CN111458590A - Fault detection system of power distribution network - Google Patents

Fault detection system of power distribution network Download PDF

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Publication number
CN111458590A
CN111458590A CN202010319190.9A CN202010319190A CN111458590A CN 111458590 A CN111458590 A CN 111458590A CN 202010319190 A CN202010319190 A CN 202010319190A CN 111458590 A CN111458590 A CN 111458590A
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CN
China
Prior art keywords
distribution network
power distribution
current
fault
fault detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010319190.9A
Other languages
Chinese (zh)
Inventor
张建玺
李明春
丁建武
杨志东
陈京
齐清
于宏海
徐剑
代贵生
关涛
陈广久
盛萌
栾逢时
张皓
康晓婧
王均艳
谢萌
杨迪
刘金鑫
许方晨
徐航
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Beijing Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202010319190.9A priority Critical patent/CN111458590A/en
Publication of CN111458590A publication Critical patent/CN111458590A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The application discloses fault detection system of distribution network. Wherein, the method comprises the following steps: the data monitoring device is arranged in the power distribution network and used for detecting the current in the power distribution network in real time; the information storage device is connected with the data monitoring device and used for generating a high-frequency signal and injecting the high-frequency signal into the power distribution network under the condition that the current in the power distribution network rises to a preset threshold value and the duration time reaches a preset duration time; the fault detection device is arranged in the power distribution network and used for determining that the power distribution network has faults and sending the current containing the high-frequency signals to the positioning device under the condition that the current in the power distribution network is detected to contain the high-frequency signals; and the positioning device is used for processing the current containing the high-frequency signal, determining the position information of the power distribution network with the fault, and sending the position information to the monitoring center. The technical problem that the fault point of the power distribution network, which breaks down, cannot be accurately positioned by the conventional power distribution network fault detection system is solved.

Description

Fault detection system of power distribution network
Technical Field
The application relates to the field of power distribution network fault detection, in particular to a fault detection system of a power distribution network.
Background
In the operation of electromechanical equipment, common faults are easy to occur at the line connection positions of the bus and other equipment, and the line operation is interrupted. Secondly, when a certain section of line of a certain loop of the electrical equipment is in fault in operation, the line is disconnected, the current in the circuit is blocked, and the related elements of the electromechanical equipment are in abnormal conditions. Whatever the line problem, the whole electromechanical working system is influenced to a certain extent. In addition, the long-time operation may overheat the device to cause operation failure, thereby causing breakdown of the whole system. The failure of the device due to heat generation is mainly caused by excessive voltage or current.
The existing power distribution network fault detection system cannot accurately locate fault points of a power distribution network.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a fault detection system of a power distribution network, and the technical problem that the fault point of the power distribution network, which has a fault, cannot be accurately positioned by the existing power distribution network fault detection system is at least solved.
According to an aspect of an embodiment of the present application, there is provided a fault detection system for a power distribution network, including: the data monitoring device is arranged in the power distribution network and used for detecting the current in the power distribution network in real time; the information storage device is connected with the data monitoring device and used for generating a high-frequency signal and injecting the high-frequency signal into the power distribution network under the condition that the current in the power distribution network rises to a preset threshold value and the duration time reaches a preset duration time; the fault detection device is arranged in the power distribution network and used for determining that the power distribution network has faults and sending the current containing the high-frequency signals to the positioning device under the condition that the current in the power distribution network is detected to contain the high-frequency signals; and the positioning device is used for processing the current containing the high-frequency signal, determining the position information of the power distribution network with the fault, and sending the position information to the monitoring center.
Optionally, the positioning device includes a GPRS module, and the GPRS module is configured to acquire location information of the power distribution network with the fault.
Optionally, the data monitoring device comprises: the data acquisition module is used for acquiring current in a power distribution network, the data processing module is used for compressing the current acquired by the data acquisition module, and the data transmission module is used for transmitting the data processed by the data processing module to the information storage device.
Optionally, the fault detection system further comprises a data forwarding device, and the fault detection device sends the current containing the high-frequency signal to the positioning device through the data forwarding device.
Optionally, the data forwarding device includes a fault storage module, and the fault storage module is configured to store fault current peaks, where the fault current peaks include a fundamental peak and a fifth harmonic threshold.
Optionally, the data monitoring device further comprises: the system comprises a temperature sensor, an air volume sensor and a water immersion sensor, wherein the temperature sensor is used for monitoring the temperature of a line in the power distribution network, the air volume sensor is used for monitoring the size of wind power, and the water immersion sensor is used for monitoring the moisture on the surface of the line in the power distribution network.
Optionally, the data monitoring device is further configured to send data monitored by the temperature sensor, the air volume sensor, and the immersion sensor to the monitoring center.
Optionally, the fault detection system further comprises: the lightning stroke monitoring device is arranged in the power distribution network and used for monitoring transient traveling waves of fault currents in the power distribution network when lightning stroke faults exist.
Optionally, the fault detection system further comprises a signal amplification module, and the signal amplification module is configured to amplify a current value in the power distribution network in which the fault occurs.
Optionally, the monitoring center includes a communication module, and the communication module is configured to receive the location information of the power distribution network with the fault, and send the location information of the power distribution network with the fault to the maintenance center.
In an embodiment of the present application, a fault detection system for a power distribution network is provided, including: the data monitoring device is arranged in the power distribution network and used for detecting the current in the power distribution network in real time; the information storage device is connected with the data monitoring device and used for generating a high-frequency signal and injecting the high-frequency signal into the power distribution network under the condition that the current in the power distribution network rises to a preset threshold value and the duration time reaches a preset duration time; the fault detection device is arranged in the power distribution network and used for determining that the power distribution network has faults and sending the current containing the high-frequency signals to the positioning device under the condition that the current in the power distribution network is detected to contain the high-frequency signals; the positioning device is used for processing the current containing the high-frequency signal, determining the position information of the power distribution network with a fault, and sending the position information to the monitoring center, so that the fault point on the power distribution network can be conveniently and quickly and accurately positioned, the operating personnel can rapidly maintain the power distribution network, the technical effect of economic loss caused by loss of the power distribution network is reduced, and the technical problem that the fault point of the power distribution network with the fault cannot be accurately positioned by the conventional power distribution network fault detection system is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of a fault detection system for a power distribution network according to an embodiment of the present application;
FIG. 2 is a block diagram of another fault detection system for a power distribution network in accordance with an embodiment of the present application;
fig. 3 is a block diagram of another fault detection system for a power distribution network in accordance with an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a block diagram of a fault detection system for an electrical distribution network according to an embodiment of the present application, as shown in fig. 1, the system including:
the data monitoring device 10 is arranged in the power distribution network and used for detecting the current in the power distribution network in real time;
in an alternative embodiment according to the present application, the data monitoring device 10 may also detect a voltage in the power distribution network.
The information storage device 12 is connected with the data monitoring device 10 and is used for generating a high-frequency signal and injecting the high-frequency signal into the power distribution network under the condition that the current in the power distribution network rises to a preset threshold value and the duration time reaches a preset duration time;
according to an alternative embodiment of the present application, after information storage device 12 detects that the current has risen to the set value through the variable load and lasts for 5 seconds, it controls the internal current alternator to operate to generate a high frequency current (i.e., the high frequency signal) and inject the high frequency current into the distribution network.
It should be noted that the preset time period can be set and modified according to specific requirements.
The fault detection device 14 is arranged in the power distribution network and used for determining that the power distribution network has a fault when detecting that the current in the power distribution network contains a high-frequency signal, and sending the current containing the high-frequency signal to the positioning device 16;
and the positioning device 16 is used for processing the current containing the high-frequency signal, determining the position information of the power distribution network with the fault, and sending the position information to the monitoring center.
According to an optional embodiment of the application, the monitoring center receives the position information of the power distribution network with the fault, then network topology calculation analysis is carried out, geographical position information of the fault point is directly displayed, the monitoring center sends the fault information to the terminal, and the terminal is connected with the maintenance center through the communication network.
According to an alternative embodiment of the present application, the positioning device 16 comprises a GPRS module for acquiring location information of the failed distribution network. The positioning device 16 includes a GPRS module, which is connected to the satellite through a communication network and used for feeding back the fault point information of the distribution line.
In an alternative embodiment of the present application, the data monitoring device 10 comprises: the data processing device comprises a data acquisition module, a data processing module and a data transmission module, wherein the data acquisition module is used for acquiring current in the power distribution network, the data processing module is used for compressing the current acquired by the data acquisition module, and the data transmission module is used for transmitting data processed by the data processing module to the information storage device 12.
Fig. 2 is a block diagram of another fault detection system for an electrical distribution network according to an embodiment of the present application, and as shown in fig. 2, the system further includes a data forwarding device 18, and the fault detection device 14 sends a current containing a high frequency signal to the positioning device 16 through the data forwarding device 18.
According to an alternative embodiment of the present application, the data forwarding device 18 includes a fault storage module for storing fault current peaks, which include a fundamental peak and a fifth harmonic threshold.
In an alternative embodiment of the present application, the data monitoring device 10 further comprises: the system comprises a temperature sensor, an air volume sensor and a water immersion sensor, wherein the temperature sensor is used for monitoring the temperature of a line in the power distribution network, the air volume sensor is used for monitoring the size of wind power, and the water immersion sensor is used for monitoring the moisture on the surface of the line in the power distribution network.
According to an alternative embodiment of the present application, the data monitoring device 10 is further configured to send the data monitored by the temperature sensor, the air volume sensor and the immersion sensor to the monitoring center.
The temperature of the line in the power distribution network, the wind power size of the area where the power distribution network is located and the moisture on the surface of the line in the power distribution network are detected in real time, so that the environmental information of the area where the power distribution network is located can be monitored in real time.
Fig. 3 is a block diagram of another fault detection system for a power distribution network according to an embodiment of the present application, and as shown in fig. 3, the fault detection system further includes: and the lightning stroke monitoring device 110 is arranged in the power distribution network and used for monitoring the transient traveling wave of the fault current in the power distribution network when a lightning stroke fault exists.
According to an optional embodiment of the present application, the fault detection system further includes a signal amplification module, where the signal amplification module is configured to amplify a current value in the power distribution network in which the fault occurs.
The signal amplification module can also amplify the voltage value in the power distribution network with faults.
In an optional embodiment of the present application, the monitoring center includes a communication module, and the communication module is configured to receive the location information of the power distribution network with the fault, and send the location information of the power distribution network with the fault to the maintenance center.
Through the system, the fault point on the power distribution network can be conveniently and quickly and accurately positioned, so that an operator can rapidly maintain the power distribution network, and the technical effect of economic loss caused by loss of the power distribution network is reduced.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
It should be understood that the technical solutions of the present application, in essence or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of a software product stored in a storage medium, which includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) to execute all or part of the steps of the methods described in the embodiments of the present application.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims (10)

1. A fault detection system for an electrical distribution network, comprising:
the data monitoring device is arranged in the power distribution network and used for detecting the current in the power distribution network in real time;
the information storage device is connected with the data monitoring device and used for generating a high-frequency signal and injecting the high-frequency signal into the power distribution network under the condition that the current in the power distribution network rises to a preset threshold value and the duration time reaches a preset duration time;
the fault detection device is arranged in the power distribution network and used for determining that the power distribution network has a fault and sending the current containing the high-frequency signal to the positioning device under the condition that the current in the power distribution network is detected to contain the high-frequency signal;
and the positioning device is used for processing the current containing the high-frequency signal, determining the position information of the power distribution network with a fault, and sending the position information to a monitoring center.
2. The fault detection system of claim 1, wherein the locating means comprises a GPRS module for obtaining location information of the power distribution network where the fault occurred.
3. The fault detection system of claim 1, wherein the data monitoring device comprises: the data acquisition module is used for acquiring current in the power distribution network, the data processing module is used for compressing the current acquired by the data acquisition module, and the data transmission module is used for transmitting the data processed by the data processing module to the information storage device.
4. The fault detection system of claim 1, further comprising a data forwarding device through which the fault detection device sends a current containing the high frequency signal to the locating device.
5. The fault detection system of claim 4, wherein the data forwarding device includes a fault storage module to store fault current peaks, the fault current peaks including a fundamental peak and a fifth harmonic threshold.
6. The fault detection system of claim 1, wherein the data monitoring device further comprises: the temperature sensor is used for monitoring the temperature of a line in the power distribution network, the air quantity sensor is used for monitoring the wind power, and the water immersion sensor is used for monitoring the moisture on the surface of the line in the power distribution network.
7. The fault detection system of claim 6, wherein the data monitoring device is further configured to send data monitored by the temperature sensor, the air volume sensor, and the submergence sensor to the monitoring center.
8. The fault detection system of claim 1, further comprising: and the lightning stroke monitoring device is arranged in the power distribution network and used for monitoring the transient traveling wave of the fault current in the power distribution network when a lightning stroke fault exists.
9. The fault detection system of claim 1, further comprising a signal amplification module for amplifying current values in the power distribution network that have failed.
10. The fault detection system of claim 1, wherein the monitoring center comprises a communication module configured to receive location information of the power distribution network that has failed and to send the location information of the power distribution network that has failed to a maintenance center.
CN202010319190.9A 2020-04-21 2020-04-21 Fault detection system of power distribution network Pending CN111458590A (en)

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Application Number Priority Date Filing Date Title
CN202010319190.9A CN111458590A (en) 2020-04-21 2020-04-21 Fault detection system of power distribution network

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112595933A (en) * 2021-03-08 2021-04-02 国网山东省电力公司昌乐县供电公司 Power distribution network fault positioning system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435909A (en) * 2011-09-09 2012-05-02 北京天利继保自动化技术有限公司 Distribution network fault location detecting system
CN203012073U (en) * 2012-12-31 2013-06-19 广东电网公司电力科学研究院 Power distribution network line fault positioning system
CN104764970A (en) * 2015-04-22 2015-07-08 国家电网公司 Power distribution fault judgment method based on real-time topology
CN107329043A (en) * 2017-06-26 2017-11-07 国网江苏省电力公司苏州供电公司 Distribution line data acquisition and On-line Fault monitoring system
CN111007363A (en) * 2019-12-27 2020-04-14 广东电网有限责任公司电力科学研究院 Transmission line fault monitoring device, method and equipment and storage medium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435909A (en) * 2011-09-09 2012-05-02 北京天利继保自动化技术有限公司 Distribution network fault location detecting system
CN203012073U (en) * 2012-12-31 2013-06-19 广东电网公司电力科学研究院 Power distribution network line fault positioning system
CN104764970A (en) * 2015-04-22 2015-07-08 国家电网公司 Power distribution fault judgment method based on real-time topology
CN107329043A (en) * 2017-06-26 2017-11-07 国网江苏省电力公司苏州供电公司 Distribution line data acquisition and On-line Fault monitoring system
CN111007363A (en) * 2019-12-27 2020-04-14 广东电网有限责任公司电力科学研究院 Transmission line fault monitoring device, method and equipment and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112595933A (en) * 2021-03-08 2021-04-02 国网山东省电力公司昌乐县供电公司 Power distribution network fault positioning system and method

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