CN112748328B - Monitoring circuit, electromagnetic repulsion mechanism and circuit breaker - Google Patents
Monitoring circuit, electromagnetic repulsion mechanism and circuit breaker Download PDFInfo
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- CN112748328B CN112748328B CN201911050580.4A CN201911050580A CN112748328B CN 112748328 B CN112748328 B CN 112748328B CN 201911050580 A CN201911050580 A CN 201911050580A CN 112748328 B CN112748328 B CN 112748328B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 60
- 238000012544 monitoring process Methods 0.000 title claims abstract description 59
- 239000003990 capacitor Substances 0.000 claims abstract description 94
- 238000005070 sampling Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
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- 230000000750 progressive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention provides a monitoring circuit, an electromagnetic repulsion mechanism and a circuit breaker, which are applied to the technical field of power electronics, wherein the monitoring circuit comprises: the input end of the first voltage sensor is connected with the switching-off pulse capacitor in parallel; the input end of the second voltage sensor is connected with the switching-on pulse capacitor in parallel, and the output ends of the first voltage sensor and the second voltage sensor are respectively connected with the controller. The controller acquires a first voltage value fed back by the first voltage sensor and a second voltage value fed back by the second voltage sensor, and sends alarm information under the condition that any one of the first voltage value and the second voltage value exceeds a preset voltage range. Through the circuit, the real-time monitoring of the opening pulse capacitor and the closing pulse capacitor can be realized, and when the pulse capacitor fails or a corresponding circuit goes wrong, alarm information can be sent timely, so that a reference basis is provided for the overhaul work of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a monitoring circuit, an electromagnetic repulsion mechanism and a circuit breaker.
Background
The high-voltage direct current circuit breaker is mainly divided into a mechanical direct current circuit breaker and a hybrid direct current circuit breaker, and in order to realize the purpose of rapidly breaking current, the mechanical switch arranged in the circuit breaker is required to have the capability of completing the breaking operation within 1-3 ms, and extremely high requirements are provided for an operating mechanism of the mechanical switch.
Among many operating mechanisms, an electromagnetic repulsion mechanism based on the principle of eddy-current repulsion is widely used because of its excellent action performance. The electromagnetic repulsion mechanism performs pulse discharge on the repulsion coil through the pre-charged pulse capacitor, generates electromagnetic repulsion in the repulsion disc so as to finish closing operation or opening operation, has the characteristics of simple structure, short mechanical delay time and high initial movement speed, and can well match the speed requirement of the high-voltage direct-current circuit breaker on the operating mechanism.
The pulse capacitor is used as an important element of the electromagnetic repulsion mechanism, and the normal operation of the pulse capacitor is the guarantee of the reliable action of the electromagnetic repulsion mechanism. However, the prior art still lacks an effective technical solution capable of controlling and managing the operation state of the pulse capacitor.
Disclosure of Invention
The invention provides a monitoring circuit, an electromagnetic repulsion mechanism and a controller, which can timely acquire the running state of a pulse capacitor and provide a reference basis for overhauling work of a circuit breaker.
In order to achieve the above purpose, the technical scheme provided by the application is as follows:
In a first aspect, the present invention provides a monitoring circuit, applied to an electromagnetic repulsion mechanism of a circuit breaker, the electromagnetic repulsion mechanism includes a switching-off pulse capacitor and a switching-on pulse capacitor, the monitoring circuit includes: a first voltage sensor, a second voltage sensor and a controller, wherein,
The input end of the first voltage sensor is connected with the switching-off pulse capacitor in parallel;
The input end of the second voltage sensor is connected with the switching-on pulse capacitor in parallel;
The output ends of the first voltage sensor and the second voltage sensor are respectively connected with the controller;
The controller acquires a first voltage value fed back by the first voltage sensor and a second voltage value fed back by the second voltage sensor, and if any one of the first voltage value and the second voltage value exceeds a preset voltage range, alarm information is sent.
Optionally, the monitoring circuit provided in the first aspect of the present invention further includes: a first charged display and a second charged display, wherein,
The first charge display is connected with the switching-off pulse capacitor in parallel;
The second electrified display is connected with the switching-on pulse capacitor in parallel.
Optionally, the monitoring circuit provided in the first aspect of the present invention further includes: a split micro-switch and a combined micro-switch, wherein,
The split micro switch is arranged at the limit position of the split motion of the electromagnetic repulsion mechanism;
the closing position micro switch is arranged at the limit position of closing movement of the electromagnetic repulsion mechanism;
the output ends of the split micro switch and the combined micro switch are respectively connected with the controller.
Optionally, the monitoring circuit provided in the first aspect of the present invention further includes: a travel sensor, wherein,
The travel sensor is connected with a motion pull rod of the electromagnetic repulsion mechanism;
And the output end of the stroke sensor is connected with the controller.
Optionally, the controller comprises a main control module and a capacitor voltage sampling module, wherein,
The input end of the capacitor voltage sampling module is respectively connected with the output ends of the first voltage sensor and the second voltage sensor;
and the output end of the capacitor voltage sampling module is connected with the main control module.
Optionally, the controller further includes: a position monitoring module, wherein,
The input end of the position monitoring module is respectively connected with the output ends of the split micro switch and the combined micro switch;
the output end of the position monitoring module is connected with the main control module.
Optionally, the controller further includes: a travel monitoring module, wherein,
The input end of the stroke monitoring module is connected with the output end of the stroke sensor;
And the output end of the travel monitoring module is connected with the main control module.
In a second aspect, the present invention provides an electromagnetic repulsion mechanism comprising: the drive circuit, the actuating mechanism and the monitoring circuit provided by any one of the first aspect of the invention, wherein the drive circuit comprises a power supply circuit, a switching-off drive circuit and a switching-on drive circuit,
The output end of the power supply circuit is respectively connected with the opening driving circuit and the closing driving circuit;
The actuating mechanism is driven by the opening driving circuit to execute opening operation or driven by the closing driving circuit to execute closing operation;
The input end of a first voltage sensor of the monitoring circuit is connected with a switching-off pulse capacitor in the switching-off driving circuit in parallel;
and the input end of the second voltage sensor of the monitoring circuit is connected with a closing pulse capacitor in the closing driving circuit in parallel.
Optionally, the controller is further connected to a power switch of the power supply circuit, a bleeder switch of the opening driving circuit, a driving switch of the opening driving circuit, a bleeder switch of the closing driving circuit, and a driving switch of the closing driving circuit, respectively.
In a third aspect, the present invention provides a circuit breaker comprising: a main current circuit and a transfer current circuit, the main current circuit and the transfer current circuit being connected in parallel, wherein,
The main current circuit comprises at least one fast switch, and the fast switch comprises the electromagnetic repulsion mechanism provided by any one of the second aspects of the invention.
The invention provides a monitoring circuit, which is applied to an electromagnetic repulsion mechanism comprising a switching-off pulse capacitor and a switching-on pulse capacitor in a circuit breaker, and comprises: the input end of the first voltage sensor is connected with the opening pulse capacitor in parallel and is used for collecting the voltage of the opening pulse capacitor; the input end of the second voltage sensor is connected with the closing pulse capacitor in parallel and used for collecting the voltage of the closing pulse capacitor, and the output ends of the first voltage sensor and the second voltage sensor are respectively connected with the controller and feed back the collected pulse capacitor voltage to the controller. The controller acquires a first voltage value fed back by the first voltage sensor and a second voltage value fed back by the second voltage sensor, and sends alarm information under the condition that any one of the first voltage value and the second voltage value exceeds a preset voltage range. The monitoring circuit provided by the invention can realize real-time monitoring of the opening pulse capacitor and the closing pulse capacitor, and can timely send alarm information when the pulse capacitor fails or a corresponding line goes wrong, so that a reference basis is provided for the overhaul work of the circuit breaker, and related personnel are reminded of timely overhauling the circuit breaker.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings may be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a monitoring circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a driving circuit of an electromagnetic repulsion mechanism according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, fig. 1 is a block diagram of a monitoring circuit according to an embodiment of the present invention, as shown in the drawings, the monitoring circuit according to the embodiment of the present invention includes: a controller 10, a first voltage sensor 20, a second voltage sensor 30, wherein,
The input end of the first voltage sensor 20 is connected with a switching-off pulse capacitor 40 in an electromagnetic repulsion mechanism of the circuit breaker in parallel, and the voltages at two ends of the switching-off pulse capacitor 40 are collected; the input end of the second voltage sensor 30 is connected in parallel with a closing pulse capacitor 50 in the electromagnetic repulsion mechanism of the circuit breaker, and the voltages at two ends of the closing pulse capacitor 50 are collected.
Further, the output ends of the first voltage sensor 20 and the second voltage sensor 30 are respectively connected to a preset input end of the controller 10, and voltage variation conditions of the opening pulse capacitor 40 and the closing pulse capacitor 50 are fed back to the controller 10.
The controller 10 obtains a first voltage value fed back by the first voltage sensor 20 and a second voltage value fed back by the second voltage sensor 30, and if any one of the first voltage value and the second voltage value exceeds a preset voltage range, that is, any one of the closing pulse capacitor 50 and the opening pulse capacitor 40 fails, the controller 10 sends alarm information.
Optionally, the controller 10 specifically includes a main control module (not shown in the figure) and a capacitor voltage sampling module (not shown in the figure), where an input end of the capacitor voltage sampling module is connected to output ends of the first voltage sensor 20 and the second voltage sensor 30 respectively, receives voltage values fed back by the corresponding voltage sensors, and an output end of the capacitor voltage sampling module is connected to the main control module, and feeds back and collects a first voltage value and a second voltage value to the main control module, and the main control module determines whether to send alarm information according to a relationship between the received first voltage value, the received second voltage value and a preset voltage range.
It should be noted that, the main control module and the capacitor voltage sampling module in the above-mentioned controller, and other controller forming modules mentioned below, may be constructed by a hardware circuit, and similarly, may also be implemented by brushing a control program with the same function in the microprocessor.
In the monitoring circuit provided by this embodiment, the first voltage sensor is connected in parallel to two ends of the opening pulse capacitor, the second voltage sensor is connected in parallel to two ends of the closing pulse capacitor, and meanwhile, the first voltage sensor and the second voltage sensor are connected with an input end of the capacitor voltage sampling module in the controller. The capacitor voltage sampling module carries out analog-to-digital conversion on voltage signals transmitted by the first voltage sensor and the second voltage sensor in real time, and transmits the digital quantity obtained by conversion to the main control module in the controller, the main control module processes the obtained signals, so that voltage values of the switching-off pulse capacitor and the switching-on pulse capacitor are obtained, when any voltage value exceeds a preset voltage range, alarm information is sent, and accordingly real-time monitoring of the switching-on pulse capacitor and the switching-off pulse capacitor is achieved, alarm can be given out timely when the switching-on pulse capacitor or the switching-off pulse capacitor fails or a circuit goes wrong, and operation and maintenance personnel are reminded of overhauling the repulsive force mechanism in time.
Optionally, the controller 10 may further be provided with a communication module (not shown in the figure), and the communication module is responsible for sending the alarm information to a preset upper system.
Optionally, the monitoring circuit provided in the embodiment of the present invention is further provided with a first live display 60 and a second live display 70. Specifically, the first charge display 60 is connected in parallel with the switching pulse capacitor 40, and is used for feeding back the charging condition of the switching pulse capacitor; the second live display 70 is connected in parallel with the closing pulse capacitor 50 for feeding back the live condition of the closing pulse capacitor. When the voltage of the corresponding pulse capacitor is reduced below the safety voltage, the indicator lamp of the corresponding electrified display is extinguished, and an operation and maintenance person can clearly judge whether the electric energy stored in the corresponding pulse capacitor is released or not through the indicator lamp of the electrified display, so that the maintenance safety is ensured.
Optionally, the monitoring circuit provided by the embodiment of the invention may further include a split micro switch (not shown in the figure), a combined micro switch (not shown in the figure), and a stroke sensor (not shown in the figure). The split micro switch is arranged at the limit position of the opening movement of the electromagnetic repulsion mechanism, the closing micro switch is arranged at the limit position of the closing movement of the electromagnetic repulsion mechanism, and the output ends of the split micro switch and the closing micro switch are respectively connected with the controller 10. Specifically, the controller 10 further includes a position monitoring module (not shown in the figure), where an input end of the position monitoring module is connected to output ends of the split micro switch and the combined micro switch, respectively, receives signals fed back by the split micro switch and the combined micro switch, processes the signals of the split micro switch and the combined micro switch, and then transmits the processed signals to the main control module, then the processed signals are transmitted to the communication module by the main control module, and finally the processed signals are transmitted to the upper system by the communication module in a feedback information form.
The stroke sensor is connected with the motion pull rod of the electromagnetic repulsion mechanism, the output end of the stroke sensor is connected with the controller, and particularly, the stroke sensor is connected with the input end of the stroke monitoring module arranged in the controller, and the stroke monitoring module transmits corresponding information to the main control module through the output end. The stroke monitoring module monitors output signals of the stroke sensor in real time, and records and transmits a change curve of the signals to the main control module for analysis when the output signals of the stroke sensor change rapidly (namely, when the electromagnetic repulsion mechanism acts). The main control module compares and analyzes the change curve with a pre-stored curve, and when the deviation between the change curve and the pre-stored curve exceeds a set range, the main control module judges that the electromagnetic repulsion mechanism possibly has fault risk and gives out corresponding early warning signals.
Optionally, the early warning signal and the fault curve can be transmitted to the upper system in a feedback signal mode through the communication module, so that a basis is provided for analyzing faults of the repulsive force mechanism by the system, and timely fault risk of the repulsive force mechanism is ensured to be found.
Optionally, the application of the present invention further provides an electromagnetic repulsion mechanism, which includes a driving circuit, an executing mechanism, and any one of the monitoring circuits provided in the embodiment shown in fig. 1, where the driving circuit includes a power supply circuit, a switching-off driving circuit, and a switching-on driving circuit.
Specifically, referring to fig. 2, fig. 2 is a circuit diagram of a driving circuit of an electromagnetic repulsion mechanism according to an embodiment of the present invention. The output end of the power supply circuit 100 is connected with the input ends of the opening driving circuit 200 and the closing driving circuit 300 respectively, that is, the opening driving circuit 200 and the closing driving circuit 300 are connected with the output end of the power supply circuit 100 in parallel, and receive the electric energy provided by the power supply circuit 100.
An actuator (not shown) of the electromagnetic repulsive force mechanism may perform the opening operation under the driving of the opening driving circuit 200 or the closing operation under the driving of the closing driving circuit 300.
An input end of a first voltage sensor (shown as U1 in the figure) of the monitoring circuit is connected in parallel with a switching-off pulse capacitor C1 in the switching-off driving circuit 200, and the working voltage of the switching-off pulse capacitor C1 is monitored; an input terminal of a second voltage sensor (shown as U2 in the figure) is connected in parallel with the closing pulse capacitor C2 in the closing driving circuit 300, and monitors an operation voltage of the closing pulse capacitor C2.
Further, a first live display (shown as DX1 in the figure) in the monitoring circuit is connected in parallel with the switching off pulse capacitor C1, and a second live display (shown as DX2 in the figure) is connected in parallel with the switching on pulse capacitor C2. The function of the first and second charged displays is as described previously and will not be repeated here.
Optionally, a controller (not shown in the figure) in the monitoring circuit is further connected to the power switch K1 of the power supply circuit 100 in the driving circuit, the bleeder switch K2 and the driving switch S1 in the opening driving circuit 200, and the bleeder switch K3 and the driving switch S2 in the closing driving circuit 300, respectively, and controls the actions of the switches according to the corresponding control instructions.
The following describes a control procedure of the electromagnetic repulsion mechanism provided in the embodiment of the present invention with reference to a circuit diagram shown in fig. 2.
When the electromagnetic repulsion mechanism provided by the embodiment works, the controller is used for controlling the power switch K1 to be closed, the bleeder switch K2 to be opened and the bleeder switch K3 to be opened, so that the rapid charging of the opening pulse capacitor C1 and the closing pulse capacitor C2 is realized, and the electricity supplementing operation after the pulse capacitor is leaked can be realized.
The first bleeder resistor R2 and the bleeder switch K2 in the opening driving circuit 200 are connected in series to form a serial branch, and the serial branch is integrally connected in parallel to two ends of the opening pulse capacitor C1; similarly, after the second bleeder resistor R3 is connected in series with the bleeder switch K3 in the closing driving circuit 300, the second bleeder resistor R3 is integrally connected in parallel to two ends of the closing pulse capacitor C2.
When the electromagnetic repulsion mechanism needs to be shut down and overhauled, the controller controls the power switch K1 to be opened, the release switch K2 to be closed and the release switch K3 to be closed, so that the release of the stored electric energy of the opening pulse capacitor C1 and the closing pulse capacitor C2 is realized. Meanwhile, the first charged display DX1 is connected with the opening pulse capacitor C1 in parallel, the second charged display DX2 is connected with the closing pulse capacitor C2 in parallel, when the voltage of each pulse capacitor is reduced below the safety voltage, the indicator lamp of the corresponding charged display is extinguished, and an maintainer can clearly judge whether the electric energy stored by the pulse capacitor is released or not through the indicator lamp of the charged display, so that the maintenance safety is ensured.
When an executing mechanism in the electromagnetic repulsion mechanism needs to be controlled to act, the controller receives a control command of an upper system and respectively controls the power switch K1, the bleeder switch K2 and the bleeder switch K3 after being processed by the main control module. Specifically, when the actuating mechanism needs to be controlled to execute the opening operation, the controller controls the power switch K1 to be closed and the release switch K2 to be opened, and simultaneously controls the driving switch S1 in the opening driving circuit 200 to be closed, the opening repulsive force coil is electrified, and then the actuating mechanism is driven to execute the opening operation; correspondingly, when the actuating mechanism needs to be controlled to execute the closing operation, the controller controls the power switch K1 to be closed and the release switch K3 to be opened, and simultaneously controls the driving switch S2 in the closing driving circuit 300 to be closed, the closing repulsive force coil is electrified, and then the actuating mechanism is driven to execute the closing operation.
The process of monitoring the working voltage of the opening pulse capacitor C1 by the monitoring circuit through the first voltage sensor U1 and the working voltage of the closing pulse capacitor C2 by the second voltage sensor U2 may be implemented by referring to the monitoring circuit in the embodiment shown in fig. 1, which is not described herein again.
In summary, by the electromagnetic repulsion mechanism provided by the embodiment of the invention, the intelligent monitoring of the electromagnetic repulsion mechanism can be realized on the basis of meeting the requirements of simple structure, quick action and the like of the existing electromagnetic repulsion mechanism, meanwhile, a fault alarm signal can be given when a pulse capacitor or a corresponding line fails, a reference basis can be provided for the overhaul of operation and maintenance personnel, and the safety of overhaul work is improved.
Optionally, an embodiment of the present invention further provides a circuit breaker, including: a main current circuit and a transfer current circuit, and the main current circuit and the transfer current circuit are connected in parallel, wherein,
The main current circuit comprises at least one fast switch, and the fast switch comprises the electromagnetic repulsion mechanism provided by the embodiment shown in fig. 2.
In the invention, each embodiment is described in a progressive manner, and each embodiment is mainly used for illustrating the difference from other embodiments, and the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (7)
1. A monitoring circuit, characterized in that is applied to the electromagnetic repulsion mechanism of circuit breaker, electromagnetic repulsion mechanism includes opening pulse capacitor and closing pulse capacitor, the monitoring circuit includes: a first voltage sensor, a second voltage sensor and a controller, wherein,
The input end of the first voltage sensor is connected with the switching-off pulse capacitor in parallel;
The input end of the second voltage sensor is connected with the switching-on pulse capacitor in parallel;
The output ends of the first voltage sensor and the second voltage sensor are respectively connected with the controller;
The controller acquires a first voltage value fed back by the first voltage sensor and a second voltage value fed back by the second voltage sensor, and if any one of the first voltage value and the second voltage value exceeds a preset voltage range, alarm information representing a fault of a closing pulse capacitor or a separating pulse capacitor is sent;
the monitoring circuit further includes: a travel sensor, wherein,
The travel sensor is connected with a motion pull rod of the electromagnetic repulsion mechanism;
The output end of the travel sensor is connected with the input end of a travel monitoring module arranged in the controller, the travel monitoring module monitors the output signal of the travel sensor in real time, and when the output signal of the travel sensor changes rapidly, the change curve of the signal is recorded and transmitted to the main control module for analysis; the main control module compares and analyzes the change curve with a pre-stored curve, and when the deviation between the change curve and the pre-stored curve exceeds a set range, the main control module judges that the electromagnetic repulsion mechanism has fault risk and gives out a corresponding early warning signal;
The early warning signal and the change curve are transmitted to an upper system in a feedback signal mode through a communication module;
wherein, the monitoring circuit still includes: a first charged display and a second charged display, wherein,
The first charge display is connected with the switching-off pulse capacitor in parallel and is used for feeding back the charge condition of the switching-off pulse capacitor;
the second electrified display is connected with the switching-on pulse capacitor in parallel and is used for feeding back the electrified condition of the switching-on pulse capacitor.
2. The monitoring circuit of claim 1, further comprising: a split micro-switch and a combined micro-switch, wherein,
The split micro switch is arranged at the limit position of the split motion of the electromagnetic repulsion mechanism;
the closing position micro switch is arranged at the limit position of closing movement of the electromagnetic repulsion mechanism;
the output ends of the split micro switch and the combined micro switch are respectively connected with the controller.
3. The monitoring circuit of claim 2, wherein the controller comprises a master control module and a capacitor voltage sampling module, wherein,
The input end of the capacitor voltage sampling module is respectively connected with the output ends of the first voltage sensor and the second voltage sensor;
and the output end of the capacitor voltage sampling module is connected with the main control module.
4. The monitoring circuit of claim 3, wherein the controller further comprises: a position monitoring module, wherein,
The input end of the position monitoring module is respectively connected with the output ends of the split micro switch and the combined micro switch;
the output end of the position monitoring module is connected with the main control module.
5. An electromagnetic repulsion mechanism, comprising: a drive circuit, an actuator, and the monitoring circuit of any one of claims 1-4, the drive circuit comprising a power supply circuit, a break-gate drive circuit, and a break-gate drive circuit, wherein,
The output end of the power supply circuit is respectively connected with the opening driving circuit and the closing driving circuit;
The actuating mechanism is driven by the opening driving circuit to execute opening operation or driven by the closing driving circuit to execute closing operation;
The input end of a first voltage sensor of the monitoring circuit is connected with a switching-off pulse capacitor in the switching-off driving circuit in parallel;
and the input end of the second voltage sensor of the monitoring circuit is connected with a closing pulse capacitor in the closing driving circuit in parallel.
6. The electromagnetic repulsion mechanism of claim 5, wherein the controller is further coupled to a power switch of the power supply circuit, a bleeder switch of the opening drive circuit, a drive switch of the opening drive circuit, a bleeder switch of the closing drive circuit, and a drive switch of the closing drive circuit, respectively.
7. A circuit breaker, comprising: a main current circuit and a transfer current circuit, the main current circuit and the transfer current circuit being connected in parallel, wherein,
The main current circuit comprises at least one fast switch, and the fast switch comprises the electromagnetic repulsion mechanism of any one of claims 5-6.
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| CN201911050580.4A CN112748328B (en) | 2019-10-31 | 2019-10-31 | Monitoring circuit, electromagnetic repulsion mechanism and circuit breaker |
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| CN201911050580.4A CN112748328B (en) | 2019-10-31 | 2019-10-31 | Monitoring circuit, electromagnetic repulsion mechanism and circuit breaker |
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| CN113488350B (en) * | 2021-07-16 | 2022-10-14 | 国网经济技术研究院有限公司 | Device and method for improving action judgment accuracy of vacuum switch of permanent magnet mechanism |
| CN113740725B (en) * | 2021-09-09 | 2023-05-16 | 广东电网有限责任公司 | Method and device for monitoring state of driving unit of repulsive force switch |
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