CN210894557U - Transformer substation cable core checking and measuring instrument - Google Patents
Transformer substation cable core checking and measuring instrument Download PDFInfo
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- CN210894557U CN210894557U CN201921135522.7U CN201921135522U CN210894557U CN 210894557 U CN210894557 U CN 210894557U CN 201921135522 U CN201921135522 U CN 201921135522U CN 210894557 U CN210894557 U CN 210894557U
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Abstract
The utility model discloses a transformer substation cable core checking and measuring instrument, which comprises a central processing module, a voltage measuring module and an on-off measuring module, wherein the voltage measuring module is used for measuring the voltage of a secondary loop and is electrically connected with the central processing module; the on-off measuring module is provided with a host mode and a slave mode, the host mode is used for measuring the band point condition of the cable core, the slave mode is used for matching with the host to complete checking work on the cable core, and the on-off measuring module is electrically connected with the central processing module. The utility model has the advantages that: 1. the cable checking system has two different working modes, namely a master mode and a slave mode, and the cable is checked according to different conditions; 2. the safety production level is improved, and the serious consequences of misoperation of electrical elements, power grounding and the like caused by mistakenly touching the electrified loop when the secondary loop is subjected to on-off test in an operating transformer substation are successfully solved.
Description
Technical Field
The utility model relates to a transformer substation's control field, more specifically relates to a measuring apparatu is checked to transformer substation's cable core.
Background
At present, a secondary circuit in a conventional substation of an electric power system consists of a large number of cables and wires with different models. Along with the rapid development of a power grid, the power consumption requirement of a user is higher and higher, so that extension and technical improvement projects in a related operating transformer substation are gradually increased, the secondary circuit on-off measurement work such as checking a cable core of a secondary circuit of the transformer substation, confirming the state of an outlet node of a protection device and the like is a crucial and indispensable link, and a universal meter is a most common safety tool for on-off measurement of the secondary circuit in the current power work.
The working modes of secondary loop on-off measurement are mainly divided into two types: first, short-range loop measurements. Applying a universal meter on-off gear, enabling a red meter pen to be opposite to the head end of the loop, enabling a black meter pen to be opposite to the tail end of the loop, and enabling the loop to be conducted if a buzzer rings; second, long range loop measurement. The main tool is a universal meter and a lead, one end of the loop is in short circuit with the ground, the other end of the loop is grounded through a buzzing gear (namely an on-off gear) of the universal meter, and if the on-off gear is conducted, a buzzing sound is given out to prompt that the loop is conducted and is the same cable core. All tools and tools used in the work and the working form have great potential safety hazards:
(1) if the two ends of the loop have voltages with different polarities, the short circuit of the on-off gear of the multimeter can cause the tripping of the outlet of the protection device; (2) one end of the loop is short-circuited to the ground, so that a huge risk of directly grounding the electrified loop exists; (3) one end of the loop is in short circuit to the ground through the on-off gear of the multimeter, voltage measurement is firstly carried out on the cable core before work, due to the fact that a plurality of secondary loop cables exist, workers are prone to being too fast in operation, measurement is inaccurate or careless, the nuclear cable core is mistakenly considered to be non-pressure, and direct current grounding is finally caused; (4) the common multimeter is of a Fuluke type, an electrical measurement gear and an on-off gear of the common multimeter need to be switched by a manual knob, if the on-off measurement is finished, the on-off gear is not withdrawn, and the voltages of other cable loops are measured again, so that the risk of grounding a live loop exists; (5) workers carry out the work of disassembling, connecting and checking a large number of cable cores, and are easy to fatigue and carelessly and mistakenly touch the electrified loop.
In summary, the following problems mainly exist:
1. the production risk is extremely high, the working mode has potential safety hazards, the requirement on the skill level of workers is high, a corresponding alarm function is not provided, and the secondary circuit on-off test risk is extremely high;
2. work efficiency reduces, and conventional universal meter break-make shelves structure is complicated, need correctly switch between voltage shelves and break-make shelves, and it is very inconvenient to use, and the universality is low, and work efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes above-mentioned prior art is not enough, provides a measuring apparatu is checked to transformer substation's cable core. The utility model discloses have the host computer mode and follow the mode two kinds of different mode, check the cable according to the condition of difference.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a checking and measuring instrument for cable cores of transformer substations comprises a central processing module, a voltage measuring module and an on-off measuring module,
the voltage measuring module is used for measuring the voltage of the secondary circuit and is electrically connected with the central processing module;
the on-off measuring module is provided with a host mode and a slave mode, the host mode is used for measuring the band point condition of the cable core, the slave mode is used for matching with the host to complete checking work on the cable core, and the on-off measuring module is electrically connected with the central processing module.
The utility model discloses a working process:
host mode:
the secondary circuit electrification condition is measured through the voltage acquisition module, and the central processing module judges whether the voltage type exists or not through the voltage acquisition module. If the secondary loop has voltage, synchronously closing the on-off measuring module; and if the secondary loop has no voltage, starting the on-off measurement function to carry out on-off measurement.
A slave mode:
the on-off measuring module is matched with the host on the opposite side to work. When the working mode is selected as a slave machine, if the voltage acquisition module measures no voltage, the slave machine is in a safe state and is ready to enter the next core work; and if the voltage acquisition module measures voltage, sending alarm information.
In a preferred embodiment, the voltage measuring module includes a determining module and an acquiring module, wherein,
the judging module is used for judging the forward/reverse voltage of alternating current and direct current, and the output stage of the judging module is electrically connected with the input stage of the central processing module;
the output stage of the acquisition module is electrically connected with the input stage of the central processing module;
the discrimination module and the acquisition module use the same input stage.
In a preferred scheme, the central processing module comprises an STC8A8K64S4A12 chip; the on-off measuring module comprises a host on-off measuring submodule and a slave on-off measuring submodule, the host on-off measuring submodule is used for a host mode, and an output stage of the host on-off measuring submodule is electrically connected with an input stage of the central processing module; the slave on-off measuring submodule is used for a slave mode, and the output stage of the slave on-off measuring submodule is electrically connected with the input stage of the central processing module; the input stage of the master on-off measuring submodule is the same as the input stage of the slave on-off measuring submodule.
In the preferred scheme, the STC8A8K64S4A12 type control chip has the characteristics of high speed, high reliability, low power consumption and ultra-strong anti-interference.
In a preferred scheme, the slave on-off measuring submodule comprises a first relay, a ninth diode, a sixth NPN triode and a twenty-second resistor, wherein,
the input stage of the slave on-off measuring submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
a first input end of the slave on-off measuring submodule is electrically connected with one end of the switch side of the first relay;
the second input end of the slave on-off measuring submodule is electrically connected with the other end of the switch side of the first relay;
one end of the control side of the first relay is connected with a power supply;
the other end of the control side of the first relay is electrically connected with the anode of a ninth diode;
one end of the control side of the first relay is electrically connected with the cathode of the ninth diode;
the other end of the control side of the first relay is electrically connected with a collector electrode of a sixth NPN triode;
the emitter of the sixth NPN triode is grounded;
the base stage of the sixth NPN triode is electrically connected with one end of the twenty-second resistor;
the other end of the twenty-second resistor is electrically connected with a No. 23 pin of the STC8A8K64S4A12 chip.
In a preferred scheme, the host on-off measuring submodule comprises a first bridge rectifier circuit, a second relay, a third diode, a third NPN triode, a bidirectional voltage regulator tube, a twelfth resistor, a fifteenth resistor, a twenty-second resistor and a nineteenth resistor, wherein,
the first input end of the host on-off measuring submodule is electrically connected with one end of the switch side of the second relay;
the other end of the switch side of the second relay is electrically connected with one end of a fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
the other end of the fifteenth resistor is electrically connected with a No. 1 pin of the STC8A8K64S4A12 chip;
the second input end of the host on-off measuring submodule is electrically connected with the first input end of the first bridge rectifier circuit;
a first output end of the first bridge rectifier circuit is electrically connected with one end of the twelfth resistor;
the other end of the twelfth resistor is electrically connected with a No. 2 pin of the STC8A8K64S4A12 chip;
one end of the twelfth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
one end of the fifteenth resistor is electrically connected with the other end of the bidirectional voltage-stabilizing tube;
one end of the control side of the second relay is connected with a power supply;
the other end of the control side of the second relay is electrically connected with the anode of the third diode;
one end of the control side of the second relay is electrically connected with the cathode of the third diode;
the other end of the control side of the second relay is electrically connected with the collector of the third NPN triode;
the emitter of the third NPN triode is grounded;
the base electrode of the third NPN triode is electrically connected with one end of the nineteenth resistor;
the other end of the nineteenth resistor is electrically connected with a No. 24 pin of the STC8A8K64S4A12 chip.
In a preferred embodiment, the voltage measuring module includes a discrimination sub-module and a collection sub-module, wherein,
the discrimination submodule is used for discriminating the forward/reverse voltage of alternating current and direct current, and the output stage of the discrimination submodule is electrically connected with the input stage of the central processing module;
the output stage of the acquisition submodule is electrically connected with the input stage of the central processing module;
the discrimination submodule and the acquisition submodule use the same input stage.
In a preferred embodiment, the acquisition submodule includes a second bridge rectifier circuit, an eighth resistor, a ninth resistor, an eleventh resistor, a third capacitor, a tenth capacitor, and an eleventh capacitor, wherein,
the first input end of the second bridge rectifier circuit is defined as the first input end of the acquisition submodule;
the second input end of the second bridge rectifier circuit is defined as the second input end of the acquisition submodule;
a first output end of the second bridge rectifier circuit is electrically connected with one end of an eleventh capacitor;
a second output end of the second bridge rectifier circuit is electrically connected with the other end of the eleventh capacitor;
a first output end of the second bridge rectifier circuit is electrically connected with one end of the eleventh resistor;
the other end of the eleventh resistor is electrically connected with one end of the eighth resistor;
the other end of the eighth resistor is electrically connected with one end of the ninth resistor;
the other end of the ninth resistor is electrically connected with the other end of the eleventh capacitor;
the other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with a No. 3 pin of the STC8A8K64S4A12 chip;
the other end of the eighth resistor is electrically connected with one end of the third capacitor;
the other end of the ninth resistor is electrically connected with the other end of the third capacitor;
the other end of the eighth resistor is electrically connected with one end of the tenth capacitor;
the other end of the ninth resistor is electrically connected with the other end of the tenth capacitor.
In a preferred embodiment, the sub-module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode, a first voltage regulator, a second voltage regulator, a first capacitor, a second capacitor, a first optocoupler element, and a second optocoupler element,
the input stage of the discrimination submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
one end of the fifth resistor is defined as a first input end of the judging module, and the other end of the fifth resistor is electrically connected with one end of the third resistor;
one end of the sixth resistor is defined as a second input end of the judging module, and the other end of the sixth resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with the anode of the second diode;
the other end of the third resistor is electrically connected with the anode of the first voltage-regulator tube;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the cathode of the second diode is electrically connected with the cathode of the second voltage-stabilizing tube;
the cathode of the second diode is electrically connected with the other end of the second capacitor;
the cathode of the second diode is electrically connected with one end of the second resistor;
the other end of the fourth resistor is electrically connected with the anode of the first diode;
the other end of the fourth resistor is electrically connected with the anode of the second voltage-regulator tube;
the other end of the fourth resistor is electrically connected with one end of the second capacitor;
the cathode of the first diode is electrically connected with the cathode of the first voltage-stabilizing tube;
the cathode of the first diode is electrically connected with the other end of the first capacitor;
the cathode of the first diode is electrically connected with one end of the first resistor;
the other end of the first resistor is electrically connected with a first input end of the first optical coupling element;
the other end of the third resistor is electrically connected with a second input end of the first optical coupling element;
the other end of the second resistor is electrically connected with a first input end of the second optical coupling element;
the other end of the fourth resistor is electrically connected with a second input end of the second optical coupling element;
the first output end of the first optical coupler element is electrically connected with a No. 21 pin of the STC8A8K64S4A12 chip;
the second output end of the first optical coupling element is grounded;
the first output end of the second optical coupler element is electrically connected with a No. 20 pin of the STC8A8K64S4A12 chip;
and the second output end of the second optical coupling element is grounded.
In a preferred scheme, the substation cable core checking and measuring instrument further comprises a sound and light alarm module, and the sound and light alarm module is electrically connected with the central processing module.
In a preferred scheme, the audible and visual alarm module comprises an NY9a001 chip, a second electrolytic capacitor, a fourth diode, a sixth capacitor, a buzzer, a second NPN triode, a fourth NPN triode, a thirteenth resistor, a fourteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a second light-emitting LED, a third light-emitting LED and a speaker, wherein,
a No. 7 pin of the NY9A001 chip is electrically connected with one end of a sixth capacitor;
the other end of the sixth capacitor is grounded;
the No. 7 pin of the NY9A001 chip is electrically connected with the cathode of the fourth diode;
the anode of the fourth diode is connected with a power supply;
the No. 7 pin of the NY9A001 chip is electrically connected with the anode of the second electrolytic capacitor;
the negative electrode of the second electrolytic capacitor is grounded;
the No. 8 pin of the NY9A001 chip is electrically connected with one end of the horn;
the other end of the horn is grounded;
a No. 5 pin of the NY9A001 chip is electrically connected with a collector electrode of a fourth NPN triode;
the emitter of the fourth NPN triode is grounded;
a base electrode of the fourth NPN triode is electrically connected with one end of the sixteenth resistor;
the other end of the sixteenth resistor is electrically connected with an emitting electrode of a fourth NPN triode;
a base electrode of the fourth NPN triode is electrically connected with one end of the fourteenth resistor;
the other end of the fourteenth resistor is electrically connected with a No. 42 pin of the STC8A8K64S4A12 chip;
one end of the thirteenth resistor is connected with a power supply;
the other end of the thirteenth resistor is electrically connected with the anode of the second light-emitting LED;
the cathode of the second light-emitting LED is electrically connected with the No. 41 pin of the STC8A8K64S4A12 chip;
the anode of the third light-emitting LED is connected with a power supply;
the cathode of the third light-emitting LED is electrically connected with one end of a seventeenth resistor;
the other end of the seventeenth resistor is electrically connected with the anode of the sixth diode;
the anode of the third light-emitting LED is electrically connected with the cathode of the sixth diode;
one end of the buzzer is connected with a power supply;
the other end of the buzzer is electrically connected with the anode of the sixth diode;
the anode of the sixth diode is electrically connected with the collector of the second NPN triode;
the emitter of the second NPN triode is grounded;
the base electrode of the second NPN triode is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with a No. 26 pin of the STC8A8K64S4A12 chip. In the preferred embodiment, if the STC8A8K64S4a12 chip determines that the secondary circuit has no voltage, and the secondary circuit is in a conducting state, the STC8A8K64S4a12 chip starts the third light-emitting LED (green flashing) and the buzzer; if the STC8A8K64S4A12 chip judges that the secondary circuit has voltage, the STC8A8K64S4A12 chip starts a second light-emitting LED (red flashing) and starts a loudspeaker to emit voice information to remind a worker to leave.
In a preferred scheme, the central processing module further comprises a confirmation key, a ninth capacitor, an inductor, a first electrolytic capacitor, a fourth capacitor, a tenth resistor, a fifth capacitor and a third voltage regulator tube, wherein,
the No. 38 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a confirmation key;
the other end of the confirmation key is grounded;
the No. 16 pin of the STC8A8K64S4A12 chip is grounded;
the No. 16 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a ninth capacitor;
the other end of the ninth capacitor is electrically connected with a No. 14 pin of the STC8A8K64S4A12 chip;
the 14-number pin of the STC8A8K64S4A12 chip is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the inductor;
the other end of the inductor is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the anode of the first electrolytic capacitor;
the cathode of the first electrolytic capacitor is grounded;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a fourth capacitor;
the other end of the fourth capacitor is electrically connected with the cathode of the first electrolytic capacitor;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a tenth resistor;
the other end of the tenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with the other end of the fourth capacitor;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the No. 11 pin of the STC8A8K64S4A12 chip;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the cathode of the third voltage-regulator tube;
and the anode of the third voltage-stabilizing tube is grounded.
In a preferred scheme, the substation cable core checking and measuring instrument further comprises a brightness sensing module and an illumination module, wherein the brightness sensing module is electrically connected with the central processing module; the lighting module is electrically connected with the central processing module.
In this preferred scheme, when luminance sensor detected that luminance is not enough around, central processing module started lighting module and provides illumination, makes things convenient for the staff to be under the environment that luminance is not enough to be under construction.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
1. the cable checking system has two different working modes, namely a master mode and a slave mode, and the cable is checked according to different conditions;
2. the safety production level is improved, and the serious consequences of misoperation of an electric element, power grounding and the like caused by mistakenly touching a live circuit when a secondary circuit on-off test is carried out in an operating transformer substation are successfully solved;
3. the working efficiency is improved, the operation is simple through the integrated design scheme of voltage measurement and on-off test, and the operation level of the labor of the staff is improved.
Drawings
FIG. 1 is a structural view of example 1.
Fig. 2 is a circuit diagram of a central processing module according to an embodiment.
FIG. 3 is a circuit diagram of a slave on-off measurement submodule of the embodiment.
FIG. 4 is a circuit diagram of a host on-off measurement sub-module of an embodiment.
FIG. 5 is a circuit diagram of a discrimination submodule according to an embodiment.
Fig. 6 is a circuit diagram of an acquisition sub-module of an embodiment.
FIG. 7 is a circuit diagram of an embodiment of an audible and visual alarm module.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, a transformer substation cable core checking and measuring instrument comprises a central processing module, a voltage measuring module, an on-off measuring module and an audible and visual alarm module, wherein,
the voltage measuring module is used for measuring the voltage of the secondary circuit and is electrically connected with the central processing module;
the on-off measuring module is provided with a host mode and a slave mode, the host mode is used for measuring the band point condition of the cable core, the slave mode is used for matching with the host to complete checking work on the cable core, and the on-off measuring module is electrically connected with the central processing module;
the output stage of the central processing module is electrically connected with the sound-light alarm module;
the on-off measuring module comprises a host on-off measuring submodule and a slave on-off measuring submodule, the host on-off measuring submodule is used for a host mode, and an output stage of the host on-off measuring submodule is electrically connected with an input stage of the central processing module; the slave on-off measuring submodule is used in a slave mode, and the output stage of the slave on-off measuring submodule is electrically connected with the input stage of the central processing module; the input stage of the host on-off measuring submodule is the same as the input stage of the slave on-off measuring submodule;
the voltage measuring module comprises a discrimination submodule and an acquisition submodule,
the judgment submodule is used for judging the forward/reverse voltage of alternating current and direct current, and the output stage of the judgment submodule is electrically connected with the input stage of the central processing module;
the output stage of the acquisition submodule is electrically connected with the input stage of the central processing module;
the discrimination submodule and the acquisition submodule use the same input stage.
As shown in fig. 2, the central processing module includes an STC8A8K64S4a12 chip, a confirmation key, a ninth capacitor, an inductor, a first electrolytic capacitor, a fourth capacitor, a tenth resistor, a fifth capacitor, and a third regulator, wherein,
the No. 38 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the confirmation key;
the other end of the confirmation key is grounded;
the No. 16 pin of the STC8A8K64S4A12 chip is grounded;
a No. 16 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the ninth capacitor;
the other end of the ninth capacitor is electrically connected with a No. 14 pin of the STC8A8K64S4A12 chip;
the 14-number pin of the STC8A8K64S4A12 chip is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the inductor;
the other end of the inductor is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the anode of the first electrolytic capacitor;
the cathode of the first electrolytic capacitor is grounded;
a No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the fourth capacitor;
the other end of the fourth capacitor is electrically connected with the cathode of the first electrolytic capacitor;
a pin No. 12 of the STC8A8K64S4A12 chip is electrically connected with one end of a tenth resistor;
the other end of the tenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with the other end of the fourth capacitor;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the No. 11 pin of the STC8A8K64S4A12 chip;
a pin No. 12 of the STC8A8K64S4A12 chip is electrically connected with the cathode of the third voltage regulator tube;
the anode of the third voltage regulator tube is grounded.
As shown in fig. 3, the slave on-off measuring submodule includes a first relay, a ninth diode, a sixth NPN transistor, and a twenty-second resistor, wherein,
the input stage of the slave on-off measuring submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
a first input end of the slave on-off measuring submodule is electrically connected with one end of a switch side of the first relay;
the second input end of the slave on-off measuring submodule is electrically connected with the other end of the switch side of the first relay;
one end of the control side of the first relay is connected with a power supply;
the other end of the control side of the first relay is electrically connected with the anode of the ninth diode;
one end of the control side of the first relay is electrically connected with the cathode of the ninth diode;
the other end of the control side of the first relay is electrically connected with a collector electrode of a sixth NPN triode;
an emitter of the sixth NPN triode is grounded;
the base stage of the sixth NPN triode is electrically connected with one end of the twenty-second resistor;
the other end of the twenty-second resistor is electrically connected with the pin 23 of the STC8A8K64S4A12 chip.
As shown in fig. 4, the host on-off measuring submodule includes a first bridge rectifier circuit, a second relay, a third diode, a third NPN transistor, a bidirectional regulator tube, a twelfth resistor, a fifteenth resistor, a twenty-second resistor, and a nineteenth resistor, wherein,
a first input end of the host on-off measuring submodule is electrically connected with one end of the switch side of the second relay;
the other end of the switch side of the second relay is electrically connected with one end of a fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
the other end of the fifteenth resistor is electrically connected with a No. 1 pin of the STC8A8K64S4A12 chip;
the second input end of the host on-off measuring submodule is electrically connected with the first input end of the first bridge rectifier circuit;
a first output end of the first bridge rectifier circuit is electrically connected with one end of the twelfth resistor;
the other end of the twelfth resistor is electrically connected with a No. 2 pin of the STC8A8K64S4A12 chip;
one end of the twelfth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
one end of the fifteenth resistor is electrically connected with the other end of the bidirectional voltage-stabilizing tube;
one end of the control side of the second relay is connected with a power supply;
the other end of the control side of the second relay is electrically connected with the anode of the third diode;
one end of the control side of the second relay is electrically connected with the cathode of the third diode;
the other end of the control side of the second relay is electrically connected with a collector electrode of a third NPN triode;
the emitter of the third NPN triode is grounded;
the base electrode of the third NPN triode is electrically connected with one end of the nineteenth resistor;
the other end of the nineteenth resistor is electrically connected with the No. 24 pin of the STC8A8K64S4A12 chip.
As shown in fig. 5, the discrimination submodule includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode, a first voltage regulator tube, a second voltage regulator tube, a first capacitor, a second capacitor, a first optocoupler element, and a second optocoupler element,
the input stage of the discrimination submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
one end of the fifth resistor is defined as a first input end of the judging module, and the other end of the fifth resistor is electrically connected with one end of the third resistor;
one end of the sixth resistor is defined as a second input end of the judging module, and the other end of the sixth resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with the anode of the second diode;
the other end of the third resistor is electrically connected with the anode of the first voltage-regulator tube;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the cathode of the second diode is electrically connected with the cathode of the second voltage-regulator tube;
the cathode of the second diode is electrically connected with the other end of the second capacitor;
the cathode of the second diode is electrically connected with one end of the second resistor;
the other end of the fourth resistor is electrically connected with the anode of the first diode;
the other end of the fourth resistor is electrically connected with the anode of the second voltage-regulator tube;
the other end of the fourth resistor is electrically connected with one end of the second capacitor;
the cathode of the first diode is electrically connected with the cathode of the first voltage-stabilizing tube;
the cathode of the first diode is electrically connected with the other end of the first capacitor;
the cathode of the first diode is electrically connected with one end of the first resistor;
the other end of the first resistor is electrically connected with a first input end of the first optical coupler element;
the other end of the third resistor is electrically connected with a second input end of the first optical coupler element;
the other end of the second resistor is electrically connected with a first input end of the second optical coupling element;
the other end of the fourth resistor is electrically connected with a second input end of the second optical coupling element;
a first output end of the first optical coupler element is electrically connected with a No. 21 pin of the STC8A8K64S4A12 chip;
the second output end of the first optical coupling element is grounded;
a first output end of the second optical coupler element is electrically connected with a No. 20 pin of the STC8A8K64S4A12 chip;
the second output end of the second optical coupling element is grounded.
As shown in fig. 6, the acquisition submodule includes a second bridge rectifier circuit, an eighth resistor, a ninth resistor, an eleventh resistor, a third capacitor, a tenth capacitor, and an eleventh capacitor, wherein,
the first input end of the second bridge rectifier circuit is defined as the first input end of the acquisition submodule;
a second input end of the second bridge rectifier circuit is defined as a second input end of the acquisition submodule;
a first output end of the second bridge rectifier circuit is electrically connected with one end of the eleventh capacitor;
a second output end of the second bridge rectifier circuit is electrically connected with the other end of the eleventh capacitor;
a first output end of the second bridge rectifier circuit is electrically connected with one end of the eleventh resistor;
the other end of the eleventh resistor is electrically connected with one end of the eighth resistor;
the other end of the eighth resistor is electrically connected with one end of the ninth resistor;
the other end of the ninth resistor is electrically connected with the other end of the eleventh capacitor;
the other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with a No. 3 pin of the STC8A8K64S4A12 chip;
the other end of the eighth resistor is electrically connected with one end of the third capacitor;
the other end of the ninth resistor is electrically connected with the other end of the third capacitor;
the other end of the eighth resistor is electrically connected with one end of the tenth capacitor;
the other end of the ninth resistor is electrically connected with the other end of the tenth capacitor.
Wherein, as shown in fig. 7, the audible and visual alarm module comprises an NY9a001 chip, a second electrolytic capacitor, a fourth diode, a sixth capacitor, a buzzer, a second NPN triode, a fourth NPN triode, a thirteenth resistor, a fourteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a second light emitting LED, a third light emitting LED and a speaker, wherein,
a No. 7 pin of the NY9A001 chip is electrically connected with one end of the sixth capacitor;
the other end of the sixth capacitor is grounded;
a No. 7 pin of the NY9A001 chip is electrically connected with the cathode of the fourth diode;
the anode of the fourth diode is connected with the power supply;
a No. 7 pin of the NY9A001 chip is electrically connected with the anode of the second electrolytic capacitor;
the negative electrode of the second electrolytic capacitor is grounded;
a No. 8 pin of the NY9A001 chip is electrically connected with one end of the horn;
the other end of the horn is grounded;
a No. 5 pin of the NY9A001 chip is electrically connected with a collector electrode of a fourth NPN triode;
the emitter of the fourth NPN triode is grounded;
a base electrode of the fourth NPN triode is electrically connected with one end of the sixteenth resistor;
the other end of the sixteenth resistor is electrically connected with an emitting electrode of the fourth NPN triode;
a base electrode of the fourth NPN triode is electrically connected with one end of the fourteenth resistor;
the other end of the fourteenth resistor is electrically connected with a No. 42 pin of the STC8A8K64S4A12 chip;
one end of the thirteenth resistor is connected with the power supply;
the other end of the thirteenth resistor is electrically connected with the anode of the second light-emitting LED;
the cathode of the second light-emitting LED is electrically connected with the No. 41 pin of the STC8A8K64S4A12 chip;
the anode of the third light-emitting LED is connected with the power supply;
the cathode of the third light-emitting LED is electrically connected with one end of the seventeenth resistor;
the other end of the seventeenth resistor is electrically connected with the anode of the sixth diode;
the anode of the third light-emitting LED is electrically connected with the cathode of the sixth diode;
one end of the buzzer is connected with a power supply;
the other end of the buzzer is electrically connected with the anode of the sixth diode;
the anode of the sixth diode is electrically connected with the collector of the second NPN triode;
the emitter of the second NPN triode is grounded;
the base electrode of the second NPN triode is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with a No. 26 pin of the STC8A8K64S4A12 chip.
Working procedure of example 1:
host mode:
the STC8A8K64S4A12 chip measures the electrification condition of a secondary loop through a voltage acquisition module, the voltage type is judged through the voltage acquisition module, if the secondary loop has voltage, an audible and visual alarm module is started immediately, a loudspeaker and a red LCD prompt an operator to mistakenly touch the electrified loop, and the on-off measurement module is locked synchronously; if the secondary loop has no voltage, the on-off measurement function is started, if the tested secondary loop is conducted, the buzzer, the green LED and the like are used for prompting, and if the secondary loop is not conducted, the secondary loop returns after a certain time delay.
A slave mode:
the embodiment 1 of the slave mode is used for matching with a host to carry out cable core checking work instead of the traditional bare conductor. The STC8A8K64S4A12 chip measures the electrification condition of the core cable through the voltage acquisition module and judges the voltage type. If the cable core is electrified, the measuring instrument immediately starts a voice light alarm system to prompt an operator to mistakenly touch an electrified loop, and the connection between the embodiment and the ground is immediately cut off through a relay; and if the safety of the cable core is confirmed to be free of voltage, the two input stages of the measuring instrument are in short circuit, and the host machine is matched for testing work.
Example 2
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A checking and measuring instrument for a cable core of a transformer substation is characterized by comprising a central processing module, a voltage measuring module and an on-off measuring module, wherein,
the voltage measuring module is used for measuring the voltage of the secondary circuit and is electrically connected with the central processing module;
the on-off measuring module is provided with a host mode and a slave mode, the host mode is used for measuring the band point condition of the cable core, the slave mode is used for matching with the host to complete checking work on the cable core, and the on-off measuring module is electrically connected with the central processing module;
the central processing module comprises an STC8A8K64S4A12 chip; the on-off measuring module comprises a host on-off measuring submodule and a slave on-off measuring submodule, the host on-off measuring submodule is used for a host mode, and an output stage of the host on-off measuring submodule is electrically connected with an input stage of the central processing module; the slave on-off measuring submodule is used for a slave mode, and the output stage of the slave on-off measuring submodule is electrically connected with the input stage of the central processing module; the input stage of the host on-off measuring submodule is the same as the input stage of the slave on-off measuring submodule;
the slave on-off measuring submodule comprises a first relay, a ninth diode, a sixth NPN triode and a twenty-second resistor, wherein,
the input stage of the slave on-off measuring submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
a first input end of the slave on-off measuring submodule is electrically connected with one end of the switch side of the first relay;
the second input end of the slave on-off measuring submodule is electrically connected with the other end of the switch side of the first relay;
one end of the control side of the first relay is connected with a power supply;
the other end of the control side of the first relay is electrically connected with the anode of a ninth diode;
one end of the control side of the first relay is electrically connected with the cathode of the ninth diode;
the other end of the control side of the first relay is electrically connected with a collector electrode of a sixth NPN triode;
the emitter of the sixth NPN triode is grounded;
the base stage of the sixth NPN triode is electrically connected with one end of the twenty-second resistor;
the other end of the twenty-second resistor is electrically connected with a No. 23 pin of the STC8A8K64S4A12 chip;
the host on-off measuring submodule comprises a first bridge rectifier circuit, a second relay, a third diode, a third NPN triode, a bidirectional voltage regulator tube, a twelfth resistor, a fifteenth resistor, a twenty-second resistor and a nineteenth resistor, wherein,
the first input end of the host on-off measuring submodule is electrically connected with one end of the switch side of the second relay;
the other end of the switch side of the second relay is electrically connected with one end of a fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
the other end of the fifteenth resistor is electrically connected with a No. 1 pin of the STC8A8K64S4A12 chip;
the second input end of the host on-off measuring submodule is electrically connected with the first input end of the first bridge rectifier circuit;
a first output end of the first bridge rectifier circuit is electrically connected with one end of the twelfth resistor;
the other end of the twelfth resistor is electrically connected with a No. 2 pin of the STC8A8K64S4A12 chip;
one end of the twelfth resistor is electrically connected with one end of the bidirectional voltage-stabilizing tube;
one end of the fifteenth resistor is electrically connected with the other end of the bidirectional voltage-stabilizing tube;
one end of the control side of the second relay is connected with a power supply;
the other end of the control side of the second relay is electrically connected with the anode of the third diode;
one end of the control side of the second relay is electrically connected with the cathode of the third diode;
the other end of the control side of the second relay is electrically connected with the collector of the third NPN triode;
the emitter of the third NPN triode is grounded;
the base electrode of the third NPN triode is electrically connected with one end of the nineteenth resistor;
the other end of the nineteenth resistor is electrically connected with a No. 24 pin of the STC8A8K64S4A12 chip.
2. The substation cable core verification measuring instrument according to claim 1, wherein the voltage measuring module comprises a discrimination sub-module and a collection sub-module, wherein,
the discrimination submodule is used for discriminating the forward/reverse voltage of alternating current and direct current, and the output stage of the discrimination submodule is electrically connected with the input stage of the central processing module;
the output stage of the acquisition submodule is electrically connected with the input stage of the central processing module;
the discrimination submodule and the acquisition submodule use the same input stage.
3. The substation cable core verification measuring instrument according to claim 2, wherein the acquisition submodule comprises a second bridge rectifier circuit, an eighth resistor, a ninth resistor, an eleventh resistor, a third capacitor, a tenth capacitor and an eleventh capacitor, wherein,
the first input end of the second bridge rectifier circuit is defined as the first input end of the acquisition submodule;
the second input end of the second bridge rectifier circuit is defined as the second input end of the acquisition submodule;
a first output end of the second bridge rectifier circuit is electrically connected with one end of an eleventh capacitor;
a second output end of the second bridge rectifier circuit is electrically connected with the other end of the eleventh capacitor;
a first output end of the second bridge rectifier circuit is electrically connected with one end of the eleventh resistor;
the other end of the eleventh resistor is electrically connected with one end of the eighth resistor;
the other end of the eighth resistor is electrically connected with one end of the ninth resistor;
the other end of the ninth resistor is electrically connected with the other end of the eleventh capacitor;
the other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with a No. 3 pin of the STC8A8K64S4A12 chip;
the other end of the eighth resistor is electrically connected with one end of the third capacitor;
the other end of the ninth resistor is electrically connected with the other end of the third capacitor;
the other end of the eighth resistor is electrically connected with one end of the tenth capacitor;
the other end of the ninth resistor is electrically connected with the other end of the tenth capacitor.
4. The substation cable core checking and measuring instrument according to claim 2, wherein the identification submodule comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode, a first voltage regulator tube, a second voltage regulator tube, a first capacitor, a second capacitor, a first optical coupling element and a second optical coupling element,
the input stage of the discrimination submodule comprises a first input end and a second input end, wherein the first input end is used for collecting high potential, and the second input end is used for collecting low potential;
one end of the fifth resistor is defined as a first input end of the judging module, and the other end of the fifth resistor is electrically connected with one end of the third resistor;
one end of the sixth resistor is defined as a second input end of the judging module, and the other end of the sixth resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with the anode of the second diode;
the other end of the third resistor is electrically connected with the anode of the first voltage-regulator tube;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the cathode of the second diode is electrically connected with the cathode of the second voltage-stabilizing tube;
the cathode of the second diode is electrically connected with the other end of the second capacitor;
the cathode of the second diode is electrically connected with one end of the second resistor;
the other end of the fourth resistor is electrically connected with the anode of the first diode;
the other end of the fourth resistor is electrically connected with the anode of the second voltage-regulator tube;
the other end of the fourth resistor is electrically connected with one end of the second capacitor;
the cathode of the first diode is electrically connected with the cathode of the first voltage-stabilizing tube;
the cathode of the first diode is electrically connected with the other end of the first capacitor;
the cathode of the first diode is electrically connected with one end of the first resistor;
the other end of the first resistor is electrically connected with a first input end of the first optical coupling element;
the other end of the third resistor is electrically connected with a second input end of the first optical coupling element;
the other end of the second resistor is electrically connected with a first input end of the second optical coupling element;
the other end of the fourth resistor is electrically connected with a second input end of the second optical coupling element;
the first output end of the first optical coupler element is electrically connected with a No. 21 pin of the STC8A8K64S4A12 chip;
the second output end of the first optical coupling element is grounded;
the first output end of the second optical coupler element is electrically connected with a No. 20 pin of the STC8A8K64S4A12 chip;
and the second output end of the second optical coupling element is grounded.
5. The substation cable core checking and measuring instrument according to any one of claims 1 to 4, further comprising an audible and visual alarm module electrically connected to the central processing module.
6. The substation cable core checking and measuring instrument according to claim 5, wherein the audible and visual alarm module comprises an NY9A001 chip, a second electrolytic capacitor, a fourth diode, a sixth capacitor, a buzzer, a second NPN triode, a fourth NPN triode, a thirteenth resistor, a fourteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a second light-emitting LED, a third light-emitting LED and a horn, wherein,
a No. 7 pin of the NY9A001 chip is electrically connected with one end of a sixth capacitor;
the other end of the sixth capacitor is grounded;
the No. 7 pin of the NY9A001 chip is electrically connected with the cathode of the fourth diode;
the anode of the fourth diode is connected with a power supply;
the No. 7 pin of the NY9A001 chip is electrically connected with the anode of the second electrolytic capacitor;
the negative electrode of the second electrolytic capacitor is grounded;
the No. 8 pin of the NY9A001 chip is electrically connected with one end of the horn;
the other end of the horn is grounded;
a No. 5 pin of the NY9A001 chip is electrically connected with a collector electrode of a fourth NPN triode;
the emitter of the fourth NPN triode is grounded;
a base electrode of the fourth NPN triode is electrically connected with one end of the sixteenth resistor;
the other end of the sixteenth resistor is electrically connected with an emitting electrode of a fourth NPN triode;
a base electrode of the fourth NPN triode is electrically connected with one end of the fourteenth resistor;
the other end of the fourteenth resistor is electrically connected with a No. 42 pin of the STC8A8K64S4A12 chip;
one end of the thirteenth resistor is connected with a power supply;
the other end of the thirteenth resistor is electrically connected with the anode of the second light-emitting LED;
the cathode of the second light-emitting LED is electrically connected with the No. 41 pin of the STC8A8K64S4A12 chip;
the anode of the third light-emitting LED is connected with a power supply;
the cathode of the third light-emitting LED is electrically connected with one end of a seventeenth resistor;
the other end of the seventeenth resistor is electrically connected with the anode of the sixth diode;
the anode of the third light-emitting LED is electrically connected with the cathode of the sixth diode;
one end of the buzzer is connected with a power supply;
the other end of the buzzer is electrically connected with the anode of the sixth diode;
the anode of the sixth diode is electrically connected with the collector of the second NPN triode;
the emitter of the second NPN triode is grounded;
the base electrode of the second NPN triode is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with a No. 26 pin of the STC8A8K64S4A12 chip.
7. The substation cable core verification measuring instrument of claim 1, 2, 3, 4 or 6, wherein the central processing module further comprises a confirmation key, a ninth capacitor, an inductor, a first electrolytic capacitor, a fourth capacitor, a tenth resistor, a fifth capacitor and a third voltage regulator tube, wherein,
the No. 38 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a confirmation key;
the other end of the confirmation key is grounded;
the No. 16 pin of the STC8A8K64S4A12 chip is grounded;
the No. 16 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a ninth capacitor;
the other end of the ninth capacitor is electrically connected with a No. 14 pin of the STC8A8K64S4A12 chip;
the 14-number pin of the STC8A8K64S4A12 chip is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of the inductor;
the other end of the inductor is connected with a power supply;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the anode of the first electrolytic capacitor;
the cathode of the first electrolytic capacitor is grounded;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a fourth capacitor;
the other end of the fourth capacitor is electrically connected with the cathode of the first electrolytic capacitor;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with one end of a tenth resistor;
the other end of the tenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with the other end of the fourth capacitor;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the No. 11 pin of the STC8A8K64S4A12 chip;
the No. 12 pin of the STC8A8K64S4A12 chip is electrically connected with the cathode of the third voltage-regulator tube;
and the anode of the third voltage-stabilizing tube is grounded.
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| CN201921135522.7U CN210894557U (en) | 2019-07-18 | 2019-07-18 | Transformer substation cable core checking and measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261738A (en) * | 2019-07-18 | 2019-09-20 | 广东电网有限责任公司 | A kind of substation cable core is to measuring instrument |
| CN111929616A (en) * | 2020-07-30 | 2020-11-13 | 广东电网有限责任公司 | Multi-channel cable detection method, system and computer readable storage medium |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261738A (en) * | 2019-07-18 | 2019-09-20 | 广东电网有限责任公司 | A kind of substation cable core is to measuring instrument |
| CN111929616A (en) * | 2020-07-30 | 2020-11-13 | 广东电网有限责任公司 | Multi-channel cable detection method, system and computer readable storage medium |
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