CN106646058A - Online monitoring system for lightning arrester - Google Patents
Online monitoring system for lightning arrester Download PDFInfo
- Publication number
- CN106646058A CN106646058A CN201611244898.2A CN201611244898A CN106646058A CN 106646058 A CN106646058 A CN 106646058A CN 201611244898 A CN201611244898 A CN 201611244898A CN 106646058 A CN106646058 A CN 106646058A
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- China
- Prior art keywords
- digital signal
- current
- signal processor
- arrester
- gsm
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention relates to the technical field of monitoring devices, and specifically relates to an online monitoring system for a lightning arrester. The system mainly consists of a control center and a plurality of subsystems. Each subsystem comprises a signal collection module, a 485 communication module, a digital signal processor, and a GSM transmitting module. The control center comprises a GSM receiving module, a first digital signal processor, a PC host, an alarm module, and a display. A DSP is employed for directly carrying out the calculation and analysis of signals collected by the subsystems, thereby greatly reducing the information transmission amount, reducing the error rate, and guaranteeing the information accuracy. The system employs a mode of long-distance GSM antenna communication and short-distance 485 wired communication combination, and reduces the cost.
Description
Technical field
The present invention relates to monitoring device technical field, and in particular to a kind of arrester on-line detecting system.
Background technology
Arrester is a kind of important overvoltage protection.Because it has the overvoltage response speed that is exceedingly fast and good
The fields such as good pressure-limiting function, the power system that is widely used, petroleum system, the railway system.
Aging, deterioration will occur under the core parts znr long-time of arrester is in running order
Phenomenon, in addition the factor such as the transient state of electric power system, resonance overvoltage impact, arrester internal wetted will also accelerate this process.
Once generation is aging, degradation phenomena, the leakage current for flowing through arrester will constantly raise and ultimately result in thermal runaway.In thermal runaway
Arrester under state easily burns and explodes, and will directly influence the safe operation of whole system.
At present for the detection of arrester is generally by manually carrying out regularly preventive test.Due to arrester Numerous
And dispersion is installed, such detection needs to consume substantial amounts of human and material resources, the preventive test of another aspect arrester need be
System power-off is carried out, and has had a strong impact on the stable operation of system.
For detecting mostly by the problem for manually carrying out periodic detection to arrester at present, it is also proposed both at home and abroad various
Corresponding scheme, but all it is directly by the information transfer of collection to process either using wire communication or radio communication
Center, information content is too big, and error rate is high.Because wire communication needs a large amount of transmission lines, radio communication to need substantial amounts of wireless biography
Sensor, cost is all very high.
The content of the invention
It is an object of the invention to overcome of the prior art not enough and provide a kind of keeping away based on the Internet of Things communication technology
Thunder device on-line monitoring system, the Internet of Things communication technology adopts global system for mobile communications communication mode, on-line monitoring to adopt and be based on
The harmonic analysis method of digital signal processor.
The object of the present invention is achieved like this：
A kind of arrester on-line monitoring system, is mainly made up of, each described subsystem control centre and several subsystems
Including signal acquisition module, 485 communication modules, digital signal processor and GSM sending modules, described signal acquisition module by
Acquisition module 1, acquisition module 2.... acquisition module N parallels, described signal acquisition module is connected with 485 communication modules, described
485 communication modules be connected with digital signal processor, described digital signal processor is connected with GSM sending modules；
Described control centre includes GSM receiver modules, digital signal processor one, PC main frames, alarm module, display, institute
Several GSM sending modules communication connections of the GSM receiver modules stated and several subsystems, described GSM receiver modules with
Digital signal processor one connects, and described digital signal processor one is connected with PC main frames, described alarm module, display
Also it is connected with PC main-machine communications.
Based on the above, described signal acquisition module is made up of current sample part and voltage sample part, described
Current sample part by current transformer gather arrester Leakage Current, use transient state in the output end of current transformer
Diode is suppressed to block lightning current signals, described voltage sample part gathers the work electricity of arrester by AC potentiometer
Pressure；
The voltage of collection and current signal transfer to digital signal processor, digital signal processor are carried out in quick Fu to it
Leaf transformation, frequency domain is transformed into by voltage and current signal from time domain, obtains 3 subharmonic phase angles of voltage, the subharmonic of electric current 3
Phase angle, the triple-frequency harmonics peak value of electric current.By following formula calculate current in resistance property triple-frequency harmonics virtual value：
On the other hand, the leakage current signal of collection is integrated by DSP, obtains its virtual value.
DSP is analyzed the current in resistance property triple-frequency harmonics virtual value obtained after computing and circuital virtual value, then
The working condition of arrester is judged, and result is sent into control centre by GSM sending modules.
Based on the above, described control centre also includes a printer and keyboard, and described printer and keyboard is equal
It is connected with PC main-machine communications.
Based on the above, 485 described communication modules increase the method for relaying in transmitting procedure and signal are put
Greatly, eight relayings are most added.
The present invention has the advantage that：
Patent of the present invention proposes a kind of scheme, using digital signal processor the collection signal that Jing 485 transmit is carried out calculating and
Analysis, control centre is transferred to by analysis result by the Internet of Things communication technology, and control centre notifies dimension according to the information for receiving
Shield personnel are checked corresponding arrester and are rationally processed.Patent of the present invention not only realizes the on-line monitoring of arrester, protects
The safe operation of system is hindered, has reduced the maintenance cost of system, simultaneously because subsystem signal directly using DSP to collection
Processed, substantially reduced the information content of transmission, reduced error rate, it is ensured that the accuracy of information.
The signal gathered using DSP sub-systems is directly calculated and analyzed, and substantially reduces the transmission quantity of information, is dropped
Low error rate, it is ensured that information accuracy.
By the way of the communication of remote gsm wireless and in-plant 485 wire communication combine, system is reduced
Cost.
Description of the drawings
Fig. 1 is the system construction drawing of the present invention.
Fig. 2 is signal acquisition circuit structure chart.
Fig. 3 is digital signal processor and gsm communication interface circuit attachment structure figure.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
As shown in Figure 1, 2, 3, a kind of arrester on-line monitoring system, mainly by control centre and several subsystem structures
Into, each described subsystem includes signal acquisition module, 485 communication modules, digital signal processor and GSM sending modules,
Described signal acquisition module by acquisition module 1, acquisition module 2.... acquisition module N parallels, described signal acquisition module with
485 communication modules connect, and 485 described communication modules are connected with digital signal processor, described digital signal processor and
GSM sending modules connect；
Described control centre includes GSM receiver modules, digital signal processor one, PC main frames, alarm module, display, institute
Several GSM sending modules communication connections of the GSM receiver modules stated and several subsystems, described GSM receiver modules with
Digital signal processor one connects, and described digital signal processor one is connected with PC main frames, described alarm module, display
Also it is connected with PC main-machine communications.
Based on the above, described signal acquisition module is made up of current sample part and voltage sample part, described
Current sample part by current transformer gather arrester Leakage Current, use transient state in the output end of current transformer
Diode is suppressed to block lightning current signals, described voltage sample part gathers the work electricity of arrester by AC potentiometer
Pressure；
The voltage of collection and current signal transfer to digital signal processor, digital signal processor are carried out in quick Fu to it
Leaf transformation, frequency domain is transformed into by voltage and current signal from time domain, obtains 3 subharmonic phase angles of voltage, the subharmonic of electric current 3
Phase angle, the triple-frequency harmonics peak value of electric current.By following formula calculate current in resistance property triple-frequency harmonics virtual value：
On the other hand, the leakage current signal of collection is integrated by DSP, obtains its virtual value.
DSP is analyzed the current in resistance property triple-frequency harmonics virtual value obtained after computing and circuital virtual value, then
The working condition of arrester is judged, and result is sent into control centre by GSM sending modules.
Based on the above, described control centre also includes a printer and keyboard, and described printer and keyboard is equal
It is connected with PC main-machine communications.
Based on the above, 485 described communication modules increase the method for relaying in transmitting procedure and signal are put
Greatly, eight relayings are most added.
Under the effect of long-term work voltage, the resistive component in Leakage Current is to cause arrester aging, deterioration main
Factor, is characterized in that caused nonlinear resistance the degree of heat increases because current in resistance property causes power attenuation.It is domestic at present
Outer newest research shows that current in resistance property third-harmonic component can be old as arrester as the fundametal compoment of current in resistance property
The index changed, deteriorate, and the change of current in resistance property triple-frequency harmonics is also more obvious than fundamental wave when arrester occurs aging, therefore
The third-harmonic component of current in resistance property is more suitable for aging, deterioration for monitoring arrester.In the triple-frequency harmonics of monitoring arrester
While component, also tackle its leakage current virtual value and be monitored, further to judge aging, the degradation of arrester.
Using current transformer and AC potentiometer the leakage current and operating voltage of arrester are measured respectively.For
Impact when preventing lightning current from flowing through arrester to gathered data, in the output end of current transformer Transient Suppression Diode is used
（TVS）Block lightning current signals.
The voltage of collection and current signal transfer to digital signal processor, digital signal processor are carried out quickly to it
Fourier transformation, frequency domain is transformed into by voltage and current signal from time domain, obtains 3 subharmonic phase angles of voltage, electric current 3 times is humorous
The phase angle of ripple, the triple-frequency harmonics peak value of electric current.By following formula calculate current in resistance property triple-frequency harmonics virtual value：
On the other hand, the leakage current signal of collection is integrated by DSP, obtains its virtual value, as shown in table 1.
Digital signal processor enters the current in resistance property triple-frequency harmonics virtual value obtained after computing and circuital virtual value
Row analysis, then judges the working condition of arrester according to following table, and result is sent in control by gsm communication
The heart.
| The effective value stabilization of total current | Total current virtual value increases | |
| The effective value stabilization of triple-frequency harmonics | Normal work. | Arrester is moist or there is spot on surface. |
| Triple-frequency harmonics virtual value increases | Arrester is slightly aging | 1 arrester is highly aging；2 system voltages are too high. |
The subsystem of the design（One building, transformer station, power plant etc.）Communicate using 485, in theory RS485
Most longer transmission distance can reach 1200 meters, but the distance transmitted in actual applications is shorter than 1200 meters, specifically can transmit many
Depending on long sight surrounding environment.The method for increasing relaying can be adopted in transmitting procedure to be amplified signal, at most can be added
Eight relayings, that is to say, that in theory the maximum transmission distance of RS485 can reach 9.6 kilometers, and subsystem can be met completely
The needs of signal transmission.
As shown in figure 3, due to subsystems it is distant, it is relatively costly using wire communication, thus the system adopt
Gsm communication technology realizes signal transmission.Gsm communication technology is a kind of the more commonly used Internet of Things communication technology, and gsm communication has
Flexibly, convenient networking structure, frequency high recycling rate, capacity is big, and the needs of information can be met completely.There is provided open
Interface, can interconnect with various public networks, and the gsm communication system that any producer provides can be interconnected, it is ensured that install
It is convenient.By authentication, encryption and temporarily moved subscriber identification number (TMSI), it is ensured that the security of information transfer.
Claims (4)
1. a kind of arrester on-line monitoring system, it is characterised in that：It is main to be made up of control centre and several subsystems, it is described
Each subsystem include signal acquisition module, 485 communication modules, digital signal processor and GSM sending modules, described letter
, by acquisition module 1, acquisition module 2.... acquisition module N parallels, described signal acquisition module communicates with 485 for number acquisition module
Module connects, and 485 described communication modules are connected with digital signal processor, and described digital signal processor sends with GSM
Module connects；
Described control centre includes GSM receiver modules, digital signal processor one, PC main frames, alarm module, display, institute
Several GSM sending modules communication connections of the GSM receiver modules stated and several subsystems, described GSM receiver modules with
Digital signal processor one connects, and described digital signal processor one is connected with PC main frames, described alarm module, display
Also it is connected with PC main-machine communications.
2. a kind of arrester on-line monitoring system according to claim 1, it is characterised in that：Described signal acquisition module
It is made up of current sample part and voltage sample part, described current sample part gathers arrester by current transformer
Leakage Current, lightning current signals, described voltage sample are blocked in the output end of current transformer using Transient Suppression Diode
Part gathers the operating voltage of arrester by AC potentiometer；
The voltage of collection and current signal transfer to digital signal processor, digital signal processor are carried out in quick Fu to it
Leaf transformation, frequency domain is transformed into by voltage and current signal from time domain, obtains 3 subharmonic phase angles of voltage, the subharmonic of electric current 3
Phase angle, the triple-frequency harmonics peak value of electric current,
By following formula calculate current in resistance property triple-frequency harmonics virtual value：
On the other hand, the leakage current signal of collection is integrated by digital signal processor, obtains its virtual value；
Digital signal processor carries out the current in resistance property triple-frequency harmonics virtual value obtained after computing and circuital virtual value point
Analysis, then judges the working condition of arrester, and result is sent into control centre by GSM sending modules.
3. a kind of arrester on-line monitoring system according to claim 1, it is characterised in that：Described control centre also wraps
A printer and keyboard are included, described printer and keyboard is connected with PC main-machine communications.
4. a kind of arrester on-line monitoring system according to claim 1, it is characterised in that：485 described communication modules
The method for increasing relaying in transmitting procedure is amplified to signal, most adds eight relayings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244898.2A CN106646058A (en) | 2016-12-29 | 2016-12-29 | Online monitoring system for lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244898.2A CN106646058A (en) | 2016-12-29 | 2016-12-29 | Online monitoring system for lightning arrester |
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| CN106646058A true CN106646058A (en) | 2017-05-10 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611244898.2A Pending CN106646058A (en) | 2016-12-29 | 2016-12-29 | Online monitoring system for lightning arrester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459228A (en) * | 2018-01-11 | 2018-08-28 | 东南大学 | A kind of 10KV metal oxide arresters line detection system for failure and method |
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|---|---|---|---|---|
| CN201111702Y (en) * | 2007-10-12 | 2008-09-10 | 南京德闰电气有限公司 | Arrester leakage current telemetering device |
| CN202305704U (en) * | 2011-10-27 | 2012-07-04 | 云南电网公司昆明供电局 | Running state monitoring device of zinc oxide arrester |
| CN202330598U (en) * | 2011-12-01 | 2012-07-11 | 浙江省电力公司台州电业局 | Long-distance monitoring system for transformer substation arrester |
| CN205484512U (en) * | 2016-03-23 | 2016-08-17 | 江苏新亚高电压测试设备有限公司 | Arrester leaks current sample device |
| CN205539234U (en) * | 2016-01-22 | 2016-08-31 | 常州埃依琦科技有限公司 | Arrester performance monitoring system |
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2016
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Patent Citations (5)
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| CN201111702Y (en) * | 2007-10-12 | 2008-09-10 | 南京德闰电气有限公司 | Arrester leakage current telemetering device |
| CN202305704U (en) * | 2011-10-27 | 2012-07-04 | 云南电网公司昆明供电局 | Running state monitoring device of zinc oxide arrester |
| CN202330598U (en) * | 2011-12-01 | 2012-07-11 | 浙江省电力公司台州电业局 | Long-distance monitoring system for transformer substation arrester |
| CN205539234U (en) * | 2016-01-22 | 2016-08-31 | 常州埃依琦科技有限公司 | Arrester performance monitoring system |
| CN205484512U (en) * | 2016-03-23 | 2016-08-17 | 江苏新亚高电压测试设备有限公司 | Arrester leaks current sample device |
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| CN108459228A (en) * | 2018-01-11 | 2018-08-28 | 东南大学 | A kind of 10KV metal oxide arresters line detection system for failure and method |
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Application publication date: 20170510 |