CN203825111U - Zinc oxide lightning arrester on-line monitoring device - Google Patents
Zinc oxide lightning arrester on-line monitoring device Download PDFInfo
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- CN203825111U CN203825111U CN201420125019.4U CN201420125019U CN203825111U CN 203825111 U CN203825111 U CN 203825111U CN 201420125019 U CN201420125019 U CN 201420125019U CN 203825111 U CN203825111 U CN 203825111U
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- monitoring device
- lightning arrester
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- reference voltage
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 60
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 22
- 229960001296 zinc oxide Drugs 0.000 claims description 17
- 230000005622 photoelectricity Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 238000004078 waterproofing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 238000007781 pre-processing Methods 0.000 abstract 4
- 238000005070 sampling Methods 0.000 abstract 2
- 238000002955 isolation Methods 0.000 abstract 1
- 238000013024 troubleshooting Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a zinc oxide lightning arrester on-line monitoring device. The zinc oxide lightning arrester on-line monitoring device includes a plurality of reference voltage monitoring devices which are used for monitoring voltage at two ends of lightning arrester equipment, and a plurality of lightning arrester current monitoring devices which are used for monitoring leakage current at the tail end of the lightning arrester. According to the reference voltage monitoring device, a current sensor 1 and a current sensor 2 are respectively connected with a pre-processing unit; the pre-processing unit, a sampling holding unit, an analog-to-digital conversion unit and a computer are connected in series sequentially; a phase-locked frequency multiplication unit is connected in parallel between the pre-processing unit and the sampling holding unit; a photoelectric isolation unit is connected with the computer, the analog-to-digital conversion unit and the pre-processing unit respectively; and the computer is provided with a communication interface and a data memory. The zinc oxide lightning arrester on-line monitoring device of the utility model can perform remote, real-time and online monitoring on zinc oxide lightning arresters, and has high detection precision, and can monitor the operating states of metal oxide lightning arresters real time and can perform troubleshooting timely.
Description
Technical field
The utility model relates to power equipment Performance Detection field, relates in particular to a kind of Zinc-Oxide Arrester on-Line Monitor Device.
Background technology
Zinc-Oxide Arrester is the important protection equipment of supply line and power-supply unit, if the lightning arrester in electric system is aging, damage or lost efficacy, may cause large-scale power accident, cause power equipment damage, supply line have a power failure.Conventional detection method is to carry out regular power failure test, inspection and maintenance, and this method is difficult to reflect in time the insulation latency fault of device interior, has certain blindness, has also caused the waste of a large amount of manpower and materials simultaneously; And trial voltage often will be lower than working voltage, therefore its equivalence is relatively poor, sensitive not to some defect reflection, can not adapt to safety, economy, the stable operation demand of electrical network completely.
Although there is the charged detecting instrument that some are easy to carry at present, can directly measure the performance parameter such as Leakage Current, voltage of lightning arrester, adopt these instruments to detect and exist the shortcomings such as accuracy of detection is low, real-time is inadequate lightning arrester.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, a kind of Zinc oxide arrester on-line monitoring system has been proposed, this system can be carried out long-range real time on-line monitoring to Zinc-Oxide Arrester, detection degree of accuracy is high, and running status that can Real-Time Monitoring metal oxide arrester is also fixed a breakdown in time.
To achieve these goals, the utility model adopts following technical scheme:
A kind of Zinc-Oxide Arrester on-Line Monitor Device, comprising: some for monitoring the reference voltage monitoring device, some for monitoring the lightning arrester current monitoring device of leakage current of lightning arrester end of lightning arrester equipment both end voltage;
Described reference voltage monitoring device comprises: current sensor one is connected with pre-process unit respectively with current sensor two; Pre-process unit, sample holding unit, AD conversion unit and computing machine are connected in series successively; Phase locking frequency multiplying unit is connected in parallel between described pre-process unit and sample holding unit, and photoelectricity isolated location is connected respectively with computing machine, D/A conversion unit and pre-process unit, and computing machine is provided with communication interface and data-carrier store.
Described lightning arrester current monitoring device comprises: current sensor three is connected with pre-process unit respectively with current sensor four; Pre-process unit, sample holding unit, AD conversion unit and computing machine are connected in series successively; Phase locking frequency multiplying unit is connected in parallel between described pre-process unit and sample holding unit, and photoelectricity isolated location is connected respectively with computing machine, D/A conversion unit and pre-process unit, and computing machine is provided with communication interface and data-carrier store.
Described current sensor four is zero magnetic flux current sensor, is placed in lightning arrester current monitoring device outside.
Described current sensor four is connected to lightning arrester end, for gathering the current signal of lightning arrester end.
The data that described reference voltage monitoring device and lightning arrester current monitoring device are surveyed are sent to data monitor center by RS485 network.
Described reference voltage monitoring device is connected to by specialized power cable the PT terminal box that lightning arrester is corresponding.
The communication interface of described reference voltage monitoring device and lightning arrester current monitoring device Computer is connected with RS485 network interface.
Described reference voltage monitoring device and lightning arrester current monitoring device all adopt IP65 level waterproofing design.
The beneficial effects of the utility model are:
Native system has high reliability, security and relatively cheap price, can be installed to every group of transmission line of electricity Zinc-Oxide Arrester detects in real time, realize concentrate monitoring, effectively improved leakage conductor tour efficiency, alleviate tour personnel's labour intensity; Accomplish accurately and timely to grasp the health status of operational outfit, operations staff is grasped and advanced processing accident potential in time, ensure electric power network safe power supply.
Compared with existing detection mode, the utlity model has following advantage:
(1) Real-Time Monitoring: every performance data of round-the-clock 24 hours uninterrupted on-line monitoring Zinc-Oxide Arresters, and can process in real time and state early warning image data.
(2) current sensor is to adopt the high-accuracy leakage current sensor of permalloy as iron core, can detect by high-accuracy faint ac leakage current, and phase error is less than 1 point.
(3) lightning arrester current monitoring device adopts capacitive current compensation method to carry out the diagnosis of apparatus insulated state, can effectively weaken the impacts of factor on current in resistance property measurement result such as environment, power frequency interference, the high pressure P T of transformer station, greatly improve the confidence level of running status diagnostic result.
(4) reference voltage monitoring device and lightning arrester current monitoring device inside
The signal transducer and the monitoring device that adopt IP65 level waterproofing design, meet the outdoor request for utilization of extreme weather.
Brief description of the drawings
Fig. 1 is the utility model Zinc-Oxide Arrester on-Line Monitor Device structural representation;
Fig. 2 is the utility model reference voltage monitoring device and lightning arrester current monitoring device connection diagram;
Fig. 3 is the utility model reference voltage monitoring device structural representation;
Fig. 4 is the utility model lightning arrester current monitoring device structural representation;
Fig. 5 is the utility model pre-process element circuit figure.
Wherein, 1. current sensor one, 2. current sensor two, 3. pre-process unit, 4. sample holding unit, 5. phase locking frequency multiplying unit, 6. AD conversion unit, 7. computing machine, 8. communication interface, 9. data-carrier store, 10. photoelectricity isolated location, 11. current sensor three, 12. current sensors four, 13. reference voltage monitoring devices, 14. lightning arrester current monitorings.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
With reference to figure 1, a kind of Zinc-Oxide Arrester on-Line Monitor Device, comprising: some for monitoring the reference voltage monitoring device 13, some for monitoring the lightning arrester current monitoring device 14 of leakage current of lightning arrester end of lightning arrester equipment both end voltage; The data that reference voltage monitoring device 13 and lightning arrester current monitoring device 14 are surveyed are sent to data monitor center by RS485 network.
For reference voltage monitoring device 13 and lightning arrester monitoring device 14 can be introduced to cophase supply power supply simultaneously, conventionally these two equipment are arranged on the cement pole of lightning arrester high-tension apparatus below.
With reference to figure 2-Fig. 4, reference voltage monitoring device 13 comprises: current sensor 1 is connected with pre-process unit 3 respectively with current sensor 22; Pre-process unit 3, sample holding unit 4, AD conversion unit 6 and computing machine 7 are connected in series successively; Phase locking frequency multiplying unit 5 is connected in parallel between described pre-process unit 3 and sample holding unit 4, and photoelectricity isolated location 10 is connected respectively with computing machine 7, D/A conversion unit 6 and pre-process unit 3, and computing machine 7 is provided with communication interface 8 and data-carrier store 9.
Lightning arrester current monitoring device 14 comprises: current sensor 3 11 is connected with pre-process unit 3 respectively with current sensor 4 12; Pre-process unit 3, sample holding unit 4, AD conversion unit 6 and computing machine 7 are connected in series successively; Phase locking frequency multiplying unit 5 is connected in parallel between described pre-process unit 3 and sample holding unit 4, and photoelectricity isolated location 10 is connected respectively with computing machine 7, D/A conversion unit and 6 pre-process unit 3, and computing machine 7 is provided with communication interface 8 and data-carrier store 9.
As shown in Figure 5, pre-process unit comprises: the current signal that sensor collects and voltage signal enter sample holding unit respectively after signal balancing treatment circuit, signal processing circuit and signal are followed treatment circuit.
Taking voltage signal processing procedure as example, signal balancing treatment circuit comprises: voltage signal enters No. 3 pins of operational amplifier U15, between No. 1 pin of operational amplifier U15 and No. 8 pins, meet variable resistor W1, No. 2 pins of operational amplifier U15 are connected with No. 6 pins, No. 7 and No. 4 pins connect respectively positive and negative 15V power supply, and No. 4 pins of operational amplifier U15 are ground connection, No. 7 pins ground connection after capacitor C 5 after capacitor C 2.Above-mentioned operational amplifier model is OP07.
Signal processing circuit comprises: No. 1, No. 2 and No. 9 pin ground connection of operational amplifier U20, No. 8 and No. 3 pins connect respectively positive and negative 15V power supply, No. 3 pins of operational amplifier U20 are ground connection, No. 8 pins ground connection after capacitor C 9 after capacitor C 7, No. 4, No. 5 pin accesses respectively VFD, No. 6 pin connecting resistance R53 and R55 respectively, No. 10 pins of operational amplifier U20 are connected with No. 6 pins of operational amplifier U15.Above-mentioned operational amplifier model is AD8253.
Signal is followed treatment circuit and is comprised: No. 1 of operational amplifier U23 and No. 8 pins unsettled, No. 2 pin is connected with No. 6 pins, No. 7 and No. 4 pins connect respectively positive and negative 15V power supply, No. 7 pins of operational amplifier U23 are ground connection, No. 4 pins ground connection after capacitor C 13 after capacitor C 17, and No. 3 pins of operational amplifier U23 are connected with No. 7 pins of operational amplifier U20 through resistance R 6.Above-mentioned operational amplifier model is OP07.
Current sensor 4 12 is zero magnetic flux current sensor, is placed in lightning arrester current monitoring device 14 outsides.Current sensor 4 12 is connected to lightning arrester end, for gathering the current signal of lightning arrester end.Reference voltage monitoring device 13 is connected to by specialized power cable the PT terminal box that lightning arrester is corresponding.The communication interface of reference voltage monitoring device 13 and lightning arrester current monitoring device 14 Computers is connected with RS485 network interface.
Reference voltage monitoring device 13 and lightning arrester current monitoring device 14 all adopt IP65 level waterproofing design.
Reference voltage monitoring device 13 and lightning arrester current monitoring device 14, access cophase supply power supply AC220V, and transfer by series resistor the signal that current sensor is identified to.Except access power supply signal, reference voltage monitoring device 13 accesses the voltage signal at lightning arrester equipment PT secondary side two ends, transfers the signal of current transformer identification by series resistor and insurance to; Lightning arrester current monitoring device 14 accesses the voltage signal that zero magnetic flux current sensor of lightning arrester equipment end transmits.The output of sensor is voltage signal
Reference voltage monitoring device 13 and lightning arrester monitoring device 14 are for gathering the phase differential relation of voltage and leakage current data and voltage and electric current at lightning arrester equipment two ends, then data separately and phase information are arrived to Surveillance center by RS485 network delivery, the phase data of two equipment is calculated by Surveillance center, just can obtain the phase differential of real voltage and electric current, and then obtaining the capacitive composition of lightning arrester equipment leakage current, resistive composition and power attenuation, Surveillance center utilizes database technology that these information are stored, analyzed and diagnose.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection domain of the present utility model.
Claims (7)
1. a Zinc-Oxide Arrester on-Line Monitor Device, is characterized in that, comprising: some for monitoring the reference voltage monitoring device, some for monitoring the lightning arrester current monitoring device of leakage current of lightning arrester end of lightning arrester equipment both end voltage;
Described reference voltage monitoring device comprises: current sensor one is connected with pre-process unit respectively with current sensor two; Pre-process unit, sample holding unit, AD conversion unit and computing machine are connected in series successively; Phase locking frequency multiplying unit is connected in parallel between described pre-process unit and sample holding unit, and photoelectricity isolated location is connected respectively with computing machine, D/A conversion unit and pre-process unit, and computing machine is provided with communication interface and data-carrier store.
2. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 1, is characterized in that, described lightning arrester current monitoring device comprises: current sensor three is connected with pre-process unit respectively with current sensor four; Pre-process unit, sample holding unit, AD conversion unit and computing machine are connected in series successively; Phase locking frequency multiplying unit is connected in parallel between described pre-process unit and sample holding unit, and photoelectricity isolated location is connected respectively with computing machine, D/A conversion unit and pre-process unit, and computing machine is provided with communication interface and data-carrier store.
3. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 2, is characterized in that, described current sensor four is zero magnetic flux current sensor, is placed in lightning arrester current monitoring device outside;
Described current sensor four is connected to lightning arrester end, for gathering the current signal of lightning arrester end.
4. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 1, is characterized in that, the data that described reference voltage monitoring device and lightning arrester current monitoring device are surveyed are sent to data monitor center by RS485 network.
5. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 1, is characterized in that, described reference voltage monitoring device is connected to by specialized power cable the PT terminal box that lightning arrester is corresponding.
6. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 1, is characterized in that, the communication interface of described reference voltage monitoring device and lightning arrester current monitoring device Computer is connected with RS485 network interface.
7. a kind of Zinc-Oxide Arrester on-Line Monitor Device as claimed in claim 1, is characterized in that, described reference voltage monitoring device and lightning arrester current monitoring device all adopt IP65 level waterproofing design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125019.4U CN203825111U (en) | 2014-03-19 | 2014-03-19 | Zinc oxide lightning arrester on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125019.4U CN203825111U (en) | 2014-03-19 | 2014-03-19 | Zinc oxide lightning arrester on-line monitoring device |
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| CN203825111U true CN203825111U (en) | 2014-09-10 |
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| CN201420125019.4U Expired - Fee Related CN203825111U (en) | 2014-03-19 | 2014-03-19 | Zinc oxide lightning arrester on-line monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360138A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Wireless remote transmission system for online monitoring of electric transmission line arrester |
| CN105158552A (en) * | 2015-08-26 | 2015-12-16 | 芜湖市凯鑫避雷器有限责任公司 | Zinc oxide arrester leakage current monitoring system |
-
2014
- 2014-03-19 CN CN201420125019.4U patent/CN203825111U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360138A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Wireless remote transmission system for online monitoring of electric transmission line arrester |
| CN105158552A (en) * | 2015-08-26 | 2015-12-16 | 芜湖市凯鑫避雷器有限责任公司 | Zinc oxide arrester leakage current monitoring system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20160319 |
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| CF01 | Termination of patent right due to non-payment of annual fee |