CN104655969A - Zinc oxide arrester online monitoring system - Google Patents
Zinc oxide arrester online monitoring system Download PDFInfo
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- CN104655969A CN104655969A CN201510121777.8A CN201510121777A CN104655969A CN 104655969 A CN104655969 A CN 104655969A CN 201510121777 A CN201510121777 A CN 201510121777A CN 104655969 A CN104655969 A CN 104655969A
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Abstract
The invention discloses a zinc oxide arrester online monitoring system which comprises a core processing circuit, a liquid crystal display circuit, a power supply, a real-time clock circuit, a sampling circuit and a communication circuit, wherein the liquid crystal display circuit, the power supply, the real-time clock circuit, the sampling circuit and the communication circuit are respectively connected with the core processing circuit. According to the zinc oxide arrester online monitoring system disclosed by the invention, the leakage current of the zinc oxide arrester is dynamically sampled, recorded and analyzed in real time, so that the insulating faults of the zinc oxide arrester can be found in the early stage, and the collected monitoring data is transmitted by way of various communication modes.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of Zinc oxide arrester on-line monitoring system.
Background technology
Transmission line of electricity is responsible for conveying and distributes the vital task of electric energy.Transmission line of electricity is the district occurred frequently of lightning hazards, no matter is direct stroke, or indirect lightning strike, all may damage transmission line equipment, also may cause coupled device damage simultaneously.Therefore, the ultra-high-tension power transmission line of electric system, should install a set of perfect lightning protection device, guarantee transmission line of electricity safe operation.
Lightning arrester is the important proterctive equipment ensureing safe operation of power system, can limit Lightning Over-voltage or switching overvoltage after it accesses protected electrical equipment.The lightning arrester of current electric substation mainly contains valve-type arrester and Zinc-Oxide Arrester two kinds.Zinc-Oxide Arrester (MOA) is non-linear good due to it, and through-current capability is strong, is widely used in the overvoltage protection of transmission line of electricity and progressively replaces valve-type arrester.
Under the effect of ac high-voltage, flow through in total leakage current of gapless MOA and comprise current in resistance property (real component) and capacity current (idle component), main electrical current is capacity current.Flowing through of current in resistance property, can make valve block temperature raise.In normal operation, current in resistance property only accounts for very fraction, is about 10% ~ 20%, and therefore thermal value is less, substantially keeps balancing with the heat radiation of MOA self.But the valve block resistance of MOA is bearing under power-frequency voltage effect for a long time, progressively aging, the resistive component in leakage current is increased; In addition, due to reasons such as lightning arrester fault of construction, poor sealing, inner valve block make moist, leakage current is caused sharply to increase.Once thermal runaway occurs MOA, MOA explosion accident will be caused, cause line outage.Relevant MOA blasts and causes the accident of power failure often to have report.Therefore, for guaranteeing MOA safe operation, need regularly to carry out state of insulation detection to MOA.
At present, the method for Zinc-Oxide Arrester on-line monitoring mainly contains: total leakage current method, phase shift offset measurement current in resistance property method, third harmonic method etc.
Total leakage current method (daily tour meter reading writing-method) is method the most frequently used at present, although play early detection MOA to a certain extent to intake the insulation fault effect caused, but, this total current monitoring method is aging to valve block, and the monitoring that the current in resistance property that especially premature ageing causes changes is insensitive.Desirable repair based on condition of component effect can not be played to MOA; And this method by manual patrol record also needs the manpower and materials of at substantial (being in outlying ungetable transformer station all the more so).Phase shift method of offset test current in resistance property method has several defect being difficult to overcome.Fact proved, at present due to the existence of a large amount of harmonic source, make in busbar voltage containing third harmonic voltage.Also to get PT voltage at the scene in addition, operate cumbersome.Third harmonic method, due to MOA valve block non-linear resistance, so that under fundamental voltage effect, also can cause resistive triple harmonic current, therefore, if exist in busbar voltage harmonic voltage little time, this method can according to the size detecting triple harmonic current change, the correct size inferring or calculate current in resistance property.But, if when containing larger harmonic voltage composition in busbar voltage, also can measuring result error be caused.
In addition, these on-line monitoring systems carry out cable distribution on electric substation's digging in-situ ground at present, and not only construction work amount is large, and the ground of electric substation is neatly damaged.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of Zinc oxide arrester on-line monitoring system is provided, dynamic realtime sampling, record be have employed to the leakage current of Zinc-Oxide Arrester and analyze, the insulation fault of early detection Zinc-Oxide Arrester, and the Monitoring Data of collection is carried out data transmission by multiple communication modes, excavation ground is not needed to carry out cable distribution, simple to operate.
A kind of technical scheme realizing above-mentioned purpose is: a kind of Zinc oxide arrester on-line monitoring system, comprise core processing circuit, liquid crystal display circuit, power supply, real time clock circuit, sample circuit and communicating circuit, described liquid crystal display circuit, power supply, real time clock circuit, sample circuit and communicating circuit are connected with described core processing circuit respectively, wherein:
Described power supply comprises electric power management circuit, 220V alternating current, accumulator and solar panel, described 220V alternating current, accumulator are connected with the input end of described electric power management circuit respectively with solar panel, and the output terminal of described electric power management circuit is connected with described core processing circuit;
Described sample circuit comprises Zinc-Oxide Arrester, protection circuit, counting thunder circuit, Leakage Current sample circuit and sampling controller, described Zinc-Oxide Arrester is connected with the input end of described protection circuit, the input end of described counting thunder circuit is connected with the output terminal of described protection circuit respectively with the input end of Leakage Current sample circuit, the output terminal of described counting thunder circuit is connected with the input end of described sampling controller respectively with the output terminal of Leakage Current sample circuit, and the output terminal of described sampling controller is connected with described core processing circuit;
Described communicating circuit comprises wireless module, RS485 circuit, data acquisition unit and host computer, the input end of described wireless module is connected with described core processing circuit respectively with the input end of described RS485 circuit, the output terminal of described wireless module is connected with described data acquisition unit respectively with the output terminal of described RS485 circuit, and described data acquisition unit is connected with described host computer.
Above-mentioned a kind of Zinc oxide arrester on-line monitoring system, wherein, described power supply is that described core processing circuit is powered;
Described sample circuit scene completes the sampling of the leakage current data of described Zinc-Oxide Arrester, and leakage current data is transferred to described core processing circuit;
Described core processing circuit carries out digital frequency analysis to described leakage current data, obtain the real-time waveform data of fundamental current, triple harmonic current data and sampling, and the real-time waveform data of this fundamental current, triple harmonic current data and sampling is transferred to described liquid crystal display circuit and communicating circuit;
The real-time waveform data of fundamental current described in the on-the-spot liquid crystal display of described liquid crystal display circuit, triple harmonic current data and sampling;
The described data acquisition unit of described communicating circuit collects the real-time waveform data by the fundamental current from described core processing circuit of described wireless module and the conveying of RS485 circuit, triple harmonic current data and sampling, and is uploaded to described host computer.
Above-mentioned a kind of Zinc oxide arrester on-line monitoring system, wherein, described wireless module is the wireless communication line of 20dBm emissive power, ISM (Industrial Scientific Medical) working frequency range, employing FSK (Frequency-shift keying, frequency shift keying) modulation system.
Above-mentioned a kind of Zinc oxide arrester on-line monitoring system, wherein, described core processing circuit possesses analog to digital conversion interface and GPIO mouth, the output terminal of described sampling controller is connected with the analog to digital conversion interface of described core processing circuit, and the input end of described wireless module is connected with the GPIO mouth of described core processing circuit respectively with the input end of described RS485 circuit.
Above-mentioned a kind of Zinc oxide arrester on-line monitoring system, wherein, described data acquisition unit possesses wireless communication interface and RS485 wire communication interface, the output terminal of described wireless module is connected with the wireless communication interface of described data acquisition unit, and the output terminal of described RS485 circuit is connected with the RS485 wire communication interface of described data acquisition unit.
Above-mentioned a kind of Zinc oxide arrester on-line monitoring system, wherein, described accumulator is chargeable electrostrictive polymer lithium ion battery.
A kind of Zinc oxide arrester on-line monitoring system of the present invention beneficial effect is compared with prior art:
(1) do not need excavation ground to carry out cable distribution, monitoring system of the present invention completes leakage current sampling at the scene, carries out digital frequency analysis, obtains the real-time waveform data of fundamental current, triple harmonic current data and sampling, and on-the-spot liquid crystal display;
(2) monitoring system of the present invention is by wired or wireless communication modes by data upload host computer, realizes remote monitoring;
(3) monitoring system power supply mode variation of the present invention, wherein utilizes solar panel to charge a battery, and powers to monitoring system of the present invention, can depart from mains supply, avoid the interference from electrical network with accumulator.
Accompanying drawing explanation
Fig. 1 is the theory diagram of a kind of Zinc oxide arrester on-line monitoring system of the present invention;
Fig. 2 is the structured flowchart of a kind of Zinc oxide arrester on-line monitoring system of the present invention.
Embodiment
The present inventor, in order to understand technical scheme of the present invention better, below by specific embodiment, and is described in detail by reference to the accompanying drawings:
Refer to Fig. 1 and Fig. 2, embodiments of the invention, a kind of Zinc oxide arrester on-line monitoring system, comprise core processing circuit 1, liquid crystal display circuit 2, power supply 3, real time clock circuit 4, sample circuit 5 and communicating circuit 6, liquid crystal display circuit 2, power supply 3, real time clock circuit 4, sample circuit 5 are connected with core processing circuit 1 respectively with communicating circuit 6.
Power supply 3 comprises electric power management circuit 31,220V alternating current 32, accumulator 33 and solar panel 34,220V alternating current 32, accumulator 33 are connected with the input end of electric power management circuit 31 respectively with solar panel 34, and the output terminal of electric power management circuit 32 is connected with core processing circuit 1; Power supply 3 provides multiple power sources to originate, and electric power management circuit 31 has handoff functionality, and solar panel 34 can charge for accumulator 33 simultaneously, and accumulator 33 is chargeable electrostrictive polymer lithium ion battery.Power to core processing circuit 1 with accumulator 33, can mains supply be departed from, avoid the interference from electrical network.
Sample circuit 5 comprises Zinc-Oxide Arrester (MOA) 51, protection circuit 52, counting thunder circuit 53, Leakage Current sample circuit 54 and sampling controller 55, Zinc-Oxide Arrester 51 is connected with the input end of protection circuit 52, the input end of counting thunder circuit 53 is connected with the output terminal of protection circuit 11 respectively with the input end of Leakage Current sample circuit 54, the output terminal of counting thunder circuit 53 is connected with the input end of sampling controller 55 respectively with the output terminal of Leakage Current sample circuit 54, the output terminal of sampling controller 55 is connected with the analog to digital conversion interface of core processing circuit 1.Protection circuit 52 instantaneous large-current caused that prevents from being struck by lightning damages the destructiveness of late-class circuit; Counting thunder circuit 53 can count thunderbolt; Leakage current sample circuit 54 can carry out sampling to the leakage current of Zinc-Oxide Arrester 51 and keep; Sampling controller 55 is responsible for switching counting thunder circuit 53 and the connection between leakage current sample circuit 54 and core processing circuit 1.
Communicating circuit 6 comprises wireless module 61, RS485 circuit 62, data acquisition unit 63 and host computer 64, the input end of wireless module 61 is connected with the 1GPIO mouth of core processing circuit respectively with the input end of RS485 circuit 62, data acquisition unit 63 possesses wireless communication interface and RS485 wire communication interface, the output terminal of wireless module 61 is connected with the wireless communication interface of data acquisition unit 63, and the output terminal of RS485 circuit 62 is connected with the RS485 wire communication interface of data acquisition unit 63; Data acquisition unit 63 is connected with host computer 19.Wireless module 61 is the wireless communication line of 20dBm emissive power, ISM (IndustrialScientific Medical) working frequency range, employing FSK (Frequency-shift keying, frequency shift keying) modulation system.Communicating circuit 6 possesses wired and wireless communication mode, and two kinds of patterns are chosen any one kind of them, and wherein RS485 circuit 62 realizes wired data transfer; Wireless module 61 realizes Wireless Data Transmission, and data acquisition unit 63 is collected the related data from core processing circuit 1 of being carried by wireless module 61 and RS485 circuit 62 and uploaded host computer 64.
The principle of work of Zinc oxide arrester on-line monitoring system of the present invention is: power supply 3 is powered for core processing circuit 1; Sample circuit 5 scene completes the sampling of the leakage current data of Zinc-Oxide Arrester 51, and leakage current data is transferred to core processing circuit 1; Core processing circuit 1 pair of leakage current data carries out digital frequency analysis, obtain the real-time waveform data of fundamental current, triple harmonic current data and sampling, and the real-time waveform data of this fundamental current, triple harmonic current data and sampling is transferred to liquid crystal display circuit 2 and communicating circuit 6; The real-time waveform data of the on-the-spot liquid crystal display fundamental current of liquid crystal display circuit 2, triple harmonic current data and sampling; Communicating circuit 6 possesses wired and wireless communication mode, data acquisition unit 63 collect carried by wireless module 61 and RS485 circuit 62 the fundamental current from core processing circuit 1, triple harmonic current data and sampling real-time waveform data and be uploaded to host computer 64.
Zinc oxide arrester on-line monitoring system of the present invention, the leakage current monitoring of MOA be have employed dynamic realtime sampling, record and analyzed, calculate fundametal compoment and the third-harmonic component of leakage current, display leakage current waveform, thus the size of the fundamental current of MOA, the rate of change of current in resistance property can be determined intuitively, and and in conjunction with number of lightning strokes information, can the insulation fault of early detection MOA, and transfer data to host computer by wired or wireless mode, realize real time on-line monitoring.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (6)
1. a Zinc oxide arrester on-line monitoring system, it is characterized in that, comprise core processing circuit, liquid crystal display circuit, power supply, real time clock circuit, sample circuit and communicating circuit, described liquid crystal display circuit, power supply, real time clock circuit, sample circuit and communicating circuit are connected with described core processing circuit respectively, wherein:
Described power supply comprises electric power management circuit, 220V alternating current, accumulator and solar panel, described 220V alternating current, accumulator are connected with the input end of described electric power management circuit respectively with solar panel, and the output terminal of described electric power management circuit is connected with described core processing circuit;
Described sample circuit comprises Zinc-Oxide Arrester, protection circuit, counting thunder circuit, Leakage Current sample circuit and sampling controller, described Zinc-Oxide Arrester is connected with the input end of described protection circuit, the input end of described counting thunder circuit is connected with the output terminal of described protection circuit respectively with the input end of Leakage Current sample circuit, the output terminal of described counting thunder circuit is connected with the input end of described sampling controller respectively with the output terminal of Leakage Current sample circuit, and the output terminal of described sampling controller is connected with described core processing circuit;
Described communicating circuit comprises wireless module, RS485 circuit, data acquisition unit and host computer, the input end of described wireless module is connected with described core processing circuit respectively with the input end of described RS485 circuit, the output terminal of described wireless module is connected with described data acquisition unit respectively with the output terminal of described RS485 circuit, and described data acquisition unit is connected with described host computer.
2. a kind of Zinc oxide arrester on-line monitoring system according to claim 1, is characterized in that, described power supply is that described core processing circuit is powered;
Described sample circuit scene completes the sampling of the leakage current data of described Zinc-Oxide Arrester, and leakage current data is transferred to described core processing circuit;
Described core processing circuit carries out digital frequency analysis to described leakage current data, obtain the real-time waveform data of fundamental current, triple harmonic current data and sampling, and the real-time waveform data of this fundamental current, triple harmonic current data and sampling is transferred to described liquid crystal display circuit and communicating circuit;
The real-time waveform data of fundamental current described in the on-the-spot liquid crystal display of described liquid crystal display circuit, triple harmonic current data and sampling;
The described data acquisition unit of described communicating circuit collects the real-time waveform data by the fundamental current from described core processing circuit of described wireless module and the conveying of RS485 circuit, triple harmonic current data and sampling, and is uploaded to described host computer.
3. a kind of Zinc oxide arrester on-line monitoring system according to claim 1, is characterized in that, described wireless module is the wireless communication line of 20dBm emissive power, ISM working frequency range, employing FSK modulation mode.
4. a kind of Zinc oxide arrester on-line monitoring system according to claim 1, it is characterized in that, described core processing circuit possesses analog to digital conversion interface and GPIO mouth, the output terminal of described sampling controller is connected with the analog to digital conversion interface of described core processing circuit, and the input end of described wireless module is connected with the GPIO mouth of described core processing circuit respectively with the input end of described RS485 circuit.
5. a kind of Zinc oxide arrester on-line monitoring system according to claim 1, it is characterized in that, described data acquisition unit possesses wireless communication interface and RS485 wire communication interface, the output terminal of described wireless module is connected with the wireless communication interface of described data acquisition unit, and the output terminal of described RS485 circuit is connected with the RS485 wire communication interface of described data acquisition unit.
6. a kind of Zinc oxide arrester on-line monitoring system according to claim 1, is characterized in that, described accumulator is chargeable electrostrictive polymer lithium ion battery.
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| CN201510121777.8A CN104655969A (en) | 2015-03-19 | 2015-03-19 | Zinc oxide arrester online monitoring system |
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Cited By (9)
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| CN105954571A (en) * | 2016-07-22 | 2016-09-21 | 安徽亚辉电气自动化有限公司 | Counting system for three-phase combined type overvoltage protector |
| CN106501590A (en) * | 2016-11-03 | 2017-03-15 | 长沙群瑞电子科技有限公司 | A kind of spark gap comprehensive parameters remote monitoring device |
| CN106771535A (en) * | 2016-09-30 | 2017-05-31 | 南京信息工程大学 | A kind of metal oxide arrester leakage current denoising system and denoising method |
| CN109596909A (en) * | 2018-11-12 | 2019-04-09 | 陕西中维电气有限公司 | Intelligent arrester comprehensive monitoring system |
| CN110133394A (en) * | 2019-03-26 | 2019-08-16 | 贵州电网有限责任公司 | Arrester monitors early warning system and its control method on-line |
| CN110596482A (en) * | 2019-07-09 | 2019-12-20 | 国网江苏省电力有限公司徐州供电分公司 | Power transmission line lightning arrester detection system based on inductive power supply and detection method thereof |
| CN111077400A (en) * | 2020-01-08 | 2020-04-28 | 国网福建省电力有限公司 | 10KV zinc oxide arrester fault monitoring device and control method thereof |
| CN111948475A (en) * | 2020-08-06 | 2020-11-17 | 南京力通达电气技术有限公司 | Passive wireless arrester on-line monitoring system |
| CN116699462A (en) * | 2023-07-20 | 2023-09-05 | 常州帕斯菲克自动化技术股份有限公司 | Intelligent monitoring and collecting device for passive zinc oxide lightning arrester |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954571A (en) * | 2016-07-22 | 2016-09-21 | 安徽亚辉电气自动化有限公司 | Counting system for three-phase combined type overvoltage protector |
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| CN110133394A (en) * | 2019-03-26 | 2019-08-16 | 贵州电网有限责任公司 | Arrester monitors early warning system and its control method on-line |
| CN110596482A (en) * | 2019-07-09 | 2019-12-20 | 国网江苏省电力有限公司徐州供电分公司 | Power transmission line lightning arrester detection system based on inductive power supply and detection method thereof |
| CN111077400A (en) * | 2020-01-08 | 2020-04-28 | 国网福建省电力有限公司 | 10KV zinc oxide arrester fault monitoring device and control method thereof |
| CN111948475A (en) * | 2020-08-06 | 2020-11-17 | 南京力通达电气技术有限公司 | Passive wireless arrester on-line monitoring system |
| CN116699462A (en) * | 2023-07-20 | 2023-09-05 | 常州帕斯菲克自动化技术股份有限公司 | Intelligent monitoring and collecting device for passive zinc oxide lightning arrester |
| CN116699462B (en) * | 2023-07-20 | 2023-11-07 | 常州帕斯菲克自动化技术股份有限公司 | Intelligent monitoring and collecting device for passive zinc oxide lightning arrester |
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