CN209784476U - Zero sequence fault indicator - Google Patents
Zero sequence fault indicator Download PDFInfo
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- CN209784476U CN209784476U CN201920292444.5U CN201920292444U CN209784476U CN 209784476 U CN209784476 U CN 209784476U CN 201920292444 U CN201920292444 U CN 201920292444U CN 209784476 U CN209784476 U CN 209784476U
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Abstract
The application provides a zero sequence fault indicator, which comprises a power taking device, a current processing circuit and a device power supply. The electricity taking device is electrically connected with any one phase of electric wires in the three-phase electric wires. The input end of the current processing circuit is electrically connected with the power taking device. The current processing circuit is configured to convert the current obtained by the power taking device 100. The device power supply is electrically connected with the output end of the current processing circuit. The device power supply is used for providing direct current power supply for the zero sequence fault indicator. This application passes through get the cooperation of electric installation and three-phase electric wire, pass through the electric energy on the arbitrary looks electric wire of three-phase electric wire the current processing circuit transmits for the device power, thereby do device mains operated, and then can make zero sequence fault indicator's power supply mode is pluralism more, and the adaptability is stronger.
Description
Technical Field
the application relates to the technical field of power distribution equipment, in particular to a zero sequence fault indicator.
Background
In an electrical distribution network, a cable earth fault is mostly judged by a zero sequence fault indicator. When the three-phase fault detection device is used, an induced Current Transformer (CT) on the zero sequence fault indicator is sleeved on a three-phase composite line, and the detection of the fault of a cable circuit is realized. The zero sequence fault indicator is different from an overhead fault indicator, because the synthetic voltage on the three-phase synthetic line is zero, the induction CT on the zero sequence fault indicator cannot directly get electricity from the three-phase synthetic line, and further, the problem of difficulty in getting electricity on line exists. The existing zero sequence fault indicator is powered by a large-capacity dry battery.
The power supply of the dry battery has the conditions of limited electric quantity, short power consumption time, certain service life and shortened service life along with the change of temperature in the operation process; therefore, the problem that the whole device of the zero sequence fault indicator is scrapped due to single power supply mode is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a zero sequence fault indicator for solving the problems of the existing zero sequence fault indicator that the on-line power taking is difficult and the power supply mode is single.
A zero sequence fault indicator comprising:
The electricity taking device is electrically connected with any one phase of electric wires in the three-phase electric wires;
The input end of the current processing circuit is electrically connected with the electricity taking device and is used for converting the current obtained by the electricity taking device;
and the device power supply is electrically connected with the output end of the current processing circuit and is used for providing direct current power supply for the zero sequence fault indicator.
In one embodiment, the power taking device includes:
And the voltage transformer or the current transformer is electrically connected with any one phase of electric wire in the three-phase electric wires, and is also electrically connected with the input end of the current processing circuit.
In one embodiment, the zero sequence fault indicator further includes:
The body, the current processing circuit, the device power all sets up in the body.
In one embodiment, the zero sequence fault indicator further includes:
and the rechargeable battery is arranged in the body and electrically connected with the current processing circuit, and the current converted by the current processing circuit is directly stored in the device power supply or is charged by the rechargeable battery.
In one embodiment, the zero sequence fault indicator further includes:
one end of the waterproof joint is electrically connected with the device power supply, and the other end of the waterproof joint is used for being electrically connected with the power taking device; or the other end of the waterproof joint is used for being electrically connected with an external power supply so as to charge the rechargeable battery through the external power supply.
In one embodiment, the zero sequence fault indicator comprises:
And the electric quantity detector is arranged in the body and is respectively electrically connected with the current processing circuit, the device power supply and the rechargeable battery.
In one embodiment, the zero sequence fault indicator further includes:
and the master controller is arranged in the body and is electrically connected between the electric quantity detector and the current processing circuit.
in one embodiment, the current processing circuit further comprises:
The rectifying circuit is arranged in the body, and the input end of the rectifying circuit is electrically connected with the power taking device;
The conversion circuit is arranged in the body, the input end of the conversion circuit is electrically connected with the output end of the rectification circuit, and the output end of the conversion circuit is electrically connected with the device power supply.
In one embodiment, the rectifier circuit comprises:
The bridge rectifier is electrically connected between the input end of the conversion circuit and the power taking device.
in one embodiment, the conversion circuit includes:
and the input end of the DC/DC converter is electrically connected with the output end of the rectifying circuit, and the output end of the DC/DC converter is electrically connected with the device power supply.
Compared with the prior art, the zero sequence fault indicator obtains electric energy from any one phase of electric wire of a three-phase electric wire through the electricity taking device, the electric energy is transmitted to the device power supply after being converted by the current processing circuit, and therefore the zero sequence fault indicator is powered, the power supply mode of the zero sequence fault indicator is diversified, and the adaptability is strong.
drawings
fig. 1 is a schematic structural diagram of a zero-sequence fault indicator according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a zero-sequence fault indicator provided in an embodiment of the present application for power taking or charging;
fig. 3 is a block diagram of a zero-sequence fault indicator according to an embodiment of the present application;
fig. 4 is a block diagram of a fault control device according to an embodiment of the present application;
Fig. 5 is a block diagram of a fault control system according to an embodiment of the present application.
10 zero sequence fault indicator
100 power taking device
101 electric wire
102 body
110 voltage transformer or current transformer
20 failure control device
21 control device
22 radio communication device
200 current processing circuit
210 rectifier circuit
211 bridge rectifier
220 conversion circuit
221 DC/DC converter
30 fault control system
31 host device
300 device power supply
400 external power supply
500 waterproof joint
600 rechargeable battery
800 electric quantity detector
900 master controller
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. 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.
unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present application provides a zero-sequence fault indicator 10, which includes a power-taking device 100, a current processing circuit 200, and a device power source 300. The electricity taking device 100 is electrically connected with any one phase electric wire 101 in the three-phase electric wires. The input end of the current processing circuit 200 is electrically connected to the power-taking device 100. The current processing circuit 200 is configured to convert the current obtained by the power taking device 100. The device power supply 300 is electrically connected to an output of the current processing circuit 200. The device power supply 300 is used to provide dc power to the zero sequence fault indicator 10.
it is understood that the specific structure of the electricity-taking device 100 is not particularly limited as long as electricity is taken from the electric wire 101 of any one phase of the three-phase electric wires. The specific structure of the power taking device 100 can be selected according to actual requirements. In one embodiment, the power-taking device 100 may be a first voltage transformer. In one embodiment, the power taking device 100 may also be a first current transformer. In one embodiment, the power-taking device 100 may also be a voltage-current combination transformer. In one embodiment, the power-taking device 100 may be sleeved on the electric wire 101 of any one phase of the three-phase electric wires.
it is understood that the specific structure of the current processing circuit 200 is not limited specifically, as long as the current processing circuit converts the current transmitted by the power-taking device 100 into the current capable of charging the device power source 300. The specific circuit structure of the current processing circuit 200 can be selected according to actual requirements. In one embodiment, the current processing circuit 200 may be an ac/dc converter.
It is understood that the specific structure of the device power supply 300 is not limited specifically, as long as it has the function of providing dc power for the zero sequence fault indicator 10. The specific structure of the device power supply 300 can be selected according to actual requirements. In one embodiment, the device power supply 300 may be a lead-acid battery with charge and discharge functions. In one embodiment, the device power source 300 may also be a UPS battery with a charge and discharge function.
It is understood that the manner of electrically connecting the device power supply 300 and the output terminal of the current processing circuit 200 is not limited, as long as the device power supply 300 and the current processing circuit 200 are electrically connected. In one embodiment, the device power supply 300 may be electrically connected to the output of the current processing circuit 200 via a first wire. Specifically, the material of the first conductive wire can be selected according to the requirement. In one embodiment, the first conductive line may be a copper conductive line. In one embodiment, the first wire may also be an aluminum wire. In one embodiment, the device power supply 300 may also be directly electrically connected to the output of the current handling circuit 200.
In this embodiment, through get electric installation 100 with the three-phase electric wire cooperation, will any one looks of three-phase electric wire electric energy on the electric wire 101 passes through current processing circuit 200 transmits to device power 300, thereby for device power 300 supplies power, and then can make zero sequence fault indicator 10's power supply mode is more diversified, and the adaptability is stronger.
Referring to fig. 2, in an embodiment, the power-taking device 100 includes a voltage transformer or a current transformer 110. The voltage transformer or the current transformer 110 is electrically connected to any one of the three-phase electric wires 101. The voltage transformer or current transformer 110 is also electrically connected to an input of the current processing circuit 200. The voltage transformer or the current transformer 110 converts a large current on the wire 101 of any phase of the three-phase wire into a small current through an electromagnetic induction principle, so that the small current is transmitted to the device power supply 300 through the current processing circuit 200, and then the device power supply 300 is supplied with power.
In one embodiment, the zero sequence fault indicator 10 further comprises an ontology 102. The current processing circuit 200 and the device power supply 300 are both disposed in the body 102. It is to be understood that the shape of the body 102 is not limited as long as the current processing circuit 200 and the device power supply 300 can be disposed in the body 102. It is noted that the body may include the conventional functions of the existing zero sequence fault indicator in addition to the carrier of the functional device, and in one embodiment, the shape of the body 102 may be a rectangular parallelepiped or a cylinder.
In one embodiment, the zero sequence fault indicator 10 further comprises a rechargeable battery 600. The rechargeable battery 600 is disposed in the body 102. The rechargeable battery 600 is electrically connected to the current processing circuit 200. The current converted by the current processing circuit 200 is directly stored in the device power supply 300 or charges the rechargeable battery 600. It is to be understood that the type of the rechargeable battery 600 is not limited as long as it has a charging function. In one embodiment, the rechargeable battery 600 may be a lead-acid battery. In one embodiment, the rechargeable battery 600 may also be a UPS battery with a charging and discharging function.
in one embodiment, the zero sequence fault indicator 10 further comprises a watertight joint 500. One end of the waterproof connector 500 is electrically connected with the device power supply 300, and the other end of the waterproof connector 500 is used for electrically connecting with the power taking device 100; or the other end of the watertight connector 500 is used to be electrically connected to an external power source 400, so that the rechargeable battery 600 is charged by the external power source 400. Further, under the extreme condition that the three-phase electric wire and the rechargeable battery 600 are not charged, the zero sequence fault indicator 10 can still be charged, so that the power supply mode of the zero sequence fault indicator 10 is more diversified, and the adaptability is stronger.
In one embodiment, the external power source 400 may be 220V commercial power, or may be a solar panel. In one embodiment, the waterproof connector 500 can be selectively connected to only one of the power-taking device 100 and the external power source 400 at a time. That is, the waterproof connector 500 is electrically connected to the power taking device 100, or the waterproof connector 500 is electrically connected to the external power source 400.
referring to fig. 3, in an embodiment, the zero sequence fault indicator 10 further includes an electric quantity detector 800 and a master controller 900. The charge detector 800 is disposed in the body 102. The charge level detector 800 is electrically connected to the current processing circuit 200, the device power supply 300, and the rechargeable battery 600, respectively. The master controller 900 is disposed in the body 102. The main controller 900 is electrically connected between the power detector 800 and the current processing circuit 200.
in one embodiment, the charge detector 800 is used to monitor the charge of the device power source 300 and the rechargeable battery 600. In an embodiment, when the zero sequence fault indicator 10 uses the electricity obtained by the electricity obtaining device 100, if the electricity detector 800 monitors that the electricity of the rechargeable battery 600 is not full or no electricity, a signal is sent to the master controller 900, and the master controller 900 controls the electricity obtaining device 100 to also charge the rechargeable battery 600.
In one embodiment, the current processing circuit 200 includes: a rectifier circuit 210 and a converter circuit 220. The rectifying circuit 210 is disposed in the body 102. The input end of the rectifying circuit 210 is electrically connected to the power taking device 100. The conversion circuit 220 is disposed in the body 102. An input terminal of the conversion circuit 220 is electrically connected to an output terminal of the rectification circuit 210. The output of the switching circuit 220 is electrically connected to the device power supply 300.
in one embodiment, the rectifying circuit 210 may be formed by a bridge rectifier 211, a resistor, and a capacitor. In one embodiment, the bridge rectifier 211 is electrically connected between the input terminal of the converting circuit 220 and the power-taking device 100. In one embodiment, the rectifying circuit 210 may also be a conventional circuit having the function of converting ac power to dc power.
in one embodiment, the conversion circuit 220 includes a DC/DC converter 221. The input end of the DC/DC converter 221 is electrically connected to the power-taking device 100. The output of the DC/DC converter 221 is electrically connected to the device power supply 300. The current rectified by the rectifying circuit 210 is converted into a current that can charge the device power supply 300 by the DC/DC converter 221.
When the zero sequence fault indicator is used, firstly, the zero sequence fault indicator 10 is installed on a three-phase electric wire according to design requirements, and the power taking device 100 is electrically connected with the electric wire 101 of one of the three-phase electric wire according to the voltage level of a specific phase line. The electricity taking device 100 can be a transformer which converts 10kv into 3.6v or converts 35kv into 3.6v, and can be selected manually according to needs. When the power taking device 100 can take electricity, the working power supply of the zero sequence fault indicator 10 preferentially uses the electricity taken by the power taking device 100. Meanwhile, the electric quantity detector 800 detects whether the rechargeable battery 600 is charged, and if the rechargeable battery 600 is not charged, the main controller 900 controls the electricity taking device 100 to charge the rechargeable battery 600 at the same time. If the electricity taking device 100 cannot take electricity, the rechargeable battery 600 supplies power to the zero sequence fault indicator 10. In an extreme case where neither the three-phase wires nor the rechargeable battery 600 are charged, the external power source 400 may be used to charge the zero sequence fault indicator device 10. The external power supply 400 is connected with the external 220V commercial power.
To sum up, this application passes through get electric installation 100 with the cooperation of three-phase electric wire will any one looks of three-phase electric wire electric energy on the electric wire 101 passes through current processing circuit 200 transmits for device power 300, thereby does device power 300 supplies power, and then can make zero sequence fault indicator 10's power supply mode is pluralism more, and the adaptability is stronger.
Referring to fig. 4, an embodiment of the present application provides a fault control device 20 including a zero-sequence fault indicator 10 according to any one of the embodiments described above. In one embodiment, the fault control device 20 further comprises a control means 21. The control device 21 is in communication connection with the zero sequence fault indicator 10. The control device 21 is used to control the opening and closing of the zero sequence fault indicator 10. In one embodiment, the control device 21 may be a conventional controller. In one embodiment, the control device 21 may also be a Micro Control Unit (MCU).
In one embodiment, the fault control device 20 further includes a wireless communication device 22. The control device 21 is communicatively connected to the zero sequence fault indicator 10 via a wireless communication device 22. In one embodiment, the communication mode of the wireless communication device 22 may be bluetooth or WIFI or radio frequency signal.
The fault control device 20 is matched with the three-phase electric wire through the electricity taking device 100, and electric energy on the electric wire 101 of any phase of the three-phase electric wire is transmitted to the device power supply 300 through the current processing circuit 200, so that the device power supply 300 supplies power, the power supply mode of the zero sequence fault indicator 10 in the fault control device 20 is diversified, and the fault control device 20 is strong in adaptability.
Referring to fig. 5, an embodiment of the present application provides a fault control system 30, which includes the zero-sequence fault indicator 10 and the host device 31 according to any one of the embodiments. The host device 31 is in communication with the zero sequence fault indicator 10. In one embodiment, the host device 31 may be a computer, a cell phone, a tablet, or the like.
The fault control system 30 is through get electric installation 100 with the cooperation of three-phase electric wire will any one looks of three-phase electric wire electric energy on the electric wire 101 passes through current processing circuit 200 transmits for device power 300, thereby for device power 300 supplies power, and then can make zero sequence fault indicator 10's among the fault control system 30 power supply mode is more diversified, makes fault control system 30 adaptability is stronger.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A zero sequence fault indicator, comprising:
The power taking device (100) is electrically connected with any one phase electric wire (101) in the three-phase electric wires;
The current processing circuit (200), the input end of the current processing circuit (200) is electrically connected with the electricity-taking device (100) and is used for converting the current obtained by the electricity-taking device (100);
And the device power supply (300) is electrically connected with the output end of the current processing circuit (200) and is used for providing direct current power supply for the zero sequence fault indicator (10).
2. the zero sequence fault indicator of claim 1, wherein the power take-off device (100) comprises:
and the voltage transformer or the current transformer (110) is electrically connected with any one phase wire (101) in the three-phase wires, and the voltage transformer or the current transformer (110) is also electrically connected with the input end of the current processing circuit (200).
3. The zero sequence fault indicator of claim 1, further comprising:
A body (102), the current processing circuit (200) and the device power supply (300) are both disposed in the body (102).
4. The zero sequence fault indicator of claim 3, further comprising:
And the rechargeable battery (600) is arranged in the body (102) and is electrically connected with the current processing circuit (200), and the current converted by the current processing circuit (200) is directly stored in the device power supply (300) or is used for charging the rechargeable battery (600).
5. The zero sequence fault indicator of claim 4, further comprising:
One end of the waterproof connector (500) is electrically connected with the device power supply (300), and the other end of the waterproof connector (500) is used for being electrically connected with the power taking device (100); or the other end of the waterproof connector (500) is used for being electrically connected with an external power supply (400) so as to charge the rechargeable battery (600) through the external power supply (400).
6. The zero sequence fault indicator of claim 3, further comprising:
And the electric quantity detector (800) is arranged in the body (102) and is respectively and electrically connected with the current processing circuit (200), the device power supply (300) and the rechargeable battery (600).
7. The zero sequence fault indicator of claim 6, further comprising:
And the master controller (900) is arranged in the body (102) and is electrically connected between the electric quantity detector (800) and the current processing circuit (200).
8. The zero sequence fault indicator of claim 3, characterized in that the current processing circuit (200) comprises:
The rectifying circuit (210) is arranged in the body (102), and the input end of the rectifying circuit (210) is electrically connected with the power taking device (100);
the conversion circuit (220) is arranged in the body (102), the input end of the conversion circuit (220) is electrically connected with the output end of the rectification circuit (210), and the output end of the conversion circuit (220) is electrically connected with the device power supply (300).
9. The zero sequence fault indicator of claim 8, wherein the rectifying circuit (210) comprises:
The bridge rectifier (211) is electrically connected between the input end of the conversion circuit (220) and the power taking device (100).
10. The zero sequence fault indicator of claim 8, wherein the conversion circuit (220) comprises:
A DC/DC converter (221), an input terminal of the DC/DC converter (221) being electrically connected to an output terminal of the rectifying circuit (210), an output terminal of the DC/DC converter (221) being electrically connected to the device power supply (300).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920292444.5U CN209784476U (en) | 2019-03-08 | 2019-03-08 | Zero sequence fault indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920292444.5U CN209784476U (en) | 2019-03-08 | 2019-03-08 | Zero sequence fault indicator |
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| Publication Number | Publication Date |
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| CN209784476U true CN209784476U (en) | 2019-12-13 |
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| CN201920292444.5U Active CN209784476U (en) | 2019-03-08 | 2019-03-08 | Zero sequence fault indicator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505457A (en) * | 2020-05-07 | 2020-08-07 | 国家电网有限公司 | GIS partial discharge comprehensive online monitoring device |
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2019
- 2019-03-08 CN CN201920292444.5U patent/CN209784476U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505457A (en) * | 2020-05-07 | 2020-08-07 | 国家电网有限公司 | GIS partial discharge comprehensive online monitoring device |
| CN111505457B (en) * | 2020-05-07 | 2022-05-31 | 国家电网有限公司 | GIS partial discharge comprehensive online monitoring device |
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