CN210665937U - Lightning arrester insulation on-line monitoring system based on optical fiber digitization - Google Patents
Lightning arrester insulation on-line monitoring system based on optical fiber digitization Download PDFInfo
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- CN210665937U CN210665937U CN201921542356.2U CN201921542356U CN210665937U CN 210665937 U CN210665937 U CN 210665937U CN 201921542356 U CN201921542356 U CN 201921542356U CN 210665937 U CN210665937 U CN 210665937U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 239000013307 optical fiber Substances 0.000 title claims description 20
- 238000009413 insulation Methods 0.000 title abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 230000004907 flux Effects 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 42
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The utility model relates to an insulating on-line monitoring system of arrester based on optic fibre is digital, including zero little current transformer module of magnetic flux, voltage transformer module, action counter device module, AD conversion module, first light/electricity transform module, second light/electricity transform module, electricity/light transform module, signal processing circuit module, network information conversion module, laser instrument module and power module. The system is a more reliable, more effective, safer arrester insulation on-line monitoring system based on optic fibre digitization, has a great deal of advantages such as high insulating nature, anti-electromagnetic interference, operation sensitivity, data transmission are reliable and stable. The lightning arrester leakage current signal and lightning arrester action count obtained by the micro-current sensor can be accurately and reliably obtained; therefore, whether the arrester is in a normal state or not can be monitored quickly, accurately and safely.
Description
Technical Field
The utility model relates to a metal oxide arrester insulation monitoring technical field in the transformer substation specifically is the insulating on-line monitoring system of arrester based on optic fibre digitization.
Background
At present, the main mode adopted by the power production department in China for the maintenance work of power equipment is a regular maintenance mode, namely, regular preventive tests are carried out on various types of electrical equipment according to the requirements of 'preventive test regulations of electrical equipment', or regular major maintenance and medium and minor maintenance are carried out according to the requirements of equipment maintenance guide rules. The maintenance work in the mode plays a very positive role, defects among the devices can be found timely, the device faults are prevented, and the safe operation of the devices and the power grid is guaranteed. However, due to the rapid development of power systems in recent years, the number of substations and equipment in various regions increases very rapidly, the workload is heavy, and the increase of the number of overhaul workers is delayed seriously. Therefore, an effective method is urgently needed by the power production department to reasonably allocate maintenance resources.
At the present stage, the performance detection of the metal zinc oxide arrester used by the power grid mainly depends on the following modes: and power failure detection, lightning arrester leakage current full current on-line monitoring, resistive current measurement by using a lightning arrester resistive current tester and the like. The conventional lightning arrester leakage current full current on-line monitoring instrument is not easy to find the defects of moisture and the like in the lightning arrester in time due to the defects of the lightning arrester on the principle; and because the number of the lightning arresters is large, the states of the lightning arresters need to be detected before the thunderstorm season every year, the lightning arresters are mainly detected by instruments such as a lightning arrester resistive current tester through a large amount of manpower at present, the lightning arresters are not detected any more when the thunderstorm season is reached, and the lightning arresters cannot be timely judged and solved when the lightning arresters break down in the period. Therefore, it is more important to develop a novel, practical, reasonable and effective lightning arrester insulation monitoring technology.
In order to monitor whether the arrester is insulated in the normal state quickly and accurately, the utility model discloses a more reliable, more effective, safer arrester insulation on-line monitoring system based on optical fiber digitization provides one set of optical fiber data acquisition system based on optical fiber digitization, comes accuracy, obtains the arrester leakage current signal and the arrester action count that obtain through little current sensor reliably.
Disclosure of Invention
The utility model aims at the defects, and provides an arrester insulation on-line monitoring system based on optical fiber digitization, which utilizes the application of an optical fiber data acquisition system based on optical fiber digitization in the aspect of arrester insulation monitoring to monitor the arrester insulation in real time; whether the arrester insulation is in a normal state can be monitored quickly, accurately and safely.
The utility model discloses an adopt following technical scheme to realize:
the lightning arrester insulation online monitoring system based on optical fiber digitization comprises a remote module, a local module and an upper computer of a signal acquisition module;
the signal acquisition module comprises a zero-flux micro-current transformer module, a voltage transformer module and an action counter device module;
the remote module comprises an A/D conversion module, a first optical/electrical conversion module and an electrical/optical conversion module which are connected with each other;
the local module comprises a second optical/electrical conversion module, a signal processing circuit module, a network information conversion module, a power circuit module and a laser module which are sequentially connected;
the zero-flux micro-current transformer module, the voltage transformer module, the action counter device module, the electric/optical conversion module and the first optical/electrical conversion module are respectively connected with the A/D conversion module; the electric/optical conversion module is connected with the second optical/electric conversion module through a data cable; the network information conversion module, the signal processing circuit module and the second optical/electrical conversion module are sequentially connected; the second optical/electrical conversion module and the laser module are respectively connected with the power supply module; the laser module and the first optical/electrical conversion module are connected by optical fibers.
The first optical/electrical conversion module and the second optical/electrical conversion module adopt PPC photoelectric converters which are used for converting optical signals into electrical signals; the electric/optical conversion module adopts an MP-732T/R-MM electro-optical converter, and the function of the electric/optical conversion module is to convert an electric signal into an optical signal.
An IEC61850 protocol converter is adopted in the network information conversion module, and the function of the converter is to transmit online monitoring data of the lightning arrester to an upper comprehensive processing unit through the protocol converter.
The current sensor adopts a straight-through zero-flux micro-current sensor, and dynamically compensates the exciting current of the sensor iron core by using a dynamic balance electronic circuit, so that the iron core is always in a dynamic zero-flux state, and the accuracy of measuring micro-current signals is improved.
The action counter device module consists of a zero magnetic flux current sensor, a KBP210 full-bridge rectifier chip, an STM32F407ZGT6 singlechip and a 7-inch TFT liquid crystal touch screen; and after the zero-flux current transformer is coupled with a lightning current signal from the ground wire of the lightning arrester, the lightning current signal is rectified by a full-bridge rectifier chip, input into a core processor for processing through a signal input interface and displayed on a liquid crystal.
The A/D conversion module adopts a PCF859 chip, and the lightning arrester signal passes through a zero-flux current transformer and a voltage transformer module and then is sent into the PCF859 chip to carry out analog-digital signal conversion.
The signal processing circuit module adopts an OPA2889 voltage feedback type amplifier, has the functions of rectification and filtering, and can also avoid the chip from being burnt by overlarge current due to the fact that the current has positive polarity and negative polarity.
The power circuit module adopts an industrial-grade module power supply, can realize alternating current-direct current conversion and DC/DC conversion of different voltages, selects a proper module power supply after power estimation of each module in the device, and sends current into a power supply channel of the motherboard through an interface with the motherboard to supply power for the whole device.
The utility model discloses a digital optic fibre data acquisition system of optic fibre utilizes sensor output signal directly to send forward signal conditioning unit through not any link, becomes digital signal by high accuracy AD converter, then through the electricity/light conversion, send backstage host computer data analysis system through optic fibre to guaranteed that raw data's absolute accuracy just does not receive other links to influence, just so guaranteed to measure and get the measurement accuracy of arrester full current, and then the completion is to the real-time supervision of arrester.
The utility model has the advantages that:
the utility model relates to a more reliable, more effective, safer based on the insulating on-line monitoring system of arrester of optic fibre digitization has a great deal of advantages such as high insulating nature, anti-electromagnetic interference, operation sensitivity, data transmission are reliable and stable. The lightning arrester leakage current signal and lightning arrester action count obtained by the micro-current sensor can be accurately and reliably obtained; therefore, whether the arrester is in a normal state or not can be monitored quickly, accurately and safely.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a block diagram of the hardware structure of the present invention;
fig. 2 is a schematic diagram of the system of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings and the detailed description below:
referring to the attached figure 1, the lightning arrester insulation online monitoring system based on optical fiber digitization comprises a remote module, a local module and an upper computer of a signal acquisition module;
the signal acquisition module comprises a zero-flux micro-current transformer module, a voltage transformer module and an action counter device module;
the remote module comprises an A/D conversion module, a first optical/electrical conversion module and an electrical/optical conversion module which are connected with each other;
the local module comprises a second optical/electrical conversion module, a signal processing circuit module, a network information conversion module, a power circuit module and a laser module which are sequentially connected;
the zero-flux micro-current transformer module, the voltage transformer module, the action counter device module, the electric/optical conversion module and the first optical/electric conversion module are respectively connected with the A/D conversion module; the electric/optical conversion module is connected with the second optical/electric conversion module; the signal processing circuit module is connected with the second optical/electric conversion module; the laser module is connected with the first optical/electrical conversion module; the second optical/electrical conversion module and the laser module are respectively connected with the power circuit module; the network information conversion module is connected with the signal processing circuit module.
The upper computer is a monitoring terminal PC.
Referring to the attached figure 2, when the system is used, the remote module and the local module form the optical fiber data acquisition system, and a plurality of sets of optical fiber data acquisition systems are connected through optical fibers. The remote module is arranged on the side of the high-voltage equipment and is responsible for data acquisition and conditioning of primary side voltage and current signals of the equipment, the primary side voltage and current signals are converted into digital signals, electricity/light conversion is carried out, and the signals are transmitted out through optical fibers. Each remote module can simultaneously acquire 3 paths of voltage or current signals. The local module is installed in a main control room of the transformer substation, synchronous control commands are sent to each remote module through synchronous optical fibers, data collected by each remote module are transmitted to the local module through data optical fibers and are combined and processed, and the local module is communicated with an upper computer (namely a monitoring terminal PC) through a network interface IEC61850 protocol converter. The local modules of the optical fiber data acquisition systems are connected through optical fibers, and optical synchronization signals are transmitted according to the optical synchronization signals, so that the optical synchronization between the modules is triggered to acquire data, and the real-time monitoring of the lightning arrester is completed.
Claims (7)
1. The utility model provides an insulating on-line monitoring system of arrester based on optic fibre is digital which characterized in that: the remote module, the local module and the upper computer of the signal acquisition module;
the signal acquisition module comprises a zero-flux micro-current transformer module, a voltage transformer module and an action counter device module;
the remote module comprises an A/D conversion module, a first optical/electrical conversion module and an electrical/optical conversion module which are connected with each other;
the local module comprises a second optical/electrical conversion module, a signal processing circuit module, a network information conversion module, a power circuit module and a laser module which are sequentially connected;
the zero-flux micro-current transformer module, the voltage transformer module, the action counter device module, the electric/optical conversion module and the first optical/electric conversion module are respectively connected with the A/D conversion module; the electric/optical conversion module is connected with the second optical/electric conversion module through a data cable; the network information conversion module, the signal processing circuit module and the second optical/electrical conversion module are sequentially connected; the second optical/electrical conversion module and the laser module are respectively connected with the power supply module; the laser module and the first optical/electrical conversion module are connected by optical fibers.
2. The on-line monitoring system of claim 1, wherein: the first optical/electrical conversion module and the second optical/electrical conversion module adopt PPC photoelectric converters, and the electrical/optical conversion module adopts MP-732T/R-MM electro-optical converters.
3. The on-line monitoring system of claim 1, wherein: an IEC61850 protocol converter is adopted in the network information conversion module, and a through zero-flux micro-current sensor is adopted as the current sensor.
4. The on-line monitoring system of claim 1, wherein: the action counter device module consists of a zero magnetic flux current sensor, a KBP210 full-bridge rectifier chip, an STM32F407ZGT6 singlechip and a 7-inch TFT liquid crystal touch screen; and after the zero-flux current transformer is coupled with a lightning current signal from the ground wire of the lightning arrester, the lightning current signal is rectified by a full-bridge rectifier chip, input into a core processor for processing through a signal input interface and displayed on a liquid crystal.
5. The on-line monitoring system of claim 4, wherein: the A/D conversion module adopts a PCF859 chip, and the lightning arrester signal passes through a zero-flux current transformer and a voltage transformer module and then is sent into the PCF859 chip to carry out analog-digital signal conversion.
6. The on-line monitoring system of claim 1, wherein: the signal processing circuit module adopts an OPA2889 voltage feedback type amplifier, the power supply circuit module adopts an industrial module power supply, and the power supply circuit sends current into a power supply channel of a motherboard through an interface with the motherboard to supply power for the whole device.
7. The on-line monitoring system of claim 1, wherein: the upper computer is a monitoring terminal PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921542356.2U CN210665937U (en) | 2019-09-17 | 2019-09-17 | Lightning arrester insulation on-line monitoring system based on optical fiber digitization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921542356.2U CN210665937U (en) | 2019-09-17 | 2019-09-17 | Lightning arrester insulation on-line monitoring system based on optical fiber digitization |
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| Publication Number | Publication Date |
|---|---|
| CN210665937U true CN210665937U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921542356.2U Active CN210665937U (en) | 2019-09-17 | 2019-09-17 | Lightning arrester insulation on-line monitoring system based on optical fiber digitization |
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| Country | Link |
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| CN (1) | CN210665937U (en) |
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- 2019-09-17 CN CN201921542356.2U patent/CN210665937U/en active Active
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