CN113985206A - Single-phase earth fault on-site diagnosis device for power distribution network - Google Patents
Single-phase earth fault on-site diagnosis device for power distribution network Download PDFInfo
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- CN113985206A CN113985206A CN202111263521.2A CN202111263521A CN113985206A CN 113985206 A CN113985206 A CN 113985206A CN 202111263521 A CN202111263521 A CN 202111263521A CN 113985206 A CN113985206 A CN 113985206A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Abstract
The invention relates to the field of single-phase earth faults, in particular to a single-phase earth fault on-site diagnosis device for a power distribution network, which comprises a three-phase acquisition unit and an on-site diagnosis base station; the three-phase acquisition unit is positioned on the three-phase line and used for acquiring data of the three-phase line; the in-situ diagnosis base station is arranged on a tower of a monitoring point and used for receiving and diagnosing data sent by the three-phase acquisition unit so as to judge whether a single-phase earth fault occurs or not, and the in-situ diagnosis base station performs data interaction with the three-phase acquisition unit through Bluetooth wireless communication; the three-phase acquisition unit comprises an energy acquisition and charging module, a data acquisition module, a high-frequency wave recording module and a first wireless short-distance transmission module; the in-situ diagnostic base station comprises a second wireless short-range transmission module and a core processor. According to the invention, the single-phase earth fault can be rapidly and accurately judged through the three-phase acquisition unit and the in-situ diagnosis base, and the serious consequences caused by long-time faults are avoided.
Description
Technical Field
The invention relates to the field of single-phase earth faults, in particular to a single-phase earth fault on-site diagnosis device for a power distribution network.
Background
The single-phase earth fault is the most common fault type in a plurality of power distribution network faults, the proportion of the single-phase earth fault accounts for 80% of the total number of the power distribution network faults, along with the rapid development of the power distribution network, the system capacity is gradually increased, the number of branches is continuously increased, the proportion of cable lines in the power distribution network is continuously increased, the single-phase earth fault capacitance current is increased, and the long-time fault operation easily causes very serious consequences, such as fault expansion into two-phase or multi-phase earth short circuit, arc light earth can also cause system overvoltage, the insulation of equipment is endangered, the equipment is possibly damaged, the safe operation of the system is damaged, and therefore the fault line must be found and cut off in time.
The existing single-phase earth fault diagnosis device mainly adopts a method for capturing line steady-state current for judgment, the time for the fault of the distribution line, particularly the earth fault, is extremely short, and the judgment is difficult to be accurate through the change of the steady-state current.
Disclosure of Invention
The invention provides a single-phase earth fault on-site diagnosis device for a power distribution network, which can quickly and accurately judge a single-phase earth fault and avoid serious consequences caused by long-time faults.
In order to achieve the purpose, the invention provides the following technical scheme:
the single-phase earth fault on-site diagnosis device for the power distribution network is characterized by comprising a three-phase acquisition unit and an on-site diagnosis base station;
the three-phase acquisition unit is positioned on the three-phase line and used for acquiring data of the three-phase line;
the in-situ diagnosis base station is arranged on a tower of a monitoring point and used for receiving and diagnosing data sent by the three-phase acquisition unit so as to judge whether a single-phase earth fault occurs or not, and the in-situ diagnosis base station performs data interaction with the three-phase acquisition unit through Bluetooth wireless communication;
the three-phase acquisition unit comprises a data acquisition module, a high-frequency wave recording module and a first wireless short-distance transmission module, wherein the data acquisition module is used for collecting electrical data of a three-phase line, the high-frequency wave recording module is used for acquiring current data from the data acquisition module and converting the current data into high-frequency waveform data, the first wireless short-distance transmission module is used for receiving the high-frequency waveform data and transmitting the high-frequency waveform data to the in-situ diagnosis base, and the Bluetooth wireless communication is used for receiving the high-frequency waveform data transmitted by the first wireless short-distance transmission module and transmitting the high-frequency waveform data to the in-situ diagnosis base;
the in-place diagnosis base station comprises a second wireless short-distance transmission module and a core processor, wherein the second wireless short-distance transmission module receives the high-frequency waveform data transmitted by the Bluetooth wireless communication and transmits the high-frequency waveform data to the core processor, and the core processor processes the high-frequency waveform data transmitted by the second wireless short-distance transmission module to judge whether a single-phase earth fault exists.
Preferably, the in-situ diagnosis base station transmits fault data to the system main station through GPRS remote wireless data transmission so as to record fault events.
Preferably, the three-phase acquisition unit further comprises a charging module for power acquisition, and the charging module for power acquisition is used for supplying power to the data acquisition module, the high-frequency wave recording module and the wireless short-distance transmission module.
Preferably, the in-situ diagnosis base station further comprises a photovoltaic power generation module and a lithium battery module, wherein the photovoltaic power generation module is electrically connected with the lithium battery module, the photovoltaic power generation module is used for generating power by using solar energy and charging the lithium battery module, and the lithium battery module is electrically connected with the core processor.
Preferably, the in-situ diagnosis base station further includes an information storage module, the information storage module is electrically connected to the core processor, and the information storage module is configured to store data information processed by the core processor.
Preferably, the in-situ diagnosis base station further comprises an alarm unit, the alarm unit is electrically connected with the core processor, and when the core processor judges that the single-phase earth fault exists according to the high-frequency waveform data, the core processor controls the alarm unit to be started so as to warn monitoring personnel.
Preferably, the alarm unit is an indicator light which gives out a flashing fault alarm prompt.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the single-phase earth fault can be rapidly and accurately judged through the three-phase acquisition unit and the in-situ diagnosis base, so that the serious consequences caused by long-time faults are avoided; firstly, suspending a three-phase acquisition unit on a three-phase line, carrying out high-frequency wave recording on the ABC three-phase line, and acquiring the current and the ground electric field of the three-phase line; and then, the local diagnosis base station arranged on the tower of the monitoring point performs data interaction with the three-phase acquisition unit through Bluetooth wireless communication. The three-phase acquisition unit sends the recorded wave data of gathering to the diagnosis in place base station, and the diagnosis in place base station judges single-phase earth fault according to "three-phase recorded wave waveform", and when the increase of earth phase current appeared, the electric field diminishes, and during the characteristic of the grow of two-phase electric field in addition, can judge single-phase earth fault to realize the diagnostic function in place fast accurately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a single-phase earth fault in-situ diagnosis device for a power distribution network according to an embodiment of the present invention.
And (3) iconic marking: the system comprises a 1-three-phase acquisition unit, a 2-in-place diagnosis base station, a 3-Bluetooth wireless communication, a 4-data acquisition module, a 5-high-frequency wave recording module, a 6-first wireless short-distance transmission module, a 7-second wireless short-distance transmission module, an 8-core processor, a 9-power acquisition and energy charging module, a 10-photovoltaic power generation module, a 11-lithium battery module, a 12-information storage module and a 13-alarm unit.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1, the in-situ diagnosis device for the single-phase earth fault of the power distribution network is characterized by comprising a three-phase acquisition unit 1 and an in-situ diagnosis base station 2;
the three-phase acquisition unit 1 is positioned on a three-phase line and used for acquiring data of the three-phase line;
the in-situ diagnosis base station 2 is arranged on a tower of a monitoring point and used for receiving and diagnosing data sent by the three-phase acquisition unit so as to judge whether a single-phase earth fault occurs or not, and the in-situ diagnosis base station 2 carries out data interaction with the three-phase acquisition unit 1 through Bluetooth wireless communication 3;
the three-phase acquisition unit 1 comprises a data acquisition module 4, a high-frequency wave recording module 5 and a first wireless short-distance transmission module 6, wherein the data acquisition module 4 is used for collecting electrical data of a three-phase line, the high-frequency wave recording module 5 is used for acquiring the electrical data from the data acquisition module 4 and converting the electrical data into high-frequency waveform data, the first wireless short-distance transmission module 6 is used for transmitting the high-frequency waveform data to the diagnosis-in-place base, and the Bluetooth wireless communication 3 is used for receiving the high-frequency waveform data transmitted by the first wireless short-distance transmission module 6 and transmitting the high-frequency waveform data to the diagnosis-in-place base 2;
the in-place diagnosis base station 2 comprises a second wireless short distance transmission module 7 and a core processor 8, wherein the second wireless short distance transmission module 7 receives the high frequency waveform data transmitted by the Bluetooth wireless communication 3 and transmits the high frequency waveform data to the core processor 8, and the core processor 8 processes the high frequency waveform data to judge whether a single-phase earth fault exists.
Specifically, the method can realize rapid and accurate judgment of the single-phase earth fault through the three-phase acquisition unit 1 and the local diagnosis base, and avoid serious consequences caused by long-time faults; firstly, suspending a three-phase acquisition unit 1 on a three-phase line, carrying out high-frequency wave recording on the ABC three-phase line, and acquiring the current and the ground electric field of the three-phase line; then, the local diagnosis base station 2 installed on the tower of the monitoring point performs data interaction with the three-phase acquisition unit 1 through Bluetooth wireless communication 3. The three-phase acquisition unit 1 sends the recorded wave data of gathering to the diagnosis in place base station 2, and the diagnosis in place base station 2 judges single-phase earth fault according to "three-phase recorded wave waveform", and when the ground phase current increase appears, the electric field diminishes, during the characteristic of two-phase electric field grow in addition, can judge single-phase earth fault to realize the quick diagnostic function in place accurately.
Further, the in-situ diagnosis base station 2 transmits fault data to the system main station through GPRS remote wireless data transmission so as to record fault events.
Preferably, the three-phase acquisition unit 1 further comprises a charging module 9, and the charging module 9 is used for supplying power to the data acquisition module 4, the high-frequency wave recording module 5 and the wireless short-distance transmission module.
It should be noted that the in-situ diagnosis base station 2 further includes a photovoltaic power generation module 10 and a lithium battery module 11, the photovoltaic power generation module 10 is electrically connected to the lithium battery module 11, the photovoltaic power generation module 10 is configured to generate power by using solar energy and charge the lithium battery module 11, and the lithium battery module 11 is electrically connected to the core processor 8.
It should be noted that the in-situ diagnostic base station 2 further includes an information storage module 12, the information storage module 12 is electrically connected to the core processor 8, and the information storage module 12 is configured to store the data information processed by the core processor 8.
Further, the in-situ diagnosis base station 2 further comprises an alarm unit 13, the alarm unit 13 is electrically connected with the core processor 8, and when the core processor 8 judges that a single-phase earth fault exists through the high-frequency waveform data, the core processor 8 controls the alarm unit 13 to be started so as to warn monitoring personnel.
Preferably, the alarm unit 13 is an indicator light for giving a flashing fault alarm prompt.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The single-phase earth fault on-site diagnosis device for the power distribution network is characterized by comprising a three-phase acquisition unit and an on-site diagnosis base station;
the three-phase acquisition unit is positioned on the three-phase line and used for acquiring data of the three-phase line;
the in-situ diagnosis base station is arranged on a tower of a monitoring point and used for receiving and diagnosing data sent by the three-phase acquisition unit so as to judge whether a single-phase earth fault occurs or not, and the in-situ diagnosis base station performs data interaction with the three-phase acquisition unit through Bluetooth wireless communication;
the three-phase acquisition unit comprises a data acquisition module, a high-frequency wave recording module and a first wireless short-distance transmission module, wherein the data acquisition module is used for collecting electrical data of a three-phase line, the high-frequency wave recording module is used for acquiring the electrical data from the data acquisition module and converting the electrical data into high-frequency waveform data, the first wireless short-distance transmission module is used for receiving the high-frequency waveform data and transmitting the high-frequency waveform data to the on-site diagnosis base, and the Bluetooth wireless communication is used for receiving the high-frequency waveform data transmitted by the first wireless short-distance transmission module and transmitting the high-frequency waveform data to the on-site diagnosis base;
the in-place diagnosis base station comprises a second wireless short-distance transmission module and a core processor, wherein the second wireless short-distance transmission module receives the high-frequency waveform data transmitted by the Bluetooth wireless communication and transmits the high-frequency waveform data to the core processor, and the core processor processes the high-frequency waveform data transmitted by the second wireless short-distance transmission module to judge whether a single-phase earth fault exists.
2. The device for local diagnosis of the single-phase earth fault of the power distribution network of claim 1, wherein the local diagnosis base station transmits the fault data to the system main station through GPRS remote wireless data transmission so as to record the fault event.
3. The on-site diagnosis device for the single-phase earth fault of the power distribution network of claim 1, wherein the three-phase acquisition unit further comprises a charging module for power supply to the data acquisition module, the high-frequency wave recording module and the wireless short-distance transmission module.
4. The on-site diagnosis device for the single-phase earth fault of the power distribution network of claim 1, wherein the on-site diagnosis base station further comprises a photovoltaic power generation module and a lithium battery module, the photovoltaic power generation module is electrically connected with the lithium battery module, the photovoltaic power generation module is used for generating power by using solar energy and charging the lithium battery module, and the lithium battery module is electrically connected with the core processor.
5. The device of claim 1, wherein the in-situ diagnostic base station further comprises an information storage module, the information storage module is electrically connected to the core processor, and the information storage module is configured to store the data information processed by the core processor.
6. The device of claim 1, wherein the in-situ diagnostic base station further comprises an alarm unit, the alarm unit is electrically connected to the core processor, and when the core processor determines that the single-phase ground fault exists according to the high-frequency waveform data, the core processor controls the alarm unit to be activated to warn a monitoring person.
7. The in-situ diagnosis device for the single-phase earth fault of the power distribution network as claimed in claim 6, wherein the alarm unit is an indicator lamp which gives out a flashing fault alarm prompt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111263521.2A CN113985206A (en) | 2021-10-28 | 2021-10-28 | Single-phase earth fault on-site diagnosis device for power distribution network |
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| CN202111263521.2A CN113985206A (en) | 2021-10-28 | 2021-10-28 | Single-phase earth fault on-site diagnosis device for power distribution network |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN106569089A (en) * | 2016-10-11 | 2017-04-19 | 国网上海市电力公司 | Power distribution line dynamic Information-based power distribution network fault monitoring method |
| CN108132417A (en) * | 2017-11-24 | 2018-06-08 | 国网北京市电力公司 | Method for locating single-phase ground fault and device |
-
2021
- 2021-10-28 CN CN202111263521.2A patent/CN113985206A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569089A (en) * | 2016-10-11 | 2017-04-19 | 国网上海市电力公司 | Power distribution line dynamic Information-based power distribution network fault monitoring method |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN108132417A (en) * | 2017-11-24 | 2018-06-08 | 国网北京市电力公司 | Method for locating single-phase ground fault and device |
Non-Patent Citations (1)
| Title |
|---|
| 张胜利: "港口配电网单相接地故障定位系统设计", 《中国水运》 * |
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