supplies. The power management method when sending fault information is an implementable method as follows: like Figure 2 The figure shows a flow chart of a method for sending fault information to a power management system.

[0030] Step 1: CT power supply is the main power supply system and sends fault information to the upper part.

[0031] Step 2: When the external power supply is turned on, the external power supply is used as a backup power supply for sending the action report of the relay protection device. The external power supply can be a computer, a mobile power supply or a power adapter.

[0032] Step 3: When the external power supply is not turned on, close the battery power switch, turn on the battery power supply for Tset time, and use the battery power supply as the backup power supply for sending the action report. The Tset time is greater than the time required for sending the action report. When the action report is sent or Tset time is reached, turn off the battery power switch.

[0033] System Example: A CT self-powered relay protection device fault information record management system, including a processor. In order to solve the problem that the CT self-powered relay protection device wakes up suddenly, has a short operating time, and the communication module is not open during the operation process, resulting in the failure of uploading fault information, the CT self-powered relay protection device fault information record management system of this embodiment executes the CT self-powered relay protection device fault information record management method as described in the method embodiment, and the CT self-powered relay protection device fault information record management method has been described clearly enough in the method embodiment, and will not be repeated here.

Claims

1. A method for recording and managing fault information of a CT self-powered relay protection device, characterized in that: The method comprises the following steps: when the induced current reaches a set value and the CT self-powered relay protection device is awakened, determining whether a fault occurs in the detected circuit, generating fault information when a fault occurs, and storing the fault information; when the communication interface module of the CT self-powered relay protection device is opened, uploading all stored fault information.

2. The method for recording and managing fault information of a CT self-powered relay protection device according to claim 1, characterized in that: Before determining whether the communication interface module is open, it is determined whether the liquid crystal display module of the CT self-powered relay protection device is open, and when the liquid crystal display module is open, all stored fault information is displayed.

3. The method for recording and managing fault information of a CT self-powered relay protection device according to claim 2, characterized in that: When storing the fault information, a to-be-displayed flag and a to-be-sent flag are set for the fault information, and the to-be-displayed flag of the fault information is cleared when the display is completed, and the to-be-sent flag of the fault information is cleared when the uploading is completed.

4. The method for recording and managing fault information of a CT self-powered relay protection device according to claim 1, characterized in that: When sending the stored fault information, when the external power supply is not put into use, close the battery power supply switch to use the battery as the backup power supply for sending the fault information, record the Tset time of the battery power supply, and when the Tset time is greater than the time required to send the fault information, disconnect the battery power supply switch.

5. The method for recording and managing fault information of a CT self-powered relay protection device according to claim 1, characterized in that: When the external power supply mode is put into use, the external power supply is used as a backup power supply for sending fault information.

6. A CT self-powered relay protection device fault information record management system, comprising a processor, characterized in that: The processor executes the computer program to implement the following steps: When the induced current reaches the set value and the CT self-powered relay protection device is awakened, it is determined whether a fault occurs in the detected circuit, and fault information is generated and stored when a fault occurs; when the communication interface module of the CT self-powered relay protection device is opened, all stored fault information is sent up.

7. The CT self-powered relay protection device fault information record management system according to claim 6, characterized in that: Before determining whether the communication interface module is open, it is determined whether the liquid crystal display module of the CT self-powered relay protection device is open, and when the liquid crystal display module is open, all stored fault information is displayed.

8. The CT self-powered relay protection device fault information record management system according to claim 7, characterized in that: When storing the fault information, a to-be-displayed flag and a to-be-sent flag are set for the fault information, and the to-be-displayed flag of the fault information is cleared when the display is completed, and the to-be-sent flag of the fault information is cleared when the uploading is completed.

9. The CT self-powered relay protection device fault information record management system according to claim 6, characterized in that: When sending the stored fault information, when the external power supply is not put into use, close the battery power supply switch to use the battery as the backup power supply for sending the fault information, record the Tset time of the battery power supply, and when the Tset time is greater than the time required to send the fault information, disconnect the battery power supply switch.

10. The CT self-powered relay protection device fault information record management system according to claim 6, characterized in that: When the external power supply mode is put into use, the external power supply is used as a backup power supply for sending fault information.

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