CN102798782A - High-voltage insulation resistance monitoring alarm - Google Patents
High-voltage insulation resistance monitoring alarm Download PDFInfo
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- CN102798782A CN102798782A CN2012102875263A CN201210287526A CN102798782A CN 102798782 A CN102798782 A CN 102798782A CN 2012102875263 A CN2012102875263 A CN 2012102875263A CN 201210287526 A CN201210287526 A CN 201210287526A CN 102798782 A CN102798782 A CN 102798782A
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- 238000009413 insulation Methods 0.000 title claims abstract description 33
- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
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- 230000010412 perfusion Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention relates to a high-voltage insulation resistance monitoring alarm. The high-voltage insulation resistance monitoring alarm comprises a central controller, a DC (Direct Current) high-voltage generator connected with the central controller, a high-voltage power resistor with one end per se connected with a high-voltage output end of the DC high-voltage generator, wherein the other end of the high-voltage power resistor is connected with any phase of output bus of tested high-voltage equipment; the shell of the high-voltage insulation resistance monitoring alarm after connected in series with a sampling resistor is systemically connected with the tested high-voltage equipment; the current input end of the sampling resistor is connected with a voltage signal input end of a current sampling and amplifying circuit; the signal output end of the current sampling and amplifying circuit is connected with the central controller; and the central controller calculates out the high-voltage insulation resistance of the tested high-voltage equipment based on the output signals of the current sampling and amplifying circuit. After the test is finished, a discharge control circuit is suitable for discharging residual high voltage on the tested equipment automatically.
Description
Technical field
The present invention relates to the technical field of insulation resistance monitoring, specifically is a kind of high-voltage insulating resistance monitoring alarm instrument.
Background technology
The high-voltage insulating resistance monitoring alarm instrument is exclusively used in the on-line testing of the insulation resistance of high-tension apparatuses such as 10kV/6kV generator, transformer, motor, electric capacitor; High voltage electric equipment is in shape to provide support in order to keep for it, for the repair based on condition of component of equipment provides foundation.
Summary of the invention
The technical matters that the present invention will solve provide a kind of simple in structure, be suitable for realizing high-voltage insulating resistance monitoring alarm instrument to the insulation resistance on-line monitoring of high-tension apparatuses such as 10kV/6kV generator, transformer, motor, electric capacitor.
For solving the problems of the technologies described above; High-voltage insulating resistance monitoring alarm instrument provided by the invention is characterized in comprising: the high-voltage power resistance that central controller, the high voltage direct current generator that links to each other with this central controller, an end link to each other with the high-voltage output end of this high voltage direct current generator; The other end of said high-voltage power resistance links to each other with arbitrary bus of exporting mutually of tested high-tension apparatus; The housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series behind the sampling resistor and systematically the linking to each other of said tested high-tension apparatus; The current input terminal of said sampling resistor links to each other with the voltage signal input end of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit links to each other with said central controller; Said central controller goes out the high-voltage insulating resistance of said tested high-tension apparatus according to the output calculated signals of said current sample amplifying circuit.
Said high voltage direct current generator comprises: be suitable for generating the DC boosting module T7 of the above test voltage of 2500V, the high-voltage diode D11 that links to each other with the output cathode of this DC boosting module T7; The negative electrode of this high-voltage diode D11 links to each other with the output negative pole of said DC boosting module T7 after being connected in series a filter capacitor C50 and filter inductance L3 successively; The effluve end HGND of the node of filter capacitor C50 and filter inductance L3 for linking to each other with a charge/discharge control circuit, the negative electrode of said high-voltage diode D11 and effluve end HGND string are provided with high-power stabilivolt; The negative electrode of said high-voltage diode D11 is the high-voltage output end of said high voltage direct current generator.
Described charge/discharge control circuit comprises: be used to control the systematically break-make of said effluve end HGND and tested high-tension apparatus relay K 4, be used to control the driving circuit of the duty of this relay K 4; This driving circuit comprises an optocoupler U17, and the control end of this optocoupler U17 links to each other with said central controller.
The locking control circuit that said central controller is connected with heating control circuit, data communication interface, switching value input circuit and is used to control the on/off of said tested high-tension apparatus.
The method of work of above-mentioned high-voltage insulating resistance monitoring alarm instrument, it comprises: behind EOT, the said charge/discharge control circuit of said central controller controls is connected discharge loop, with the residual high pressure on the said tested high-tension apparatus of releasing automatically.
Said central controller links to each other with an instrument; When recording insulation resistance decline 20-40%, the instrument early warning; Descend 50% when above, the instrument warning when recording insulation resistance; Said central controller controls one locking control circuit action does not allow said tested high-tension apparatus to put into operation; When early warning occurring or reporting to the police, said central controller is connected the well heater in the said tested high-tension apparatus automatically through heating control circuit, and insulation resistance returns to preset value and promptly stops heating.
The technique effect that the present invention has:
(1) high-voltage insulating resistance monitoring alarm instrument of the present invention; Form by pick-up unit and instrument two parts; Pick-up unit is responsible for measuring and data processing, and measurement result send instrument (control panel that generally adopts touch-screen or supervisory keyboard and display screen to constitute) to show and storage; Can realize all automatic measurement of insulation resistance, measuring period is adjustable; Also manually control survey.
(2) high-voltage insulating resistance monitoring alarm instrument of the present invention has moistureproof heating control function, can when early warning occurring or reporting to the police, connect well heater automatically, and insulation resistance returns to preset value and promptly stops heating; Can be provided with whether drop into well heater when the page is provided with early warning or warning respectively in instrument;
(3) the output cathode end of the DC boosting module in the high-voltage insulating resistance monitoring alarm instrument of the present invention is connected with high-voltage diode; This high-voltage diode is used to prevent that the high pressure on the high-pressure system from getting into pick-up unit; So this pick-up unit can be connected on the high-pressure system for a long time, make the access of pick-up unit can not bring unsafe factor simultaneously to high-pressure system; The system voltage of high-tension apparatus can not cause damage to checkout equipment itself yet;
(4) communication interface of the present invention is used to upload insulating resistance value and coherent signal to Surveillance center; Behind EOT, the charge/discharge control circuit residual high pressure on the equipment under test that is suitable for releasing automatically; High voltage inserts the high-power stabilivolt of 2800V through high-power high voltage resistance current limliting during the charged work of output bus after the step-down, so even the output bus is long charged, also can not have any impact to this device.The instrument that adopts can realize the two-stage warning: early warning representes that insulation resistance descends serious (insulation resistance decline 20-40%), need ascertain the reason; The expression insulation resistance of reporting to the police reaches lower limit (insulation resistance descends more than 50%), does not allow said tested high-tension apparatus to put into operation; When tested resistance during less than the early warning setting value, alarm lamp is bright, and liquid crystal display shows " early warning ", and the prompting insulation resistance descends serious, should be noted that and ascertains the reason; When measured resistance value during less than alarm setting value, alarm lamp is bright, and liquid crystal display shows " warnings ", and alarm relay closed (being locking), and the equipment of not permission at this moment send; Can cancel warning by SR; Cancellation can not be removed closing locking after reporting to the police.The high-power stabilivolt (it has the stabilivolt of a plurality of anti-200V to be in series), filter capacitor and the filter inductance that adopt are suitable for making the ripple content of test voltage to be not more than 1%, have guaranteed the accuracy of monitoring;
(5) combined floodgate control of the present invention: the condition that allows tested high-tension apparatus (like high-tension switch cabinet) to close a floodgate is that " warning " do not appear in the result of last insulation measurement.Before the combined floodgate, press unlock button earlier, the release relay closes is connected the switch closing circuit, allows to close a floodgate; If after last measurement result for reporting to the police, is then pressed unlock button, the release relay will be failure to actuate, do not allow high pressure to close a floodgate;
(6) release relay of the present invention resets: the release relay automatically reset after 1. switch closed a floodgate; 2. by the SR release relay that can reset; 3. the release relay automatically resets when measuring beginning next time; 4. release relay closes automatically reset after 10 minutes.
(7) the present invention forces to close a floodgate when scenario takes place: a, insulation resistance testing result are defective, and instrument is in " warning " state, does not allow to send; But need of work must send electricity, and operating personnel think in the time of can sending electricity through coherence check and judgement; B, detecting instrument break down, can't release, and operating personnel think in the time of can sending electricity through coherence check and judgement; Can turn-off the power source special switch of apparatus preparation, this switch when closing instrument power source, short circuit locking contact, unlocking, the operation of high-voltage switch gear will not receive the control of insulation monitoring and warning device this moment, can close a floodgate;
(8) among the present invention, when the output bus was charged, controller was forbidden Hi-pot test through external connector input judgement.Have only behind breaker open operation and just can do Hi-pot test.The testing circuit of instrument is enclosed in the Stainless Steel Shell, and epoxy perfusion is dustproof, humidity resistance is good, and antijamming capability is strong.
Description of drawings
For content of the present invention is more clearly understood, below basis specific embodiment and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the structured flowchart of high-voltage insulating resistance monitoring alarm instrument of the present invention;
Fig. 2 is the circuit theory diagrams of high voltage direct current generator and charge/discharge control circuit;
Fig. 3 is the circuit theory diagrams of heating control circuit, locking control circuit;
Fig. 4 is the outside primary connection figure of high-voltage insulating resistance monitoring alarm instrument of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated:
Like Fig. 1-4, the high-voltage insulating resistance monitoring alarm instrument of present embodiment comprises: the high-voltage power resistance R ES that central controller, the high voltage direct current generator that links to each other with this central controller, an end link to each other with the high-voltage output end of this high voltage direct current generator; The other end of said high-voltage power resistance links to each other with arbitrary bus of exporting mutually of tested high-tension apparatus; The housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series behind the sampling resistor and systematically the linking to each other of said tested high-tension apparatus; The current input terminal of said sampling resistor links to each other with the voltage signal input end of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit links to each other with said central controller; Said central controller goes out the high-voltage insulating resistance of said tested high-tension apparatus according to the output calculated signals of said current sample amplifying circuit.
Said high voltage direct current generator comprises: be suitable for generating the DC boosting module T7 of the above test voltage of 2500V, the high-voltage diode D11 that links to each other with the output cathode of this DC boosting module T7; The negative electrode of this high-voltage diode D11 links to each other with the output negative pole of said DC boosting module T7 after being connected in series a filter capacitor C50 and filter inductance L3 successively; The effluve end HGND of the node of filter capacitor C50 and filter inductance L3 for linking to each other with a charge/discharge control circuit, the negative electrode of said high-voltage diode D11 and effluve end HGND string are provided with high-power stabilivolt; The negative electrode of said high-voltage diode D11 is the high-voltage output end of said high voltage direct current generator.
Described charge/discharge control circuit comprises: be used to control the systematically break-make of said effluve end HGND and tested high-tension apparatus relay K 4, be used to control the driving circuit of the duty of this relay K 4; This driving circuit comprises an optocoupler U17, and the control end of this optocoupler U17 links to each other with said central controller.
The locking control circuit that said central controller is connected with heating control circuit, data communication interface, switching value input circuit and is used to control the on/off of said tested high-tension apparatus.
Basic functional principle:
High-pressure generating circuit in the pick-up unit produce the 2500V DC voltage put on electrical equipment and systematically between, measuring electrical equipment insulation resistance over the ground.(the comprehensive insulation status of the insulation resistance concentrated expression high voltage electric equipment that arrives of measurement and connected other equipment, cable, parts.）
2. during electric equipment operation, through the auxiliary contact locking pick-up unit of primary cut-out, pick-up unit is not worked.
3. after electrical equipment was out of service, the insulation resistance of the automatic measuring electrical equipment of pick-up unit was judged testing result, was lower than setting value and reported to the police; Instrument will not allow high voltage electric equipment to put into operation after reporting to the police.
4. effective high pressure quarantine measures are taked in pick-up unit inside, guarantee that pick-up unit can not damage because of inserting high pressure, and guarantee can not bring unsafe factor to high-pressure system because of the access of pick-up unit.
The method of work of the high-voltage insulating resistance monitoring alarm instrument of the foregoing description 1, it comprises: behind EOT, the said charge/discharge control circuit of said central controller controls is connected discharge loop, with the residual high pressure on the said tested high-tension apparatus of releasing automatically.
Said central controller links to each other with an instrument; When recording insulation resistance decline 20-40%, the instrument early warning; Descend 50% when above, the instrument warning when recording insulation resistance; Said central controller controls one locking control circuit action does not allow said tested high-tension apparatus to put into operation; When early warning occurring or reporting to the police, said central controller is connected the well heater in the said tested high-tension apparatus automatically through heating control circuit, and insulation resistance returns to preset value and promptly stops heating.
Said central controller links to each other with a display screen; The insulating resistance value that test obtains will be presented on the display screen, and show the time point of measuring;
The storer that links to each other with said central controller can write down 100 measurement results and corresponding Measuring Time, and shows the insulation resistance change trend curve through display screen;
Display screen can show the comprehensive change trend curve of 1000 measurement results, and the insulation status of the said tested high-tension apparatus of comparative analysis.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (6)
1. a high-voltage insulating resistance monitoring alarm instrument is characterized in that comprising: the high-voltage power resistance that central controller, the high voltage direct current generator that links to each other with this central controller, an end link to each other with the high-voltage output end of this high voltage direct current generator;
The other end of said high-voltage power resistance links to each other with arbitrary bus of exporting mutually of tested high-tension apparatus;
The housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series behind the sampling resistor and systematically the linking to each other of said tested high-tension apparatus;
The current input terminal of said sampling resistor links to each other with the voltage signal input end of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit links to each other with said central controller;
Said central controller goes out the high-voltage insulating resistance of said tested high-tension apparatus according to the output calculated signals of said current sample amplifying circuit.
2. high-voltage insulating resistance monitoring alarm instrument according to claim 1 is characterized in that: said high voltage direct current generator comprises: be suitable for generating the DC boosting module (T7) of the above test voltage of 2500V, the high-voltage diode (D11) that links to each other with the output cathode of this DC boosting module (T7); The negative electrode of this high-voltage diode (D11) is connected in series a filter capacitor (C50) successively and links to each other with the output negative pole of said DC boosting module (T7) with filter inductance (L3) back; The effluve end (HGND) of the node of filter capacitor (C50) and filter inductance (L3) for linking to each other with a charge/discharge control circuit, the negative electrode of said high-voltage diode (D11) and effluve end (HGND) string are provided with high-power stabilivolt;
The negative electrode of said high-voltage diode (D11) is the high-voltage output end of said high voltage direct current generator.
3. high-voltage insulating resistance monitoring alarm instrument according to claim 2; It is characterized in that: described charge/discharge control circuit comprises: be used to control said effluve end (HGND) and the systematically break-make of tested high-tension apparatus relay (K4), be used to control the driving circuit of the duty of this relay (K4); This driving circuit comprises an optocoupler (U17), and the control end of this optocoupler (U17) links to each other with said central controller.
4. high-voltage insulating resistance monitoring alarm instrument according to claim 1 is characterized in that: the locking control circuit that said central controller is connected with heating control circuit, data communication interface, switching value input circuit and is used to control the on/off of said tested high-tension apparatus.
5. the method for work of a high-voltage insulating resistance monitoring alarm instrument as claimed in claim 1; It is characterized in that comprising: behind EOT; The said charge/discharge control circuit of said central controller controls is connected discharge loop, with the residual high pressure on the said tested high-tension apparatus of releasing automatically.
6. the method for work of high-voltage insulating resistance monitoring alarm instrument according to claim 5 is characterized in that: said central controller links to each other with an instrument;
When recording insulation resistance decline 20-40%, the instrument early warning; Descend 50% when above, the instrument warning when recording insulation resistance; Said central controller controls one locking control circuit action does not allow said tested high-tension apparatus to put into operation;
When early warning occurring or reporting to the police, said central controller is connected the well heater in the said tested high-tension apparatus automatically through heating control circuit, and insulation resistance returns to preset value and promptly stops heating.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212864.4A CN104833855B (en) | 2012-08-13 | 2012-08-13 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
| CN201510213236.8A CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
| CN201210287526.3A CN102798782B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulation resistance monitoring alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210287526.3A CN102798782B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulation resistance monitoring alarm |
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|---|---|---|---|
| CN201510212864.4A Division CN104833855B (en) | 2012-08-13 | 2012-08-13 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
| CN201510213236.8A Division CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
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| Publication Number | Publication Date |
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| CN102798782A true CN102798782A (en) | 2012-11-28 |
| CN102798782B CN102798782B (en) | 2015-05-20 |
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| CN201510212864.4A Active CN104833855B (en) | 2012-08-13 | 2012-08-13 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
| CN201210287526.3A Active CN102798782B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulation resistance monitoring alarm |
| CN201510213236.8A Active CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
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| CN201510212864.4A Active CN104833855B (en) | 2012-08-13 | 2012-08-13 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
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| CN201510213236.8A Active CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158649A (en) * | 2015-06-03 | 2015-12-16 | 廖小雄 | Motor electrical equipment online insulation state wireless monitoring device |
| CN107356814A (en) * | 2017-06-01 | 2017-11-17 | 意昂神州（北京）科技有限公司 | A kind of insulaion resistance detecting system |
| CN110554237A (en) * | 2018-05-30 | 2019-12-10 | 王建明 | Intelligent test system for insulation resistance of high-voltage motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833855B (en) * | 2012-08-13 | 2017-08-11 | 伍俊 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
| CN105092978A (en) * | 2015-09-17 | 2015-11-25 | 南京民盛电子仪器有限公司 | Online monitoring and offline detection dual-purpose insulation resistance tester |
| CN105676083A (en) * | 2016-01-25 | 2016-06-15 | 上海旷奇科技有限公司 | Online insulation resistance monitoring device and method for power motor |
| CN105807138B (en) * | 2016-03-10 | 2019-03-01 | 南通大学 | The detection method of Vehicular battery group dynamic insulation resistance |
| CN105675997B (en) * | 2016-03-10 | 2019-03-12 | 南通大学 | Vehicular battery group dynamic insulation resistor detecting device |
| CN111257644B (en) * | 2020-04-01 | 2021-05-14 | 南京传积兴自动化科技有限公司 | On-line monitoring circuit and monitoring system for ground insulation resistance of high-voltage power grid |
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- 2012-08-13 CN CN201510212864.4A patent/CN104833855B/en active Active
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- 2012-08-13 CN CN201510213236.8A patent/CN104793058B/en active Active
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| CN2166460Y (en) * | 1993-09-02 | 1994-05-25 | 施亚民 | Computerized high-voltage insulation resistance tester |
| JPH10111334A (en) * | 1996-10-07 | 1998-04-28 | Hakusan Seisakusho:Kk | Dc voltage generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105158649A (en) * | 2015-06-03 | 2015-12-16 | 廖小雄 | Motor electrical equipment online insulation state wireless monitoring device |
| CN105158649B (en) * | 2015-06-03 | 2018-06-19 | 廖小雄 | The online state of insulation wireless monitoring device of electrical equipment and electrical |
| CN107356814A (en) * | 2017-06-01 | 2017-11-17 | 意昂神州（北京）科技有限公司 | A kind of insulaion resistance detecting system |
| CN110554237A (en) * | 2018-05-30 | 2019-12-10 | 王建明 | Intelligent test system for insulation resistance of high-voltage motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104793058B (en) | 2017-06-06 |
| CN102798782B (en) | 2015-05-20 |
| CN104793058A (en) | 2015-07-22 |
| CN104833855B (en) | 2017-08-11 |
| CN104833855A (en) | 2015-08-12 |
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