CN115656875A - Power transmission and transformation system ground fault on-line detection system and method - Google Patents
Power transmission and transformation system ground fault on-line detection system and method Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application provides a system and a method for detecting ground fault of a power transmission and transformation system on line, comprising the following steps: the device comprises a fault identification module, a grounding judgment module, a judgment and check module and a positioning module; the fault identification module is used for receiving fault information, sending a fault judgment instruction according to the received fault information and sending fault alarm information; the grounding judgment module receives the fault judgment instruction, starts a grounding judgment program and calls fault information to judge the grounding fault; the judgment and check module is used for checking the result of the ground fault judgment, and the checking and check module is used for comparing the fault display result of the calling fault display with the ground fault judgment result to obtain a verification result; and the positioning module is used for positioning the position of the ground fault when the verification result is judged to be the ground fault. The application can greatly improve the accuracy of the detection result by mutually validating the cores of different detection devices, and simultaneously realizes the unified management of different detection devices.
Description
Technical Field
The application requests to protect a transmission network grounding detection technology, and particularly relates to an online detection system for a grounding fault of a power transmission and transformation system. The application also relates to an online detection method for the ground fault of the power transmission and transformation system.
Background
In order to detect the ground fault of the power transmission and transformation system, a large number of fault indicators, terminal detectors, etc. have been produced, wherein the application of the terminal detectors makes it possible to perform on-line fault determination and location of the power transmission line of the power distribution network.
In the prior art, the terminal detector is implemented by sending fault judgment information to the power distribution main station to judge the ground fault of the power transmission and transformation system, and the fault indicator is used for uploading waveform information to the power distribution main station to perform waveform judgment so as to determine whether the fault is the ground fault.
However, in the distribution network, the applications of various ground fault detection devices are not uniform, and the accuracy of the judgment of each device cannot reach one hundred percent, so that fault detection errors can be found out, and loss is caused.
Disclosure of Invention
The application provides a power transmission and transformation system ground fault on-line measuring system, includes: the device comprises a fault identification module, a grounding judgment module, a judgment and check module and a positioning module;
the fault identification module is used for receiving fault information, sending a fault judgment instruction according to the received fault information and sending fault alarm information;
the grounding judgment module receives the fault judgment instruction, starts a grounding judgment program and calls fault information to judge the grounding fault;
the judgment and check module is used for checking the result of the ground fault judgment, and the checking comprises calling a fault display result of a fault display to be compared with the ground fault judgment result to obtain a validation result;
and the positioning module is used for positioning the position of the ground fault when the verification result is judged to be the ground fault.
Optionally, the grounding determining module executes the following steps:
acquiring fault information, and sending the fault information to a power distribution main station for judging a ground fault;
and receiving a ground fault judgment result of the power distribution main station.
Optionally, the fault display includes a waveform recording type fault indicator and a non-waveform recording type fault indicator.
Optionally, the positioning module positions the fault occurrence section based on the fault information.
Optionally, the fault alarm information includes a text prompt, a language prompt and a light prompt.
The application provides an on-line detection method for ground faults of a power transmission and transformation system, which comprises the following steps:
receiving fault information, sending a fault judgment instruction according to the received fault information, and sending fault alarm information;
receiving the fault judgment instruction, starting a grounding judgment program, and calling fault information to judge the grounding fault;
checking the result of the ground fault judgment, including calling a fault display result of a fault display to be compared with the result of the ground fault judgment to obtain a validation result;
and when the verification result is judged to be the ground fault, positioning the position of the ground fault.
Optionally, the grounding judgment performs the following steps:
acquiring fault information, and sending the fault information to a power distribution main station for judging a ground fault;
and receiving a ground fault judgment result of the power distribution main station.
Optionally, the fault display includes a waveform recording type fault indicator and a non-waveform recording type fault indicator.
Optionally, the fault occurrence section is located based on the fault information.
Optionally, the fault alarm information includes a text prompt, a language prompt and a light prompt.
Compared with the prior art, the application has the advantages that:
the application provides a power transmission and transformation system ground fault on-line measuring system, includes: the device comprises a fault identification module, a grounding judgment module, a judgment and check module and a positioning module; the fault identification module is used for receiving fault information, sending a fault judgment instruction according to the received fault information and sending fault alarm information; the grounding judgment module receives the fault judgment instruction, starts a grounding judgment program and calls fault information to judge the grounding fault; the judgment and check module is used for checking the result of the ground fault judgment, and the checking comprises calling a fault display result of a fault display to be compared with the ground fault judgment result to obtain a validation result; and the positioning module is used for positioning the position of the ground fault when the validation result is judged to be the ground fault. The application can greatly improve the accuracy of the detection result by mutually validating the cores of different detection devices, and simultaneously realizes the unified management of different detection devices.
Drawings
Fig. 1 is a schematic diagram of an online ground fault detection system of a power transmission and transformation system in the present application.
Fig. 2 is a flowchart of the operation of the grounding judgment module in the present application.
Fig. 3 is a schematic diagram of a process of detecting a ground fault of a power transmission and transformation system on line in the present application.
Detailed Description
The following is an example of a specific implementation process provided for explaining the technical solutions to be protected in the present application in detail, but the present application may also be implemented in other ways than those described herein, and a person skilled in the art may implement the present application by using different technical means under the guidance of the idea of the present application, so that the present application is not limited by the following specific embodiments.
The application provides a power transmission and transformation system ground fault on-line measuring system, includes: the device comprises a fault identification module, a grounding judgment module, a judgment and check module and a positioning module; the fault identification module is used for receiving fault information, sending a fault judgment instruction according to the received fault information and sending fault alarm information; the grounding judgment module receives the fault judgment instruction, starts a grounding judgment program and calls fault information to judge the grounding fault; the judgment and check module is used for checking the result of the ground fault judgment, and the checking and check module is used for checking the result of the ground fault judgment, and comprises the steps of calling a fault display result of a fault display and comparing the fault display result with the ground fault judgment result to obtain a verification result; and the positioning module is used for positioning the position of the ground fault when the validation result is judged to be the ground fault. The application can greatly improve the accuracy of the detection result by mutually validating the cores of different detection devices, and simultaneously realizes the unified management of different detection devices.
Fig. 1 is a schematic diagram of an online ground fault detection system of a power transmission and transformation system in the present application.
Referring to fig. 1, the fault identification module 101 is configured to receive fault information, send a fault determination instruction according to the received fault information, and send fault alarm information;
the fault information includes voltage, current information, and voltage and current over time information. The fault identification module 101 detects the transmission line in real time and reacts when the fault information occurs.
The fault identification modules are provided with one or more than one, adaptive arrangement design can be carried out on the distance of the power transmission line according to the distribution of the power grid, and all the fault identification modules are connected to the identification controller so as to carry out unified fault identification.
Specifically, the fault identification module 101 is provided with a data forwarding unit, and the data forwarding unit performs data transmission in a wireless communication manner and transmits the data to a transfer device.
The relay device is arranged in a preset area and can receive data sent by the fault identification module 101. The transfer device is configured to receive data of the fault identification module 101 within a specific range, and transmit the data to a central station in a wireless or wired communication manner, where the central station is provided with a device for continuously processing the data acquired by the fault identification module.
After the collection of the fault information is completed, the fault identification module sends a fault judgment instruction to start the judgment of the fault information and send fault alarm information at the same time.
Referring to fig. 1, the grounding judgment module 102 receives the fault judgment instruction, starts a grounding judgment program, and calls fault information to perform grounding fault judgment.
The grounding judgment module is arranged in the transfer equipment, receives the fault information sent by the fault identification module 101, and after receiving a fault judgment instruction, analyzes and judges the fault information, including judging the fault type.
Fig. 2 is a flowchart of the operation of the grounding judgment module in the present application.
Referring to fig. 2, in step S201, fault information is acquired, and the fault information is sent to a power distribution master station to perform ground fault judgment;
s202, receiving a ground fault judgment result of the power distribution main station.
Specifically, the grounding determining module 102 does not determine the fault information by itself, and after receiving the fault determining instruction, sends the fault information to the power distribution main station to analyze and determine the information, and returns the result to the grounding determining module after obtaining the structure.
Further, the power distribution master station analyzes the fault information by adopting a cloud server, and in this case, the grounding judgment module does not need to process data, so that the equipment structure can be simplified, the cost of the grounding judgment module can be reduced, and a large amount of deployment can be realized.
After receiving the ground fault judgment result, selectively performing the next step according to the judgment result, wherein the method comprises the following steps of: and when the grounding judgment result is the grounding fault, checking the grounding fault, otherwise, checking and processing according to other types of faults.
Referring to fig. 1, the judgment and check module 103 is configured to check the result of the ground fault judgment, including calling a fault display result of a fault display to compare with the result of the ground fault judgment, so as to obtain a validation result.
Currently, the fault display can realize the judgment of the ground fault, so the ground fault judgment is directly obtained through the fault oscilloscope. Wherein, the fault display includes two kinds of recording waveform type fault indication and non-recording waveform fault indication, therefore the judging step includes:
judging a fault section according to a fault recording file of the fault recording type fault indicator;
and judging whether the fault indicator and the power distribution main station are mixed under the same bus or the same line, checking the fault judgment results of the fault indicator and the power distribution main station when the mixed condition occurs, and judging whether the fault indicator and the power distribution main station develop an interphase short circuit or not. The non-fault wave recording indicator needs to judge a corresponding fault section according to fault information.
In this application, after the grounding judgment result is transmitted to the grounding judgment module 102, the grounding judgment result and the fault information are sent to the judgment and check module 103 for grounding fault judgment.
The judgment and check module 103 retrieves data in the fault display and judges a fault judgment result of a waveform in the fault display to the fault oscilloscope, so as to realize check.
Referring to fig. 1, the positioning module 104 is configured to position the ground fault when the validation result is determined as the ground fault.
And the positioning module extracts the position information of the fault identification module in the fault information, and judges the section where the fault occurs according to the position information to realize fault positioning.
And finally, outputting the grounding fault information and the position information to finish the judgment of the grounding fault.
The application also provides an online detection method for the ground fault of the power transmission and transformation system, which can greatly improve the accuracy of the detection result and realize the unified management of different detection devices through mutual effect cores of different detection devices.
Fig. 3 is a schematic diagram of a process of detecting a ground fault of a power transmission and transformation system on line in the present application.
Referring to fig. 3, S301 receives the fault information, sends a fault determination instruction according to the received fault information, and sends a fault alarm message;
the fault information includes voltage, current information, and voltage and current over time information. The fault identification module 101 detects the transmission line in real time and reacts when the fault information occurs.
The fault identification modules are provided with one or more than one, adaptive arrangement design can be carried out on the distance of the power transmission line according to the distribution of the power grid, and all the fault identification modules are connected to the identification controller so as to carry out unified fault identification.
Specifically, the fault identification module 101 is provided with a data forwarding unit, and the data forwarding unit performs data transmission in a wireless communication manner and transmits the data to a transfer device.
The relay device is arranged in a preset area and can receive data sent by the fault identification module 101. The transfer device is configured to receive data of the fault identification module 101 within a specific range, and transmit the data to a central station in a wireless or wired communication manner, where the central station is provided with a device for continuously processing the data acquired by the fault identification module.
After the collection of the fault information is completed, the fault identification module sends a fault judgment instruction to start the judgment of the fault information and send fault alarm information at the same time.
Referring to fig. 3, S302 receives the fault determination instruction, starts a grounding determination procedure, and calls fault information to perform grounding fault determination.
The grounding judgment module is arranged in the transfer equipment, receives the fault information sent by the fault identification module 101, and after receiving a fault judgment instruction, analyzes and judges the fault information, including judging the fault type.
Referring to fig. 2, in step S201, fault information is acquired, and the fault information is sent to a power distribution master station to perform ground fault judgment;
s202, receiving a ground fault judgment result of the power distribution main station.
Specifically, the grounding judgment module 102 does not judge the fault information by itself, and after receiving the fault judgment instruction, the grounding judgment module sends the fault information to the distribution main station to analyze and judge the information, and returns the result to the grounding judgment module after obtaining the structure.
Further, the power distribution master station analyzes the fault information by adopting a cloud server, and in this case, the grounding judgment module does not need to process data, so that the equipment structure can be simplified, the cost of the grounding judgment module can be reduced, and a large amount of deployment can be realized.
After receiving the ground fault judgment result, selectively performing the next step according to the judgment result, wherein the method comprises the following steps: and when the grounding judgment result is the grounding fault, checking the grounding fault, otherwise, checking and processing according to other types of faults.
Referring to fig. 3, S303 checks the result of the ground fault determination, including comparing the fault display result of the calling fault display with the result of the ground fault determination, so as to obtain a validation result.
Currently, the fault display can realize the judgment of the ground fault, so the ground fault judgment is directly obtained through the fault oscilloscope. Wherein, the fault display includes two kinds of recording waveform type fault indication and non-recording waveform fault indication, therefore the judging step includes:
judging a fault section according to a fault recording file of the fault recording type fault indicator;
and judging whether the fault indicator and the power distribution main station are mixed under the same bus or the same line, checking the fault judgment results of the fault indicator and the power distribution main station when the mixed condition occurs, and judging whether the fault indicator and the power distribution main station develop an interphase short circuit or not. The non-fault wave recording indicator needs to judge a corresponding fault section according to fault information.
In this application, after the grounding judgment result is transmitted to the grounding judgment module 102, the grounding judgment result and the fault information are sent to the judgment and check module 103 for grounding fault judgment.
The judgment and check module 103 retrieves data in the fault display and judges a fault judgment result of a waveform in the fault display to the fault oscilloscope, so as to realize check.
Referring to fig. 3, in S304, when the validation result is determined as the ground fault, the location of the ground fault is located.
And the positioning module extracts the position information of the fault identification module in the fault information, and judges the section where the fault occurs according to the position information to realize fault positioning.
And finally, outputting the grounding fault information and the position information to finish the judgment of the grounding fault.
Claims (10)
1. An online detection system for ground fault of a power transmission and transformation system is characterized by comprising: the device comprises a fault identification module, a grounding judgment module, a judgment and check module and a positioning module;
the fault identification module is used for receiving fault information, sending a fault judgment instruction according to the received fault information and sending fault alarm information;
the grounding judgment module receives the fault judgment instruction, starts a grounding judgment program and calls fault information to judge the grounding fault;
the judgment and check module is used for checking the result of the ground fault judgment, and the checking comprises calling a fault display result of a fault display to be compared with the ground fault judgment result to obtain a validation result;
and the positioning module is used for positioning the position of the ground fault when the validation result is judged to be the ground fault.
2. The on-line detection system for ground fault of power transmission and transformation system according to claim 1, wherein the ground fault determining module performs the following steps:
acquiring fault information, and sending the fault information to a power distribution main station for judging a ground fault;
and receiving a ground fault judgment result of the power distribution main station.
3. The power transmission and transformation system ground fault on-line detection system of claim 1, wherein the fault display includes a recorded waveform fault indication and a non-recorded waveform fault indication.
4. The power transmission and transformation system ground fault on-line detection system of claim 1, wherein the location module locates a fault occurrence zone based on the fault information.
5. The on-line detection system for ground fault of power transmission and transformation system of claim 1, wherein the fault alarm information includes text prompt, language prompt and light prompt.
6. An on-line detection method for ground fault of a power transmission and transformation system is characterized by comprising the following steps:
receiving fault information, sending a fault judgment instruction according to the received fault information, and sending fault alarm information;
receiving the fault judgment instruction, starting a grounding judgment program, and calling fault information to judge the grounding fault;
checking the result of the ground fault judgment, including calling a fault display result of a fault display to be compared with the result of the ground fault judgment to obtain a validation result;
and when the verification result is judged to be the ground fault, positioning the position of the ground fault.
7. The online detection method for ground fault of power transmission and transformation system according to claim 6, wherein the grounding judgment is performed by the following steps:
acquiring fault information, and sending the fault information to a power distribution main station for judging a ground fault;
and receiving a ground fault judgment result of the power distribution main station.
8. The power transmission and transformation system ground fault on-line detection method of claim 6, wherein the fault display comprises a recorded waveform fault indication and a non-recorded waveform fault indication.
9. The power transmission and transformation system ground fault on-line detection method according to claim 6, characterized in that a fault occurrence section is located based on the fault information.
10. The on-line detection method for the ground fault of the power transmission and transformation system according to claim 6, wherein the fault alarm information comprises a text prompt, a language prompt and a light prompt.
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| CN202211402030.6A CN115656875A (en) | 2022-11-10 | 2022-11-10 | Power transmission and transformation system ground fault on-line detection system and method |
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Application publication date: 20230131 |
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