CN220525958U - Intelligent experimental platform for vacuum circuit breaker on column - Google Patents
Intelligent experimental platform for vacuum circuit breaker on column Download PDFInfo
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- CN220525958U CN220525958U CN202321753568.1U CN202321753568U CN220525958U CN 220525958 U CN220525958 U CN 220525958U CN 202321753568 U CN202321753568 U CN 202321753568U CN 220525958 U CN220525958 U CN 220525958U
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Abstract
The utility model discloses an intelligent experimental platform of a vacuum circuit breaker on a column, which relates to the field of electric equipment experiments, wherein a plurality of groups of experimental equipment are arranged on the intelligent experimental platform, each group of experimental equipment comprises a PLC (1), a touch screen (2), a power supply system (3), a temperature detection unit (4), a motor current detection unit (5), a weak signal conditioning unit (6), a transformer transformation ratio detection unit (7), an energy storage and switching-on/off control unit (8), a column break action fault diagnosis unit (9), a column break secondary wiring and assembly error diagnosis unit (10) and related electric elements. According to the utility model, one experiment platform can realize related intelligent automatic detection and running-in experiments for a plurality of circuit breakers, and can perform error diagnosis and alarm according to actual conditions, so that a person is not required to watch, and the safety and efficiency of the experiments and the detection are greatly improved.
Description
Technical Field
The utility model relates to the field of electric equipment experiments, in particular to an intelligent experiment platform for a column vacuum circuit breaker.
Background
In order to ensure the product quality before leaving the factory, the vacuum circuit breaker on the column can perform relevant detection and experiments on each product, such as running-in experiments, transformer transformation ratio and polarity detection, high-low voltage experiments and the like. After the new product is developed, the product performance is required to be touched, and the conditions of refusing to open and refusing to close are high in frequency and easy to burn open and close coils due to the unstable performance of the new product. Most of factories have relatively simple and crude existing related equipment, lack of necessary protection measures, need special personnel to watch in running-in experiments, lack of necessary information recording and state monitoring functions, are prone to equipment failure and even cause safety accidents, and threaten personal safety and equipment safety of operators.
In addition, various detecting instruments only have single functions, are high in price, and have complicated and low-efficiency processes because different instruments need to be operated for detecting different characteristics. Taking the measurement of the polarity and transformation ratio of the current transformer and the zero sequence transformer as an example, the polarity and transformation ratio of the current transformer and the zero sequence current transformer are the items which are necessary to be checked before each breaker leaves the factory, and staff is required to change lines, short circuit and modify instrument parameters continuously during the detection, so that the operation process is complicated and the misoperation probability is high.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an intelligent experimental platform for the vacuum circuit breaker on the column, wherein one experimental platform can realize related intelligent automatic detection and running-in experiments for a plurality of circuit breakers, and can perform error diagnosis and alarm according to actual conditions without being attended by a special person, thereby greatly improving the safety and efficiency of the experiment and detection.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
an intelligent experimental platform of a vacuum circuit breaker on a column is provided with a plurality of groups of experimental equipment, each group of experimental equipment comprises a PLC (programmable logic controller), a touch screen, a power supply system, a temperature detection unit, a motor current detection unit, a weak signal conditioning unit, a transformer transformation ratio detection unit, an energy storage and switching-on/off control unit, a column breaking action fault diagnosis unit, a column breaking secondary wiring and assembly error diagnosis unit and related electrical elements, the power supply system supplies power for each element of the platform, the touch screen is connected with the PLC, the functions of switching action, parameter setting, state display and alarm display are realized, the temperature detection unit and the motor current detection unit are respectively connected with the signal input end of the PLC, the temperature and current detection of an energy storage motor are realized, the transformer transformation ratio detection unit is connected with the signal input end of the PLC, the three-phase current transformer and the zero-sequence current transformer transformation ratio detection are realized, the weak signal conditioning unit is connected with the signal input end of the PLC, the polarity detection of the current transformer is realized, the energy storage and the switching-on/off control unit is connected with the PLC signal, the automatic switching-on/off and automatic switching-on/off experiment and the automatic switching-on/off function of the circuit breaker on/off and the fault diagnosis unit on/off action fault diagnosis unit on the column, the column breaking action fault diagnosis unit and the PLC are respectively realized, the fault diagnosis unit and the fault diagnosis unit on the column breaking action and the connection of the column and the switching-on/off action of the circuit breaker and the circuit is realized.
The polarity detection of the current transformer is that a direct current pulse with the amplitude of 2.5A flows through a main circuit of the circuit breaker, the generated forward and reverse voltage signals are filtered and amplified through a weak signal conditioning unit, then the voltage signals generated in the rising edge stage and the falling edge stage of the direct current of the main circuit of the circuit breaker are input into corresponding PLC switching value input ports through voltage comparison, and the PLC judges the polarity of the transformer according to the current change time sequence of the main circuit and the switching value signal change of the corresponding ports.
The transformer transformation ratio detection unit measures the effective value of the current transformer current flowing through the Hall element, carries out on-site digital conversion and transmission to the PLC, and detects the transformer transformation ratio of the current transformer through the ratio of the effective value of the secondary current.
The column breaking action fault diagnosis unit is set to start timing when the closing coil of the circuit breaker is electrified, and when the electrified time is more than 0.5 seconds, the PLC still does not detect an on-off in-place signal, and the experiment platform system diagnoses on-off faults and alarms.
The column break secondary wiring and assembly error diagnosis unit comprises an auxiliary switch loop wiring error, an aviation plug falling off, a switch opening and closing and an energy storage state feedback loop wiring error:
a 'wiring completion' button is designed on the touch screen, when the aerial plug is in place, the button can be used for the next step, when the 'wiring completion' button is clicked, the experiment platform sends 24V voltage to the aerial plug 19 pins, when the experiment platform does not receive a switching-on and switching-off position feedback signal within 0.5 seconds, or simultaneously receives the switching-on and switching-off position feedback signal, the abnormality of a switching-on and switching-off state feedback loop can be diagnosed, and the PLC timely controls the system of the experiment platform to alarm in a power-off manner;
when the aviation plug vibration falls off, the situation that the feedback signal of the opening and closing position cannot be received by the experimental platform also occurs, and the PLC timely controls the power-off alarm of the experimental platform system;
setting a relevant color change rule on relevant opening and closing and energy storage buttons on the touch screen, and when corresponding feedback signals are received, converting corresponding colors by the corresponding buttons, and detecting wiring errors by operators according to the colors and the actual state of the circuit breaker;
after the aviation plug and the external wiring are finished, clicking a transformer detection button on the touch screen, performing zero sequence transformer polarity detection, zero sequence transformer transformation ratio detection, three-phase current transformer polarity detection and three-phase current transformer transformation ratio detection, detecting abnormal conditions in the detection process, automatically terminating the detection, alarming, and judging whether wiring errors exist or not by an operator according to the current transformer transformation ratio and the polarity information displayed by the touch screen.
The utility model designs an intelligent experimental platform for the on-column vacuum circuit breaker, which integrates multiple functions of direct-current voltage detection, automatic voltage regulation, automatic running-in experiment, automatic reclosing running-in experiment, transformer transformation ratio and polarity detection, energy storage motor protection, opening and closing coil protection, secondary control and detection line wiring error diagnosis into a whole by utilizing PLC control, and realizes multiple functions of switching action, parameter setting, state display and alarm display by virtue of network communication of the PLC and a touch screen.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present utility model.
Detailed Description
The utility model is described in detail below with reference to the attached drawings and the specific embodiments:
as shown in fig. 1, this on-column vacuum circuit breaker intelligent experiment platform, set up a plurality of experimental facilities on the intelligent experiment platform, every group experimental facility includes PLC1, touch-sensitive screen 2, electrical power generating system 3, temperature detection unit 4, motor current detection unit 5, weak signal conditioning unit 6, mutual-inductor transformation ratio detection unit 7, energy storage and divide-shut brake control unit 8, post break action fault diagnosis unit 9, post break secondary wiring and assembly error diagnosis unit 10 and relevant electrical components, electrical power generating system 3 is each component power supply of platform, touch-sensitive screen 2 is connected with PLC1, realizes switching action, parameter setting, status display, warning display function, temperature detection unit 4, motor current detection unit 5 are connected with PLC 1's signal input part respectively, realize temperature and current detection to the energy storage motor, mutual-inductor transformation ratio detection unit 7 is connected with PLC1 signal input part, realizes three-phase current transformer and zero sequence current transformer transformation ratio detection, weak signal conditioning unit 6 is connected with PLC1 signal input part, realizes current transformer polarity detection, energy storage and divide-shut brake control unit 8 and automatic connection of the post break action, the automatic diagnosis of the post break action of the error diagnosis unit and the fault diagnosis of the post break action on-off and the post break action error diagnosis unit 10, the automatic connection of the post break action error diagnosis of the post break action on-off and the post break-off action on-off connection, the automatic connection of the post and the PLC1, the fault diagnosis of the fault diagnosis unit is realized.
As a preferable mode, the polarity detection of the current transformer is that a direct current pulse with the amplitude of 2.5A flows in a main circuit of the circuit breaker, the generated forward and reverse voltage signals are filtered and amplified through a weak signal conditioning unit 6, and then the voltage signals generated in the rising edge stage and the falling edge stage of the direct current of the main circuit of the circuit breaker are input into corresponding PLC1 switching value input ports through voltage comparison, and the PLC1 judges the polarity of the transformer according to the current change time sequence of the main circuit and the switching value signal change of the corresponding ports. Therefore, the detection problem of the weak high-speed analog quantity signal is converted into the time sequence problem of the PLC1 standard switching value signal, and the detection stability and reliability are greatly improved.
In this embodiment, the weak signal conditioning unit 6 includes a signal filtering and amplifying circuit and a voltage comparing circuit. When the main circuit of the circuit breaker passes through the direct current pulse, irregular voltage signals of millisecond and microsecond levels are generated at the two ends of the transformer, and the analog quantity acquisition module of the PLC1 cannot stably detect the signals, so that a weak signal conditioning unit 6 is added to convert the signals, and the requirement that the PLC1 can detect relevant information of the signals is met. The filtering and amplifying circuit plays roles in filtering and amplifying weak signals, and the two paths of voltage comparator output ends generate a voltage signal with the amplitude of 24V and the pulse width of tens to tens of milliseconds at the rising edge stage and the falling edge stage of the direct current of the main circuit of the circuit breaker according to the polarity difference of the mutual inductor through the voltage comparison circuit, the voltage signal with the amplitude of 24V and the pulse width of tens to tens of milliseconds is sent to the corresponding PLC1 switching value input port, and the polarity of the mutual inductor can be judged by combining the switching value signal change of the corresponding port according to the current change time sequence of the main circuit.
In a preferred mode, in this embodiment, the transformer transformation ratio detecting unit 7 measures the effective value of the current transformer flowing through the hall element, digitally converts the effective value in situ, transmits the effective value to the PLC1, and detects the transformer transformation ratio of the current transformer by the ratio of the effective value of the secondary current, where the formula is N 2 /N 1 =I 1 /I 2 Wherein I 1 I 2 Is the effective value of the current of the main loop and the mutual inductor, N 2 /N 1 Is the transformation ratio of the current transformer.
In the preferred embodiment, the column breaking fault diagnosis unit 9 is configured to start timing when the closing coil of the circuit breaker is powered on, and when the power on time is greater than 0.5 seconds and the PLC1 still does not detect the in-place signal of opening and closing, the experiment platform system diagnoses the opening and closing fault and alarms.
The switching-on/off fault is one of common faults of the column vacuum circuit breaker, and the switching-on/off fault of the circuit breaker can lead to long-time energization of the switching-on/off coil. Because the design of the closing coil is designed according to short-time power-on, the long-time power-on of the closing coil can cause equipment damage and even safety accidents due to the fact that the closing coil is burnt out. In view of this, a closing coil protection function based on the opening and closing time is designed. Judging whether a closing fault occurs or not according to the closing action time, stopping experiments, powering off, alarming and not affecting the experiments by the rest of the circuit breakers if the closing fault occurs. The method comprises the following steps: and when the power-on time is more than 0.5 seconds and the system still does not detect an opening and closing in-place signal, the system diagnoses the opening and closing fault and gives an alarm. The switching-on and switching-off time of the vacuum circuit breaker on the column is generally tens to tens milliseconds and is far less than 0.5 seconds, and the coil cannot be burnt out when the coil is electrified for 0.5 seconds, so that the threshold value is suitable.
Specifically, the post-breaking secondary wiring and assembly error diagnosis unit 10 includes auxiliary switch circuit wiring errors, aviation plug falling off, switch opening and closing and energy storage state feedback circuit wiring errors, and the basic diagnosis principle is as follows: errors that can be diagnosed before power transmission are diagnosed as much as possible before power transmission; errors which can be diagnosed before the action of the circuit breaker can be diagnosed before the action as much as possible; the fault which can be diagnosed only through the action of the circuit breaker can be diagnosed quickly and timely without damaging components, and personal safety and equipment safety are ensured.
Specifically, a 'wiring completion' button is designed on the touch screen 2, after the aerial plug is in place, the button is needed to be used for carrying out the next step, when the 'wiring completion' button is clicked, the experiment platform sends 24V voltage to the aerial plug 19 pins (remote signaling public ends), when the experiment platform does not receive an opening and closing position feedback signal or receives an opening and closing position feedback signal at the same time within 0.5 seconds (the 0.5 seconds is used for crossing the switching time difference of the auxiliary switch when the circuit breaker acts), the abnormality of an opening and closing state feedback loop can be diagnosed, the PLC1 timely controls the power-off alarm of the experiment platform system, and the purpose that the corresponding abnormality is detected before the mechanism sends the point is achieved.
Specifically, when the aviation plug vibration drops, the situation that the feedback signal of the opening and closing position can not be received by the experimental platform can also occur, and the PLC1 timely controls the power-off alarm of the experimental platform system, so that the personal safety and the equipment safety are ensured.
Specifically, a relevant color change rule is set on the touch screen 2 through relevant opening and closing and energy storage buttons, and when corresponding feedback signals are received, corresponding buttons change corresponding colors, so that operators can conveniently detect wiring errors according to the colors and the actual state of the circuit breaker.
Specifically, after the aviation plug and the external wiring are completed, clicking a transformer detection button on the touch screen 2, judging whether energy storage and switching on are needed by the system according to the state of the circuit breaker, and after switching on, considering the conditions of safety factors, wire breakage abnormality and the like, performing zero sequence transformer polarity detection, zero sequence transformer transformation ratio detection, three-phase current transformer polarity detection and three-phase current transformer transformation ratio detection, detecting abnormal conditions in the detection process, automatically terminating detection, alarming, and judging whether wiring errors exist or not by an operator according to the current transformer transformation ratio and polarity information displayed by the touch screen 2.
The intelligent experiment table can control the vacuum circuit breakers on the plurality of columns to finish the actions of energy storage, closing and opening at one time, and realize reciprocating circulation to reach the set circulation times. In order to ensure the stable and safe operation of the running-in experiment of each breaker, a corresponding protection function is added.
The running-in experiment sequence of the vacuum circuit breaker on the single column is as follows:energy storage→Waiting for→Closing switch→Waiting for→Separating brake→Count plus 1→Waiting for→Energy storageAnd (5) circulating until the set times are reached, and automatically ending the experiment.
The action sequence of the reclosing running-in experiment of the vacuum circuit breaker on the single column is as follows:energy storage→Separating brake→Detecting the opening in place→Wait for 0.3 seconds→Closing switch→Detecting closing in place→Wait for 0.3 seconds→Separating brake→Detecting the opening in placeEnergy storage and combinationWait 180 Second of→Count plus 1→Wait 180 seconds→Energy storageAnd (5) circulating until the set times are reached, and automatically ending the experiment.
It should be understood that the above description is not intended to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the particular embodiments disclosed, and that the utility model is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the utility model.
Claims (5)
1. An intelligent experimental platform of a column vacuum circuit breaker is characterized in that a plurality of groups of experimental equipment are arranged on the intelligent experimental platform, each group of experimental equipment comprises a PLC (1), a touch screen (2), a power supply system (3), a temperature detection unit (4), a motor current detection unit (5), a weak signal conditioning unit (6), a transformer transformation ratio detection unit (7), an energy storage and switching-on control unit (8), a column breaking action fault diagnosis unit (9), a column breaking secondary wiring and assembly error diagnosis unit (10) and related electrical elements, the power supply system (3) supplies power for each element of the platform, the touch screen (2) is connected with the PLC (1) to realize the functions of switching action, parameter setting, state display and alarm display, the temperature detection unit (4) and the motor current detection unit (5) are respectively connected with the signal input end of the PLC (1) to realize the temperature and current detection of an energy storage motor, the transformer transformation ratio detection unit (7) is connected with the signal input end of the PLC (1) to realize the detection of the three-phase current transformer and the zero sequence current transformer transformation ratio, the signal conditioning unit (6) is connected with the signal input end of the PLC (1) to realize the automatic switching-on-off and switching-on of the automatic switching-off experiment device (8), the column breaking action fault diagnosis unit (9), the column breaking secondary wiring and assembly error diagnosis unit (10) are respectively connected with the PLC (1), so that automatic diagnosis and alarm of energy storage motor faults, switching-on and switching-off faults and secondary loop wiring errors in the running-in experiment process of the column breaker are realized.
2. The intelligent experimental platform for the pole-mounted vacuum circuit breaker according to claim 1, wherein the polarity detection of the current transformer is that a direct current pulse with the amplitude of 2.5A flows in a main circuit of the circuit breaker, the generated forward and reverse voltage signals are filtered and amplified through a weak signal conditioning unit (6), and then voltage signals generated in the rising edge stage and the falling edge stage of the direct current of the main circuit of the circuit breaker are input into corresponding switching value input ports of a PLC (1), and the polarity of the transformer is judged by combining the switching value signal change of the corresponding ports according to the current change time sequence of the main circuit by the PLC (1).
3. The intelligent experimental platform for the pole-mounted vacuum circuit breaker according to claim 1, wherein the transformer transformation ratio detection unit (7) measures the effective value of the current transformer current flowing through the Hall element, transmits the effective value to the PLC (1) through in-situ digital conversion, and detects the transformer transformation ratio of the current transformer through the ratio of a secondary current effective value.
4. The intelligent experimental platform for the pole-mounted vacuum circuit breaker according to claim 1, wherein the pole-mounted breaking action fault diagnosis unit (9) is set to start timing when a closing coil of the circuit breaker is powered on, and when the power on time is greater than 0.5 seconds, the experimental platform system diagnoses the breaking and closing fault and alarms when the PLC (1) still does not detect a breaking and closing in-place signal.
5. The intelligent experimental platform of the vacuum circuit breaker on the column according to claim 1, wherein the secondary wiring and assembly error diagnosis unit (10) comprises auxiliary switch loop wiring errors, aviation plug-in drop-off, switch opening and closing and energy storage state feedback loop wiring errors:
a 'wiring completion' button is designed on a touch screen (2), after the aerial plug is in place, the button is required to be used for carrying out the next step, when the 'wiring completion' button is clicked, the experiment platform sends 24V voltage to the aerial plug 19 pins, when the experiment platform does not receive an opening and closing position feedback signal within 0.5 seconds, or simultaneously receives the opening and closing position feedback signal, the abnormality of an opening and closing state feedback loop can be diagnosed, and the PLC (1) timely controls the power-off alarm of the experiment platform system;
when the aviation plug vibration falls off, the situation that the feedback signal of the opening and closing position cannot be received by the experimental platform also occurs, and the PLC (1) timely controls the power-off alarm of the experimental platform system;
setting a relevant color change rule on a relevant opening and closing and energy storage button on a touch screen (2), and when a corresponding feedback signal is received, converting corresponding colors of the corresponding buttons, and detecting wiring errors by an operator according to the colors and the actual state of a circuit breaker;
after the aviation plug and the external wiring are finished, clicking a transformer detection button on the touch screen (2), detecting the polarity of the zero sequence transformer, detecting the transformation ratio of the zero sequence transformer, detecting the polarity of the three-phase current transformer and detecting the transformation ratio of the three-phase current transformer, detecting abnormal conditions in the detection process, automatically terminating the detection, alarming, and judging whether wiring errors exist or not by an operator according to the transformation ratio and the polarity information of the current transformer displayed by the touch screen (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321753568.1U CN220525958U (en) | 2023-07-05 | 2023-07-05 | Intelligent experimental platform for vacuum circuit breaker on column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321753568.1U CN220525958U (en) | 2023-07-05 | 2023-07-05 | Intelligent experimental platform for vacuum circuit breaker on column |
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| CN220525958U true CN220525958U (en) | 2024-02-23 |
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| CN202321753568.1U Active CN220525958U (en) | 2023-07-05 | 2023-07-05 | Intelligent experimental platform for vacuum circuit breaker on column |
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2023
- 2023-07-05 CN CN202321753568.1U patent/CN220525958U/en active Active
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