CN102798782B - High-voltage insulation resistance monitoring alarm - Google Patents
High-voltage insulation resistance monitoring alarm Download PDFInfo
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- CN102798782B CN102798782B CN201210287526.3A CN201210287526A CN102798782B CN 102798782 B CN102798782 B CN 102798782B CN 201210287526 A CN201210287526 A CN 201210287526A CN 102798782 B CN102798782 B CN 102798782B
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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 a kind of high-voltage insulating resistance monitoring alarm instrument.
Background technology
High-voltage insulating resistance monitoring alarm instrument is exclusively used in the on-line testing of the insulation resistance of the high-tension apparatuses such as 10kV/6kV generator, transformer, motor, electric capacitor, in order to keep, high voltage electric equipment is in shape to provide support, for the repair based on condition of component of equipment provides foundation for it.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of structure simple, be suitable for realizing the high-voltage insulating resistance monitoring alarm instrument to the insulation resistance on-line monitoring of the 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 be connected with this central controller, one end are connected with the high-voltage output end of this high voltage direct current generator; The other end of described high-voltage power resistance exports bus mutually with the arbitrary of tested high-tension apparatus and is connected; With being systematically connected of described tested high-tension apparatus after the housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series a sampling resistor; The current input terminal of described sampling resistor is connected with the voltage signal inputs of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit is connected with described central controller; Described central controller calculates the high-voltage insulating resistance of described tested high-tension apparatus according to the output signal of described current sample amplifying circuit.
Described high voltage direct current generator comprises: the DC boosting module T7 being suitable for the test voltage generating more than 2500V, the high-voltage diode D11 be connected 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 is connected with the output negative pole of described DC boosting module T7 with after filter inductance L3, filter capacitor C50 and the node of filter inductance L3 are go here and there between the negative electrode of the effluve end HGND be connected with a charge/discharge control circuit, described high-voltage diode D11 and effluve end HGND to be provided with high-power voltage-stabilizing tube; The negative electrode of described high-voltage diode D11 is the high-voltage output end of described high voltage direct current generator.
Described charge/discharge control circuit comprises: for control the systematically break-make of described effluve end HGND and tested high-tension apparatus relay K 4, for controlling 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 is connected with described central controller.
Described central controller is connected with heating control circuit, data communication interface, switching value input circuit and the locking control circuit for the on/off that controls described tested high-tension apparatus.
The method of work of above-mentioned high-voltage insulating resistance monitoring alarm instrument, it comprises: after test terminates, and charge/discharge control circuit described in described central controller controls connects discharge loop, with the residual high pressure of automatically releasing on described tested high-tension apparatus.
Described central controller is connected with an instrument; When recording insulation resistance decline 20-40%, instrument early warning;
When recording insulation resistance decline more than 50%, instrument is reported to the police; The action of described central controller controls one locking control circuit, does not allow described tested high-tension apparatus to put into operation; When occurring early warning or reporting to the police, described central controller connects the well heater in described tested high-tension apparatus automatically by heating control circuit, and insulation resistance returns to preset value and namely stops heating.
The technique effect that the present invention has:
(1) high-voltage insulating resistance monitoring alarm instrument of the present invention, be made up of pick-up unit and instrument two parts, pick-up unit is responsible for measuring and data processing, and measurement result send instrument (the general touch-screen or supervisory keyboard and display screen of adopting combines the control panel formed) show and store; Can realize all automatic measurement of insulation resistance, measuring period is adjustable; Also can measure by Non-follow control.
(2) high-voltage insulating resistance monitoring alarm instrument of the present invention has moistureproof computer heating control function, automatically can connect well heater when occurring early warning or reporting to the police, and insulation resistance returns to preset value and namely stops heating; Can arrange when the page arranges early warning respectively or reports to the police whether drop into well heater in instrument;
(3) the output cathode end of the DC boosting module in high-voltage insulating resistance monitoring alarm instrument of the present invention is connected with high-voltage diode, this high-voltage diode enters pick-up unit for preventing the high pressure in high-pressure system, so make this pick-up unit be connected in high-pressure system for a long time, make the access of pick-up unit can not bring unsafe factor to high-pressure system simultaneously; The system voltage of high-tension apparatus also can not cause damage to checkout equipment itself;
(4) communication interface of the present invention is used for uploading insulating resistance value and coherent signal to Surveillance center; After test terminates, charge/discharge control circuit is suitable for the residual high pressure of automatically releasing on equipment under test; During output bus live line work, high voltage is by high-power high voltage resistance current limliting, accesses 2800V high-power voltage-stabilizing tube after step-down, even if so output bus is long charged, also can not have any impact to this device.The instrument adopted can realize two-stage and report to the police: early warning represents that insulation resistance declines serious (insulation resistance decline 20-40%), need ascertain the reason; Report to the police and represent that insulation resistance reaches lower limit (insulation resistance declines more than 50%), do not allow described tested high-tension apparatus to put into operation; When tested resistance is less than early warning setting value, alarm lamp is bright, liquid crystal display display " early warning ", and prompting insulation resistance declines serious, should be noted that and ascertain the reason; When measured resistance value is less than alarm setting value, alarm lamp is bright, liquid crystal display display " warning ", and alarm relay closed (i.e. locking), now do not allow equipment power transmission; Warning can be cancelled by reset button; Cancel after reporting to the police, can not closing locking be removed.The high-power voltage-stabilizing tube (it has the stabilivolt of multiple resistance to 200V to be in series) adopted, filter capacitor and filter inductance are suitable for making the ripple content of test voltage to be not more than 1%, ensure that the accuracy of monitoring;
(5) shutting-brake control of the present invention: the condition allowing tested high-tension apparatus (as high-tension switch cabinet) to close a floodgate is that the result of last insulation measurement does not occur " warning ".Before combined floodgate, first press unlock button, unlock relay closes, turn on-switch closing circuit, allow to close a floodgate; If last measurement result is for reporting to the police, then after pressing unlock button, unlocking relay will be failure to actuate, and not allow high pressure to close a floodgate;
(6) unblock relay of the present invention resets: 1. unlock relay after switch combined floodgate and automatically reset; 2. can to reset unblock relay by reset button; 3. automatically reset when upper once measurement beginning unblock relay; 4. unlock relay closes to automatically reset after 10 minutes.
(7) the present invention forces when there is following situations to close a floodgate: a, insulation resistance testing result are defective, and state that instrument is in " warning ", does not allow power transmission; But need of work must power transmission, and operating personnel think through coherence check and judgement can power transmission; B, detecting instrument break down, and cannot unlock, and operating personnel think through coherence check and judgement can power transmission; The power source special switch of apparatus preparation can be turned off, this switch while closedown instrument power source, short circuit locking contact, unlocking, now the operation of high-voltage switch gear is not by by the control of insulation monitoring and warning device, can close a floodgate;
(8) in the present invention, when exporting bus and being charged, controller forbids Hi-pot test by external connector input judgement.Only have when just doing Hi-pot test after breaker open operation.The testing circuit of instrument is enclosed in Stainless Steel Shell, and epoxy pours into, dust-proof, humidity resistance good, and antijamming capability is strong.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is 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 drawings and Examples, the present invention is described in detail:
Embodiment 1
As Fig. 1-4, the high-voltage insulating resistance monitoring alarm instrument of the present embodiment comprises: the high-voltage power resistance RES that central controller, the high voltage direct current generator be connected with this central controller, one end are connected with the high-voltage output end of this high voltage direct current generator; The other end of described high-voltage power resistance exports bus mutually with the arbitrary of tested high-tension apparatus and is connected; With being systematically connected of described tested high-tension apparatus after the housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series a sampling resistor; The current input terminal of described sampling resistor is connected with the voltage signal inputs of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit is connected with described central controller; Described central controller calculates the high-voltage insulating resistance of described tested high-tension apparatus according to the output signal of described current sample amplifying circuit.
Described high voltage direct current generator comprises: the DC boosting module T7 being suitable for the test voltage generating more than 2500V, the high-voltage diode D11 be connected 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 is connected with the output negative pole of described DC boosting module T7 with after filter inductance L3, filter capacitor C50 and the node of filter inductance L3 are go here and there between the negative electrode of the effluve end HGND be connected with a charge/discharge control circuit, described high-voltage diode D11 and effluve end HGND to be provided with high-power voltage-stabilizing tube; The negative electrode of described high-voltage diode D11 is the high-voltage output end of described high voltage direct current generator.
Described charge/discharge control circuit comprises: for control the systematically break-make of described effluve end HGND and tested high-tension apparatus relay K 4, for controlling 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 is connected with described central controller.
Described central controller is connected with heating control circuit, data communication interface, switching value input circuit and the locking control circuit for the on/off that controls described tested high-tension apparatus.
Basic functional principle:
1. high-pressure generating circuit in pick-up unit produce 2500V DC voltage put on electrical equipment and systematically between, measure electrical equipment insulation resistance over the ground.(the comprehensive insulation status of the insulation resistance concentrated expression high voltage electric equipment arrived of measurement and other equipment connected, cable, parts.）
2., during electric equipment operation, by the auxiliary contact locking pick-up unit of primary cut-out, pick-up unit does not work.
3. after electrical equipment is out of service, pick-up unit measures the insulation resistance of electrical equipment automatically, judges testing result, reports to the police lower than setting value; After instrument alarm, high voltage electric equipment will not be allowed to put into operation.
4. effective high_voltage isolation measure is taked in pick-up unit inside, ensures that pick-up unit can not damage because of access high pressure, and ensures to bring unsafe factor because of the access of pick-up unit to high-pressure system.
Embodiment 2
The method of work of the high-voltage insulating resistance monitoring alarm instrument of above-described embodiment 1, it comprises: after test terminates, and charge/discharge control circuit described in described central controller controls connects discharge loop, with the residual high pressure of automatically releasing on described tested high-tension apparatus.
Described central controller is connected with an instrument; When recording insulation resistance decline 20-40%, instrument early warning;
When recording insulation resistance decline more than 50%, instrument is reported to the police; The action of described central controller controls one locking control circuit, does not allow described tested high-tension apparatus to put into operation; When occurring early warning or reporting to the police, described central controller connects the well heater in described tested high-tension apparatus automatically by heating control circuit, and insulation resistance returns to preset value and namely stops heating.
Described central controller is connected with a display screen; Test the insulating resistance value obtained will show on a display screen, and the time point of display measurement;
100 measurement results and corresponding Measuring Time can be recorded to the storer that described central controller is connected, and by display screen display insulation resistance change trend curve;
Display screen can show the comprehensive change trend curve of 1000 measurement results, and the insulation status of tested high-tension apparatus described in comparative analysis.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (4)
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 be connected with this central controller, one end are connected with the high-voltage output end of this high voltage direct current generator;
The other end of described high-voltage power resistance exports bus mutually with the arbitrary of tested high-tension apparatus and is connected;
With being systematically connected of described tested high-tension apparatus after the housing of this high-voltage insulating resistance monitoring alarm instrument is connected in series a sampling resistor;
The current input terminal of described sampling resistor is connected with the voltage signal inputs of a current sample amplifying circuit, and the signal output part of this current sample amplifying circuit is connected with described central controller;
Described central controller calculates the high-voltage insulating resistance of described tested high-tension apparatus according to the DC voltage that the output signal of described current sample amplifying circuit and described high voltage direct current generator produce;
Described high voltage direct current generator comprises: the DC boosting module (T7) being suitable for the test voltage generating more than 2500V, the high-voltage diode (D11) be connected 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 is connected with the output negative pole of described DC boosting module (T7) afterwards with filter inductance (L3), filter capacitor (C50) and the node of filter inductance (L3) are the effluve end (HGND) be connected with a charge/discharge control circuit, go here and there and be provided with high-power voltage-stabilizing tube between the negative electrode of described high-voltage diode (D11) and effluve end (HGND);
The negative electrode of described high-voltage diode (D11) is the high-voltage output end of described high voltage direct current generator.
2. high-voltage insulating resistance monitoring alarm instrument according to claim 1, it is characterized in that: described charge/discharge control circuit comprises: for controlling described effluve end (HGND) with the relay (K4) of the systematically break-make of tested high-tension apparatus, for controlling 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) is connected with described central controller.
3. high-voltage insulating resistance monitoring alarm instrument according to claim 1, is characterized in that: described central controller is connected with heating control circuit, data communication interface, switching value input circuit and the locking control circuit for the on/off that controls described tested high-tension apparatus.
4. the method for work of a high-voltage insulating resistance monitoring alarm instrument as claimed in claim 1, it is characterized in that comprising: after test terminates, charge/discharge control circuit described in described central controller controls connects discharge loop, with the residual high pressure of automatically releasing on described tested high-tension apparatus.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210287526.3A CN102798782B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulation resistance monitoring alarm |
| CN201510213236.8A CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
| CN201510212864.4A CN104833855B (en) | 2012-08-13 | 2012-08-13 | To the alarm of the insulaion resistance on-line monitoring of high-tension apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210287526.3A CN102798782B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulation resistance monitoring alarm |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510213236.8A Division CN104793058B (en) | 2012-08-13 | 2012-08-13 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
| 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 |
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| Publication Number | Publication Date |
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| CN102798782A CN102798782A (en) | 2012-11-28 |
| CN102798782B true CN102798782B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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 |
| 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 |
| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793058A (en) * | 2012-08-13 | 2015-07-22 | 伍俊 | High-voltage insulating resistance monitoring alarm device and working method thereof |
| 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 |
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| CN105158649B (en) * | 2015-06-03 | 2018-06-19 | 廖小雄 | The online state of insulation wireless monitoring device of electrical equipment and electrical |
| 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 |
| CN105675997B (en) * | 2016-03-10 | 2019-03-12 | 南通大学 | Vehicular battery group dynamic insulation resistor detecting device |
| CN105807138B (en) * | 2016-03-10 | 2019-03-01 | 南通大学 | The detection method of Vehicular battery group dynamic insulation resistance |
| CN107356814B (en) * | 2017-06-01 | 2021-11-16 | 意昂神州（北京）科技有限公司 | Insulation resistance detecting system |
| CN110554237A (en) * | 2018-05-30 | 2019-12-10 | 王建明 | Intelligent test system for insulation resistance of high-voltage motor |
| 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 CN201210287526.3A patent/CN102798782B/en active Active
- 2012-08-13 CN CN201510213236.8A patent/CN104793058B/en active Active
- 2012-08-13 CN CN201510212864.4A patent/CN104833855B/en active Active
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| CN2166460Y (en) * | 1993-09-02 | 1994-05-25 | 施亚民 | Computerized high-voltage insulation resistance tester |
| CN102520248A (en) * | 2011-12-05 | 2012-06-27 | 河南省电力公司南阳供电公司 | Insulation resistance and grounding resistance comprehensive tester based on programmable power supply |
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| CN104793058A (en) * | 2012-08-13 | 2015-07-22 | 伍俊 | High-voltage insulating resistance monitoring alarm device and working method thereof |
| CN104793058B (en) * | 2012-08-13 | 2017-06-06 | 伍俊 | High-voltage insulating resistance monitoring alarm instrument and its method of work |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104793058B (en) | 2017-06-06 |
| CN104833855A (en) | 2015-08-12 |
| CN104793058A (en) | 2015-07-22 |
| CN104833855B (en) | 2017-08-11 |
| CN102798782A (en) | 2012-11-28 |
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Address after: Xinghua City, Jiangsu province 225714 Chen Taizhou city town Yingbin Road No. two Patentee after: Wu Jun Address before: 213022 -601, room 9, unit C, Taihu garden, Xinbei District, Jiangsu, Changzhou Patentee before: Wu Jun |
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