CN203502558U - On-line monitoring device for switching-on/switching-off coil of transformer station high-voltage circuit breaker - Google Patents
On-line monitoring device for switching-on/switching-off coil of transformer station high-voltage circuit breaker Download PDFInfo
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- CN203502558U CN203502558U CN201320598409.9U CN201320598409U CN203502558U CN 203502558 U CN203502558 U CN 203502558U CN 201320598409 U CN201320598409 U CN 201320598409U CN 203502558 U CN203502558 U CN 203502558U
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Abstract
The utility model discloses an on-line monitoring device for a switching-on/switching-off coil of a high-voltage circuit breaker. The on-line monitoring device comprises a switching-off coil current detecting device, a switching-off coil voltage detecting device, a switching-off coil temperature detecting device, a switching-on coil current detecting device, a switching-on coil voltage detecting device, a switching-on coil temperature detecting device and a box temperature detecting device, all of which are connected with a signal modulation module. An output end of the signal modulation module is connected with an A/D sampler and a central processor in sequence. An input end of central processor is connected with a power supply module. An output end of the central processor is connected with a communication module and an intermediate relay. The on-line monitoring device is capable of monitoring work parameters of the switching-on/switching-off coil in real time and transmitting the parameters to the central processor after the parameters are processed and sampled, and the central processor judges and estimates whether the switching-on/switching-off coil works normally or not according to the various parameter values, so that the problem can be found in time, and heavy losses are prevented.
Description
Technical field
The utility model relates to a kind of electric power online pick-up unit, relates in particular to a kind of divide/closing coil of transformer high-voltage isolating switch on-line measuring device.
Background technology
In Operation of Electric Systems, often there is divide/Burnout of Closing Coil accident; minute/closing coil is the final executive component in electric power system control, protection loop; be again one of critical elements in primary cut-out electromagnetic operating mechanism, the safe and reliable operation of electric system is had to very important effect.
Minute/closing coil is as a kind of instantaneous operation element, and often divide/Burnout of Closing Coil accident of generation is in operation.As everyone knows, during the design of divide/closing coil, all by energising design in short-term, due to the difference of operating mechanism, divide/closing coil electric current is difference also.Minute/the burning of closing coil, be mainly due to minute/electric current in closing coil loop can not normal cutoff, cause minute/closing coil is switched on for a long time and is caused.
When electric system is out of order, as important electrical equipment isolating switch, accepts the divide/combined floodgate order of relay protection and aut.eq., and require to go to carry out divide/feed motion with the speed of Millisecond, to avoid accident to spread and to expand.Therefore, require isolating switch in putting into operation, can be in the state of standing ready, and can not tripping, not malfunction.While especially not allowing to have trip signal, the phenomenon of isolating switch refusal tripping operation.GB_T_14285-2006 relay protection and automatic safety device technical regulation explicitly call for each isolating switch minute/closing circuit of closing circuit, visual plant and line-breaker etc., monitoring arrangement that all should installment monitor circuit complete.
At present, secondary loop of breaker integrity monitoring method has four kinds both at home and abroad: the one, and adopt red (green) lamp loop of simple, intuitive directly to monitor; The 2nd, adopt the indirect supervision of jumping (closing) gate position relay normally closed contact tandem promoter central signal; The 3rd, in the operating means that part manufacturing firm provides, be combined with the trip(ping) circuit integrity monitoring signal lamp (neon lamp) under "on" position, the 4th, in serial connection is high, ohm relay is in trip(ping) circuit.By the analysis to four kinds of surveillance styles, first three kind mode exists a common problem to be: after breaker closing, closing circuit integrality loses supervision; After circuit breaker trip, trip(ping) circuit integrality loses supervision, all belongs to non-full operating condition monitoring.The trip(ping) circuit of the 4th kind of mode belongs to full operating condition monitoring, but closing circuit still belongs to non-full operating condition monitoring.So under "on" position, after tripping operation, can close again and still belong to unknown, the online function detecting of do not possess minute/closing coil of above four kinds of modes, it is only supervision effect, when coil characteristics is because parameter change when (coil occur turn-to-turn short circuit, coil self insulation reduce etc.) and tripping, monitoring circuit is normal.Power supply reliability will lose assurance, not be still real full operating condition monitoring.These problems should change and draw attention, and take necessary measure to be improved.The more important thing is, above four kinds of modes do not possess the defencive function of breaker tripping and closing coil.
When straight-flow system breaks down, cause voltage instability, or in the situation of accumulator capacity deficiency, adopt manually divide/close a floodgate, remote control divides/closes a floodgate, particularly prepared auto restart divides/closes a floodgate or during automatic reclosing, divide/closing coil is for a long time with the electric current of 0.4～2.2A.The length of its electrification time depends on the time of combined floodgate holding circuit deenergization.Divide/closing coil and guard relay are long charged, after switching on approximately 5～6 seconds, will burn out coil.The protected mode of divide at present/closing coil has two kinds.The one, the time relay in parallel is protected closing coil, and the electric pressure of time relay sj determines according to switching voltage, and the contact capacity of time relay sj determines according to the rated current of coil.The time setting of time relay sj is greater than the closing time of vacuum switch, and time setting is unsuitable oversize, to prevent that coil heating from causing insulation to decline.Select time relay SJ wants contact capacity large, and coil motion voltage range is wide.Because the closing time of vacuum switch is generally less than 0.1s, the delay time of SJ is adjusted as 1.0s.Can effectively prevent that breaker closing coil from being burnt phenomenon.The 2nd, by divide-shut brake coil protect device for secondary circuit; major function be protection divide-shut brake coil can be by over-voltage breakdown, effectively weaken or eliminate contact arc discharge phenomenon or greatly weaken the contact energy of striking sparks; and electrification time while thering is automatic limiting; prevent that isolating switch is when action, the long charged generation that makes the serious heating burnout accident of coil of coil.
Divide/Burnout of Closing Coil of the isolating switch happening occasionally in conjunction with electric system phenomenon; along with vast power customer is more and more higher to power supply reliability requirement, yet up to the present also still do not have to occur specially to the online method that detects and protect of the full operating mode of divide/closing coil of isolating switch.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of reliability is high, divide/closing coil of the transformer high-voltage isolating switch on-line measuring device of strong interference immunity.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of high-voltage circuit breaker/closing coil on-line measuring device, be arranged in the casing of installation high-voltage isolating switch, comprise the switching winding current sensing means that detects switching winding parameter, switching winding voltage check device and switching winding temperature-detecting device, detect the closing coil current sensing means of closing coil parameter, closing coil voltage check device and closing coil temperature-detecting device, detect the spin manifold temperature pick-up unit of temperature in described casing, described switching winding current sensing means, described switching winding voltage check device, described switching winding temperature-detecting device, described closing coil current sensing means, described closing coil voltage check device, the output terminal of described closing coil temperature-detecting device and spin manifold temperature pick-up unit is connected to respectively signal modulation module, the output terminal of described signal modulation module is connected with A/D sampling thief, the output terminal of described A/D sampling thief is connected with central processing unit, the input end of described central processing unit is also connected with power module, the output terminal of described central processing unit is connected to communication module and described auxiliary reclay.
As preferred technical scheme, described switching winding current sensing means, described switching winding voltage check device, described closing coil current sensing means and described closing coil voltage check device are set to respectively Hall element.
As the improvement to technique scheme, described switching winding temperature-detecting device, described closing coil temperature-detecting device and spin manifold temperature pick-up unit are set to respectively thermistor.
Owing to having adopted technique scheme, the beneficial effects of the utility model are: by switching winding current sensing means, switching winding voltage check device, switching winding temperature-detecting device, closing coil current sensing means, closing coil voltage check device, the running parameter of can detect in real time minute/closing coil of closing coil temperature-detecting device and spin manifold temperature pick-up unit, and by its processing, after sampling, transfer to central processing unit, by central processing unit, according to various parameter values, judged and whether estimate minute/closing coil normally works, and then pinpoint the problems timely, prevent from causing heavy losses.This device Neng control center carries out online detection in real time to the situation in Substation Operating loop; Detect in real time assessment result, direct guidance can be provided for the operation maintenance of primary cut-out, the full operating mode that improves the reliability of power supply and really realize primary cut-out secondary circuit is supervised and instantaneous intelligent protection; The application of pick-up unit does not produce any negative effect to the original primary cut-out operation circuit of electric system.
Accompanying drawing explanation
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the structured flowchart of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, further set forth the utility model.In the following detailed description, only by the mode of explanation, some one exemplary embodiment of the present utility model has been described.Undoubtedly, those of ordinary skill in the art can recognize, in the situation that not departing from spirit and scope of the present utility model, can to described embodiment, revise by various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than for limiting the protection domain of claim.
As shown in Figure 1, a kind of high-voltage circuit breaker/closing coil on-line measuring device, be arranged in the casing of installation high-voltage isolating switch, comprise the switching winding current sensing means that detects switching winding parameter, switching winding voltage check device and switching winding temperature-detecting device, detect the closing coil current sensing means of closing coil parameter, closing coil voltage check device and closing coil temperature-detecting device, detect the spin manifold temperature pick-up unit of temperature in described casing, described switching winding current sensing means, described switching winding voltage check device, described switching winding temperature-detecting device, described closing coil current sensing means, described closing coil voltage check device, the output terminal of described closing coil temperature-detecting device and spin manifold temperature pick-up unit is connected to respectively signal modulation module, the output terminal of described signal modulation module is connected with A/D sampling thief, the output terminal of described A/D sampling thief is connected with central processing unit, the input end of described central processing unit is also connected with power module, the output terminal of described central processing unit is connected to communication module and described auxiliary reclay.
Described switching winding current sensing means, described switching winding voltage check device, described closing coil current sensing means and described closing coil voltage check device are set to respectively Hall element; Described switching winding temperature-detecting device, described closing coil temperature-detecting device and spin manifold temperature pick-up unit are set to respectively thermistor.
The specific works process of this device is:
First, utilize described switching winding current sensing means and described switching winding voltage check device to detect electric current and the voltage parameter of switching winding, or utilize described closing coil current sensing means and described closing coil voltage check device to detect electric current and the voltage parameter of cooperation coil, and the electric current detecting and voltage parameter are delivered to described signal modulation module carry out modulation treatment.
The quality divide/size of closing coil electric current, the length of duration having reflected primary cut-out mechanical operating mechanism, embodied the quality of the mechanical property of primary cut-out, once operating mechanism performance is bad, directly affect the size of the divide/closing coil electric current of primary cut-out; Moreover the resistance of different high-voltage circuit breaker/closing coils and reactance are different, the electric current of correspondingly divide/closing coil can be not identical yet; Also have, the steepness that the resistance that different minutes/closing coil is different and reactance parameter can affect Current rise, can increase the uncertain factor of measuring error.By test of many times, set " action current ", " operation voltage ", " action resistance value " threshold value or threshold value, the electric current of high-voltage circuit breaker/closing coil, voltage, resistance have the process of a variation, different time point corresponding to threshold value meeting, therefore arranging of different threshold values can produce the different initial time that divide/closes a floodgate; According to dividing/electric current of closing coil and the standing state of voltage, dope minute/electric current of closing coil and the succeeding state of voltage, thereby anticipation has the fault that will occur, solve in standing state the only found phenomenon of ability in the situation that breaking down of divide/closing coil, and remind in time operating personnel to note, to reduce the probability of high-voltage circuit breaker/closing coil fault, thereby improve the safe reliability of power system power supply.
Secondly, the signal after modulation treatment is input to described A/D sampling thief and samples, and sampled signal is delivered in central processing unit, utilize central processing unit to carry out digitized processing to sampled signal.
Divide/closing coil of the utility model thermometric adopts thermistor as temperature sensor, temperature sensor is arranged on to high-voltage circuit breaker/closing coil surface, dynamic temperature is by repeatedly testing, closely simulate recurrent condition in sensor use as far as possible, obtain the rationally approximate of sensor dynamic property.The resistance of measured value in the time of 25 ℃ is 5k Ω, and the temperature change of every 1 ℃ causes the resistance variations of 200 Ω.The lead resistance of 10 Ω only causes insignificant 0.05 ℃ of error, has therefore improved significantly the accuracy of online detection.
The utility model can prevent that primary cut-out from breaking and occurring primary cut-out misaction because of trip(ping) circuit.Tripping meeting expands fault, even causes system break-down, and consequence is serious.Compare with sub-gate circuit integrality, although the harm causing when closing circuit integrality is destroyed is smaller, it has hindered the raising of power supply reliability.The particularly extensive application of inlet wire backup auto-activating device, still should be monitored, to improve power supply reliability and really to realize the full operating condition monitoring of secondary loop of breaker.Secondary circuit integrity monitoring and divide/closing circuit electric current, monitoring voltage have general character, and the two is combined in the lump and is monitored, so both can improve the reliability of supervision, can reduce costs again.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. high-voltage circuit breaker/closing coil on-line measuring device, be arranged in the casing of installation high-voltage isolating switch, it is characterized in that: comprise the switching winding current sensing means that detects switching winding parameter, switching winding voltage check device and switching winding temperature-detecting device, detect the closing coil current sensing means of closing coil parameter, closing coil voltage check device and closing coil temperature-detecting device, detect the spin manifold temperature pick-up unit of temperature in described casing, described switching winding current sensing means, described switching winding voltage check device, described switching winding temperature-detecting device, described closing coil current sensing means, described closing coil voltage check device, the output terminal of described closing coil temperature-detecting device and spin manifold temperature pick-up unit is connected to respectively signal modulation module, the output terminal of described signal modulation module is connected with A/D sampling thief, the output terminal of described A/D sampling thief is connected with central processing unit, the input end of described central processing unit is also connected with power module, the output terminal of described central processing unit is connected to communication module and auxiliary reclay.
2. a kind of high-voltage circuit breaker/closing coil on-line measuring device as claimed in claim 1, is characterized in that: described switching winding current sensing means, described switching winding voltage check device, described closing coil current sensing means and described closing coil voltage check device are set to respectively Hall element.
3. a kind of high-voltage circuit breaker/closing coil on-line measuring device as claimed in claim 1, is characterized in that: described switching winding temperature-detecting device, described closing coil temperature-detecting device and spin manifold temperature pick-up unit are set to respectively thermistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320598409.9U CN203502558U (en) | 2013-09-25 | 2013-09-25 | On-line monitoring device for switching-on/switching-off coil of transformer station high-voltage circuit breaker |
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| CN201320598409.9U CN203502558U (en) | 2013-09-25 | 2013-09-25 | On-line monitoring device for switching-on/switching-off coil of transformer station high-voltage circuit breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535925A (en) * | 2015-01-12 | 2015-04-22 | 国网上海市电力公司 | Power-uninterrupted operation method for state detection of circuit breaker mechanism |
| CN105490256A (en) * | 2016-01-20 | 2016-04-13 | 国网山东省电力公司滨州供电公司 | Control loop coil fault reducing device and method |
| CN105823981A (en) * | 2016-03-11 | 2016-08-03 | 国网天津市电力公司 | On-line monitoring system of high-voltage circuit breaker and data processing method thereof |
| CN104101832B (en) * | 2014-06-18 | 2017-02-08 | 国家电网公司 | High voltage circuit breaker movement characteristic test method |
| CN109188260A (en) * | 2018-08-01 | 2019-01-11 | 国网浙江省电力有限公司绍兴供电公司 | A kind of breaker actuation behavioural analysis device based on fuel factor and electric characteristic amount |
| CN110473747A (en) * | 2019-07-03 | 2019-11-19 | 威胜电气有限公司 | A kind of breaker and breaker operator recognition methods |
| CN112485655A (en) * | 2020-10-29 | 2021-03-12 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation circuit breaker |
-
2013
- 2013-09-25 CN CN201320598409.9U patent/CN203502558U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101832B (en) * | 2014-06-18 | 2017-02-08 | 国家电网公司 | High voltage circuit breaker movement characteristic test method |
| CN104535925A (en) * | 2015-01-12 | 2015-04-22 | 国网上海市电力公司 | Power-uninterrupted operation method for state detection of circuit breaker mechanism |
| CN105490256A (en) * | 2016-01-20 | 2016-04-13 | 国网山东省电力公司滨州供电公司 | Control loop coil fault reducing device and method |
| CN105490256B (en) * | 2016-01-20 | 2018-11-13 | 国网山东省电力公司滨州供电公司 | A kind of device and method reducing control loop coil fault |
| CN105823981A (en) * | 2016-03-11 | 2016-08-03 | 国网天津市电力公司 | On-line monitoring system of high-voltage circuit breaker and data processing method thereof |
| CN109188260A (en) * | 2018-08-01 | 2019-01-11 | 国网浙江省电力有限公司绍兴供电公司 | A kind of breaker actuation behavioural analysis device based on fuel factor and electric characteristic amount |
| CN110473747A (en) * | 2019-07-03 | 2019-11-19 | 威胜电气有限公司 | A kind of breaker and breaker operator recognition methods |
| CN110473747B (en) * | 2019-07-03 | 2021-12-07 | 威胜电气有限公司 | Circuit breaker and circuit breaker operation identification method |
| CN112485655A (en) * | 2020-10-29 | 2021-03-12 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation circuit breaker |
| CN112485655B (en) * | 2020-10-29 | 2022-05-31 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation breaker |
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