CN2445334Y - On-line monitoring device for current leakage of lightning protector - Google Patents
On-line monitoring device for current leakage of lightning protector Download PDFInfo
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- CN2445334Y CN2445334Y CN 00221986 CN00221986U CN2445334Y CN 2445334 Y CN2445334 Y CN 2445334Y CN 00221986 CN00221986 CN 00221986 CN 00221986 U CN00221986 U CN 00221986U CN 2445334 Y CN2445334 Y CN 2445334Y
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Abstract
The utility model relates to an on-line monitoring device for leakage current of a lightning protector, comprising a rectification filter circuit, the output end of which is connected to a current / frequency conversion circuit, an output signal of which is input to a signal reception and processing circuit. The utility model has the advantages that the data can be transmitted at long bowls, the detection sensitivity is higher, the artificial error can not be generated, and the performance of the lightning protector can be measured and distinguished. The utility model solves the problems which can not be solved for a long time to people that the lightning protector leakage current signal carries out high voltage isolation, distance transmission and distance monitoring by optical fiber, and leakage exceeds the standard with automatic alarm. The utility model has strong interference resistance and stable performance.
Description
The utility model relates to a kind of monitoring device of leakage current of an arrester, is used for the on-line monitoring lightning arrester.
The performance quality of lightning arrester is directly connected to the safe operation of supply line, in case the change of lightning arrester performance is bad, the explosion caused accident of meeting causes large-area power-cuts.Therefore, in order to detect the performance quality of lightning arrester, method commonly used at present is except annual routine test lightning arrester, also indicates the leakage current of lightning arrester in service with reometer, determines the quality of lightning arrester performance according to the size of current of reometer indication.For example publication number is that " lightning arrester leakance detect and discharge counter " of CN1091835A discloses a kind of operating personnel judge lightning arrester performance quality according to the reading in the reometer device, under the normal condition, the reometer reading is very little, and when the lightning arrester performance becomes bad, the reometer reading increases, counter in this device can also write down the thunderbolt number of times simultaneously, but it can't long-distance transmissions leakage current of an arrester data, therefore be in time to grasp lightning arrester performance quality, the staff need be timed to the reading that reometer is made a copy of at the scene, increase the weight of staff's load to a certain extent, and easily produced personal error; Because the on-the-spot time interval of making an inspection tour needs 24 hours even a week, find that the lightning arrester performance becomes bad instantaneity and also comes with some shortcomings, particularly in unmanned electric substation, if can not long-distance transmissions these need leakage current signals of in time grasping, can't find the accident potential that lightning arrester exists early.
The purpose of this utility model provide a kind of can long-distance transmissions leakage current of an arrester data, higher, the good insulation preformance of detection sensitivity, the leakage current of an arrester on-Line Monitor Device that can not produce personal error and when the lightning arrester performance depreciation, can in time report to the police.
The technical scheme that realizes the utility model purpose is: a kind of leakage current of an arrester on-Line Monitor Device, electric current/the freq converting circuit that include current rectifying and wave filtering circuit, is connected with its output terminal, the output signal of electric current/freq converting circuit is input to signal by optical fiber and receives and treatment circuit.
The signal is far passed circuit that the output terminal of described signal reception and treatment circuit can also be connected to warning circuit and be made of the optocoupler, serial interface circuit and the communication cable that connect successively.
The utlity model has good effect: 1, the leakage current in the lightning arrester is handled by current rectifying and wave filtering circuit, then deliver to electric current/freq converting circuit and convert light frequency output to, being transported to signal by optical fiber at last receives and processing circuit processes, therefore not only can strengthen the anti-interference of long-distance transmissions by optical fiber, and the instant high-voltage in when thunderbolt can be isolated, insulating property are good.2, receive by signal and treatment circuit can directly accurately demonstrate the leakage current of lightning arrester, measure highly sensitively, data can be sent to a distant place, avoided personal error simultaneously.3, demonstration output of the present utility model directly reflects electric current changing value in the lightning arrester, and life period does not exceed standard in case find the leakage current of lightning arrester at interval, can send alerting signal immediately, has eliminated accident potential.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the electrical schematic diagram of the utility model embodiment 1.
Fig. 2 is the electrical schematic diagram of the utility model embodiment 2.
Electric current/freq converting circuit 3 that the utility model shown in Figure 1 includes current rectifying and wave filtering circuit 2, is connected with its output terminal, the output signal of electric current/freq converting circuit 3 is input to signal by optical fiber 4 and receives and treatment circuit 5.When this device used, its input end was leaded up to lightning arrester 1 and is connect high voltage bus, and another road is connected to shunting valve block 8, and shunting valve block 8 is used for big current bypass, plays the effect of this device of protection.
The current rectifying and wave filtering circuit 2 of the utility model embodiment 1 shown in Figure 2 is to be made of bridge rectifier circuit, capacitor C 1 and stabilivolt Z1.It is used for the leakage current of lightning arrester is handled to subsequent conditioning circuit behind overcommutation, overvoltage protection.In order to add up the number of times that lightning arrester is struck by lightning, also be connected to counter 2-1 in this device, counter 2-1 can adopt known counting circuit, be connected between stabilivolt Z1 and the capacitor C 1, be connected on after resistance R 1 and the R2 parallel connection between the contact and common port of capacitor C 1 sum counter 2-1, during thunderbolt lightning arrester 1, thunder-strike current gives capacitor C 1 charging instantaneous by resistance R 1, R2, when thunder-strike current disappeared, C1 was by Z1 sum counter 2-1 discharge, thereby counter 2-1 action once.In order to read the size of leakage current of an arrester in the lightning arrester erecting stage, between the current rectifying and wave filtering circuit 2 of present embodiment and electric current/freq converting circuit 3, also be connected to reometer 2-2, reometer 2-2 can adopt milliammeter.Described electric current/freq converting circuit 3 is the oscillatory circuits that mainly are made of 555 integrated chips and peripheral cell thereof, and the output terminal at 555 integrated chips is connected to luminotron D10, it is used for converting the amplitude of leakage current to frequency, then the frequency that changes is exported by light emitting diode.Optical fiber 4 is used for long-distance transmissions light frequency signal, isolated high voltage and undesired signal.Described signal receives and treatment circuit 5 mainly is made of photoelectricity reception change-over circuit, single-chip microcomputer IC2 and peripheral circuit thereof.Photoelectricity reception change-over circuit converts light signal to electric signal by photoelectric receiving tube D12 and process triode T1 amplification send single chip circuit to handle, the model of single-chip microcomputer can adopt AT89 series, PIC series or ASIC circuit or the like, its peripheral circuit is common keyboard interface circuit K1, K2, K3, and display interface circuit, display interface circuit among this embodiment is formed by connecting by interface chip IC1 and display, also can adopt display directly to link to each other with single-chip microcomputer, wherein the IC1 model that can adopt is 9607.Signal receives and treatment circuit 5 is used for leakage current of an arrester is handled, and demonstrates the size of leakage current.
Present embodiment also is connected to the warning circuit 7 that is connected with single-chip microcomputer IC3, described warning circuit 7 is in series by relay J and triode T3, relay normally open contact can be connected with commercially available conventional alarm 7-1, by being solidificated in the program in the single-chip microcomputer, when leakage current of an arrester reaches setting value, the relay J adhesive, alarm 7-1 reports to the police.The output of single-chip microcomputer can also be connected to optocoupler O1, O2, the O3 that connects by successively, the signal is far passed circuit 6 that serial interface circuit and cable constitute, described serial interface circuit mainly is made of communication interface integrated chip IC3, by IC3 RS485 or the RS232 signal that signal changes into standard is transferred to peripheral hardware, wherein the model of IC3 can adopt 75LBC184 or MAX232; It is used for being connected with the electric substation existing measuring instrument of duty room, has realized long-distance transmissions, thereby makes the staff in indoor size that can the at-once monitor leakage current of an arrester.
The concrete principle of work of present embodiment is as follows: because lightning arrester 1 can equivalence be that an electric capacity is in parallel with a high resistance measurement device, the electric current that flows through resistance under the normal condition is minimum, and leakage current of an arrester mainly is a capacitance current.When in a single day lightning arrester insulated variation, resistance value reduced, and the current in resistance property that flows through on the resistance will increase greatly, caused lightning arrester temperature rise heating, as untimely out of service, will cause the generation of explosion accident.Under the normal condition, be that the leakage current of an arrester of principal ingredient is through rectification circuit etc. with the capacitance current, deliver to electric current/freq converting circuit 3, the leakage current that changes is converted to the light frequency of variation, through optical fiber 4 long-distance transmissions, receive and conversion through photoelectric receiving diode, signal being sent into single-chip microcomputer handles again, thereby the size that shows leakage current of an arrester, by light-coupled isolation corresponding signal is sent to the duty room measuring instrument with serial mode simultaneously, exceed standard in case leak, warning circuit in time sends alerting signal, thereby reach of the present utility model can be with the leakage current long-distance transmissions, realize highly sensitive automatic detection, exceed standard and report to the police automatically, measure and differentiate the purpose of lightning arrester performance quality immediately.
The basic structure of embodiment 2 shown in Figure 3 is similar with embodiment 1, different is: electric current/freq converting circuit 3 is the oscillatory circuits that mainly are made of triode T4, T5 and comparer IC4, and the collector output of triode T5 is connected to luminotron D13, and concrete principle of work is with embodiment 1.Electric current/freq converting circuit 3 of the present utility model can also adopt the oscillatory circuit that is made of other discrete component.
Claims (5)
1, a kind of leakage current of an arrester on-Line Monitor Device, include current rectifying and wave filtering circuit (2), it is characterized in that: the output terminal at current rectifying and wave filtering circuit (2) is connected to electric current/freq converting circuit (3), and the output signal of electric current/freq converting circuit (3) is input to signal by optical fiber (4) and receives and treatment circuit (5).
2, leakage current of an arrester on-Line Monitor Device according to claim 1, it is characterized in that: described electric current/freq converting circuit (3) is the oscillatory circuit that mainly contains 555 integrated chips and peripheral cell formation thereof, and is connected to luminotron D10 at the output terminal of 555 integrated chips.
3, leakage current of an arrester on-Line Monitor Device according to claim 1, it is characterized in that: described electric current/freq converting circuit (3) is the oscillatory circuit that mainly is made of triode T4, T5 and comparer IC4, and the collector output of triode T5 is connected to luminotron D13.
4, leakage current of an arrester on-Line Monitor Device according to claim 1 is characterized in that: described signal receives and treatment circuit (5) mainly contains photoelectric receiving tube D12, single-chip microcomputer IC2 and peripheral circuit constitutes.
5, leakage current of an arrester on-Line Monitor Device according to claim 1 is characterized in that: at the signal is far passed circuit (6) that signal receives and the output terminal of treatment circuit (5) is connected to warning circuit (7) and is made of the optocoupler, serial interface circuit and the communication cable that connect successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221986 CN2445334Y (en) | 2000-09-29 | 2000-09-29 | On-line monitoring device for current leakage of lightning protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221986 CN2445334Y (en) | 2000-09-29 | 2000-09-29 | On-line monitoring device for current leakage of lightning protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2445334Y true CN2445334Y (en) | 2001-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00221986 Expired - Fee Related CN2445334Y (en) | 2000-09-29 | 2000-09-29 | On-line monitoring device for current leakage of lightning protector |
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| CN (1) | CN2445334Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508094A (en) * | 2011-10-18 | 2012-06-20 | 南京信息职业技术学院 | Lightning arrester leakage current sensor |
| CN102624092A (en) * | 2012-04-01 | 2012-08-01 | 河南省电力公司驻马店供电公司 | Leakage current abnormal remote alarm device for lightning arrester of distribution transformer station zone |
| CN103760412A (en) * | 2014-01-17 | 2014-04-30 | 西安理工大学 | Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester |
| CN104007354A (en) * | 2013-02-27 | 2014-08-27 | 上海宝钢工业技术服务有限公司 | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable |
| CN105425121A (en) * | 2015-11-13 | 2016-03-23 | 国网山东省电力公司德州供电公司 | Insulating material breakdown detection alarm circuit based on optical coupler |
-
2000
- 2000-09-29 CN CN 00221986 patent/CN2445334Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508094A (en) * | 2011-10-18 | 2012-06-20 | 南京信息职业技术学院 | Lightning arrester leakage current sensor |
| CN102624092A (en) * | 2012-04-01 | 2012-08-01 | 河南省电力公司驻马店供电公司 | Leakage current abnormal remote alarm device for lightning arrester of distribution transformer station zone |
| CN104007354A (en) * | 2013-02-27 | 2014-08-27 | 上海宝钢工业技术服务有限公司 | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable |
| CN104007354B (en) * | 2013-02-27 | 2018-07-20 | 上海宝钢工业技术服务有限公司 | The total group test circuit and method of 10kV Zinc-Oxide Arresters and cable |
| CN103760412A (en) * | 2014-01-17 | 2014-04-30 | 西安理工大学 | Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester |
| CN105425121A (en) * | 2015-11-13 | 2016-03-23 | 国网山东省电力公司德州供电公司 | Insulating material breakdown detection alarm circuit based on optical coupler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |