CN105572517A - Online monitoring type intelligent electrified switching-in protection device of lightning arrester and control method - Google Patents
Online monitoring type intelligent electrified switching-in protection device of lightning arrester and control method Download PDFInfo
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- CN105572517A CN105572517A CN201610104869.XA CN201610104869A CN105572517A CN 105572517 A CN105572517 A CN 105572517A CN 201610104869 A CN201610104869 A CN 201610104869A CN 105572517 A CN105572517 A CN 105572517A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention relates to an online monitoring type intelligent electrified switching-in protection device of a lightning arrester and a control method. The device comprises a box body and a detection circuit embedded into the box body, wherein the detection circuit comprises an MCU (Micro-programmed Control Unit) control unit, an electric energy metering unit, a digital tube display unit, a power supply unit, a signal indication lamp unit, a buzzer, an operational amplification unit, a difference operational amplification unit, a current mutual induction unit, a current measuring unit and a voltage measuring unit. The method comprises the following steps: an equipment switching-in worker switches the device into a connection line of a monitor of the lightning arrester; and voltage and current are detected, and response of an indication lamp and the buzzer is combined to judge whether a temporary grounding wire is reliably grounded or not. The online monitoring type intelligent electrified switching-in protection device can be used for directly and reliably judging whether the grounding wire is reliably grounded or not; and functions of displaying grounding current and voltage by a digital tube and alarming by the buzzer and the like can be used for reminding the equipment switching-in worker that whether the temporary grounding wire is reliably grounded or not, so that hidden dangers are eliminated and safety coefficients of production are improved.
Description
Technical field
The present invention relates to a kind of lightning arrester on-line monitoring Intelligent live access protective device and control method.
Background technology
During the access of conventional oxidation zinc lightning arrester on-Line Monitor Device, need core-theaded type mutual inductor to seal in ground wire, this mutual inductor is installed in the connecting line of the top of Zinc-Oxide Arrester monitoring form meter usually.During site operation, be first shorting out over the ground with the top of a temporary grounding bundle of lines monitoring form meter, then untie the connecting line above monitoring form meter, seal in the core-theaded type mutual inductor of monitoring device, finally take back monitoring form meter again, reduction field wiring.The normally charged access of Zinc-Oxide Arrester on-Line Monitor Device, for ensureing the personal safety of equipment access personnel, must ensure that temporary ground wire reliably accesses.Reliable ground cannot be judged whether after common temporary ground wire has connect, there is certain potential safety hazard.
Summary of the invention
A kind of lightning arrester on-line monitoring Intelligent live is the object of the present invention is to provide to access protective device and control method, to overcome the defect existed in prior art.
For achieving the above object, technical scheme of the present invention is: a kind of lightning arrester on-line monitoring Intelligent live access protective device, the testing circuit comprising a casing and be embedded in this casing, described testing circuit comprises a MCU control unit, by the electric energy metrical unit that spi bus is connected with described MCU control unit, the numeral method unit be connected with described MCU control unit, the power supply unit be connected with described MCU control unit, the signal lamp unit be connected with described MCU control unit, the hummer be connected with described MCU control unit, the operation amplifier unit be connected with described electric energy metrical unit, the difference amplifier unit be connected with described electric energy metrical unit, the Current Mutual Inductance unit be connected with described operation amplifier unit, the current measuring unit be connected with described current transformer and the voltage measurement unit be connected with described difference amplifier unit.
In an embodiment of the present invention, described MCU control unit comprises a STM32 single-chip microcomputer.
In an embodiment of the present invention, described electric energy metrical unit comprises an IDT90E36.
In an embodiment of the present invention, described operation amplifier unit comprises an OPA2277, and described difference amplifier unit comprises an AMP03GS.
In an embodiment of the present invention, described power supply unit comprises a 12V chargeable lithium cell.
In an embodiment of the present invention, the base that described casing comprises a buckle closure and mates with this buckle closure, described buckle closure and described base are locked by a pair lock body, and described testing circuit is embedded in described base, described base comprises a base plate, a top board and side plate, described top board offers the first through hole for being embedded voltage display screen in described numeral method unit, for being embedded the second through hole of electric current display screen in described numeral method unit, for being embedded the third through-hole of power light in described signal lamp unit, for being embedded the fourth hole of the ground signalling pilot lamp being used to indicate reliable ground in described signal lamp unit, for being embedded the fifth hole of alarm indicator in described signal lamp unit, for being embedded the 6th through hole of line under-voltage pilot lamp in described signal lamp unit, for being embedded the 7th through hole of power switch in described power supply unit, for being embedded the 8th through hole of charging inlet in described power supply unit, for being embedded the 9th through hole of the first voltage link post in described voltage measurement unit, for being embedded the tenth through hole of the second voltage link post in described voltage measurement unit, for being embedded the 11 through hole of the first electric current binding post in described current measuring unit, for being embedded the 12 through hole of the second electric current binding post in described current measuring unit.
Further, also provide a kind of lightning arrester on-line monitoring Intelligent live to access the control method of protective device, provide a lightning arrester monitoring form meter, described lightning arrester monitoring form meter one end is connected with lightning arrester, and other end ground connection, comprises the steps:
Step S1: the power switch of opening power unit, make this lightning arrester on-line monitoring Intelligent live access protective device to power on, voltage display screen in numeral method unit shows the voltage of lithium battery in described power supply unit, and in signal lamp unit, alarm indicator is bright; If the voltage of this lithium battery is within the scope of the first supply voltage, then in signal lamp unit, power light is bright, otherwise, described in state battery undervoltage pilot lamp in signal lamp unit bright;
Step S2: the first voltage wiring terminal be connected with the first voltage link post in voltage measurement unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second voltage wiring terminal be connected with the second voltage link post in described voltage measurement unit is connected to ground, and check voltage that described voltage display screen shows whether within the scope of detection voltage threshold, if, then go to step S3, otherwise, go to step S5;
Step S3: the first current wiring terminal be connected with the first electric current binding post in current measuring unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second current wiring terminal be connected with the second electric current binding post in described current measuring unit is connected to ground, and check whether the electric current of the electric current display screen display in numeral method unit is detecting within the scope of current threshold, if, then go to step S4, otherwise, go to step S5;
Step S4: judge whether the voltage that described voltage display screen shows and the electric current measured by described lightning arrester monitoring form meter are 0, if, then hummer continuously and constant duration response, ground signalling pilot lamp in signal lamp unit is bright, described alarm indicator goes out, prompt facility access personnel's temporary ground wire reliable ground; Otherwise, go to step S5;
Step S5: described alarm indicator is bright, and described hummer does not respond, prompt facility access personnel temporary ground wire does not have reliable ground.
In an embodiment of the present invention, described first supply voltage scope is 10.8V ~ 20V; Described detection voltage threshold scope is: 0V ~ 36V; Described detection current threshold scope is 0mA ~ 5mA.
In an embodiment of the present invention, gathered current signal is carried out two passage amplifications by described operation amplifier unit, and by the small area analysis magnify 20 of range of current at 90uA ~ 500uA, by the Current amplifier 2 times of range of current at 500uA ~ 5mA.
In an embodiment of the present invention, described MCU control unit when calculating voltage value or current value, by repeatedly reading current measurement value and voltage measuring value, and the method for averaging after removing maximal value and minimum value.
Compared to prior art, the present invention has following beneficial effect:
(1) current measurement adopts core-theaded type mutual inductor, and adopts special computation chip to gather electric current, stable, reliable;
(2) voltage measurement circuit adopts high-impedance differential circuit, does not substantially have impact to the impedance in former loop;
(3) adopt highlighted numeral method electric current, voltage, operation interface is attractive in appearance, human nature is intelligent;
(4) mode adopting hummer difference to pipe provides field personnel, and protective device reliable ground is divided in simple zones whether;
(5) device adopts built-in high-capacity lithium battery, and after normally filling once electricity, the operational use time is long.
(6) whether lightning arrester Intelligent live access protective device can judge ground wire reliable ground intuitively, reliably; and by function prompt equipment access personnel such as numeral method ground current, voltage and buzzer warnings whether by temporary ground wire reliable ground; eliminate hidden danger, improve the safety coefficient of production.
(7) because current measuring range is larger, in order to better measure small area analysis signal, and ensure that the big current signal after amplifying does not exceed Chip Microcomputer A/D acquisition range, carry out two passages when circuit design to current signal to amplify, by the small area analysis magnify 20 of scope at 90uA ~ 500uA, by the Current amplifier 2 times of scope at 500uA ~ 5mA.
(8) for ensureing the accuracy of electric current and voltage measuring value, reduce the data fluctuations that external interference causes, program adopts when measuring and repeatedly reads electric current and voltage measuring value, the method be averaging after removing maximin.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of testing circuit in lightning arrester on-line monitoring Intelligent live of the present invention access protective device.
Fig. 2 is the front view of casing in lightning arrester on-line monitoring Intelligent live of the present invention access protective device.
Fig. 3 is the structural representation of casing inside ceiling panel in lightning arrester on-line monitoring Intelligent live of the present invention access protective device.
Fig. 4 is the schematic diagram of the access equipment under test of lightning arrester on-line monitoring Intelligent live of the present invention access protective device.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
The invention provides a kind of lightning arrester on-line monitoring Intelligent live access protective device, the testing circuit comprising a casing and be embedded in this casing, as shown in Figure 1, described testing circuit comprises a MCU control unit, by the electric energy metrical unit that spi bus is connected with described MCU control unit, the numeral method unit be connected with described MCU control unit, the power supply unit be connected with described MCU control unit, the signal lamp unit be connected with described MCU control unit, the hummer be connected with described MCU control unit, the operation amplifier unit be connected with described electric energy metrical unit, the difference amplifier unit be connected with described electric energy metrical unit, the Current Mutual Inductance unit be connected with described operation amplifier unit, the current measuring unit be connected with described current transformer and the voltage measurement unit be connected with described difference amplifier unit.
Further, in the present embodiment, described MCU control unit comprises a STM32 single-chip microcomputer.
Further, in the present embodiment, described electric energy metrical unit comprises an IDT90E36.
Further, in the present embodiment, described operation amplifier unit comprises an OPA2277, and described difference amplifier unit comprises an AMP03GS.
Further, in the present embodiment, described power supply unit comprises a 12V chargeable lithium cell.
Further, in the present embodiment, as shown in FIG. 2 and 3, the base 2 that described casing comprises a buckle closure 1 and mates with this buckle closure, described buckle closure and described base are locked by a pair lock body 3, and described testing circuit is embedded in described base 2, described base comprises a base plate, top board 4 and a side plate, described top board 4 offers the first through hole for being embedded voltage display screen 5 in described numeral method unit, for being embedded the second through hole of electric current display screen 6 in described numeral method unit, for being embedded the third through-hole of power light 7 in described signal lamp unit, for being embedded the fourth hole of the ground signalling pilot lamp 8 being used to indicate reliable ground in described signal lamp unit, for being embedded the fifth hole of alarm indicator 9 in described signal lamp unit, for being embedded the 6th through hole of line under-voltage pilot lamp 10 in described signal lamp unit, for being embedded the 7th through hole of power switch 11 in described power supply unit, for being embedded the 8th through hole of charging inlet 12 in described power supply unit, for being embedded the 9th through hole of the first voltage link post 13 in described voltage measurement unit, for being embedded the tenth through hole of the second voltage link post 14 in described voltage measurement unit, for being embedded the 11 through hole of the first electric current binding post 15 in described current measuring unit, for being embedded the 12 through hole of the second electric current binding post 16 in described current measuring unit.
Further, in the present embodiment, whole pick-up unit uses powered battery, and there are four joints outside, is respectively: voltage ﹢, voltage ﹣, electric current ﹢, electric current ﹣.Panel there are two group of four figures display tubes, show temporary ground wire both end voltage value and the current value flowing through temporary ground wire respectively; " power supply instruction " lamp; " reliable ground instruction " lamp; One " stand by lamp "; " line under-voltage " lamp; A power switch; A charge port.
Further, in the present embodiment, a kind of lightning arrester on-line monitoring Intelligent live is also provided to access the control method of protective device; there is provided a lightning arrester monitoring form meter 17, described lightning arrester monitoring form meter one end is connected with lightning arrester 18, other end ground connection; as shown in (a) in Fig. 4, comprise the steps:
Step S1: the power switch of opening power unit, make this lightning arrester on-line monitoring Intelligent live access protective device to power on, the voltage of lithium battery in power supply unit described in charactron meeting flickering display on voltage display screen in numeral method unit, displaying time is 5s, and in signal lamp unit, alarm indicator is bright; If the voltage of this lithium battery is within the scope of the first supply voltage, then in signal lamp unit, power light is bright, otherwise, described in state line under-voltage pilot lamp in signal lamp unit bright;
Step S2: the first voltage wiring terminal be connected with the first voltage link post in voltage measurement unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second voltage wiring terminal be connected with the second voltage link post in described voltage measurement unit is connected to ground, as shown in (b) in Fig. 4, and check voltage that described voltage display screen shows whether within the scope of detection voltage threshold, if, then go to step S3, otherwise, go to step S5;
Step S3: the first current wiring terminal be connected with the first electric current binding post in current measuring unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second current wiring terminal be connected with the second electric current binding post in described current measuring unit is connected to ground, as shown in (c) in Fig. 4, and check whether the electric current of the electric current display screen display in numeral method unit is detecting within the scope of current threshold, if, then go to step S4, otherwise, go to step S5;
Step S4: judge whether the voltage that described voltage display screen shows and the electric current measured by described lightning arrester monitoring form meter are 0, if, then hummer continuously and constant duration response, continuous sound 5 times, every minor tick 1s, the ground signalling pilot lamp in signal lamp unit is bright, described alarm indicator goes out, prompt facility access personnel's temporary ground wire reliable ground, equipment access personnel disconnect the connecting line of lightning arrester monitoring form meter and lightning arrester, can carry out the access of monitoring device; Otherwise, go to step S5;
Step S5: described alarm indicator is bright, and described hummer does not respond, prompt facility access personnel temporary ground wire does not have reliable ground.
Further, in the present embodiment, described first supply voltage scope is 10.8V ~ 20V; Described detection voltage threshold scope is different according to the concrete equipment in scene, and being a few volt ~ tens volt voltage, preferably, is 0V ~ 36V; Described detection current threshold scope is different according to the concrete equipment in scene, and different electric pressure is different, for hundreds of uA is to a few mA, preferably, is 0mA ~ 5mA.
Further, in the present embodiment, gathered current signal is carried out two passage amplifications by described operation amplifier unit, and by the small area analysis magnify 20 of range of current at 90uA ~ 500uA, by the Current amplifier 2 times of range of current at 500uA ~ 5mA.
Further, in the present embodiment, described MCU control unit when calculating voltage value or current value, by repeatedly reading current measurement value and voltage measuring value, and the method for averaging after removing maximal value and minimum value.
Further, in the present embodiment, lightning arrester monitoring form meter one end is connected to lightning arrester, and the other end is connected to the earth, not through punching mutual inductor.During lightning arrester on-line monitoring Intelligent live access protector measuring voltage, two measurement terminal are also connected to the two ends showing meter; When measuring electric current; two current measurement terminals are also connected to table meter two ends; now be equivalent to voltage measurement terminal by short circuit; therefore voltage measuring value is shown as 0; the electric current that current measurement value display is corresponding, in this case, lightning arrester on-line monitoring Intelligent live access protective device is judged as that temporary ground wire reliably connects; the line between lightning arrester monitoring form meter and lightning arrester can be disconnected, the required lightning arrester on-Line Monitor Device of installing of access.Lightning arrester monitoring form in respect of certain internal resistance, the corresponding certain magnitude of voltage in monitoring form meter two ends.The voltage terminal of lightning arrester Intelligent live access protective device is used to go to meter meter two ends, certain voltage can be measured, then two current wiring terminals of lightning arrester Intelligent live access protective device are received above monitoring form meter and ground respectively, because monitoring form meter two ends are shorted, two voltage is zero, the voltage displayed value strain of panel is 0, the leakage current of what electric current then showed is Zinc-Oxide Arrester, and the current indication now on monitoring form meter is zero, this state representation temporary ground wire reliable ground, reliable ground pilot lamp Chang Liang on panel, stand by lamp goes out, hummer cipher 5 times, field apparatus access personnel can disconnect the ground wire of former Zinc-Oxide Arrester and the operations such as access device.
Further, in the present embodiment, each pick-up unit asks timely powered-down, to ensure battery life after finishing using; Under default conditions, red " stand by lamp " is Chang Liang, and after only having ground wire reliable ground, red " stand by lamp " just extinguishes; When the line under-voltage lamp of device normal bright time, need, in time to device charging, to note: the charger charging by device standard configuration can only be used, otherwise may damage device.
Be more than preferred embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (10)
1. a lightning arrester on-line monitoring Intelligent live access protective device, is characterized in that, the testing circuit comprising a casing and be embedded in this casing, described testing circuit comprises a MCU control unit, by the electric energy metrical unit that spi bus is connected with described MCU control unit, the numeral method unit be connected with described MCU control unit, the power supply unit be connected with described MCU control unit, the signal lamp unit be connected with described MCU control unit, the hummer be connected with described MCU control unit, the operation amplifier unit be connected with described electric energy metrical unit, the difference amplifier unit be connected with described electric energy metrical unit, the Current Mutual Inductance unit be connected with described operation amplifier unit, the current measuring unit be connected with described current transformer and the voltage measurement unit be connected with described difference amplifier unit.
2. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 1, it is characterized in that, described MCU control unit comprises a STM32 single-chip microcomputer.
3. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 1, it is characterized in that, described electric energy metrical unit comprises an IDT90E36.
4. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 1, it is characterized in that, described operation amplifier unit comprises an OPA2277, and described difference amplifier unit comprises an AMP03GS.
5. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 1, it is characterized in that, described power supply unit comprises a 12V chargeable lithium cell.
6. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 1, it is characterized in that, the base that described casing comprises a buckle closure and mates with this buckle closure, described buckle closure and described base are locked by a pair lock body, and described testing circuit is embedded in described base, described base comprises a base plate, a top board and side plate, described top board offers the first through hole for being embedded voltage display screen in described numeral method unit, for being embedded the second through hole of electric current display screen in described numeral method unit, for being embedded the third through-hole of power light in described signal lamp unit, for being embedded the fourth hole of the ground signalling pilot lamp being used to indicate reliable ground in described signal lamp unit, for being embedded the fifth hole of alarm indicator in described signal lamp unit, for being embedded the 6th through hole of line under-voltage pilot lamp in described signal lamp unit, for being embedded the 7th through hole of power switch in described power supply unit, for being embedded the 8th through hole of charging inlet in described power supply unit, for being embedded the 9th through hole of the first voltage link post in described voltage measurement unit, for being embedded the tenth through hole of the second voltage link post in described voltage measurement unit, for being embedded the 11 through hole of the first electric current binding post in described current measuring unit, for being embedded the 12 through hole of the second electric current binding post in described current measuring unit.
7. the control method based on a kind of lightning arrester on-line monitoring Intelligent live access protective device described in claim 1 to 6; there is provided a lightning arrester monitoring form meter, described lightning arrester monitoring form meter one end is connected with lightning arrester, other end ground connection; it is characterized in that, comprise the steps:
Step S1: the power switch of opening power unit, make this lightning arrester on-line monitoring Intelligent live access protective device to power on, voltage display screen in numeral method unit shows the voltage of lithium battery in described power supply unit, and in signal lamp unit, alarm indicator is bright; If the voltage of this lithium battery is within the scope of the first supply voltage, then in signal lamp unit, power light is bright, otherwise, described in state line under-voltage pilot lamp in signal lamp unit bright;
Step S2: the first voltage wiring terminal be connected with the first voltage link post in voltage measurement unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second voltage wiring terminal be connected with the second voltage link post in described voltage measurement unit is connected to ground, and check voltage that described voltage display screen shows whether within the scope of detection voltage threshold, if, then go to step S3, otherwise, go to step S5;
Step S3: the first current wiring terminal be connected with the first electric current binding post in current measuring unit is connected between described lightning arrester monitoring form meter and lightning arrester, the second current wiring terminal be connected with the second electric current binding post in described current measuring unit is connected to ground, and check whether the electric current of the electric current display screen display in described numeral method unit is detecting within the scope of current threshold, if, then go to step S4, otherwise, go to step S5;
Step S4: judge whether the voltage that described voltage digitron display screen shows and the electric current measured by described lightning arrester monitoring form meter are 0, if, then hummer continuously and constant duration response, ground signalling pilot lamp in signal lamp unit is bright, described alarm indicator goes out, prompt facility access personnel's temporary ground wire reliable ground; Otherwise, go to step S5;
Step S5: described alarm indicator is bright, and described hummer does not respond, prompt facility access personnel temporary ground wire does not have reliable ground.
8. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 7, it is characterized in that, described first supply voltage scope is 10.8V ~ 20V; Described detection voltage threshold scope is: 0V ~ 36V; Described detection current threshold scope is 0mA ~ 5mA.
9. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 7; it is characterized in that; gathered current signal is carried out two passage amplifications by described operation amplifier unit; and by the small area analysis magnify 20 of range of current at 90uA ~ 500uA, by the Current amplifier 2 times of range of current at 500uA ~ 5mA.
10. a kind of lightning arrester on-line monitoring Intelligent live access protective device according to claim 7; it is characterized in that; described MCU control unit is when calculating voltage value or current value; by repeatedly reading current measurement value and voltage measuring value, and the method for averaging after removing maximal value and minimum value.
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| CN201610104869.XA CN105572517B (en) | 2016-02-26 | 2016-02-26 | A kind of arrester on-line monitoring Intelligent live access protective device and control method |
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| CN109085444B (en) * | 2018-08-08 | 2020-11-03 | 广东电网有限责任公司广州供电局 | Transfer box and lightning arrester detection device thereof |
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