CN203054168U - High-tension switch cabinet partial discharge and contact overheating dual-fault detection device - Google Patents
High-tension switch cabinet partial discharge and contact overheating dual-fault detection device Download PDFInfo
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- CN203054168U CN203054168U CN 201320056634 CN201320056634U CN203054168U CN 203054168 U CN203054168 U CN 203054168U CN 201320056634 CN201320056634 CN 201320056634 CN 201320056634 U CN201320056634 U CN 201320056634U CN 203054168 U CN203054168 U CN 203054168U
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Abstract
The utility model discloses a high-tension switch cabinet partial discharge and contact overheating dual-fault detection device, comprising an air exhaust switch, a vacuum pump, an ozone sensor, a sulfuretted hydrogen sensor, an abnormal smell sensor, a particle concentration sensor, a plurality of gas channels, a digital display voltmeter, a first balancing resistance, a second balancing resistance, and a selector switch. The air exhaust switch and the vacuum pump are connected in series and then the air exhaust switch and the vacuum pump are connected with an anode end and a cathode end of a power supply. Each of the ozone sensor, the sulfuretted hydrogen sensor, the abnormal smell sensor, and the particle concentration sensor are connected with the power supply. The digital display voltmeter detects estimated values of the plurality of sensors respectively through balanced bridges which are provided with the selector switch. Compared with the prior art, the high-tension switch cabinet partial discharge and contact overheating dual-fault detection device enables to rapidly detect two types of faults of discharge and contact overheat.
Description
Technical field
The application relates to high-tension apparatus detection technique field, particularly relates to overheated pair of failure detector of a kind of high-tension switch cabinet shelf depreciation and contact.
Background technology
High-tension switch cabinet is being undertaken in electric system and is being closed the dual-use function that closes and disconnect power circuit, protection system safety; along with electric system towards high voltage, big unit, jumbo developing rapidly; electrical network enlarges and the penetration and promotion of the unattended management mode of transformer station and comprehensive automation day by day, and the safe operation of high-tension switch cabinet is more and more important.In the high-tension switch cabinet during joint loose contact of plug-in strip contact, power cable turnover line, contact resistance increases, produce the heating phenomenon in the out-of-date meeting of load current flow, overheated meeting causes that the physical strength of metal material descends, and insulating material wears out and also may cause puncturing the formation accident.In high-tension switch cabinet, between hole in the solid insulation, the insulation course of different qualities, and the sharp edges place of metal (or semiconduction) electrode, because the breakdown field strength of gas is more much lower than solid dielectric, electric field in the gas often produces shelf depreciation at the position of air gap again than high in the solid dielectric.These shelf depreciations can cause dielectric insulating strength progressively to descend, and finally cause the damage of insulating.In addition, also there is the leakage of SF6 gas in the high-tension switch cabinet, can causes the decline of equipment performance equally.Therefore, measure and monitor the running status that high-tension switch cabinet is interior, be to avoid major accident that the powerful measure of fault deterioration takes place and controls, for the normal operation that guarantees high-tension switch cabinet, the operational reliability and the automaticity that improve electric system have very important significance.
As seen from the above description, there is diversity in the fault of high-tension switch cabinet, abnormal conditions such as, shelf depreciation overheated such as contact, SF6 leakage.And pass through prior art research, the applicant finds: the test instrumentation measuring ability of existing high-tension switch cabinet is single at present, can only a certain fault be monitored monitoring when can't finish various fault.For example: the employing infra-red thermal imaging only can be realized the monitoring to heating accident, and the high-frequency ultrasonic pick-up unit only can be surveyed shelf depreciation.
The utility model content
In view of this, the embodiment of the present application provides a kind of high-tension switch cabinet shelf depreciation and overheated pair of failure detector of contact, can carry out fast detecting to shelf depreciation and the overheated two kinds of faults of contact.
To achieve these goals, the technical scheme that provides of the embodiment of the present application is as follows:
Overheated pair of failure detector of a kind of high-tension switch cabinet shelf depreciation and contact, bleed switch, vacuum pump, ozone sensor, hydrogen sulfide sensor, peculiar smell sensor, granule density sensor, a plurality of gas passage, digital voltmeter, first balance resistance, second balance resistance and change-over switch, wherein:
The described switch of bleeding is in series with vacuum pump and then is connected with the positive and negative end of power supply;
Two input ends of each sensor all are connected with the positive pole of power supply in described ozone sensor, hydrogen sulfide sensor, peculiar smell sensor and the granule density sensor; The output terminal of described ozone sensor, hydrogen sulfide sensor and granule density sensor is connected with the negative pole of power supply; And two output terminals of described peculiar smell sensor all are connected with the negative pole of power supply;
Described digital voltmeter and described first balance resistance, the second balance resistance Compositional balance electric bridge, and the input end of described balanced bridge is connected with the positive pole of power supply, output terminal is connected with the negative pole of power supply respectively, and the test side is connected with the stiff end of change-over switch;
The rotation end of described change-over switch is rotatable to be connected respectively with input end of ozone sensor and by peculiar smell sensor one end, hydrogen sulfide sensor one end and the common port that granule density sensor one end is connected, and described common port is connected with power cathode by the 3rd slide rheostat.
Preferably, this pick-up unit also comprises: voltage stabilizing chip and filter capacitor C, wherein:
The input end of described voltage stabilizing chip is connected with positive source, and output terminal is connected with the input end of each sensor, the input end of balanced bridge; The feedback end of described voltage stabilizing chip is connected with power cathode;
Described filter capacitor C is connected between described voltage stabilizing chip output and the power cathode.
Preferably, this pick-up unit also comprises:
Be connected on first resistance between input end of described voltage stabilizing chip output and ozone sensor;
Be connected on first current regulator diode and first slide rheostat between described voltage stabilizing chip output and another input end of ozone sensor, and an end of described first current regulator diode links to each other with described voltage stabilizing chip output, and the other end is as rotating the test side that end is connected with described change-over switch;
Be connected on the 5th resistance between input end of described voltage stabilizing chip output and peculiar smell sensor;
Be connected on the 3rd resistance between input end of described voltage stabilizing chip output and hydrogen sulfide sensor;
Be connected on the 4th current regulator diode between described voltage stabilizing chip output and another input end of hydrogen sulfide sensor;
Be connected on the 4th resistance and the 6th resistance on two input ends of described granule density sensor respectively.
Preferably, described voltage stabilizing chip is 7805 chips.
Preferably, further comprise:
Be used for judging respectively whether the detected value that utilizes digital voltmeter to detect five kinds of described gas sensors surpasses preset value; And when the detected value of some or a plurality of gas sensors surpasses preset value, determine to occur in the described high-tension switch cabinet voltage comparator with the fault category of the one or more described gas sensor institute relative pass of test item.
By above technical scheme as seen, this high-tension switch cabinet shelf depreciation that the embodiment of the present application provides and overheated pair of failure detector of contact, utilize vacuum pump to extract the interior gas of high-tension switch cabinet as sample gas, and sample gas is transported to ozone sensor, hydrogen sulfide sensor, the peculiar smell sensor, in the granule density sensor, utilize a plurality of gas detection sensors respectively special component content different in the sample gas to be detected, respectively detected value and preset value are compared again, when the content of some in the detected gas or a plurality of special components surpasses preset value, determine to occur in the high-tension switch cabinet fault category relevant with these one or more special components.
Compared with prior art, overheated pair of failure detector of this high-tension switch cabinet shelf depreciation and contact, when utilizing high-tension switch cabinet to break down, the corresponding principle that changes can appear in its composition of gases within, and then by can detect the fault of high-tension switch cabinet to the gas componant analysis in the high-tension switch cabinet.So, when detecting, can finish fast fast detecting is carried out in discharge and the overheated two kinds of faults of contact.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of high-tension switch cabinet shelf depreciation that Fig. 1 provides for the embodiment of the present application and the electrical block diagram of overheated pair of failure detector of contact.
Embodiment
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all should belong to the scope of the application's protection.
Embodiment one:
A kind of high-tension switch cabinet shelf depreciation that Fig. 1 provides for the embodiment of the present application and the electrical block diagram of overheated pair of failure detector of contact.
As shown in Figure 1, this trouble-shooter comprises: the switch S of bleeding A3, vacuum pump M, ozone sensor 01, hydrogen sulfide sensor 03, peculiar smell sensor 04, granule density sensor 05(also claim smoke transducer), a plurality of gas passage (not shown), digital voltage Table V, the first balance resistance R13, the second balance resistance R14 and change-over switch SA2.
B is power supply among the figure, and the switch S of bleeding A3 and the vacuum pump M back that is in series is connected with the positive and negative end of power supply, and for convenience of entire circuit is controlled, and also is provided with power supply SA1 at the end of power supply B.In addition, in order to realize that voltage stabilization and current stabilization is carried out in the output of power supply B, as shown in Figure 1, in circuit, can also be provided with voltage stabilizing chip X and filter capacitor C, wherein: voltage stabilizing chip X is integrated regulator, and the input end of voltage stabilizing chip X is connected with power supply B positive pole, and output terminal is connected with the input end of each sensor, the input end of balanced bridge; The feedback end of voltage stabilizing chip X is connected with power supply B negative pole, is used for cell voltage is stabilized in 5V, gives sensor power supplies at different levels; C is filter capacitor, is connected between described voltage stabilizing chip X output terminal and the power supply B negative pole, is used for stable dc power supply voltage.
Two input ends of each sensor all are connected with the positive pole of power supply B in ozone sensor 01, hydrogen sulfide sensor 03, peculiar smell sensor 04 and the granule density sensor 05; The output terminal of ozone sensor 01, hydrogen sulfide sensor 03, peculiar smell sensor 04 and granule density sensor 05 is connected with the negative pole of power supply; And two output terminals of peculiar smell sensor 04 all are connected with the negative pole of power supply B.Here ozone can reflect partial discharge phenomenon whether occurs; And owing to be provided with electric power fat usually on contact, so occur when overheated when contact, electric power fat can decompose the gas that generation alkane etc. has peculiar smell, and then sulfuretted hydrogen, peculiar smell and particle then can be used for detecting the overheated fault of contact whether occurs.
As shown in Figure 1, digital voltage Table V and the described first balance resistance R13, the second balance resistance R14 Compositional balance electric bridge, and the input end of described balanced bridge is connected with the positive pole of power supply B, and output terminal is connected with the negative pole of power supply B respectively, and the test side is connected with the stiff end of change-over switch SA2.
The rotation end of change-over switch SA2 is rotatable to be connected respectively with the common port 3 that granule density sensor 05 1 end c are connected with input end 1 of ozone sensor 01 and by peculiar smell sensor 03 1 end a, hydrogen sulfide sensor 04 1 end b, and described common port is connected with power supply B negative pole by the 3rd slide rheostat R9.
And as shown in Figure 1, this circuit can also comprise: be connected on first resistance R 1 between the input end of described voltage stabilizing chip X output terminal and ozone sensor 01; Be connected on the second current regulator diode D2 and the first slide rheostat R7 between another input end of described voltage stabilizing chip X output terminal and ozone sensor 03, and the end of the described second current regulator diode D2 links to each other with the output terminal of described voltage stabilizing chip X, and the other end is as rotating the test side that end is connected with described change-over switch; Be connected on the 5th resistance R 5 between described voltage stabilizing chip X output terminal and 03 1 input ends of peculiar smell sensor; Be connected on the 3rd resistance R 3 between described voltage stabilizing chip X output terminal and 04 1 input ends of hydrogen sulfide sensor; Be connected on the 4th current regulator diode D4 between described voltage stabilizing chip X output terminal and hydrogen sulfide sensor 04 another input end; Be connected on the 4th resistance R 4 and the 6th resistance R 6 on 05 two input ends of described granule density sensor respectively.
In the embodiment of the present application, R1, R3, R4 are the accessory power supply resistance of sensor, are used to the electrolyte of sensor internal or accessory power supply that galvanic current stream is provided; D2, D4 are the output terminal current regulator diodes of sensor, because ozone, sulfur hexafluoride and hydrogen sulfide sensor are for decide electric current output in this circuit, so its output end current need fix by current regulator diode, provides convenience for the taking-up signal voltage simultaneously; R5, R6 are respectively the output terminal pull-up resistors of peculiar smell sensor and granule density sensor, provide convenience for taking out signal voltage; R10, R11, R12 is used for surveying the peculiar smell of heating, sulfuretted hydrogen, the output terminal of granule density sensor connects to simplify circuit, this is because all gases sensor output resistance all is inverse ratio with characteristic gas concentration, R10, R11, R12 three's resistance is identical, its resistance is much larger than the maximum output resistance of three sensors, the current potential of 3 of abc can show by a bit (point of 3 among the figure) in this master drawing, 3 current potential among the figure approximates the mean value of abc three point voltages, as long as peculiar smell is arranged, sulfuretted hydrogen, have a sensor to experience unusual in the granule density sensor and resistance diminishes, 3 current potential will descend; R13, R14 and D2, D4 and R5, R6 constitute balanced bridge, so just can detect the variation of each sensor output resistance in high sensitivity; V is digital voltmeter, is used for the unbalance voltage that shows balanced bridge directly perceived; R7, R9 are used for zeroing to obtain reference gas concentration, are convenient to detect.
When reality is used, owing to also have characteristic gas such as some particles, sulfuretted hydrogen, ozone in the air, and various places are different, therefore before checkout equipment, can surrounding air be set at reference value by getting outside air, regulate R7, R9 to bridge balance, voltage table V non-metering, checkout equipment again, just can compare facilities each characteristic gas of inner air and outside air in the difference of characteristic gas, thereby checkout equipment more easily; SA2 is the test item change-over switch, is used for switching heating, two kinds of test items of discharge, and wherein 1 of change-over switch is to detect discharge, and 3 is the detection tabs heating.
In other embodiment of the application, in order to make operating personnel's intuitive judgment type that is out of order more, and need not judge by the value that reads digital voltmeter, this device can also comprise: voltage comparator is used for judging respectively whether the detected value that utilizes digital voltmeter to detect five kinds of described gas sensors surpasses preset value; And when the detected value of some or a plurality of gas sensors surpasses preset value, determine to occur in the described high-tension switch cabinet fault category with the one or more described gas sensor institute relative pass of test item.
The technical scheme that is provided by above the embodiment of the present application as seen, this high-tension switch cabinet shelf depreciation that the embodiment of the present application provides and overheated pair of failure detector of contact, utilize vacuum pump to extract the interior gas of high-tension switch cabinet as sample gas, and sample gas is transported to ozone sensor, hydrogen sulfide sensor, the peculiar smell sensor, in the granule density sensor, utilize a plurality of gas detection sensors respectively special component content different in the sample gas to be detected, respectively detected value and preset value are compared again, when the content of some in the detected gas or a plurality of special components surpasses preset value, determine to occur in the high-tension switch cabinet fault category relevant with these one or more special components.
Compared with prior art, overheated pair of failure detector of this high-tension switch cabinet shelf depreciation and contact, when utilizing high-tension switch cabinet to break down, the corresponding principle that changes can appear in its composition of gases within, and then by can detect the fault of high-tension switch cabinet to the gas componant analysis in the high-tension switch cabinet.So, when detecting, can finish fast fast detecting is carried out in discharge and the overheated two kinds of faults of contact.
The above only is the application's preferred implementation, makes those skilled in the art can understand or realize the application.Multiple modification to these embodiment will be apparent to one skilled in the art, and defined General Principle can realize under the situation of the spirit or scope that do not break away from the application in other embodiments herein.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a high-tension switch cabinet shelf depreciation and overheated pair of failure detector of contact, it is characterized in that, bleed switch, vacuum pump, ozone sensor, hydrogen sulfide sensor, peculiar smell sensor, granule density sensor, a plurality of gas passage, digital voltmeter, first balance resistance, second balance resistance and change-over switch, wherein:
The described switch of bleeding is in series with vacuum pump and then is connected with the positive and negative end of power supply;
Two input ends of each sensor all are connected with the positive pole of power supply in described ozone sensor, hydrogen sulfide sensor, peculiar smell sensor and the granule density sensor; The output terminal of described ozone sensor, hydrogen sulfide sensor and granule density sensor is connected with the negative pole of power supply; And two output terminals of described peculiar smell sensor all are connected with the negative pole of power supply;
Described digital voltmeter and described first balance resistance, the second balance resistance Compositional balance electric bridge, and the input end of described balanced bridge is connected with the positive pole of power supply, output terminal is connected with the negative pole of power supply respectively, and the test side is connected with the stiff end of change-over switch;
The rotation end of described change-over switch is rotatable to be connected respectively with input end of ozone sensor and by peculiar smell sensor one end, hydrogen sulfide sensor one end and the common port that granule density sensor one end is connected, and described common port is connected with power cathode by the 3rd slide rheostat.
2. device according to claim 1 is characterized in that, this pick-up unit also comprises: voltage stabilizing chip and filter capacitor C, wherein:
The input end of described voltage stabilizing chip is connected with positive source, and output terminal is connected with the input end of each sensor, the input end of balanced bridge; The feedback end of described voltage stabilizing chip is connected with power cathode;
Described filter capacitor C is connected between described voltage stabilizing chip output and the power cathode.
3. device according to claim 2 is characterized in that, this pick-up unit also comprises:
Be connected on first resistance between input end of described voltage stabilizing chip output and ozone sensor;
Be connected on first current regulator diode and first slide rheostat between described voltage stabilizing chip output and another input end of ozone sensor, and an end of described first current regulator diode links to each other with described voltage stabilizing chip output, and the other end is as rotating the test side that end is connected with described change-over switch;
Be connected on the 5th resistance between input end of described voltage stabilizing chip output and peculiar smell sensor;
Be connected on the 3rd resistance between input end of described voltage stabilizing chip output and hydrogen sulfide sensor;
Be connected on the 4th current regulator diode between described voltage stabilizing chip output and another input end of hydrogen sulfide sensor;
Be connected on the 4th resistance and the 6th resistance on two input ends of described granule density sensor respectively.
4. device according to claim 3 is characterized in that, described voltage stabilizing chip is 7805 chips.
5. according to each described device of claim 1-4, it is characterized in that, further comprise:
Be used for judging respectively whether the detected value that utilizes digital voltmeter to detect five kinds of described gas sensors surpasses preset value; And when the detected value of some or a plurality of gas sensors surpasses preset value, determine to occur in the described high-tension switch cabinet voltage comparator with the fault category of the one or more described gas sensor institute relative pass of test item.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056634 CN203054168U (en) | 2013-01-29 | 2013-01-29 | High-tension switch cabinet partial discharge and contact overheating dual-fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320056634 CN203054168U (en) | 2013-01-29 | 2013-01-29 | High-tension switch cabinet partial discharge and contact overheating dual-fault detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054168U true CN203054168U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320056634 Expired - Lifetime CN203054168U (en) | 2013-01-29 | 2013-01-29 | High-tension switch cabinet partial discharge and contact overheating dual-fault detection device |
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| Country | Link |
|---|---|
| CN (1) | CN203054168U (en) |
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2013
- 2013-01-29 CN CN 201320056634 patent/CN203054168U/en not_active Expired - Lifetime
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Granted publication date: 20130710 |
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