CN112595933A - Power distribution network fault positioning system and method - Google Patents

Power distribution network fault positioning system and method Download PDF

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Publication number
CN112595933A
CN112595933A CN202110248420.1A CN202110248420A CN112595933A CN 112595933 A CN112595933 A CN 112595933A CN 202110248420 A CN202110248420 A CN 202110248420A CN 112595933 A CN112595933 A CN 112595933A
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CN
China
Prior art keywords
fault
power distribution
distribution network
data
matched
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
CN202110248420.1A
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Chinese (zh)
Inventor
王晖
周逸玮
黄佳丽
张�杰
李娜
赵磊
于明
郑书林
庞伟华
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
Changle Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Changle Power Supply Co of State Grid Shandong 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, Changle Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202110248420.1A priority Critical patent/CN112595933A/en
Publication of CN112595933A publication Critical patent/CN112595933A/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
    • 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
    • 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 invention relates to a power distribution network fault positioning system and a method, which comprises the following steps: the data monitoring module is provided with monitoring equipment and is used for monitoring current information and voltage information in the power distribution network; the monitoring data judgment module is used for setting threshold ranges of current values and voltage values and judging whether the monitoring data are normal or not; the high-voltage pulse signal generation module is used for generating a high-voltage pulse signal and injecting the high-voltage pulse signal into the power distribution network if the current value exceeds a set threshold range, and meanwhile, the current value and the voltage value are transmitted into the matching comparison module; the fault monitoring module is used for monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault and sending the current containing the high-voltage pulse signal to the fault positioning module; the fault positioning module is used for processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults and sending the position information to the remote monitoring center; and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.

Description

Power distribution network fault positioning system and method
Technical Field
The invention belongs to the technical field of distribution automation, and particularly relates to power distribution network fault positioning
A system and method.
Background
With the rapid development of economy in China, the normal operation of a power supply system is very important for the development of various industries, and in the actual power supply process, faults occur during power supply due to external influence factors and internal equipment factors, so that the life and work of people are seriously influenced.
In the operation of the power distribution network, common faults mainly concentrate on poor line contact or line disconnection, which causes current or voltage change in the line, influences power supply equipment, and leads to partial paralysis of the power distribution network. At present, the fault of the power distribution network is not recovered in time under the conditions of low fault positioning accuracy and positioning delay, so that economic loss is caused. This is a disadvantage in the prior art.
In view of this, the present invention provides a system and a method for locating a fault in a power distribution network, so as to solve the defects in the prior art.
Disclosure of Invention
The invention aims to provide a power distribution network fault positioning system and method aiming at the defects of low fault positioning accuracy and delay of a power distribution network in the prior art so as to solve the technical problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a power distribution network fault location system, comprising:
the data monitoring module is provided with monitoring equipment and is used for monitoring current information and voltage information in the power distribution network;
the monitoring data judgment module is used for setting threshold ranges of current values and voltage values and judging whether the monitoring data are normal or not;
the high-voltage pulse signal generation module is used for generating a high-voltage pulse signal and injecting the high-voltage pulse signal into the power distribution network if the current value exceeds a set threshold range, and meanwhile, the current value and the voltage value are transmitted into the matching comparison module;
the fault monitoring module is used for monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault and sending the current containing the high-voltage pulse signal to the fault positioning module;
the fault positioning module is used for processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults and sending the position information to the remote monitoring center;
and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.
Preferably, the monitoring device arranged in the data monitoring module comprises a current monitoring meter and a voltage monitoring meter.
Preferably, the fault positioning module transmits the position information through a GPRS wireless communication network; the GPRS has wide coverage area and high data transmission efficiency.
Preferably, the power distribution network fault positioning system further comprises a fault information module, and the fault information module is used for storing historical fault information of the power distribution network.
Preferably, the matching comparison module is used for matching and comparing the data to be matched with the historical fault data of the power distribution network stored in the fault information module by using the current value and the voltage value as the data to be matched, obtaining the fault type according to the matching degree, transmitting the obtained result to the remote monitoring center, and analyzing the fault type while positioning the fault.
Preferably, in the matching comparison module, the data to be matched are numbered sequentially, the data to be matched are taken out sequentially, the data in the fault information module are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be directly determined, if the same historical fault data cannot be matched, the historical fault data which is matched with the data to be matched and has the highest similarity is taken as the fault type of the fault, and a fault solution is formulated.
Preferably, the remote monitoring center is further configured to receive fault type information, evaluate the emergency degree of the fault according to the received fault type information, and trigger an alarm platform; the alarm platform sends alarm reminding to emergency groups of different levels according to the emergency degree of the fault, and the fault emergency resources are utilized more scientifically and reasonably.
A power distribution network fault positioning method comprises the following steps:
s1: setting monitoring equipment, and monitoring current information and voltage information in the power distribution network;
s2: setting a current value and a voltage value threshold range, and judging whether the monitoring data is normal;
s3: if the current value exceeds the set threshold range, generating a high-voltage pulse signal, injecting the high-voltage pulse signal into the power distribution network, and simultaneously carrying out matching comparison on the current value and the voltage value;
s4: monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault, and processing the current containing the high-voltage pulse signal;
s5: processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults, and sending the position information to a remote monitoring center;
s6: and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.
Preferably, in step S1, the monitoring devices include a current monitoring meter and a voltage monitoring meter.
Preferably, in step S3, the current value and the voltage value are used as data to be matched, the data to be matched is matched and compared with stored historical fault data of the power distribution network, and a fault type is obtained according to the matching degree; the specific steps of matching and comparing comprise that data to be matched are numbered sequentially, data to be matched are taken out sequentially, historical fault data are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be determined directly, if the same historical fault data cannot be matched, the historical fault data which is matched with the data to be matched and has the highest similarity is used as the fault type of the fault, and a fault solution is formulated.
Preferably, in step S5, the location information is transmitted through a GPRS wireless communication network.
Preferably, in step S6, the remote monitoring center is connected to an alarm platform, and sends an alarm prompt to emergency groups of different levels according to the emergency degree of the fault; and the remote monitoring center receives the fault type information, evaluates the emergency degree of the fault according to the received fault type information and triggers the alarm platform.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a schematic block diagram of a power distribution network fault location system according to this embodiment.
Fig. 2 is a flowchart of a power distribution network fault location method according to this embodiment.
The system comprises a data monitoring module, a 2-monitoring data judging module, a 3-high-voltage pulse signal generating module, a 4-fault monitoring module, a 5-fault information module, a 6-matching comparison module, a 7-remote monitoring center, an 8-fault positioning module and a 9-alarm platform.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
As shown in fig. 1, a power distribution network fault location system includes: the data monitoring module 1 is provided with monitoring equipment, the monitoring equipment comprises a current monitoring meter for monitoring current information, and a voltage monitoring meter for monitoring voltage; the monitoring data judging module 2 is used for setting threshold ranges of current values and voltage values and judging whether the monitoring data are normal or not; the fault information module 5 is used for storing historical fault information of the power distribution network.
The high-voltage pulse signal generating module 3 is used for generating a high-voltage pulse signal and injecting the high-voltage pulse signal into the power distribution network if the current value exceeds a set threshold range, and meanwhile, the current value and the voltage value are transmitted into the matching comparison module 6; the fault monitoring module 4 is used for monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault and sending the current containing the high-voltage pulse signal to the fault positioning module 8;
the fault positioning module 8 is used for processing the current of the high-voltage pulse signal, determining the position information of the fault of the power distribution network, and sending the position information to the remote monitoring center 7 through the GPRS wireless communication network; the remote monitoring center 7 determines the fault occurrence position of the power distribution network according to the position information, is also used for receiving fault type information, evaluates the emergency degree of the fault according to the received fault type information and triggers an alarm platform 9; the alarm platform 9 sends alarm prompts to emergency groups of different levels according to the emergency degree of the fault, and the fault emergency resources are utilized more scientifically and reasonably.
The matching comparison module 6 is used for matching and comparing the current value and the voltage value serving as data to be matched with historical fault data of the power distribution network stored in the fault information module 5, obtaining a fault type according to the matching degree, transmitting the obtained result to the remote monitoring center 7, and analyzing the fault type while positioning the fault; and in the matching comparison module 6, the data to be matched are numbered sequentially, the data to be matched are taken out sequentially, the data in the fault information module 5 are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be directly determined, if the same historical fault data cannot be matched, the historical fault data with the highest similarity to the data to be matched is matched, and the historical fault data is used as the fault type of the fault, so that a fault solution is formulated.
As shown in fig. 2, a method for locating a fault of a power distribution network includes the following steps:
s1: setting monitoring equipment, and monitoring current information and voltage information in the power distribution network;
in the step S1, the monitoring devices include a current monitoring meter and a voltage monitoring meter.
S2: setting a current value and a voltage value threshold range, and judging whether the monitoring data is normal;
s3: if the current value exceeds the set threshold range, generating a high-voltage pulse signal, injecting the high-voltage pulse signal into the power distribution network, and simultaneously carrying out matching comparison on the current value and the voltage value;
in the step S3, the current value and the voltage value are used as data to be matched, the data to be matched is matched and compared with the stored historical fault data of the power distribution network, and the fault type is obtained according to the matching degree; the specific steps of matching and comparing comprise that data to be matched are numbered sequentially, data to be matched are taken out sequentially, historical fault data are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be determined directly, if the same historical fault data cannot be matched, the historical fault data which is matched with the data to be matched and has the highest similarity is used as the fault type of the fault, and a fault solution is formulated.
S4: monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault, and processing the current containing the high-voltage pulse signal;
s5: processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults, and sending the position information to a remote monitoring center;
in step S5, the location information is transmitted through the GPRS wireless communication network.
S6: and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.
In the step S6, the remote monitoring center is connected to an alarm platform, and sends an alarm prompt to emergency groups of different levels according to the emergency degree of the fault; and the remote monitoring center receives the fault type information, evaluates the emergency degree of the fault according to the received fault type information and triggers the alarm platform.
The above disclosure is only for the preferred embodiments of the invention, but the invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the invention shall fall within the protection scope of the invention.

Claims (10)

1. A power distribution network fault location system, comprising: the data monitoring module is provided with monitoring equipment and is used for monitoring current information and voltage information in the power distribution network;
the monitoring data judgment module is used for setting threshold ranges of current values and voltage values and judging whether the monitoring data are normal or not;
the high-voltage pulse signal generation module is used for generating a high-voltage pulse signal and injecting the high-voltage pulse signal into the power distribution network if the current value exceeds a set threshold range, and meanwhile, the current value and the voltage value are transmitted into the matching comparison module;
the fault monitoring module is used for monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault and sending the current containing the high-voltage pulse signal to the fault positioning module;
the fault positioning module is used for processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults and sending the position information to the remote monitoring center;
and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.
2. The power distribution network fault location system of claim 1, wherein: the monitoring equipment arranged in the data monitoring module comprises a current monitoring meter and a voltage monitoring meter.
3. The power distribution network fault location system of claim 1, wherein: and the fault positioning module transmits position information through a GPRS wireless communication network.
4. The power distribution network fault location system of claim 1, wherein: the power distribution network fault diagnosis system further comprises a fault information module, and the fault information module is used for storing historical fault information of the power distribution network.
5. The power distribution network fault location system of claim 4, wherein: and the matching comparison module is used for matching and comparing the data to be matched with the historical fault data of the power distribution network stored in the fault information module by taking the current value and the voltage value as the data to be matched, obtaining the fault type according to the matching degree, and transmitting the obtained result to the remote monitoring center.
6. The power distribution network fault location system of claim 5, wherein: and in the matching comparison module, the data to be matched are numbered sequentially, the data to be matched are taken out sequentially, the data in the fault information module are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be directly determined, and if the same historical fault data cannot be matched, the historical fault data which is matched with the data to be matched and has the highest similarity is taken as the fault type of the fault.
7. The power distribution network fault location system of claim 6, wherein: the remote monitoring center is also used for receiving fault type information, evaluating the emergency degree of the fault according to the received fault type information and triggering an alarm platform; and the alarm platform sends alarm prompts to emergency groups of different levels according to the emergency degree of the fault.
8. A power distribution network fault positioning method is characterized in that: the method comprises the following steps:
s1: setting monitoring equipment, and monitoring current information and voltage information in the power distribution network;
s2: setting a current value and a voltage value threshold range, and judging whether the monitoring data is normal;
s3: if the current value exceeds the set threshold range, generating a high-voltage pulse signal, injecting the high-voltage pulse signal into the power distribution network, and simultaneously carrying out matching comparison on the current value and the voltage value;
s4: monitoring whether the current in the power distribution network contains a high-voltage pulse signal so as to determine whether the power distribution network has a fault, and processing the current containing the high-voltage pulse signal;
s5: processing the current of the high-voltage pulse signal, determining the position information of the power distribution network with faults, and sending the position information to a remote monitoring center;
s6: and the remote monitoring center determines the fault occurrence position of the power distribution network according to the position information.
9. The power distribution network fault location method of claim 8, wherein: in the step S3, the current value and the voltage value are used as data to be matched, the data to be matched is matched and compared with the stored historical fault data of the power distribution network, and the fault type is obtained according to the matching degree; the specific steps of matching and comparing comprise that data to be matched are numbered sequentially, data to be matched are taken out sequentially, historical fault data are matched sequentially, when the data to be matched are matched with the same historical fault data, the fault type can be determined directly, and if the same historical fault data cannot be matched, the historical fault data which is matched with the data to be matched and has the highest similarity is used as the fault type of the fault.
10. The power distribution network fault location method of claim 9, wherein: in the step S6, the remote monitoring center is connected to an alarm platform, and sends an alarm prompt to emergency groups of different levels according to the emergency degree of the fault; and the remote monitoring center receives the fault type information, evaluates the emergency degree of the fault according to the received fault type information and triggers the alarm platform.
CN202110248420.1A 2021-03-08 2021-03-08 Power distribution network fault positioning system and method Pending CN112595933A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0226218A (en) * 1988-07-12 1990-01-29 Nishimu Denshi Kogyo Kk Detecting method for short-circuit trouble zone of transmission line
CN101846718A (en) * 2010-06-22 2010-09-29 山东电力研究院 Single-phase earth fault location system for distribution network of power system and method thereof
CN105467274A (en) * 2015-12-24 2016-04-06 国网浙江武义县供电公司 Device for fault detection and positioning of single-phase grounding of power distribution network
CN105548949A (en) * 2016-01-29 2016-05-04 张波 Method and system for fault remote determination of intelligent ammeter
CN110175204A (en) * 2019-05-17 2019-08-27 国网河北省电力有限公司沧州供电分公司 Intelligent substation data management and decision system, method and terminal device
CN111458590A (en) * 2020-04-21 2020-07-28 国网北京市电力公司 Fault detection system of power distribution network
CN111537819A (en) * 2020-05-13 2020-08-14 国网山东省电力公司泰安供电公司 Distribution automation monitoring method, system, terminal and storage medium

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0226218A (en) * 1988-07-12 1990-01-29 Nishimu Denshi Kogyo Kk Detecting method for short-circuit trouble zone of transmission line
CN101846718A (en) * 2010-06-22 2010-09-29 山东电力研究院 Single-phase earth fault location system for distribution network of power system and method thereof
CN105467274A (en) * 2015-12-24 2016-04-06 国网浙江武义县供电公司 Device for fault detection and positioning of single-phase grounding of power distribution network
CN105548949A (en) * 2016-01-29 2016-05-04 张波 Method and system for fault remote determination of intelligent ammeter
CN110175204A (en) * 2019-05-17 2019-08-27 国网河北省电力有限公司沧州供电分公司 Intelligent substation data management and decision system, method and terminal device
CN111458590A (en) * 2020-04-21 2020-07-28 国网北京市电力公司 Fault detection system of power distribution network
CN111537819A (en) * 2020-05-13 2020-08-14 国网山东省电力公司泰安供电公司 Distribution automation monitoring method, system, terminal and storage medium

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