CN111327034B - Arc extinction and overvoltage protection device - Google Patents
Arc extinction and overvoltage protection device Download PDFInfo
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- CN111327034B CN111327034B CN201811539921.XA CN201811539921A CN111327034B CN 111327034 B CN111327034 B CN 111327034B CN 201811539921 A CN201811539921 A CN 201811539921A CN 111327034 B CN111327034 B CN 111327034B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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Abstract
The invention discloses an arc extinction and overvoltage protection device which comprises a connecting circuit and a detection circuit, wherein a voltage transformer and a high-voltage current-limiting capacitor which are connected with the connecting circuit in series and an arc extinction and discharge protection device which is connected with the connecting circuit in parallel are arranged on the connecting circuit, a signal receiver and a 2X capacitor are arranged in the arc extinction and discharge protection device, a plurality of voltage dividing resistors are connected with the 2X capacitor in series, and a series switch is arranged on the connecting circuit corresponding to each voltage dividing resistor. The invention utilizes a plurality of detection boxes on the detection circuit to detect the connection circuit, the detection circuit is not directly connected with the connection circuit, only the structure on the wireless communication connection circuit is used, and the detection circuit is directly supplied with power by the solar power generation system, so that the detection circuit can not be influenced no matter any overvoltage and resonance phenomenon occur on the connection circuit, the detection is stable and fast, and the fast maintenance of the connection circuit is ensured.
Description
Technical Field
The invention relates to the technical field of arc extinction and overvoltage protection, in particular to an arc extinction and overvoltage protection device.
Background
At present, most of distribution systems below 35kV in China adopt a neutral point indirect grounding system, when a single-phase grounding fault occurs in the neutral point indirect grounding system, fault current is capacitive current, unstable electric arcs can be ignited on a grounding point when the fault current exceeds a certain limit value, single-phase intermittent arc light grounding overvoltage is easily caused along with electromagnetic oscillation in a transient process, although the amplitude is not large, if the fault current exists for a long time, equipment with weak insulation strength can be damaged, and further more serious damages such as phase short circuit and the like can be caused.
In the prior art, some arc extinction and voltage protection devices carry out rapid overvoltage protection based on sensors or controllers such as circuit detection, but when the sensors or controllers connected into a connecting line are not subjected to signal detection processing, the sensors or controllers are damaged by overvoltage in the line, so that overvoltage protection is not guaranteed, and after long-term detection, the service lives of the sensors and the controllers can be gradually reduced, and the maintenance difficulty is greatly increased.
Therefore, it is necessary to provide an arc extinction and overvoltage protection device to solve the above problems.
Disclosure of Invention
The invention aims to provide an arc extinction and overvoltage protection device, which is characterized in that a plurality of detection boxes on a detection circuit are used for detecting a connecting circuit, the detection circuit is not directly connected with the connecting circuit and only passes through a structure on a wireless communication connecting circuit, and the detection circuit is directly powered by a solar power generation system, so that the detection circuit cannot be influenced no matter any overvoltage and resonance phenomenon occurs on the connecting circuit, the detection is stable and quick, the quick maintenance of the connecting circuit is guaranteed, and the inestimable result is avoided, so that the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: an arc extinction and overvoltage protection device comprises a connecting line and a detection circuit, wherein a voltage transformer and a high-voltage current-limiting capacitor which are connected in series with the connecting line and an arc extinction and discharge protection device which is connected in parallel with the connecting line are arranged on the connecting line, a signal receiver and a 2X capacitor are arranged inside the arc extinction and discharge protection device, a plurality of divider resistors are connected in series with the 2X capacitor, a series switch is arranged on the connecting line corresponding to each divider resistor, an access switch is arranged on a connecting wire of the divider resistors and the connecting line, two discharge resistors are connected in parallel with the 2X capacitor to form a discharge circuit, the discharge circuit is grounded, the output end of the connecting line is connected with a load, a detection box is connected in series with the detection circuit, a signal transmitter, a single chip microcomputer, a temperature sensor and a GPS (global positioning system) are arranged inside the detection box, the detection line is connected with the solar power generation system.
Preferably, the voltage transformer connecting end is equipped with the protective resistance who is used for eliminating the resonance, the inside high-voltage fuse that is equipped with of voltage transformer, voltage transformer passes through wireless communication and is connected with the singlechip.
Preferably, the resistance values of the voltage dividing resistors are respectively set from small to large.
Preferably, solar electric system is including installing at the peripheral solar photovoltaic board of interconnecting link, solar control ware and battery, the solar photovoltaic board passes through the wire and is connected with solar control ware, solar control ware passes through the wire and is connected with the battery, the battery is connected and is detected the circuit for signal transmitter, singlechip, temperature sensor and the power supply of GPS locator on for the detection circuitry.
Preferably, the single chip microcomputer is connected with the maintainer terminal through the wireless communication module, the maintainer terminal is a mobile phone or a computer, the output end of the single chip microcomputer is provided with the central processing unit, and the output end of the central processing unit is provided with the cloud server.
Preferably, the temperature sensor output passes through the amplifier and the wave filter is connected with the AD converter input, the AD converter output is connected with the signal transmitter input, signal transmitter passes through wireless connection with signal receiver, the signal receiver output is connected with the singlechip input, the singlechip passes through the D/A converter and the relay is connected with maintainer terminal, 2X electric capacity, series switch and access switch.
Preferably, the detection box sets up to a plurality ofly and series connection on detecting the circuit, detection box evenly distributed is in interconnecting link one side for detect the temperature and the detection position of interconnecting link, and the detection box that is located the neutral point department distributes densely.
The invention has the technical effects and advantages that:
1. the invention utilizes a plurality of detection boxes on the detection circuit to detect the connection circuit, the detection circuit is not directly connected with the connection circuit, only the structure on the wireless communication connection circuit is used, and the detection circuit is directly supplied with power by the solar power generation system, so that the detection circuit cannot be influenced no matter any overvoltage and resonance phenomenon occur on the connection circuit, the detection is stable and quick, the quick maintenance of the connection circuit is ensured, and the inestimable result is avoided;
2. when the temperature sensor and the voltage transformer detect overvoltage in a matched manner, the temperature sensor detects that the temperature of a certain position is higher or the temperature is higher due to a larger load, the high-voltage current-limiting capacitor disconnects a connecting circuit, the protective resistor can eliminate the resonance of the voltage transformer, the single chip microcomputer sends information to the 2X capacitor, the series switch and the access switch, the 2X capacitor, the series switch and the access switch are connected in series to the divider resistor in a matched manner and are connected to a discharge circuit, and the divider resistor is grounded to achieve the effects of arc extinction and overvoltage protection, and the single chip microcomputer sends the temperature, the voltage and the position information to an maintainer terminal, so that the maintainer can maintain and check the circuit at the positioning position to check whether the circuit is subjected to insulation layer breakdown or short circuit or the like, and the check is quick;
3. the resistance values of the divider resistors are respectively set from small to large, after the temperature sensor detects the temperature of the connecting circuit and the voltage transformer detects the current and voltage of the connecting circuit, a signal is sent to the single chip microcomputer, the single chip microcomputer controls the divider resistors with corresponding resistance values to carry out serial voltage division, and the voltage division effect is good;
4. the single chip microcomputer sends the position information of the temperature sensor, the voltage transformer and the GPS positioning to the central processing unit, the central processing unit stores the information and uploads the information to the cloud server for backup, and remote monitoring is facilitated.
Drawings
Fig. 1 is an overall circuit diagram of the present invention.
Fig. 2 is a schematic structural diagram of the working principle of the present invention.
In the figure: connecting line 1, detection circuitry 2, voltage transformer 3, high voltage current-limiting capacitor 4, arc extinction discharge protection device 5, signal receiver 6, 2X electric capacity 7, divider resistance 8, series switch 9, access switch 10, discharge resistance 11, load 12, detection box 13, signal transmitter 14, singlechip 15, temperature sensor 16, GPS locator 17, solar electric system 18, protection resistance 19, maintainer terminal 20, central processing unit 21, high in the clouds server 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments 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.
Example 1:
according to an arc extinction and overvoltage protection device shown in fig. 1-3, comprising a connection circuit 1 and a detection circuit 2, wherein the connection circuit 1 is provided with a voltage transformer 3 and a high voltage current-limiting capacitor 4 connected in series with the connection circuit 1 and an arc extinction and discharge protection device 5 connected in parallel with the connection circuit 1, the arc extinction and discharge protection device 5 is internally provided with a signal receiver 6 and a 2X capacitor 7, the 2X capacitor 7 is connected in series with a plurality of voltage dividing resistors 8, and the connection circuit 1 corresponding to each voltage dividing resistor 8 is provided with a series switch 9, the voltage dividing resistors 8 and the connection wires of the connection circuit 1 are provided with an access switch 10, the 2X capacitor 7 is connected in parallel with two discharge resistors 11 to form a discharge circuit, the discharge circuit is grounded, the output end of the connection circuit 1 is connected with a load 12, and the detection circuit 2 is connected in series with a detection box 13, the detection box 13 is internally provided with a signal emitter 14, a singlechip 15, a temperature sensor 16 and a GPS positioner 17, and the detection line 2 is connected with a solar power generation system 18.
Through utilizing a plurality of detection box 13 on the detection circuitry 2 to detect interconnecting link 1, and detection circuitry 2 does not with interconnecting link 1 lug connection, only through the structure on the wireless communication interconnecting link 1, and detection circuitry 2 is directly supplied power by solar electric system 18, therefore take place any overvoltage and resonance phenomenon on no matter interconnecting link 1, can not influence detection circuitry, it is stable quick to detect, guarantee interconnecting link 1's quick maintenance, avoid causing immeasurable consequence.
Example 2
According to the arc extinction and overvoltage protection device shown in the figures 1-4, a protection resistor 19 for eliminating resonance is arranged at the connecting end of the voltage transformer 3, a high-voltage fuse is arranged inside the voltage transformer 3, and the voltage transformer 3 is connected with the single chip microcomputer 15 through wireless communication;
the resistance values of the divider resistors 8 are respectively set from small to large, after the temperature sensor 16 detects the temperature of the connecting circuit 1 and the voltage transformer 3 detects the current and voltage of the connecting circuit 1, a signal is sent to the single chip microcomputer 15, the single chip microcomputer 15 controls the divider resistors 8 with corresponding resistance values to carry out serial voltage division, and the voltage division effect is good;
the solar power generation system 18 comprises a solar photovoltaic panel, a solar controller and a storage battery, wherein the solar photovoltaic panel, the solar controller and the storage battery are arranged on the periphery of the connection circuit 1, the solar photovoltaic panel is connected with the solar controller through a lead, the solar controller is connected with the storage battery through a lead, and the storage battery is connected with the detection circuit 2 and used for supplying power to a signal transmitter 14, a single chip microcomputer 15, a temperature sensor 16 and a GPS (global positioning system) positioner 17 on the detection circuit 2;
the single-chip microcomputer 15 is connected with an maintainer terminal 20 through a wireless communication module, the maintainer terminal 20 is a mobile phone or a computer, a central processing unit 21 is arranged at the output end of the single-chip microcomputer 15, a cloud server 22 is arranged at the output end of the central processing unit 21, the single-chip microcomputer 15 sends position information of the temperature sensor 16, the voltage transformer 3 and the GPS positioning to the central processing unit 21, the central processing unit 21 stores the information and uploads the information to the cloud server 22 for backup, and remote monitoring is facilitated;
the output end of the temperature sensor 16 is connected with the input end of an A/D converter through an amplifier and a filter, the output end of the A/D converter is connected with the input end of a signal transmitter 14, the signal transmitter 14 is connected with a signal receiver 6 through wireless communication, the output end of the signal receiver 6 is connected with the input end of a single chip microcomputer 15, the single chip microcomputer 15 is connected with an inspector terminal 20, a 2X capacitor 7, a series switch 9 and an access switch 10 through a D/A converter and a relay, when the temperature sensor 16 and a voltage transformer 3 detect overvoltage in a matched mode, the temperature sensor 16 detects that the temperature of a certain position is higher or the temperature of a load 12 is higher, the single chip microcomputer 15 sends information to the 2X capacitor 7, the series switch 9 and the access switch 10, and the 2X capacitor 7, the series switch 9 and the access switch 10 are matched to be connected in series into a divider resistor 8, the single chip microcomputer 15 sends temperature, voltage and position information to the maintainer terminal 20, so that the maintainer can conveniently maintain and check whether the insulating layer of the circuit at the positioning position is broken down or short-circuited or not, and the checking is quick;
the type of the single chip microcomputer 15 is set to be M68HC16, and the type of the temperature sensor 16 is set to be WZP-PT 100;
detect the box 13 and set up to a plurality of and series connection on detecting line 2, detect box 13 evenly distributed in interconnecting link 1 one side for detect interconnecting link 1's temperature and detection position, and the detection box 13 that is located the neutral point department distributes intensively, sets up detection box 13 at the many densities of the high department of sending out of accident, and detection effect is better, and is more accurate, and arc extinction and overvoltage protection are high efficiency more.
The working principle of the invention is as follows:
referring to the attached drawings 1-4 of the specification, when the detection circuit is used, the connection circuit 1 is detected by using the plurality of detection boxes 13 on the detection circuit 2, the detection circuit 2 is not directly connected with the connection circuit 1, only the structure on the wireless communication connection circuit 1 is used, and the detection circuit 2 is directly supplied with power by the solar power generation system 18, so that the detection circuit cannot be influenced no matter any overvoltage and resonance phenomenon occur on the connection circuit 1, the detection is stable and quick, the quick maintenance of the connection circuit 1 is guaranteed, and the inestimable result is avoided;
during detection, when the temperature sensor 16 and the voltage transformer 3 detect overvoltage in a matched manner, the temperature sensor 16 detects that the temperature of a certain position is higher or the temperature is higher due to the fact that the load 12 is larger, the high-voltage current-limiting capacitor 4 is disconnected from the connecting circuit 1, the protection resistor 19 can eliminate the resonance of the voltage transformer 3 at the moment, the single chip microcomputer 15 sends information to the 2X capacitor 7, the series switch 9 and the access switch 10, the 2X capacitor 7, the series switch 9 and the access switch 10 are connected in series in a matched manner to be connected into the divider resistor 8 and connected into the discharge circuit, and the single chip microcomputer 15 is grounded to achieve the effects of arc extinction and overvoltage protection, and sends temperature, voltage and position information to the maintainer terminal 20, so that the maintainer can maintain and check whether the circuit at the positioning position has insulation layer breakdown or short circuit or not, and the checking is quick;
in addition, the resistance values of the divider resistors 8 are respectively set from small to large, after the temperature sensor 16 detects the temperature of the connecting circuit 1 and the voltage transformer 3 detects the current and voltage of the connecting circuit 1, a signal is sent to the single chip microcomputer 15, the single chip microcomputer 15 controls the divider resistors 8 with corresponding resistance values to carry out serial voltage division, and the voltage division effect is good;
referring to the attached figure 4 of the specification, the single chip microcomputer 15 sends the position information of the temperature sensor 16, the voltage transformer 3 and the GPS positioning to the central processing unit 21, the central processing unit 21 stores the information and uploads the information to the cloud server 22 for backup, and remote monitoring is facilitated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. An arc extinction and overvoltage protection device comprises a connecting line (1) and a detection line (2), and is characterized in that: be equipped with on interconnecting link (1) series connection's voltage transformer (3) and high-voltage current-limiting capacitor (4) and with interconnecting link (1) parallel connection's arc extinction discharge protection device (5), arc extinction discharge protection device (5) inside is equipped with signal receiver (6) and 2X electric capacity (7), 2X electric capacity (7) series connection has a plurality of divider resistance (8), and is equipped with series switch (9) on interconnecting link (1) that every divider resistance (8) correspond, be equipped with on the connecting wire of divider resistance (8) and interconnecting link (1) access switch (10), 2X electric capacity (7) parallel connection has two discharge resistance (11), forms discharge circuit, discharge circuit ground connection, load (12) are connected to interconnecting link (1) output, series connection has detection box (13) on detection circuitry (2), the solar energy detection device is characterized in that a signal transmitter (14), a single chip microcomputer (15), a temperature sensor (16) and a GPS (global positioning system) positioner (17) are arranged in the detection box (13), and the detection circuit (2) is connected with a solar energy power generation system (18).
2. An arc and overvoltage protection device as claimed in claim 1 wherein: the voltage transformer (3) link is equipped with protection resistance (19) that are used for eliminating the resonance, the inside high tension fuse that is equipped with of voltage transformer (3), voltage transformer (3) are connected with singlechip (15) through wireless communication.
3. An arc and overvoltage protection device as claimed in claim 1 wherein: the resistance values of the voltage division resistors (8) are respectively set from small to large.
4. An arc and overvoltage protection device as claimed in claim 1 wherein: solar electric system (18) are including installing at peripheral solar photovoltaic board, solar control ware and the battery of interconnecting link (1), the solar photovoltaic board passes through the wire and is connected with solar control ware, solar control ware passes through the wire and is connected with the battery, detection circuitry (2) is connected to the battery for signal transmitter (14), singlechip (15), temperature sensor (16) and GPS locator (17) power supply on for detecting circuitry (2).
5. An arc and overvoltage protection device as claimed in claim 1 wherein: singlechip (15) are connected with maintainer terminal (20) through wireless communication module, maintainer terminal (20) specifically are cell-phone or computer, singlechip (15) output is equipped with central processing unit (21), central processing unit (21) output is equipped with high in the clouds server (22).
6. An arc and overvoltage protection device as claimed in claim 1 wherein: the temperature sensor (16) output passes through the amplifier and the wave filter is connected with AD converter input, the AD converter output is connected with signal transmitter (14) input, signal transmitter (14) pass through wireless connection with signal receiver (6), signal receiver (6) output is connected with singlechip (15) input, singlechip (15) pass through the DA converter and the relay is connected with maintainer terminal (20), 2X electric capacity (7), series switch (9) and access switch (10).
7. An arc and overvoltage protection device as claimed in claim 1 wherein: detect box (13) and set up to a plurality of and series connection on detecting line (2), detect box (13) evenly distributed in interconnecting link (1) one side for detect the temperature and the detection position of interconnecting link (1), and be located that detection box (13) of neutral point department distribute densely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811539921.XA CN111327034B (en) | 2018-12-17 | 2018-12-17 | Arc extinction and overvoltage protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811539921.XA CN111327034B (en) | 2018-12-17 | 2018-12-17 | Arc extinction and overvoltage protection device |
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| CN111327034A CN111327034A (en) | 2020-06-23 |
| CN111327034B true CN111327034B (en) | 2022-02-18 |
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| CN112670971B (en) * | 2020-12-15 | 2023-12-08 | 安徽凯民电力技术有限公司 | Single-phase earth fault comprehensive treatment system |
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