Transformer substation fault recording data monitoring method and system

Abstract

The invention relates to a transformer substation fault recording data monitoring method and system, and relates to the technical field of AAA, and the method comprises the steps: transmitting fault information and a time proofreading request to a monitoring server of a transformer substation when a fault recording device judges that a line has a fault based on the obtained current information and voltage; receiving time proofreading information sent by the monitoring server; the time proofreading information comprises a third timestamp t3 of the time proofreading information sent by the monitoring server; recording a fourth timestamp t4 when the time proofreading information is received; obtaining a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3 and the fourth timestamp t4; judging whether the first time difference delta T1 is greater than a first preset value or not; if yes, sending a moment correction request to the monitoring server; the time correction request is used for triggering the monitoring server to correct the time information in the fault information based on the first time difference delta T1.

Description

Technical Field

[0001] This application relates to the technical field of substation fault recording, and in particular to a method and system for monitoring substation fault recording data. Background Art

[0002] Fault recorders are used in power systems. When a system failure occurs, they can automatically and accurately record the changes in various electrical quantities during the processes before and after the failure. Through the analysis and comparison of these electrical quantities, they play an important role in analyzing and handling accidents, judging whether the protection operates correctly, and improving the safe operation level of the power system.

[0003] Currently, most fault recording devices do not have the function of automatic networking and cannot be calibrated in real time through automatic networking. It is easy to have inaccurate fault recording times, which may lead to errors in the analysis of electrical quantities. How to improve the accuracy of the time recording of fault recording devices is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] To at least partially solve the above technical problems, this application provides a method and system for monitoring substation fault recording data.

[0005] In a first aspect, the method for monitoring substation fault recording data provided by this application adopts the following technical solution.

[0006] A method for monitoring substation fault recording data includes:

[0007] When a fault recording device determines that a line has a fault based on the acquired current information and voltage, it sends a fault message and a time calibration request to the monitoring server of the substation; the time calibration request is sent simultaneously with the fault message; the time calibration request contains a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 when receiving the time calibration request;

[0008] Receiving the time calibration information sent by the monitoring server; the time calibration information contains a third timestamp t3 when the monitoring server sends the time calibration information;

[0009] Recording a fourth timestamp t4 when receiving the time calibration information;

[0010] Obtaining a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4;

[0011] Determine whether the first time difference ΔT1 is greater than a first preset value; if so, send a time correction request to the monitoring server; the time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

[0012] Optionally, if it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation message to the monitoring server; the time confirmation message is used to trigger the monitoring server to confirm the time information in the fault information.

[0013] Optionally, the method further includes:

[0014] Obtain a first corrected time T1 based on the first timestamp t1 and the first time difference ΔT1;

[0015] After the time information is corrected for the second time, obtain a second corrected time T2 and a fifth timestamp t5;

[0016] Obtain a time interval TP1 for two calibrations based on the first corrected time T1 and the second corrected time T2; TP1 = T2 - T1;

[0017] Obtain a time interval Tq1 based on the first timestamp t1 and the fifth timestamp t5;

[0018] After the time information is corrected for the nth time, calculate a correction coefficient a; where a = Tp n-1 / Tm n-1 ; n ≥ 2;

[0019] At the (n + 1)th time, when the fault recording device determines that a line fault occurs based on the acquired current information and voltage, correct the current time information Tt in the fault recording device to obtain a pre-corrected time information Tr; where Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t 4n+1 ; the t 4n+1 is the moment when the fault recording device sends the fault information to the monitoring server for the nth time;

[0020] Update the pre-corrected time information Tr to the time information when the fault recording device sends the fault information and the time calibration request to the substation monitoring server for the (n + 1)th time.

[0021] Optionally, the formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

[0022] Optionally, when updating the time information of the (n + 1)-th fault information and time calibration request sent by the fault recording device to the substation monitoring server with the pre-calibrated time information Tr, the method further includes: sending a time calibration request to the monitoring server.

[0023] In a second aspect, a substation fault recording data monitoring system provided by the present application adopts the following technical solution.

[0024] A substation fault recording data monitoring system, characterized in that

[0025] A first processing module, configured to: when the fault recording device determines that a line has a fault based on the acquired current information and voltage, send a fault information and a time calibration request to the substation monitoring server; the time calibration request is sent simultaneously with the fault information; the time calibration request includes a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 for receiving the time calibration request;

[0026] A second processing module, configured to: receive the time calibration information sent by the monitoring server; the time calibration information includes a third timestamp t3 when the monitoring server sends the time calibration information;

[0027] A third processing module, configured to: record a fourth timestamp t4 for receiving the time calibration information;

[0028] A fourth processing module, configured to: obtain a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4;

[0029] A fifth processing module, configured to: determine whether the first time difference ΔT1 is greater than a first preset value; if so, send a time correction request to the monitoring server; the time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

[0030] Optionally, the system further includes: a sixth processing module; the sixth processing module is configured to: if it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation message to the monitoring server; the time confirmation message is used to trigger the monitoring server to confirm the time information in the fault information.

[0031] Optionally, the system further includes: a seventh processing module, and the seventh processing module is configured to: obtain a first calibrated time T1 based on the first timestamp t1 and the first time difference ΔT1;

[0032] After the second correction of the time information, the second corrected time T2 and the fifth timestamp t5 are obtained;

[0033] Based on the first corrected time T1 and the second corrected time T2, the time interval TP1 between the two calibrations is obtained; TP1 = T2 - T1;

[0034] Based on the first timestamp t1 and the fifth timestamp t5, the time interval Tq1 is obtained;

[0035] After the nth correction of the time information, the correction coefficient a is calculated; where a = Tpn-1 / Tmn-1; n≥2;

[0036] At the (n + 1)th time, when the fault recording device determines that a line fault occurs based on the acquired current information and voltage, the current time information Tt in the fault recording device is corrected to obtain the pre-corrected time information Tr; where Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t4n+1; the t4n+1 is the moment when the fault recording device sends fault information to the monitoring server for the nth time;

[0037] The pre-corrected time information Tr is used to update the time information when the fault recording device sends fault information and a time calibration request to the monitoring server of the substation for the (n + 1)th time.

[0038] Optionally, the formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

[0039] Optionally, when updating the time information when the fault recording device sends fault information and a time calibration request to the monitoring server of the substation for the (n + 1)th time with the pre-corrected time information Tr, it further includes: sending a time calibration request to the monitoring server. Description of the Drawings

[0040] Figure 1 is a flowchart of a method for monitoring substation fault recording data according to an embodiment of the present application;

[0041] Figure 2 is a system block diagram of a substation fault recording data monitoring system according to an embodiment of the present application;

[0042] In the figure, 201, the first processing module; 202, the second processing module; 203, the third processing module; 204, the fourth processing module; 205, the fifth processing module; 206, the sixth processing module; 207, the seventh processing module. Detailed Embodiments

[0043] The following combines the attachedFigure 1-2 The following further describes the present application with specific embodiments:

[0044] First of all, it should be noted here that in the description of the present application, when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other orientation words appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present application; in addition, when terms such as "first", "second", "third" and other numerical quantifiers appear, they are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the present application, unless otherwise clearly specified and limited, when terms such as "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an interference fit, a transition fit and other limit connections, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; therefore, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] An embodiment of the present application discloses a method for monitoring substation fault recording data. Refer to Figure 1 , as an implementation manner of a method for monitoring substation fault recording data, a method for monitoring substation fault recording data includes the following steps:

[0046] Step 101: When the fault recording device determines that a line fault occurs based on the acquired current information and voltage, send a fault information and a time calibration request to the monitoring server of the substation; the time calibration request is sent simultaneously with the fault information; the time calibration request contains a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 when receiving the time calibration request.

[0047] Step 102: Receive the time calibration information sent by the monitoring server; the time calibration information contains a third timestamp t3 when the monitoring server sends the time calibration information.

[0048] Step 103: Record a fourth timestamp t4 when receiving the time calibration information.

[0049] Step 104: Obtain a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4.

[0050] Step 105: Determine whether the first time difference ΔT1 is greater than a first preset value; if so, send a time correction request to the monitoring server; the time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

[0051] As a specific implementation of a substation fault recording data monitoring method, if it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation message to the monitoring server; the time confirmation message is used to trigger the monitoring server to confirm the time information in the fault information.

[0052] Specifically.

[0053] As a specific implementation of a substation fault recording data monitoring method, the method further includes:

[0054] Obtain a first corrected time T1 based on the first timestamp t1 and the first time difference ΔT1;

[0055] After the second time information correction, obtain a second corrected time T2 and a fifth timestamp t5;

[0056] Obtain a time interval TP1 for two calibrations based on the first corrected time T1 and the second corrected time T2; TP1 = T2 - T1;

[0057] Obtain a time interval Tq1 based on the first timestamp t1 and the fifth timestamp t5;

[0058] After the nth time information correction, calculate a correction coefficient a; where a = Tp n-1 / Tm n-1 ;

[0059] n ≥ 2;

[0060] At the (n + 1)th time, when the fault recording device determines that a line fault occurs based on the acquired current information and voltage, correct the current time information Tt in the fault recording device to obtain a pre-corrected time information Tr; where Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t 4n+1 ; the t 4n+1 is the moment when the fault recording device sends the fault information to the monitoring server for the nth time;

[0061] Update the pre-corrected time information Tr to the time information when the fault recording device sends the fault information and the time calibration request to the substation monitoring server for the (n + 1)th time.

[0062] As a specific implementation of a substation fault recording data monitoring method, the formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

[0063] As one of the implementation manners of a substation fault recording data monitoring method, when updating the time information of the (n + 1)-th time that the fault recording device sends the fault information and the time calibration request to the monitoring server of the substation with the pre-calibrated time information Tr, the method further includes: sending a time calibration request to the monitoring server.

[0064] This application also provides a substation fault recording data monitoring system, including:

[0065] A first processing module 201, configured to: when the fault recording device determines that a line fails based on the acquired current information and voltage, send a fault information and a time calibration request to the monitoring server of the substation; the time calibration request is sent simultaneously with the fault information; the time calibration request includes a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 for receiving the time calibration request;

[0066] A second processing module 202, configured to: receive the time calibration information sent by the monitoring server; the time calibration information includes a third timestamp t3 when the monitoring server sends the time calibration information;

[0067] A third processing module 203, configured to: record a fourth timestamp t4 for receiving the time calibration information;

[0068] A fourth processing module 204, configured to: obtain a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4;

[0069] A fifth processing module 205, configured to: determine whether the first time difference ΔT1 is greater than a first preset value; if so, send a time correction request to the monitoring server; the time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

[0070] As one of the implementation manners of a substation fault recording data monitoring method, the system further includes: a sixth processing module 206; the sixth processing module is configured to: if it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation message to the monitoring server; the time confirmation message is used to trigger the monitoring server to confirm the time information in the fault information.

[0071] As one implementation of a substation fault recording data monitoring method, the system further includes: a seventh processing module 207, and the seventh processing module is configured to: obtain a first corrected time T1 based on the first timestamp t1 and the first time difference ΔT1;

[0072] After the time information is corrected for the second time, a second corrected time T2 and a fifth timestamp t5 are obtained;

[0073] Based on the first corrected time T1 and the second corrected time T2, the time interval TP1 between the two calibrations is obtained; TP1 = T2 - T1;

[0074] Based on the first timestamp t1 and the fifth timestamp t5, the time interval Tq1 is obtained;

[0075] After the time information is corrected for the nth time, a correction coefficient a is calculated; where a = Tpn-1 / Tmn-1; n ≥ 2;

[0076] At the (n + 1)th time, when the fault recording device determines that a line fault occurs based on the acquired current information and voltage, the current time information Tt in the fault recording device is corrected to obtain a pre-corrected time information Tr; where Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t4n+1; the t4n+1 is the moment when the fault recording device sends fault information to the monitoring server for the nth time;

[0077] Update the time information of the (n + 1)th time when the fault recording device sends fault information and a time calibration request to the monitoring server of the substation with the pre-corrected time information Tr.

[0078] As one implementation of a substation fault recording data monitoring method, the formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

[0079] As one implementation of a substation fault recording data monitoring method, when updating the time information of the (n + 1)th time when the fault recording device sends fault information and a time calibration request to the monitoring server of the substation with the pre-corrected time information Tr, it further includes: sending a time calibration request to the monitoring server.

[0080] It should be noted that the above embodiments are only used to illustrate the present application and do not limit the technical solutions described in the present application. Although the present specification has described the present application in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the art can still modify the present application or make equivalent substitutions, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A method for monitoring substation fault recording data, characterized in that Including: When the fault recording device determines that a line fault has occurred based on the acquired current information and voltage, send a fault information and time calibration request to the monitoring server of the substation; The time calibration request is sent simultaneously with the fault information; the time calibration request contains a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 when receiving the time calibration request; Receive the time calibration information sent by the monitoring server; The time calibration information contains a third timestamp t3 when the monitoring server sends the time calibration information; Record a fourth timestamp t4 when receiving the time calibration information; Obtain a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4; Determine whether the first time difference ΔT1 is greater than a first preset value; If so, send a time correction request to the monitoring server; The time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

2. The substation fault recording data monitoring method according to claim 1, characterized in that, If it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation message to the monitoring server; the time confirmation message is used to trigger the monitoring server to confirm the time information in the fault information.

3. A substation fault recording data monitoring method according to claim 2, characterized in that The method further includes: Obtain a first calibrated time T1 based on the first timestamp t1 and the first time difference ΔT1; After the second time information correction, obtain a second calibrated time T2 and a fifth timestamp t5; Obtain a time interval TP1 for two calibrations based on the first calibrated time T1 and the second calibrated time T2; TP1 = T2 - T1; Obtain a time interval Tq1 based on the first timestamp t1 and the fifth timestamp t5; After the nth correction of the time information, a correction coefficient a is calculated; where a = Tp n-1 / Tm n-1 ; n ≥ 2; At the (n + 1)-th time, when the fault recording device determines that a fault has occurred in the line based on the acquired current information and voltage, the current time information Tt in the fault recording device is corrected to obtain pre-corrected time information Tr; where Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t 4n+1 ; the t 4n+1 is the moment when the fault recording device sent the fault information to the monitoring server at the n-th time; Update the time information of the (n + 1)-th time when the fault recording device sends a fault information and time calibration request to the monitoring server of the substation with the pre-calibrated time information Tr.

4. A substation fault recording data monitoring method according to claim 3, characterized in that The formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

5. A substation fault recording data monitoring method according to claim 4, characterized in that, When updating the time information of the (n + 1)-th time when the fault recording device sends a fault information and time calibration request to the monitoring server of the substation with the pre-calibrated time information Tr, the method further includes: sending a time calibration request to the monitoring server.

6. A substation fault recording data monitoring system, characterized in that A first processing module, configured to: when the fault recording device determines that a line fault has occurred based on the acquired current information and voltage, send a fault information and time calibration request to the monitoring server of the substation; the time calibration request is sent simultaneously with the fault information; the time calibration request contains a first timestamp t1; the time calibration request is used to trigger the monitoring server to record a second timestamp t2 when receiving the time calibration request; A second processing module, configured to: receive the time calibration information sent by the monitoring server; the time calibration information includes a third timestamp t3 when the monitoring server sends the time calibration information. A third processing module, configured to: record a fourth timestamp t4 when the time calibration information is received. A fourth processing module, configured to: obtain a first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4. A fifth processing module, configured to: determine whether the first time difference ΔT1 is greater than a first preset value. If so, send a time correction request to the monitoring server. The time correction request is used to trigger the monitoring server to correct the time information in the fault information based on the first time difference ΔT1.

7. A substation fault recording data monitoring system according to claim 6, characterized in that, The system further includes: a sixth processing module; the sixth processing module is configured to: if it is determined that the first time difference ΔT1 is not greater than the first preset value, send a time confirmation information to the monitoring server; the time confirmation information is used to trigger the monitoring server to confirm the time information in the fault information.

8. A substation fault recording data monitoring system according to claim 7, characterized in that, The system further includes: a seventh processing module, the seventh processing module is configured to: obtain a first corrected time T1 based on the first timestamp t1 and the first time difference ΔT1. After the time information is corrected for the second time, a second corrected time T2 and a fifth timestamp t5 are obtained. Based on the first corrected time T1 and the second corrected time T2, obtain the time interval TP1 between two calibrations; TP1 = T2 - T1. Based on the first timestamp t1 and the fifth timestamp t5, obtain the time interval Tq1. After the time information is corrected for the nth time, calculate a correction coefficient a; where a = Tpn-1 / Tmn-1; n≥2. At the (n + 1)th time, when the fault recording device determines that a line fault occurs based on the acquired current information and voltage, correct the current time information Tt in the fault recording device to obtain a pre-corrected time information Tr; where, Tr = Tt + a * ΔTt; where ΔTt is the time difference between Tt and t4n+1; the t4n+1 is the time when the fault recording device sends the fault information to the monitoring server for the nth time. Update the pre-corrected time information Tr to the time information when the fault recording device sends the fault information and the time calibration request to the substation monitoring server for the (n + 1)th time.

9. The substation fault recording data monitoring system according to claim 8, wherein, The formula for obtaining the first time difference T1 based on the first timestamp t1, the second timestamp t2, the third timestamp t3, and the fourth timestamp t4 is: T1 = ((t2 - t1) + (t3 - t4)) / 2.

10. A substation fault recording data monitoring system according to claim 9, characterized in that, When updating the pre-corrected time information Tr to the time information when the fault recording device sends the fault information and the time calibration request to the substation monitoring server for the (n + 1)th time, it further includes: sending a time calibration request to the monitoring server.

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