CN114089163A - Equipment state detection circuit and equipment state detection device - Google Patents
Equipment state detection circuit and equipment state detection device Download PDFInfo
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- CN114089163A CN114089163A CN202111391421.8A CN202111391421A CN114089163A CN 114089163 A CN114089163 A CN 114089163A CN 202111391421 A CN202111391421 A CN 202111391421A CN 114089163 A CN114089163 A CN 114089163A
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- 238000001514 detection method Methods 0.000 title claims abstract description 79
- 238000006243 chemical reaction Methods 0.000 claims description 68
- 238000012790 confirmation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2827—Testing of electronic protection circuits
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the invention discloses an equipment state detection circuit and an equipment state detection device. The device state detection circuit includes: the device comprises a first current input end, a second current input end and at least two detection branches; each detection branch comprises: the device comprises a first current output end, a second current output end and an indicating module; the first current input end and the second current input end are used for inputting detection current, the first current output end is electrically connected with the first current input end, the second current output end is electrically connected with the first end of the corresponding indicating module, and the second end of the indicating module is electrically connected with the second current input end; the first current output end and the corresponding second current output end are used for being electrically connected with equipment to be detected, and the indicating module is used for sending out an indicating signal according to flowing current. The problem that manual repeated searching and confirmation lead to long time consumption and low working efficiency due to the fact that wiring disconnection points are hidden is solved, the positions of the disconnection points are quickly searched, and debugging efficiency and accuracy are improved.
Description
Technical Field
The embodiment of the invention relates to a power relay protection technology, in particular to an equipment state detection circuit and an equipment state detection device.
Background
With the upgrading of the electric automatic relay protection, the protection coordination of a plurality of switches on the circuit becomes the trend of distribution network circuit relay protection configuration, the increasingly complex network frame and the protection function are upgraded, the coordination requirement on the distribution network relay protection switch is stricter, the corresponding acceptance and debugging requirements are more complex, and in order to meet the increasingly fine protection debugging requirements (such as intelligent distribution and voltage current type) of the distribution network plurality of switches, a group of feeder lines and the plurality of switches are required to be simultaneously matched for up-flow debugging, faults are simulated, and fault removal actions are simulated. The current debugging mode has one-time current rise, but the method needs a large-current generator and complex wire changing, the debugging process is long, the realized large current is limited, and certain dangers exist; the secondary simulation is adopted, however, the wiring of the method is complex, the situation of current removal by fault action can be realized only through the simulation of time sequence, and the condition of hidden functional errors in the debugging process is difficult to find.
When equipment is debugged, a relay is required to be connected into each protection terminal current terminal, and in an analog current loop, each piece of equipment is required to be connected into the loop in series, so that the wiring of the equipment is complicated and is easy to make mistakes. In the debugging process, the reason causes the wiring to become flexible because of reasons such as wiring is mixed and disorderly, artificial error often, and the return circuit broken string leads to rising to flow the failure, and the failure test result can not satisfy the test requirement. The wiring disconnection point is hidden, manual repeated searching and confirmation and upwelling test confirmation are needed, the consumed time is long, and the working efficiency is low. When a fault is simulated, the switching action condition cannot be fed back immediately due to secondary upflow and boosting, the switching state can only be simulated by the continuous upflow state of the relay protection instrument, and when the switching abnormal action condition occurs, the actual condition cannot be fed back really due to the fact that the upflow state cannot be changed, and the equipment debugging result is distorted.
Disclosure of Invention
The invention provides an invention name, which can accurately finish debugging and acceptance, is convenient and quick in wiring, can quickly find the position of a breaking point, and improves the debugging efficiency and accuracy.
In a first aspect, an embodiment of the present invention provides a device status detection circuit, where the device status detection circuit includes:
the device comprises a first current input end, a second current input end and at least two detection branches; each of the detection branches includes: the device comprises a first current output end, a second current output end and an indicating module;
the first current input end and the second current input end are used for inputting detection current, the first current output end is electrically connected with the first current input end, the second current output end is electrically connected with the first end of the corresponding indicating module, and the second end of the indicating module is electrically connected with the second current input end; the first current output end and the corresponding second current output end are used for being electrically connected with equipment to be detected, and the indicating module is used for sending out an indicating signal according to flowing current.
Optionally, the detection branch further includes: and the second current output end is electrically connected with the first end of the corresponding indicating module through the line switch.
Optionally, the indication module comprises a buzzer and/or an indicator light.
Optionally, the device status detection circuit further includes:
the power supply and the at least two control branches correspond to the at least two detection branches one to one; each control branch comprises a relay coil, a signal input end and a polarity conversion module;
the first end of the power supply is electrically connected with the first input end of the polarity conversion module, the second end of the power supply is electrically connected with the second input end of the polarity conversion module, the first output end of the polarity conversion module is electrically connected with the first end of the corresponding relay coil, and the second output end of the polarity conversion module is electrically connected with the second end of the corresponding relay coil;
the polarity conversion module is configured to electrically connect a first end of the power supply with a first end of the corresponding relay coil and electrically connect a second end of the power supply with a second end of the corresponding relay coil when a control signal is input at the corresponding signal input terminal;
the equipment state detection circuit further comprises relay switches in one-to-one correspondence with the relay coils, and the first current input end is electrically connected with the corresponding first current output end through the corresponding relay switches.
Optionally, the device status detection circuit further includes a main switch, and the first end of the power supply is electrically connected to the first input end of the polarity conversion module through the main switch.
Optionally, the polarity conversion module includes: a first signal switch and a second signal switch;
the first end of the first signal switch is electrically connected with the first input end of the polarity conversion module, the second end of the first signal switch is electrically connected with the first output end of the polarity conversion module, and the control end of the first signal switch is electrically connected with the corresponding signal input end;
the first end of the second signal switch is electrically connected with the second input end of the polarity conversion module, the second end of the second signal switch is electrically connected with the second output end of the polarity conversion module, and the control end of the second signal switch is electrically connected with the corresponding signal input end.
Optionally, the polarity conversion module further comprises a reset switch, and the reset switch is configured to electrically connect the first input end of the polarity conversion module and the second output end of the polarity conversion module when being turned on, and electrically connect the second input end of the polarity conversion module and the first output end of the polarity conversion module.
Optionally, the reset switch comprises a first reset sub-switch and a second reset sub-switch;
a first end of the first reset sub-switch is electrically connected with a first input end of the polarity conversion module, and a second end of the first reset sub-switch is electrically connected with a second output end of the polarity conversion module;
the first end of the second reset sub-switch is electrically connected with the second input end of the polarity conversion module, and the second end of the second reset sub-switch is electrically connected with the first input end of the polarity conversion module.
In a second aspect, an embodiment of the present invention further provides an apparatus state detection device, where the apparatus state detection device includes a casing and the apparatus state detection circuit provided in any embodiment of the present invention, and the casing exposes the first current input terminal, the second current input terminal, the first current output terminal, the second current output terminal, and the indication module.
Optionally, the first current input, the second current input, the first current output, the second current output and the indication module are located on the same surface of the housing.
In the embodiment, multiple wiring is avoided by integrating the wiring terminals, all the open circuit conditions are intensively fed back to the indicating module, the manually searched open circuit points at multiple positions are converted into visible indicating signals by the indicating module, and the open/close conditions of the loop can be judged by checking through the indicating module; the problem of prior art because of the wiring broken line point is hidden, need artifical to look for repeatedly and confirm and lead to long consuming time, work efficiency low is solved to realize looking for the position of broken line point fast, improve the efficiency and the accuracy of debugging.
Drawings
Fig. 1 is a schematic diagram of a device status detection circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a device status detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus state detection device according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic diagram of an apparatus state detection circuit according to an embodiment of the present invention, where this embodiment is applicable to monitoring a state of an apparatus to be tested, and referring to fig. 1, an embodiment of the present invention provides an apparatus state detection circuit, where the apparatus state detection circuit includes: a first current input terminal In1, a second current input terminal In2 and at least two detection branches; each detection branch comprises: a first current output Out1, a second current output Out2, and an indication module 10.
The first current input end In1 and the second current input end In2 are used for inputting detection current, the first current output end Out1 is electrically connected with the first current input end In1, the second current output end Out2 is electrically connected with the first end of the corresponding indicating module 10, and the second end of the indicating module 10 is electrically connected with the second current input end In 2; the first current output end Out1 and the corresponding second current output end Out2 are used for being electrically connected with a device to be detected, and the indicating module 10 is used for sending Out an indicating signal according to the flowing current.
In this embodiment, a detection branch 1 is taken as an example for explanation, specifically, when debugging a device, a current signal is input through a first current input terminal In1 and is connected to a head end of a device to be tested through a first current output terminal Out1, the tail end of the device to be tested is connected to a second current output terminal Out2, the second current output terminal Out2 is electrically connected to a first terminal of an indication module 10, and a second terminal of the indication module 10 is electrically connected to a second current input terminal In2 to form a current loop. When the loop is normally connected, the indicating module 10 sends an indicating signal in a normal state; when the circuit is open, the indication module 10 signals an abnormal condition. When a plurality of devices to be detected are connected in series, each detection branch is connected one by one, and the circuit unit in which the circuit breakpoint is positioned can be judged. The principle of the detection branch 2 is the same as above, and is not described in detail.
It should be noted that the device state detection circuit includes at least two detection branches, which means that the number of the detection branches may be two or more, and the specific number of the detection branches is not limited in the embodiment of the present invention, and may be set according to actual detection needs.
In the embodiment, multiple wiring is avoided by integrating the wiring terminals, all the open circuit conditions are intensively fed back to the indicating module, the manually searched open circuit points at multiple positions are converted into visible indicating signals by the indicating module, and the open/close conditions of the loop can be judged by checking through the indicating module; the problem of prior art because of the wiring broken line point is hidden, need artifical to look for repeatedly and confirm and lead to long consuming time, work efficiency low is solved to realize looking for the position of broken line point fast, improve the efficiency and the accuracy of debugging.
Optionally, the detection branch further comprises: and the second current output end is electrically connected with the first end of the corresponding indicating module through the line switch.
The number of the series switches is controlled through the on-off position of the circuit switch, so that multi-path current input can be accommodated, and the input of multi-power current is completed; when a plurality of detection branches are debugged simultaneously, the on-off of each detection branch can be flexibly controlled by setting the line switch. The line switch can be switched on or off as required, so that a single detection branch can be debugged, and all serially connected detection branches can be debugged.
Optionally, the indication module comprises a buzzer and/or an indicator light.
The indicating module can be a buzzer, and when the loop is normally connected, the buzzer sounds one sound and then does not sound; when the loop is disconnected, the buzzer makes a sound all the time; the indicating module can also be an indicating lamp, and when the loop is normally connected, the indicating lamp is normally on; when the loop is disconnected, the signal indicator lamp is turned off.
Fig. 2 is a circuit diagram of a device status detection circuit according to an embodiment of the present invention, and referring to fig. 2, optionally, the device status detection circuit further includes:
the power supply and the at least two control branches correspond to the at least two detection branches one to one; each control branch comprises a relay coil, a signal input end and a polarity conversion module;
the first end of the power supply is electrically connected with the first input end of the polarity conversion module, the second end of the power supply is electrically connected with the second input end of the polarity conversion module, the first output end of the polarity conversion module is electrically connected with the first end of the corresponding relay coil, and the second output end of the polarity conversion module is electrically connected with the second end of the corresponding relay coil;
the polarity conversion module is configured to electrically connect a first end of the power supply with a first end of the corresponding relay coil and electrically connect a second end of the power supply with a second end of the corresponding relay coil when the corresponding signal input terminal inputs the control signal;
The equipment state detection circuit further comprises relay switches in one-to-one correspondence with the relay coils, and the first current input ends are electrically connected with the corresponding first current output ends through the corresponding relay switches.
Specifically, when a fault is simulated, the fault test current controls the number of series switches through the on-off position of a circuit switch according to a simulated fault position point, can accommodate multi-path current input, and completes the input of multi-power current; when the loop is connected, the signal indicator lamp is normally on, which represents that the wiring of the line is normal; when the current connected to the current input end is continuously increased, the current is increased to a specific protection action value, when the current is increased to a certain value, the device to be tested performs protection action, namely automatic short circuit, and the device to be tested outputs a signal which can be transmitted to the signal input end, so that the relay coil KA1 acts to control the switch KA1 of the relay to disconnect a loop, and the device to be tested is separated from the current loop. The current loop is cut off, the indicator light goes out, the process of cutting off the fault current by the action of the equipment to be detected is truly and visually reflected, the switch protection action process is converted into the signal indication and goes out, the looped network is connected into the automatic switch, a plurality of switches are required to be debugged simultaneously, and then the branches such as the detection branch 2 and the detection branch 3 are connected one by one, so that the multi-switch series connection access scene simulation is realized. The relay controls the on-off of the internal wiring, the simulation of the cutting action of the fault current is completed, the action condition is protected when the real fault is simulated, the action accuracy of the protection equipment is accurately judged, and the simulation acceptance work of the protection strategy is efficiently completed.
With continued reference to fig. 2, optionally, the device status detection circuit further includes a main switch S1, and the first terminal of the power supply is electrically connected to the first input terminal of the polarity conversion module through the main switch S1.
When the main switch S1 is closed, the first end of the power supply is electrically connected to the first input end of the polarity conversion module through the main switch S1, so as to supply power to the polarity conversion module. After debugging is finished, the main switch S1 is switched off, and power is not supplied to the polarity conversion module.
With continuing reference to fig. 2, optionally, the polarity conversion module includes: a first signal switch 1 and a second signal switch 4;
the first end of the first signal switch 1 is electrically connected with the first input end of the polarity conversion module, the second end of the first signal switch 1 is electrically connected with the first output end of the polarity conversion module, and the control end of the first signal switch 1 is electrically connected with the corresponding signal input end;
the first end of the second signal switch 4 is electrically connected with the second input end of the polarity conversion module, the second end of the second signal switch 4 is electrically connected with the second output end of the polarity conversion module, and the control end of the second signal switch 4 is electrically connected with the corresponding signal input end.
When the current rises to a specific protection action value, the automatic short-circuit protection action of the equipment to be tested is started, the equipment to be tested outputs a signal to the signal input end, the control end of the first signal switch 1 and the control end of the second signal switch 4 are electrically connected with the corresponding signal input ends, at the moment, the first signal switch 1 and the second signal switch 4 are closed, so that the relay coil KA1 acts, the switch KA1 of the relay is controlled to break a loop, and the equipment to be tested is separated from the current loop.
Optionally, the polarity conversion module further comprises a reset switch configured to electrically connect the first input terminal of the polarity conversion module with the second output terminal of the polarity conversion module and to electrically connect the second input terminal of the polarity conversion module with the first output terminal of the polarity conversion module when turned on.
The first input end and the second output end of the polarity conversion module are electrically connected through the reset switch, the second input end is electrically connected with the first output end, and polarity reversal connection is achieved, so that the current flow direction is changed, a reverse power supply does not need to be additionally provided, the circuit is simplified, and the cost is reduced.
With continued reference to fig. 2, optionally, the reset switch comprises a first reset sub-switch 2 and a second reset sub-switch 3;
a first end of the first reset sub-switch 2 is electrically connected with a first input end of the polarity conversion module, and a second end of the first reset sub-switch 2 is electrically connected with a second output end of the polarity conversion module;
the first end of the second reset sub-switch 3 is electrically connected with the second input end of the polarity conversion module, and the second end of the second reset sub-switch 3 is electrically connected with the first input end of the polarity conversion module.
After the simulation fault is finished, the reset action can be completed through the first reset sub-switch 2 and the second reset sub-switch 3. When the reset is needed, the first reset sub-switch 2 and the second reset sub-switch 3 are both closed, the current sequentially passes through the first input end, the second output end, the second input end and the first output end of the polarity conversion module, the current flowing through the relay coil KA1 is small and cannot reach the action condition, the switch KA1 of the relay is still disconnected, and the reset is completed.
Example two
Fig. 3 is a schematic structural diagram of an apparatus state detection device according to a second embodiment of the present invention, and referring to fig. 3, an apparatus state detection device according to a second embodiment of the present invention is further provided, where the apparatus state detection device includes a housing 20 and an apparatus state detection circuit according to any embodiment of the present invention, and the housing exposes a first current input terminal In1, a second current input terminal In2, a first current output terminal Out1, a second current output terminal Out2, and an indication module 10.
Since the device state detection apparatus includes the device state detection circuit provided in any embodiment of the present invention, the beneficial effects of the device state detection apparatus and the device state detection circuit are the same, and are not described herein again.
Optionally, the first current input terminal In1, the second current input terminal In2, the first current output terminal Out1, the second current output terminal Out2 and the indication module 10 are located on the same surface of the housing 20.
In the embodiment of the invention, the first current input end In1, the second current input end In2, the first current output end Out1, the second current output end Out2 and the indicating module 10 are arranged on the same surface of the shell 20, and the fault display of the indicating module 10 is used for analyzing and judging the position of the fault and the reason of the fault, so that the fault troubleshooting time can be shortened, and the debugging efficiency and accuracy are improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A device state detection circuit, the device state detection circuit comprising:
the device comprises a first current input end, a second current input end and at least two detection branches; each of the detection branches includes: the device comprises a first current output end, a second current output end and an indicating module;
the first current input end and the second current input end are used for inputting detection current, the first current output end is electrically connected with the first current input end, the second current output end is electrically connected with the first end of the corresponding indicating module, and the second end of the indicating module is electrically connected with the second current input end; the first current output end and the corresponding second current output end are used for being electrically connected with equipment to be detected, and the indicating module is used for sending out an indicating signal according to flowing current.
2. The device state detection circuit of claim 1, wherein the detection branch further comprises: and the second current output end is electrically connected with the first end of the corresponding indicating module through the line switch.
3. The device status detection circuit according to claim 1, wherein the indication module comprises a buzzer and/or an indicator light.
4. The device state detection circuit of claim 1, further comprising:
the power supply and the at least two control branches correspond to the at least two detection branches one to one; each control branch comprises a relay coil, a signal input end and a polarity conversion module;
the first end of the power supply is electrically connected with the first input end of the polarity conversion module, the second end of the power supply is electrically connected with the second input end of the polarity conversion module, the first output end of the polarity conversion module is electrically connected with the first end of the corresponding relay coil, and the second output end of the polarity conversion module is electrically connected with the second end of the corresponding relay coil;
the polarity conversion module is configured to electrically connect a first end of the power supply with a first end of the corresponding relay coil and electrically connect a second end of the power supply with a second end of the corresponding relay coil when a control signal is input at the corresponding signal input terminal;
The equipment state detection circuit further comprises relay switches in one-to-one correspondence with the relay coils, and the first current input end is electrically connected with the corresponding first current output end through the corresponding relay switches.
5. The device status detection circuit according to claim 4, further comprising a main switch, wherein the first terminal of the power supply is electrically connected to the first input terminal of the polarity conversion module through the main switch.
6. The device state detection circuit of claim 4, wherein the polarity conversion module comprises: a first signal switch and a second signal switch;
the first end of the first signal switch is electrically connected with the first input end of the polarity conversion module, the second end of the first signal switch is electrically connected with the first output end of the polarity conversion module, and the control end of the first signal switch is electrically connected with the corresponding signal input end;
the first end of the second signal switch is electrically connected with the second input end of the polarity conversion module, the second end of the second signal switch is electrically connected with the second output end of the polarity conversion module, and the control end of the second signal switch is electrically connected with the corresponding signal input end.
7. The device state detection circuit of claim 4, wherein the polarity conversion module further comprises a reset switch configured to electrically connect the first input of the polarity conversion module with the second output of the polarity conversion module and to electrically connect the second input of the polarity conversion module with the first output of the polarity conversion module when turned on.
8. The device state detection circuit of claim 7, wherein the reset switch comprises a first reset sub-switch and a second reset sub-switch;
a first end of the first reset sub-switch is electrically connected with a first input end of the polarity conversion module, and a second end of the first reset sub-switch is electrically connected with a second output end of the polarity conversion module;
the first end of the second reset sub-switch is electrically connected with the second input end of the polarity conversion module, and the second end of the second reset sub-switch is electrically connected with the first input end of the polarity conversion module.
9. An equipment state detection device, comprising a housing and the equipment state detection circuit of any one of claims 1-8, wherein the housing exposes the first current input, the second current input, the first current output, the second current output, and the indication module.
10. The device status detecting apparatus according to claim 9, wherein the first current input terminal, the second current input terminal, the first current output terminal, the second current output terminal, and the indicating module are located on a same surface of the housing.
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| CN202111391421.8A CN114089163B (en) | 2021-11-23 | 2021-11-23 | Equipment state detection circuit and equipment state detection device |
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