CN213457105U - Voltage displacement indicator suitable for relay protection device calibration - Google Patents
Voltage displacement indicator suitable for relay protection device calibration Download PDFInfo
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- CN213457105U CN213457105U CN202022282837.3U CN202022282837U CN213457105U CN 213457105 U CN213457105 U CN 213457105U CN 202022282837 U CN202022282837 U CN 202022282837U CN 213457105 U CN213457105 U CN 213457105U
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- 238000006073 displacement reaction Methods 0.000 title claims description 19
- 230000005611 electricity Effects 0.000 claims abstract description 23
- 238000012795 verification Methods 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a voltage deflection indicator suitable for relay protection device calibration, which comprises a voltage acquisition circuit, an AD analog-to-digital converter, a DSP control module, a working indicator light, a display, a reset button and a working power supply; the working indicator light is divided into a positive electricity indicator light and a negative electricity indicator light; the display is divided into an initial state display screen, a middle state display screen and a final state display screen and is respectively used for displaying the initial voltage value of the pressing plate to be tested, the voltage value after the primary voltage is displaced and the voltage value after the secondary voltage is displaced. The utility model discloses can show twice voltage condition that shifts in succession to the instantaneous of voltage that can discern shifts, improved work efficiency, ensured the reliability of relay protection work.
Description
Technical Field
The utility model belongs to the technical field of electric power system control and protection and specifically relates to a voltage indicator that shifts suitable for relay protection device check-up.
Background
The displacement conditions of the upper and lower end voltages of the pressing plate are often required to be measured when the relay protection device of the transformer substation performs verification, safety measures are executed and recovered, and relay protection workers mostly adopt universal meter voltage gears to measure the upper and lower end voltages of the pressing plate at present so as to observe the displacement conditions of the upper and lower end voltages of the pressing plate.
However, the closing time of the action outlet node of some protection devices is very short, and the multimeter cannot quickly identify and respond to instantaneous voltage deflection, so that a tester cannot accurately identify a test result. The protective screen is provided with more than ten to dozens of pressing plates, each pressing plate is provided with an upper point and a lower point to be observed, when the pressing plates to be observed are more, the situation that the voltage deflection is not easy to identify needs to be repeatedly observed by workers, and the situation brings great trouble to relay protection workers.
When the protection device is checked and the precision is checked, the breaker switch needs to be driven in each simulation, the action times of the switch are obviously increased, and for some switches with longer running time, the switches are switched on and off for many times in a short time during testing, so that the switches are easily damaged. The power failure maintenance time is too long, the power supply reliability is reduced, and the operation and maintenance cost of a company is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to remedy prior art's weak point, provide a voltage indicator that shifts suitable for relay protection device check-up, it can show twice voltage condition that shifts in succession to can discern the instantaneous of voltage and shift, improved work efficiency, ensured the reliability of relay protection work.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a voltage deflection indicator suitable for relay protection device calibration comprises a voltage acquisition circuit, an AD (analog-to-digital) converter, a DSP (digital signal processor) control module, a working indicator lamp, a display, a reset button and a working power supply;
the input end of the voltage acquisition circuit is connected with the pressure plate to be tested, the output end of the voltage acquisition circuit is connected with the input end of the DSP control module through the AD analog-to-digital converter, the voltage acquisition circuit is used for acquiring the voltage of the pressure plate to be tested in real time and outputting a current signal, and the current signal is transmitted to the DSP control module after being converted by the AD analog-to-digital converter;
the output end of the DSP control module is also respectively connected with the working indicator light and the display, so as to control the on-off of the working indicator light and the numerical value display of the display;
the working indicator lamp is divided into a positive electricity indicator lamp and a negative electricity indicator lamp which have different light-emitting colors, wherein the positive electricity indicator lamp is lightened when the voltage of the pressure plate to be detected is positive, and the negative electricity indicator lamp is lightened when the voltage of the pressure plate to be detected is negative;
the display is divided into an initial state display screen, a middle state display screen and a final state display screen, wherein the initial state display screen is used for displaying an initial voltage value of the pressing plate to be tested, the middle state display screen is used for displaying a voltage value of the pressing plate to be tested after primary voltage displacement, and the final state display screen is used for displaying a voltage value of the pressing plate to be tested after secondary voltage displacement;
the reset button is connected with the input end of the DSP control module and is used for controlling the display to reset through the DSP control module;
the working power supply is used for supplying power for the AD analog-to-digital converter, the DSP control module, the working indicator lamp and the display.
Furthermore, after the voltage collected by the voltage collecting circuit is subjected to resistance voltage division and capacitance filtering, only a direct current voltage with a certain proportion is collected, and the output end of the voltage collecting circuit is also provided with a clamping diode so as to clamp the voltage within 3.3V.
Further, the AD analog-to-digital converter is a 24-bit AD analog-to-digital converter.
Further, when the voltage of the pressure plate to be measured is more than +30V, the positive electricity indicating lamp is turned on to be red; when the voltage of the pressure plate to be tested is less than-30V, the negative electricity indicator lamp is lightened to be green; when the voltage of the pressure plate to be measured is between-30V and +30V, the positive electricity indicator lamp and the negative electricity indicator lamp are not lightened.
The utility model has the advantages that: the utility model discloses can the quick discernment voltage shift and have the function that the record voltage shifted the process, mainly used relay protection device check-up, safety measure carry out with the time keeping watch on the clamp plate voltage displacement condition of resumeing, man-machine interaction mode has simply been clear, has ensured observation operation and test result that can be accurate to and can realize needn't verify at every turn that the tripping operation export is all to take the driven purpose of switch. The function that current instrument can not realize has been realized, has made things convenient for relay protection staff daily work, improves work efficiency, ensures relay protection work's reliability.
Drawings
Fig. 1 is a schematic external structural view of the present invention;
fig. 2 is a block diagram of the hardware connection structure of the present invention;
fig. 3 is a circuit diagram of the medium voltage acquisition circuit of the present invention;
fig. 4 is a flow chart of the main program of the present invention;
fig. 5 is a flow chart of the middle voltage sampling procedure of the present invention;
FIG. 6 is a flow chart of a voltage shift identification procedure according to the present invention;
fig. 7 is a flowchart of a control program of the pilot lamp in the middle work of the present invention.
Wherein, 1-an initial state display screen, 2-a middle state display screen, 3-a final state display screen, 4-a positive electricity indicator light, 5-a negative electricity indicator light and 6-a reset button.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1 to fig. 3, the utility model discloses a voltage indicator that shifts suitable for relay protection device check-up includes voltage acquisition circuit, AD analog to digital converter (AD analog to digital converter is preferred 24 AD analog to digital converters), DSP control module, work pilot lamp, display, reset button 6 and working power supply.
As shown in fig. 2, the input end of the voltage acquisition circuit is connected with the pressure plate to be measured, the output end of the voltage acquisition circuit is connected with the input end of the DSP control module through the AD analog-to-digital converter, the voltage acquisition circuit is used for acquiring the voltage of the pressure plate to be measured in real time and outputting a current signal, and the current signal is transmitted to the DSP control module after being converted by the AD analog-to-digital converter; the output end of the DSP control module is also respectively connected with the working indicator light and the display, so as to control the on-off of the working indicator light and the numerical value display of the display; the reset button 6 is connected with the input end of the DSP control module and is used for controlling the display to reset through the DSP control module; the working power supply is used for supplying power for the AD analog-to-digital converter and the DSP control module, and the working indicator lamp and the display obtain electric energy from the working power supply through the DSP control module. In addition, the voltage deflection indicator of the present invention realizes various functions under the control of the main program shown in fig. 4.
As shown in fig. 3, a circuit diagram of a voltage acquisition circuit is shown. The direct current voltage to be measured in the transformer substation is generally divided into two voltage levels of 110V and 220V, the voltage value is high, the withstand current of a voltage acquisition circuit of the direct current voltage is very small, and therefore after voltage input is adopted and subjected to resistance voltage division and capacitance filtering, only a certain proportion of direct current voltage is acquired, so that the measurement precision is not influenced, and meanwhile, the safety of devices is guaranteed. The output signal of the voltage acquisition circuit is an accurate current signal, and meanwhile, a clamping diode is added at the output end, so that the voltage can be clamped within 3.3V. In addition, the voltage acquisition circuit realizes the voltage acquisition function under the control of the voltage sampling program shown in fig. 5.
As shown in fig. 1, the display, the work indicator light and the reset button are integrated outside the voltage displacement indicator of the present invention; the display comprises an initial state display screen 1, a middle state display screen 2 and a final state display screen 3, wherein the initial state display screen 1 is used for displaying an initial voltage value of a pressing plate to be tested, the middle state display screen 2 is used for displaying a voltage value of the pressing plate to be tested after primary voltage displacement, and the final state display screen 3 is used for displaying a voltage value of the pressing plate to be tested after secondary voltage displacement; the operation indicator lamps include a red positive electric indicator lamp 4 and a green negative electric indicator lamp 5. When the voltage deflection indicator is used, the lower end test wire of the voltage deflection indicator is grounded, the upper end test wire is connected with a pressing plate needing to observe voltage deflection, the reset button 6 is pressed after the voltage deflection indicator is connected, the voltage deflection indicator is in an initial state, and the reset button is pressed every time the voltage deflection condition is measured.
Control system of transformer substation adopts DC power supply, and voltage generally has two kinds of specification direct currents 110V and direct current 220V, the utility model discloses in get the 30V voltage margin that shifts, prevented that slight voltage fluctuation from leading to the mistake or frequently discerning the voltage and shifting. A red positive indicator light is on when the platen voltage is positive (greater than +30V to ground); a green negative electricity indicator light is on when the pressure plate voltage is negative (less than-30V to ground); when the pressure plate voltage is between-30V and 30V, all the working indicator lamps are not lighted.
The common voltage displacement situation, the display data and the working indicator light situation are illustrated as follows:
1. the initial state voltage is 0, the initial state display screen displays 0 (the working indicator lamp is not on), the program does not enter the intermediate state and the final state, and the intermediate state display screen and the final state display screen do not display (the working indicator lamp is not on).
2. The initial state voltage is 0, and the intermediate state voltage is more than + 30V. The initial state display screen displays 0 (the working indicator lamps are not on), the intermediate state display screen displays a positive voltage value (the red positive indicator lamps are on), the program does not enter the final state, and the final state display screen does not display.
3. The initial state voltage is greater than +30V, the intermediate state voltage is 0, and the final state voltage is less than-30V. The initial state display screen displays a positive voltage value (a red positive electricity indicator lamp is on), the middle state display screen displays 0 (a working indicator lamp is not on), and the final state display screen displays a negative voltage value (a green negative electricity indicator lamp is on).
The display displays data under the control of the voltage displacement identification program shown in fig. 6, and the work indicator lamp operates under the control of the work indicator lamp control program shown in fig. 7.
The voltage displacement indicator can sequentially display the voltage displacement conditions on the three display screens, and can continuously display the voltage displacement conditions twice, so that the instantaneous displacement of the voltage can be identified and displayed.
And a tripping outlet is formed during the checking and precision verification of the protection device, namely, the positive power supply and the negative power supply are connected by closing an outlet node of the protection device, so that the purpose of tripping is achieved. When the tripping pressure plate is opened, the tripping outlet of the protection device shows the displacement of the voltage at the lower end of the pressure plate. Consequently, the voltage based on the voltage indicator that shifts discernment principle, the utility model discloses whether still can be applied to the tripping operation export node that protection device corresponds when verifying protection device inspection and precision check-up and closed, reach and unnecessarily verify that the tripping operation export all needs take the driven purpose of switch at every turn, prolonged the life of switch.
In summary, the present invention is not limited to the above embodiments, and those skilled in the art can provide other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.
Claims (4)
1. A voltage deflection indicator suitable for relay protection device calibration is characterized by comprising a voltage acquisition circuit, an AD (analog-to-digital) converter, a DSP (digital signal processor) control module, a working indicator lamp, a display, a reset button and a working power supply;
the input end of the voltage acquisition circuit is connected with the pressure plate to be tested, the output end of the voltage acquisition circuit is connected with the input end of the DSP control module through the AD analog-to-digital converter, the voltage acquisition circuit is used for acquiring the voltage of the pressure plate to be tested in real time and outputting a current signal, and the current signal is transmitted to the DSP control module after being converted by the AD analog-to-digital converter;
the output end of the DSP control module is also respectively connected with the working indicator light and the display, so as to control the on-off of the working indicator light and the numerical value display of the display;
the working indicator lamp is divided into a positive electricity indicator lamp and a negative electricity indicator lamp which have different light-emitting colors, wherein the positive electricity indicator lamp is lightened when the voltage of the pressure plate to be detected is positive, and the negative electricity indicator lamp is lightened when the voltage of the pressure plate to be detected is negative;
the display is divided into an initial state display screen, a middle state display screen and a final state display screen, wherein the initial state display screen is used for displaying an initial voltage value of the pressing plate to be tested, the middle state display screen is used for displaying a voltage value of the pressing plate to be tested after primary voltage displacement, and the final state display screen is used for displaying a voltage value of the pressing plate to be tested after secondary voltage displacement;
the reset button is connected with the input end of the DSP control module and is used for controlling the display to reset through the DSP control module;
the working power supply is used for supplying power for the AD analog-to-digital converter, the DSP control module, the working indicator lamp and the display.
2. The voltage shift indicator suitable for relay protection device calibration of claim 1, wherein the voltage collected by the voltage collection circuit is divided by a resistor and filtered by a capacitor, and then only a certain proportion of dc voltage is collected, and the output terminal of the voltage collection circuit is further provided with a clamping diode to clamp the voltage within 3.3V.
3. The voltage shift indicator suitable for being used in relay protection device verification according to claim 1, wherein the AD converter is a 24-bit AD converter.
4. The voltage shift indicator suitable for relay protection device calibration of claim 1, wherein when the voltage of the pressure plate to be tested is greater than +30V, the positive electricity indicator light is turned on to be red; when the voltage of the pressure plate to be tested is less than-30V, the negative electricity indicator lamp is lightened to be green; when the voltage of the pressure plate to be measured is between-30V and +30V, the positive electricity indicator lamp and the negative electricity indicator lamp are not lightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022282837.3U CN213457105U (en) | 2020-10-14 | 2020-10-14 | Voltage displacement indicator suitable for relay protection device calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022282837.3U CN213457105U (en) | 2020-10-14 | 2020-10-14 | Voltage displacement indicator suitable for relay protection device calibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213457105U true CN213457105U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022282837.3U Active CN213457105U (en) | 2020-10-14 | 2020-10-14 | Voltage displacement indicator suitable for relay protection device calibration |
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| CN (1) | CN213457105U (en) |
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- 2020-10-14 CN CN202022282837.3U patent/CN213457105U/en active Active
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