CN212341416U - Lightning arrester on-line monitoring system - Google Patents
Lightning arrester on-line monitoring system Download PDFInfo
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- CN212341416U CN212341416U CN202021025388.8U CN202021025388U CN212341416U CN 212341416 U CN212341416 U CN 212341416U CN 202021025388 U CN202021025388 U CN 202021025388U CN 212341416 U CN212341416 U CN 212341416U
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- monitoring system
- current
- arrester
- voltage
- acquisition unit
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to an arrester on-line monitoring system, including arrester and arrester ground return circuit, its characterized in that: an online monitoring system is connected in series on the arrester grounding circuit, and comprises a signal acquisition unit and a data receiving unit for monitoring acquired signals; the data acquired by the signal acquisition unit is transmitted to the data receiving unit through a GPRS network, and the signal acquisition unit comprises a current transmitter for acquiring full current signals, a single-turn core-through current sensor, a full current display instrument panel, a discharge counter, an embedded system and a GPRS network communicator; the utility model discloses the practicality is strong, easily promotes.
Description
Technical Field
The utility model belongs to the technical field of the on-line monitoring system technique and specifically relates to a lightning arrester on-line monitoring system is related to.
Background
66kV and above transmission cables are important components of an important component network of an urban power grid, and by 10 months in 2014, the total length of a national power grid system is 17535 km when a 66-500 kV cable line is operated, and about 30000 lightning arresters operate on the line.
The cable arrester is an important overvoltage protection electrical appliance in a cable line, and it is important to ensure the safe operation of the arrester. The lightning arresters for the cables are all zinc oxide lightning arresters (MOA), and in the long-term operation process of the MOA lightning arresters, on one hand, the MOA lightning arresters bear power frequency voltage and impact voltage for a long time, leakage current flows through, and the zinc oxide valve plates are aged and even subjected to thermal breakdown under the long-term action; on the other hand, the interior of the lightning arrester is affected by the environment and is affected by moisture and deterioration. When the MOA arrester is affected by the above reasons to cause the insulation performance to be reduced, the power equipment connected in parallel with the MOA arrester will lose protection. First, traditional tradition needs external power supply to operate to MOA arrester usually, but remote unmanned area, and the detection power supply of external low pressure of being difficult to leads to, and the far side on-line monitoring degree of difficulty is high.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an arrester on-line monitoring system.
The technical scheme of the utility model is realized like this: the utility model provides an arrester on-line monitoring system, includes arrester and arrester ground return, its characterized in that: an online monitoring system is connected in series on the arrester grounding circuit, and comprises a signal acquisition unit and a data receiving unit for monitoring acquired signals; the data acquired by the signal acquisition unit is transmitted to the data receiving unit through a GPRS network, and the signal acquisition unit comprises a current transmitter for acquiring full current signals, a single-turn core-through current sensor, a full current display instrument panel, a discharge counter, an embedded system and a GPRS network communicator; the power supply CT directly induces alternating voltage from line running current, and after full-wave rectification conversion is carried out through a rectifier bridge, stable direct voltage is obtained on a voltage stabilizing capacitor and then converted into a stable power supply through a filter circuit and a voltage stabilizing block, so that power is supplied to the signal acquisition unit and the data receiving unit.
Preferably: the iron core of the power supply CT uses magnetic materials with high magnetic permeability and low saturation magnetic induction intensity.
Preferably: in the process that alternating current voltage induced by circuit operation current of the CT power supply is communicated with the rectifier bridge, high-voltage protection power is connected in series.
Preferably: the DC voltage transmitted from the voltage stabilizing capacitor stores the redundant energy in the energy storage voltage stabilizing capacitor through the bleeder circuit.
Preferably: the data receiving unit comprises an MCU (microprogrammed control unit) and an SRAM (static random access memory), and signals acquired by the data acquisition unit through the GPRS network communicator are transmitted to the MCU through the electric signal amplifier and are stored by the SRAM.
Compared with the prior art, the utility model discloses the beneficial effect who brings does:
1. firstly, the passive monitor adopted by the monitoring system adopts a low-power chip inside, can work without external power supply (namely passive), does not need other auxiliary signals at the same time, is directly connected in series in a grounding loop of the lightning arrester, monitors the leakage current and the lightning stroke frequency of the lightning arrester on line,
in addition, the current transducer is adopted to collect the full current signal, the single-turn through-core current sensor is selected to transmit the full current signal to the data receiving unit, the MCU micro control unit is used for carrying out linearization processing and calculation, the quantity relation between the resistive current and the full current is analyzed, and the phase difference between the resistive component and the full current is measured to calculate and calculate the resistive current of the arrester.
2. The cable arrester is usually in the field or unattended area, often difficult to obtain the low-voltage power supply that the system acquisition terminal needs work; the alternating voltage can be induced from the running current of the circuit directly by the power supply CT, the stable direct voltage can be obtained on the voltage stabilizing capacitor C after full-wave rectification and conversion, and then the stable power supply is converted by the filter circuit and the voltage stabilizing block, so that the remote unmanned area can be realized, and the low-voltage stable direct current power supply can be effectively provided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 view of an embodiment of the present invention;
FIG. 2 is a detailed block diagram of a signal acquisition unit;
fig. 3 is a schematic circuit diagram of the power supply CT.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, the utility model discloses an arrester on-line monitoring system, which comprises an arrester and an arrester ground circuit, in the specific embodiment of the utility model, an on-line monitoring system is connected in series on the arrester ground circuit, and the on-line monitoring system comprises a signal acquisition unit 1 and a data receiving unit 2 for monitoring the acquired signal; the data acquired by the signal acquisition unit 1 are transmitted to the data receiving unit 2 through a GPRS network, and the signal acquisition unit 1 comprises a current transmitter 21 for acquiring full current signals, a single-turn core-through current sensor 22, a full current display instrument panel 23, a discharge counter 24, an embedded system 25 and a GPRS network communicator 26; the power supply CT directly induces alternating voltage from line running current, and after full-wave rectification conversion is carried out through a rectifier bridge, stable direct voltage is obtained on a voltage stabilizing capacitor and then converted into a stable power supply through a filter circuit and a voltage stabilizing block, so that power is supplied to the signal acquisition unit and the data receiving unit.
In one embodiment of the present invention, the core of the power CT is made of a magnetic material with high magnetic permeability and low saturation magnetic induction.
The utility model discloses in the concrete implementation mode, the CT power communicates with the in-process of rectifier bridge from the alternating voltage that the circuit operating current was induced, and it has high-voltage protection electric power to establish ties.
The utility model discloses in the concrete implementation mode, the dc voltage who transmits out on the steady voltage electric capacity passes through bleeder circuit and will store energy the surplus energy on the steady voltage electric capacity.
The utility model discloses in the concrete implementation mode, the data receiving unit includes MCU little the control unit and SRAM static memory, and the signal that the data acquisition unit gathered through GPRS network communication ware passes through electric signal amplifier and transmits to MCU little the control unit to be stored by SRAM static memory.
Compared with the prior art, the utility model discloses the beneficial effect who brings does:
1. firstly, the passive monitor adopted by the monitoring system adopts a low-power chip inside, can work without external power supply (namely passive), does not need other auxiliary signals at the same time, is directly connected in series in a grounding loop of the lightning arrester, monitors the leakage current and the lightning stroke frequency of the lightning arrester on line,
in addition, the current transducer is adopted to collect the full current signal, the single-turn through-core current sensor is selected to transmit the full current signal to the data receiving unit, the MCU micro control unit is used for carrying out linearization processing and calculation, the quantity relation between the resistive current and the full current is analyzed, and the phase difference between the resistive component and the full current is measured to calculate and calculate the resistive current of the arrester.
2. The cable arrester is usually in the field or unattended area, often difficult to obtain the low-voltage power supply that the system acquisition terminal needs work; the alternating voltage can be induced from the running current of the circuit directly by the power supply CT, the stable direct voltage can be obtained on the voltage stabilizing capacitor C after full-wave rectification and conversion, and then the stable power supply is converted by the filter circuit and the voltage stabilizing block, so that the remote unmanned area can be realized, and the low-voltage stable direct current power supply can be effectively provided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an arrester on-line monitoring system, includes arrester and arrester ground return, its characterized in that: an online monitoring system is connected in series on the arrester grounding circuit, and comprises a signal acquisition unit and a data receiving unit for monitoring acquired signals; the data acquired by the signal acquisition unit is transmitted to the data receiving unit through a GPRS network, and the signal acquisition unit comprises a current transmitter for acquiring full current signals, a single-turn core-through current sensor, a full current display instrument panel, a discharge counter, an embedded system and a GPRS network communicator; the power supply CT directly induces alternating voltage from line running current, and after full-wave rectification conversion is carried out through a rectifier bridge, stable direct voltage is obtained on a voltage stabilizing capacitor and then converted into a stable power supply through a filter circuit and a voltage stabilizing block, so that power is supplied to the signal acquisition unit and the data receiving unit.
2. The on-line monitoring system for the lightning arrester according to claim 1, characterized in that: the iron core of the power supply CT uses magnetic materials with high magnetic permeability and low saturation magnetic induction intensity.
3. The on-line monitoring system for the lightning arrester according to claim 2, characterized in that: in the process that alternating current voltage induced by circuit operation current of the CT power supply is communicated with the rectifier bridge, high-voltage protection power is connected in series.
4. The on-line monitoring system for the lightning arrester according to claim 3, characterized in that: the DC voltage transmitted from the voltage stabilizing capacitor stores the redundant energy in the energy storage voltage stabilizing capacitor through the bleeder circuit.
5. The on-line monitoring system for the lightning arrester according to claim 4, characterized in that: the data receiving unit comprises an MCU (microprogrammed control unit) and an SRAM (static random access memory), and signals acquired by the data acquisition unit through the GPRS network communicator are transmitted to the MCU through the electric signal amplifier and are stored by the SRAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021025388.8U CN212341416U (en) | 2020-06-05 | 2020-06-05 | Lightning arrester on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021025388.8U CN212341416U (en) | 2020-06-05 | 2020-06-05 | Lightning arrester on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212341416U true CN212341416U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021025388.8U Expired - Fee Related CN212341416U (en) | 2020-06-05 | 2020-06-05 | Lightning arrester on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212341416U (en) |
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2020
- 2020-06-05 CN CN202021025388.8U patent/CN212341416U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210112 |