CN216209820U - Automatic checking device for secondary voltage parallel loop - Google Patents
Automatic checking device for secondary voltage parallel loop Download PDFInfo
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- CN216209820U CN216209820U CN202122522350.2U CN202122522350U CN216209820U CN 216209820 U CN216209820 U CN 216209820U CN 202122522350 U CN202122522350 U CN 202122522350U CN 216209820 U CN216209820 U CN 216209820U
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Abstract
The utility model provides an automatic checking device for a secondary voltage parallel loop, and belongs to the technical field of power electronics. The method comprises the following steps: the device comprises a main controller, a first bus input/output interface, a second bus input/output interface, a touch display module, a test voltage generation module, an indicator lamp set, a manual phase angle adjusting assembly, a nuclear phase module, a wireless signal transceiver, a power supply module, a secondary voltage parallel module and a working mode switching key.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to an automatic checking device for a secondary voltage parallel loop.
Background
After primary equipment is put into operation, nuclear phase work under the same source and different sources of a secondary voltage loop is carried out according to relevant regulations, in the secondary loop, two sections of buses are arranged in a plant station at the same voltage level, one PT is arranged on each section of bus, when a first section of bus PT is pretested, the operation needs to be quitted, and at the moment, the relay protection of the first section of bus is possible to be mistakenly operated due to voltage loss, so that the protection voltage on the two sections of buses needs to be maintained by using a second section of bus PT in the process of pretesting the first section of bus PT, namely, voltage transformers are arranged in parallel, and a protection device, a measuring instrument and the like connected to the section of bus can continue to normally operate.
In the traditional voltage parallel device, only the primary system is used as a secondary voltage parallel condition in parallel, and the abnormal condition of the voltage of the two sections of the secondary side buses is not considered, so that the abnormal parallel accidents of the relay burnout and the like, which are caused by the voltage difference and the phase difference formed by the reverse connection of the circuits, are easily caused under the condition that the traditional voltage parallel condition is met in the actual operation, operation and maintenance, and the stability of the power grid is poor.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an automatic calibration apparatus for secondary voltage parallel circuit, which is used to ensure that the wiring of the secondary circuit is correct before the secondary voltage parallel operation.
The technical scheme adopted by the embodiment of the utility model for solving the technical problem is as follows:
a secondary voltage parallel loop automatic calibration device comprises: the device comprises a main controller, a first bus input/output interface, a second bus input/output interface, a touch display module, a test voltage generation module, an early warning prompt lamp, a manual phase angle adjusting assembly, a nuclear phase module, a wireless signal transceiver, a power supply module, a secondary voltage parallel module and a working mode switching key, wherein the main controller, the first bus input/output interface, the second bus input/output interface, the touch display module, the test voltage generation module, the early warning prompt lamp, the nuclear phase module, the wireless signal transceiver, the power supply module, the secondary voltage parallel module and the working mode switching key are all electrically connected with the main controller, and the power supply module is used for supplying power to all electrical appliances;
the test voltage generation module comprises three groups of test voltage generation circuits, each test voltage generation circuit comprises a sine wave generator and a phase adjustment circuit, the sine wave generator is connected with an input terminal of the phase adjustment circuit, and an output terminal of the phase adjustment circuit is connected with the phase checking module and the first bus input/output interface;
the three output ports of the three groups of test voltage generating circuits are respectively and correspondingly connected to the first A phase voltage interface, the first B phase voltage interface and the first C phase voltage interface;
the second bus input and output interface comprises a second A phase voltage interface, a second B phase voltage interface, a second C phase voltage interface and a second zero phase voltage interface; the second bus input/output interface is connected with the nuclear phase module;
the manual phase angle adjusting component is connected with the test voltage generating circuit.
Preferably, the phase adjusting circuit is composed of a first operational amplifier U1, a second operational amplifier U2, a single chip microcomputer U3 for digitally adjusting the resistance value, a variable resistor for manually adjusting the resistance value, an input terminal and an output terminal:
the sine wave signal generated by the sine wave generator is input to the phase adjusting circuit through the input terminal, the input terminal is connected to the-IN end of the U1 IN series, the + IN end of the U1 is grounded, the OUT end of the U1 is connected to the + IN end of the U2 and the-IN end of the U2, the-IN end of the U2 is connected with a constant-value resistor IN series and then connected to the second end of the selector, the first end of the selector is connected with the single chip microcomputer U3, the third end of the selector is connected with the variable resistor, the OUT end of the U2 is connected with the output terminal, and the second end of the selector is alternatively connected with the other two ends.
Preferably, the manual phase angle adjusting assembly comprises three adjusting sliders configured with sliding rails, and the three adjusting sliders are respectively connected to the sliders of the variable resistors of the phase adjusting circuit in the three groups of test voltage generating circuits in a transmission manner.
Preferably, the anti-interference device further comprises an anti-vibration and/or anti-electromagnetic interference anti-interference component, and the anti-interference component is electrically connected with the main controller.
Preferably, the system further comprises a GPS time synchronization device, and the GPS time synchronization device is electrically connected with the main controller.
Preferably, the secondary voltage parallel module includes a primary isolating switch, two primary isolating switches, and a parallel switch, which are connected in sequence, where the primary isolating switch, the two primary isolating switches, and the parallel switch are all three-phase switches, the primary isolating switch is connected between the first bus input/output interface and the parallel switch, and the two primary isolating switches are connected between the second bus input/output interface and the parallel switch.
Preferably, the working modes of the automatic calibration device for the secondary voltage parallel loop comprise a loop detection working mode and a secondary bus voltage parallel working mode, and when the port of the main controller connected with the working mode switching key is at a high level, the secondary voltage parallel module is powered off and is in a non-working state;
when the port of the main controller connected with the working mode switching key is at a low level, the test voltage generation module is powered down and is in a non-working state.
Preferably, the phase checking module is configured to determine that the phase checking result of the voltage signal flowing through the first bus input/output interface and the phase checking result of the voltage signal flowing through the second bus input/output interface are inconsistent, and the warning indicator light is turned on.
Preferably, the system further comprises a reset key, wherein the reset key is electrically connected with the main controller.
Preferably, the amplitude range of the output voltage of the output port of the test voltage generation circuit is 0-36V, and the phase angle value range of the output voltage of the output port of the test voltage generation circuit is 0-180 °.
It can be known from the above technical solutions that the automatic calibration apparatus for secondary voltage parallel loop provided in the embodiments of the present invention is composed of a main controller, a first bus input/output interface, a second bus input/output interface, a touch display module, a test voltage generation module, an early warning lamp, a manual phase angle adjustment component, a nuclear phase module, a wireless signal transceiver, a power supply module, a secondary voltage parallel module and a working mode switching key, wherein before the secondary voltage parallel operation, the test voltage generation module generates three groups of sine wave test signals with any phase angle and amplitude to be output from the first bus input/output interface to a first bus switch in the secondary loop, and then receives a sampling signal of a second bus switch from the second bus input/output interface, and by comparing the sine wave test signals with the sampling signal, detecting the wiring condition of the secondary circuit; when the secondary voltage parallel operation is carried out, the sampling current of the first bus input/output interface and the sampling current of the second bus input/output interface are subjected to phase checking, and the wiring of a secondary circuit is ensured to be correct.
Drawings
Fig. 1 is a first structural diagram of the automatic calibration apparatus for secondary voltage parallel loop according to the present invention.
Fig. 2 is a structural diagram of a test voltage generation module in the automatic calibration apparatus for secondary voltage parallel circuit of the present invention.
Fig. 3 is a second structural diagram of the automatic calibration apparatus for secondary voltage parallel circuit of the present invention.
Detailed Description
The technical scheme and the technical effect of the utility model are further elaborated in the following by combining the drawings of the utility model.
As shown in fig. 1, the present invention provides an automatic calibration apparatus for a secondary voltage parallel circuit, comprising: the device comprises a main controller 1, a first bus input/output interface 2, a second bus input/output interface 3, a touch display module 4, a test voltage generation module 5, an early warning indicator lamp 6, a manual phase angle adjusting assembly 7, a nuclear phase module 8, a wireless signal transceiver 9, a power supply module 10, a secondary voltage parallel module 11 and a working mode switching key 12, wherein the main controller 1, the first bus input/output interface 2, the second bus input/output interface 3, the touch display module 4, the test voltage generation module 5, the early warning indicator lamp 6, the nuclear phase module 8, the wireless signal transceiver, the power supply module, the secondary voltage parallel module 11 and the working mode switching key 12 are electrically connected with the main controller 1, and the power supply module 10 is used for supplying power to all electrical appliances.
The working modes of the automatic secondary voltage parallel loop checking device comprise a loop detection working mode and a secondary bus voltage parallel working mode, and the automatic and manual switching working modes are supported, a working mode switching key 12 is positioned on the shell of the automatic secondary voltage parallel loop checking device and can support the manual switching working mode, and when the port of the main controller 1 connected with the working mode switching key 12 is at a high level, the secondary voltage parallel module 11 is powered off and is in a non-working state; when the port of the main controller 1 connected to the operating mode switching key 12 is at a low level, the test voltage generation module 5 is powered down and is in a non-operating state. The process of automatically switching the working modes is that the main controller 1 firstly runs the loop detection working mode and then automatically jumps to the secondary bus voltage parallel working mode.
The test voltage generation module 5 comprises three groups of test voltage generation circuits, each group of test voltage generation circuits consists of a sine wave generator 51 and a phase adjustment circuit 52, wherein the sine wave generator 51 is connected with an input terminal of the phase adjustment circuit 52, and an output terminal of the phase adjustment circuit 52 is connected with the nuclear phase module 8 and the first bus input/output interface 2; as shown IN fig. 2, the phase adjusting circuit is composed of a first operational amplifier U1, a second operational amplifier U2, a single chip microcomputer U3 for digitally controlling the value of the resistance, a variable resistor for manually adjusting the value of the resistance, an input terminal and an output terminal, a sine wave signal generated by a sine wave generator is input to the phase adjusting circuit through the input terminal, the input terminal is connected IN series to the-IN end of U1, the + IN end of U1 is grounded, the OUT end of U1 is connected to the + IN end of U2 and the-IN end of U2, and the-IN end of U2 is connected IN series with the value resistor and then connected to the second end of the selector. The singlechip U3 is connected to the first end of selector, and the variable resistor is connected to the third end of selector, and output terminal is connected to the OUT of U2, and the second end of selector switches on with other both ends alternatives, and when first end and second end switched on, accessible singlechip U3 carried OUT numerical control resistance value, and when third end and second end switched on, the accessible variable resistor carried OUT manual resistance value of transferring to change the phase angle of sinusoidal wave through adjusting the resistance value. The amplitude range of the sine wave output by the sine wave generator 51 can be 0-36V, the sine wave with the phase angle value range of 0-180 degrees can be obtained through the singlechip U3 or the variable resistor, and three groups of sine waves with any phase angle and any amplitude can be obtained through the test voltage generation module 5 to be used as test signals for testing the wiring condition of the secondary circuit.
When the variable resistor used by the phase adjusting circuit 52 is a sliding resistor, the manual phase angle adjusting assembly 7 includes three adjusting sliders configured with sliding rails, and the three adjusting sliders are located at the housing of the automatic calibration device of the secondary voltage parallel loop, and are respectively connected to the sliders of the variable resistor of the phase adjusting circuit in the three groups of test voltage generating circuits in a transmission manner.
The first bus input/output interface 2 includes a first a-phase voltage interface, a first B-phase voltage interface, a first C-phase voltage interface, and a first zero-phase voltage interface, as shown in fig. 3, three output ports of the three groups of test voltage generating circuits are respectively and correspondingly connected to the first a-phase voltage interface, the first B-phase voltage interface, and the first C-phase voltage interface, three groups of test signals are respectively output to the first bus switch through the first a-phase voltage interface, the first B-phase voltage interface, and the first C-phase voltage interface, and then flow to the second bus switch through the secondary loop, and the second bus input/output interface 3 includes a second a-phase voltage interface, a second B-phase voltage interface, a second C-phase voltage interface, and a second zero-phase voltage interface, the second bus input/output interface 3 is connected to the second bus switch, and is used for obtaining a sampling signal from the second bus switch, and the sampling signal is from the second a-phase voltage interface, the first C-phase voltage interface, and the second phase voltage interface, And the second B-phase voltage interface and the second C-phase voltage interface are input.
The three groups of test signals and sampling signals are input into the phase checking module 8, the phase checking module 8 checks the phase, and if the comparison result shows that the phase angles are consistent, the secondary loop is correct in wiring, and no hidden troubles of virtual connection and wrong connection exist.
The secondary voltage parallel module 11 comprises a primary isolating switch, two primary isolating switches and a parallel switch which are connected in sequence, wherein the primary isolating switch, the two primary isolating switches and the parallel switch are all three-phase switches, the primary isolating switch is connected between the first bus input/output interface 2 and the parallel switch, and the two primary isolating switches are connected between the second bus input/output interface 3 and the parallel switch. When the bus voltage parallel operation mode runs in a secondary bus voltage parallel operation mode, the first bus and the second bus are actually run, a first bus sampling signal from the first bus switch is input into the first bus input/output interface 2, a second bus sampling signal from the second bus switch is input into the second bus input/output interface 3, the phase checking module 8 is used for checking the phase of the first bus sampling signal and the second bus sampling signal, when the phase checking result is that the phase angle is consistent, the current secondary circuit is correct in wiring, no hidden danger of virtual connection and wrong connection exists, parallel operation can be performed, firstly, the first bus isolating switch is switched on, the second bus isolating switch is switched on, and finally, the parallel operation of the secondary buses is completed.
The phase checking module 8 is used for checking that the phase checking results of the voltage signal flowing through the first bus input and output interface 2 and the voltage signal flowing through the second bus input and output interface 3 are inconsistent, and the early warning prompt lamp 6 is turned on to prompt that professional personnel need to process the signals.
Furthermore, the automatic calibration device for the secondary voltage parallel loop can also comprise an anti-interference component which resists vibration and/or electromagnetic interference and is used for preventing the sine wave signal from being interfered in the test process, and the anti-interference component is electrically connected with the main controller 1.
Furthermore, the automatic calibration device for the secondary voltage parallel loop can also comprise a GPS time synchronization device, and is used for accurately synchronizing time when the phase checking module records the sampling waveform, so that the precision of the comparison result is improved. The GPS time synchronization device is electrically connected with the main controller 1.
Furthermore, the automatic calibration device for the secondary voltage parallel loop can also comprise a reset key, and the reset key main controller 1 is electrically connected.
Furthermore, the automatic calibration device for the secondary voltage parallel loop can further comprise a wireless signal transceiver, which can be a bluetooth module, an infrared transceiver module, a wifi module and the like, is connected to the main controller 1, and is used for reporting a phase checking result and a voltage parallel success signal.
It can be known from the above technical solutions that the automatic calibration apparatus for secondary voltage parallel loop provided in the embodiments of the present invention is composed of a main controller, a first bus input/output interface, a second bus input/output interface, a touch display module, a test voltage generation module, an early warning lamp, a manual phase angle adjustment component, a nuclear phase module, a wireless signal transceiver, a power supply module, a secondary voltage parallel module and a working mode switching key, wherein before the secondary voltage parallel operation, the test voltage generation module generates three groups of sine wave test signals with any phase angle and amplitude to be output from the first bus input/output interface to a first bus switch in the secondary loop, and then receives a sampling signal of a second bus switch from the second bus input/output interface, and by comparing the sine wave test signals with the sampling signal, detecting the wiring condition of the secondary circuit; when the secondary voltage parallel operation is carried out, the sampling current of the first bus input/output interface and the sampling current of the second bus input/output interface are subjected to phase checking, and the wiring of a secondary circuit is ensured to be correct.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a secondary voltage parallel circuit automatic check device which characterized in that includes: the device comprises a main controller, a first bus input/output interface, a second bus input/output interface, a touch display module, a test voltage generation module, an early warning prompt lamp, a manual phase angle adjusting assembly, a nuclear phase module, a wireless signal transceiver, a power supply module, a secondary voltage parallel module and a working mode switching key, wherein the main controller, the first bus input/output interface, the second bus input/output interface, the touch display module, the test voltage generation module, the early warning prompt lamp, the nuclear phase module, the wireless signal transceiver, the power supply module, the secondary voltage parallel module and the working mode switching key are all electrically connected with the main controller, and the power supply module is used for supplying power to all electrical appliances;
the test voltage generation module comprises three groups of test voltage generation circuits, each test voltage generation circuit comprises a sine wave generator and a phase adjustment circuit, the sine wave generator is connected with an input terminal of the phase adjustment circuit, and an output terminal of the phase adjustment circuit is connected with the phase checking module and the first bus input/output interface;
the three output ports of the three groups of test voltage generating circuits are respectively and correspondingly connected with the first A phase voltage interface, the first B phase voltage interface and the first C phase voltage interface;
the second bus input and output interface comprises a second A phase voltage interface, a second B phase voltage interface, a second C phase voltage interface and a second zero phase voltage interface; the second bus input/output interface is connected with the nuclear phase module;
the manual phase angle adjusting component is connected with the test voltage generating circuit.
2. The automatic checking device of secondary voltage parallel loop according to claim 1, wherein the phase adjusting circuit is composed of a first operational amplifier U1, a second operational amplifier U2, a single chip microcomputer U3 for digitally adjusting resistance value, a variable resistor for manually adjusting resistance value, an input terminal and an output terminal: the sine wave signal generated by the sine wave generator is input to the phase adjusting circuit through the input terminal, the input terminal is connected to the-IN end of the U1 IN series, the + IN end of the U1 is grounded, the OUT end of the U1 is connected to the + IN end of the U2 and the-IN end of the U2, the-IN end of the U2 is connected with a constant-value resistor IN series and then connected to the second end of the selector, the first end of the selector is connected with the single chip microcomputer U3, the third end of the selector is connected with the variable resistor, the OUT end of the U2 is connected with the output terminal, and the second end of the selector is alternatively connected with the other two ends.
3. The automatic secondary voltage parallel loop checking apparatus according to claim 2, wherein said manual phase angle adjusting assembly includes three adjusting sliders configured with sliding rails, said three adjusting sliders being respectively connected to sliders of variable resistors of said phase adjusting circuit of said three sets of said test voltage generating circuits in a driving manner.
4. The automatic calibration device for secondary voltage parallel loop according to claim 1, further comprising an anti-interference component for anti-vibration and/or anti-electromagnetic interference, wherein the anti-interference component is electrically connected to the main controller.
5. The automatic calibration device for secondary voltage parallel loop according to claim 1, further comprising a GPS time-setting device electrically connected to the main controller.
6. The automatic calibration device for secondary voltage parallel loop according to claim 1, wherein the secondary voltage parallel module comprises a female isolating switch, two female isolating switches and a parallel switch which are connected in sequence, the female isolating switch, the two female isolating switches and the parallel switch are all three-phase switches, the female isolating switch is connected between the first bus input/output interface and the parallel switch, and the two female isolating switches are connected between the second bus input/output interface and the parallel switch.
7. The automatic checking device for the secondary voltage parallel loop according to claim 1, wherein the working modes of the automatic checking device for the secondary voltage parallel loop comprise a loop detection working mode and a secondary bus voltage parallel working mode, and when the port of the main controller connected with the working mode switching key is at a high level, the secondary voltage parallel module is powered off and is in a non-working state;
when the port of the main controller connected with the working mode switching key is at a low level, the test voltage generation module is powered down and is in a non-working state.
8. The automatic calibration device for secondary voltage parallel loop according to claim 1, wherein the phase checking module checks that the voltage signal flowing through the first bus input/output interface and the voltage signal flowing through the second bus input/output interface are inconsistent, and the warning indicator light is turned on.
9. The automatic calibration device for secondary voltage parallel circuit according to claim 1, further comprising a reset button, wherein the reset button is electrically connected to the main controller.
10. The automatic checking device for secondary voltage parallel loop as claimed in claim 1, wherein the amplitude of the output voltage of the output port of the test voltage generating circuit is in the range of 0-36V, and the phase angle of the output voltage of the output port of the test voltage generating circuit is in the range of 0-180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122522350.2U CN216209820U (en) | 2021-10-20 | 2021-10-20 | Automatic checking device for secondary voltage parallel loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122522350.2U CN216209820U (en) | 2021-10-20 | 2021-10-20 | Automatic checking device for secondary voltage parallel loop |
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| Publication Number | Publication Date |
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| CN216209820U true CN216209820U (en) | 2022-04-05 |
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| CN202122522350.2U Active CN216209820U (en) | 2021-10-20 | 2021-10-20 | Automatic checking device for secondary voltage parallel loop |
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| CN (1) | CN216209820U (en) |
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- 2021-10-20 CN CN202122522350.2U patent/CN216209820U/en active Active
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