CN103245882A - Integrated power failure indication and condition monitoring device - Google Patents
Integrated power failure indication and condition monitoring device Download PDFInfo
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- CN103245882A CN103245882A CN2013101509599A CN201310150959A CN103245882A CN 103245882 A CN103245882 A CN 103245882A CN 2013101509599 A CN2013101509599 A CN 2013101509599A CN 201310150959 A CN201310150959 A CN 201310150959A CN 103245882 A CN103245882 A CN 103245882A
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Abstract
The invention relates to an integrated power failure indication and condition monitoring device. The device comprises a copper bar, temperature sensors, a current transformer, a Rogowski coil, a potential indicator, a DTU (Data Terminal Unit) and a control panel and is characterized in that the copper bar is a cylindrical copper bar coated with an insulation sheath; the upper end of the copper bar is connected with that of a switch cabinet, the lower end of the copper bar is connected with a cable, and the upper end and the lower end of the copper bar are tightened through big screws and nuts respectively; the two temperature sensors are mounted at the upper end and the lower end of the copper bar respectively; the Rogowski coil and the voltage sensor are mounted in the middle of the copper bar; the potential indicator is also mounted on the copper bar; and the whole device is sleeved with an insulating housing. The device integrates secondary monitoring equipment and primary equipment into one module, so that only electrical connection of the primary equipment with a simple structure is needed while on-site mounting of the complex secondary equipment is not needed, thereby saving a great amount of power failure reformation time; and meanwhile, inconvenience caused by battery replacement of the failure indicator is solved, and the failure indicator is connected with an in-station direct current supply, which ensures that the failure indicator can run normally for a long time.
Description
Technical field
The invention belongs to power distribution automation technical field, relate to the real-time monitoring of the identification of electrical equipment fault high reliability and power equipment hidden danger, especially a kind of integrated power failure indication and state monitoring apparatus.
Background technology
Fault detector is used very extensive as a kind of important tool of searching trouble spot on the power circuit in power industry.Fault detector provides great convenience by detecting outlet, branch and the section at distribution line failure electric current indication fault place to trouble-shooting.Though developed country's power distribution automation level is very high, the main mode of searching distribution line failure still relies on fault detector.But there is following defective in the existing fault indicator: 1, the working power problem of fault detector, the working power of traditional fault detector has dual mode, first kind is to use lithium battery that power supply is provided, battery electric quantity can use 3-4 usually, surpass that battery can take place not work tenure of use or situation such as fault misdescription, bring influence to the operation of intelligent power distribution net, and controller switching equipment quantity is ten hundreds of, very huge, changing battery is again the thing of a time and effort consuming.Second kind is the current draw working power of utilizing a circuit of electrical network, and this kind working power needs electric current on the circuit can not be less than its minimum working current, but just can not use on the less circuit of some little circuit branches and load.2, the malfunction of fault detector and tripping problem, the indicator accuracy present for short trouble can not reach 100%, misoperation sometimes, reason mainly contains: when a equipment normally moves, because cyclization, solution on the circuit are also operated and the switching of the big load equipment of electricity consumption side, produce dash current sometimes, cause the fault detector misoperation suddenly; B motor feedback is sent electric problem, and motor stall at once when namely being short-circuited transfers generator to by motor and send electricity to the loop that short dot constitutes, or discharging and recharging of capacitor and produce send electric current, and electric current moment amplitude is very big, decays to zero subsequently.Because the outlet breaker tripping operation of previous transformer station, indicator is experienced electric current, voltage again and all reduced to zero, and is similar with fault current, causes the fault detector indication of non-fault branch circuit or load-side wrong.This is indeterminable problem still at present; The traditional fault detector of c can only the detection line fault, does not possess status monitoring function.
Development along with intelligent grid, the status monitoring of power distribution network more and more comes into one's own, when accident takes place, do not become distribution future development trend with regard to the discovering device potential safety hazard, but the existing fault indicator can only detect the generation of fault by excess current etc., can not discovering device hidden danger., equipment such as fault detector, current transformer, electrification display, cable end temperature measurement module construction, install loaded down with trivial details.And traditional power distribution automation transformation for remote measurement amounts such as the electric current on the detection line, voltage, temperature, need be installed numerous mutual inductors, sensor etc. at cable.In addition, to the power distribution network transformation, the power off time of permission is very limited in the completed region of the city, need the Fast Installation automation equipment, therefore install, connect a large amount of mutual inductors, sensor device at cable, not only step is very loaded down with trivial details, make mistakes easily, also take on-the-spot power off time in a large number.So existing power distribution automation renovation technique is not enough to some extent.
Summary of the invention
The objective of the invention is to overcome the weak point of original technology, provide a kind of integrated power failure indication and state monitoring apparatus, the electric current when this device breaks down according to cable on the cable and the Changing Pattern of voltage, failure judgement position; The concept of bonding state monitoring simultaneously, some potential safety hazards that exist in the time of can the checkout equipment operation.
The technical scheme that technical solution problem of the present invention adopts is:
A kind of integrated power failure indication and state monitoring apparatus comprise copper bar, temperature sensor, current transformer, Luo-coil, band point indicator and DTU, and it is characterized in that: described this copper bar is a cylindrical copper bar, and its outer rim is coated with insulation sheath; The copper bar of the last termination switch cubicle of this copper bar, following terminated cable are also used the king bolt nut screwing clamping respectively, the upper/lower terminal of copper bar is installed two temperature sensors respectively, there are a Luo-coil and a voltage sensor in the middle part, one potential indicator also is installed on this copper bar, and whole device is set with an insulation crust outward.
And, the temperature sensor that described copper bar is installed and each coil, its wiring is received on the inner terminal row and is drawn, outside dress aviation plug.
Advantage of the present invention and good effect are:
1, this device only needs secondary monitoring equipment and the integrated module of primary equipment when mounted primary equipment simple in structure is electrically connected, and does not need to reproduce a secondary device that complexity is installed, and saves a large amount of power failure transformation times; Solved fault detector simultaneously and need change the inconvenience of battery, connected direct supply in the station, can guarantee namely that fault detector runs well for a long time.
2, the fault decision logic of this device is changed to some extent, can mask two kinds of false faults, and huge effect has been played in the true(-)running of power distribution automation.
3, this device has increased status monitoring function, solve traditional fault detector and can only gather cable short circuit or earth fault, can not monitor cable splice and connect the hidden danger that does not closely cause, can not monitor near the generation whether shelf depreciation is arranged the cable splice, can make equipment when breaking down, the accident that prevents is in possible trouble.
4, this device solves power distribution automation station loaded down with trivial details difficult problem of erecting equipment when transforming, solve measure, inconvenience that monitoring device is installed, save the power failure transformation time, bring huge social, economic benefit.
Description of drawings
Fig. 1 is parts connection diagram of the present invention.
Embodiment:
For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows.Need to prove that present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention thus.
A kind of integrated power failure indication and state monitoring apparatus, comprise copper bar 10, temperature sensor 2(8), current transformer 12, Luo-coil 11, band point indicator 9 and DTU, display panel 6, this copper bar is a cylindrical copper bar, and its outer rim is coated with insulation sheath; The upper end 1 of this copper bar connects the copper bar of switch cubicle, lower end 7 connects cable, and use king bolt nut (the present embodiment accompanying drawing does not illustrate) to tighten respectively, the upper/lower terminal of copper bar is installed two temperature sensors respectively, there are a Luo-coil and a voltage sensor in the middle part, one potential indicator also is installed on this copper bar, and whole device is set with an insulation crust 3 outward.
The temperature sensor that copper bar is installed and each coil, its wiring are received on the inner terminal row 5 and are drawn, and outside dress aviation plug is pegged graft when being convenient to on-the-spot the installation.
This device fault judge the logical method take the compound judgement of electric current making alive, step is:
1, uses MSP430F149 single-chip microcomputer 4, operating voltage 2.7---3.6V.Earlier potential indicator voltage is inserted single-chip microcomputer first via A/D input interface, the monitoring input value is less than the 5%(busbar decompression of busbar rated voltage), open as fault detect.
2, the current value with current transformer is converted into magnitude of voltage, input single-chip microcomputer the second road A/D input interface, and when detecting unlatching, every 4ms gathers once, gathers altogether 100 times.Per 10 samplings are used least square method as one group, calculate a slope value K.
3, adjacent two K values are compared, rate of change then is considered as current break greater than X, is true fault; Rate of change then is considered as the electric current gradual change less than X, send electric fault for motor is counter.
4, with single-chip microcomputer one road I/O interface as output, connect the fault detector display panel, when detecting true fault, I/O exports high level, control panel is reported to the police.
5, two temperature sensors are inserted two-way A/D interface, by single-chip microcomputer output digital value, show temperature of cable junction by the digital display screen on the panel.
The principle of work of this device is:
Employing external direct current power supply power supply is installed electric current and potential indicator at device, installs two temperature measurement modules additional, and the temperature of measuring switch cabinet busbar and two contact points of cable splice is monitored the hidden danger of loose contact in real time; Install Luo-coil additional at device, draw two wiring, send DTU to, judge whether to exist shelf depreciation by the DTU algorithm.
Claims (2)
1. an integrated power failure is indicated and state monitoring apparatus, comprise copper bar, temperature sensor, current transformer, Luo-coil, band point indicator and DTU, it is characterized in that: described this copper bar is a cylindrical copper bar, and its outer rim is coated with insulation sheath; The copper bar of the last termination switch cubicle of this copper bar, following terminated cable are also used the king bolt nut screwing clamping respectively, the upper/lower terminal of copper bar is installed two temperature sensors respectively, there are a Luo-coil and a voltage sensor in the middle part, one potential indicator also is installed on this copper bar, and whole device is set with an insulation crust outward.
2. integrated power failure according to claim 1 is indicated and state monitoring apparatus, it is characterized in that: the temperature sensor that described copper bar is installed and each coil, its wiring are received on the inner terminal row and are drawn, outside dress aviation plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310150959.9A CN103245882B (en) | 2013-04-27 | 2013-04-27 | The power failure instruction of integration and state monitoring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310150959.9A CN103245882B (en) | 2013-04-27 | 2013-04-27 | The power failure instruction of integration and state monitoring apparatus |
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| CN103245882A true CN103245882A (en) | 2013-08-14 |
| CN103245882B CN103245882B (en) | 2015-11-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103900636A (en) * | 2014-03-18 | 2014-07-02 | 扬州科宇电力有限公司 | Online insulation and temperature monitoring system used for 12kV solid insulated switch cabinet |
| CN104714070A (en) * | 2013-12-13 | 2015-06-17 | 广东四会互感器厂有限公司 | Current sensor adopting differential coil structure |
| CN110286265A (en) * | 2019-07-24 | 2019-09-27 | 四川电器集团股份有限公司 | Contact arm measure annular device for vacuum circuit breaker |
| CN110658422A (en) * | 2018-06-29 | 2020-01-07 | Abb瑞士股份有限公司 | Fail-safe retrofit kit for partial discharge monitoring system and pre-installed Voltage Indication System (VIS) |
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| CN201174529Y (en) * | 2007-09-04 | 2008-12-31 | 赵国生 | Contact box having Rogowski coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104714070A (en) * | 2013-12-13 | 2015-06-17 | 广东四会互感器厂有限公司 | Current sensor adopting differential coil structure |
| CN103900636A (en) * | 2014-03-18 | 2014-07-02 | 扬州科宇电力有限公司 | Online insulation and temperature monitoring system used for 12kV solid insulated switch cabinet |
| CN110658422A (en) * | 2018-06-29 | 2020-01-07 | Abb瑞士股份有限公司 | Fail-safe retrofit kit for partial discharge monitoring system and pre-installed Voltage Indication System (VIS) |
| CN110658422B (en) * | 2018-06-29 | 2024-05-28 | Abb瑞士股份有限公司 | Failsafe retrofit kit for partial discharge monitoring systems and pre-installed Voltage Indication Systems (VIS) |
| CN110286265A (en) * | 2019-07-24 | 2019-09-27 | 四川电器集团股份有限公司 | Contact arm measure annular device for vacuum circuit breaker |
| CN110286265B (en) * | 2019-07-24 | 2024-05-10 | 河北杰能电气设备有限公司 | Contact arm measuring ring device for vacuum circuit breaker |
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| CN103245882B (en) | 2015-11-11 |
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