CN204332856U - A kind of high-voltage breaker permanent magnet electric operating mechanism driving governor - Google Patents
A kind of high-voltage breaker permanent magnet electric operating mechanism driving governor Download PDFInfo
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- CN204332856U CN204332856U CN201420710073.5U CN201420710073U CN204332856U CN 204332856 U CN204332856 U CN 204332856U CN 201420710073 U CN201420710073 U CN 201420710073U CN 204332856 U CN204332856 U CN 204332856U
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Abstract
The utility model provides a kind of high-voltage breaker permanent magnet electric operating mechanism driving governor, and comprise interconnective detection module and control module, described detection module is all connected with power module with described control module, and described control module connects transport module; Described control module comprises single-chip microcomputer and Drive and Control Circuit, and described transport module comprises switching value transmission unit and serial communication unit, and described detection module comprises condenser voltage testing circuit.This controling appliance, for communication function, can coordinate circuit breaker compositing area network, is controlled the divide-shut brake of circuit breaker by the host computer interface of Surveillance center, simultaneously the operation conditions of circuit breaker in monitoring network.There is driving force strong.Speed is fast, level capacitive is good, flexible and convenient to use, with low cost and reliability advantages of higher, should be widely promoted and use.
Description
Technical field
The utility model relates to power transmission and transforming equipment driving governor technical field, particularly relates to a kind of high-voltage breaker permanent magnet electric operating mechanism driving governor.
Background technology
Primary cut-out is most important control and protection equipment in electric power system.Operating mechanism controls the mechanism that circuit breaker carries out separating brake and closing operation.Operating mechanism relatively more conventional at present mainly contains electromagnetic operating mechanism, spring operating mechanism, pneumatic operating mechanism and hydraulic actuating mechanism etc.Permanent magnet motor controller is the core of permanent magnet motor operating mechanism, its performance directly affects the eliminating effect of fault and the reliably working of circuit breaker, because driving governor needs the high power discharge of moment, can impact internal component and disturb, driver receives the impact of the factors such as thunder and lightning, high-tension line, temperature, humidity in outside simultaneously.
Application number be 200610134094.7 patent of invention a kind of linear motor operating mechanism of high-voltage breaker is disclosed, belong to power transmission and transforming equipment technical field.Its structure includes linear electric motors and servo controller, and the moving contact of the secondary and primary cut-out of linear electric motors is connected by insulated tension pole, and linear electric motors are connected with servo controller with velocity transducer by the armature winding on it and position.Advantage of the present invention: mechanism's quality is little, and movement inertia is little, and kinetic energy reduces greatly, energy loss reduces, and most of energy has all been used on moving contact of breaker kinetic energy, improves the service efficiency of energy.And there is following features: volume is little, lightweight; Structure is simple, highly reliable; High efficiency, low energy consumption; Quick response and high accuracy; Motion process is controlled.
Application number is the drive circuit that the patent of invention of 201080065843.X discloses a kind of electromagnetic operating mechanism.Close making switch (14), the capacitor (11) after charging is utilized to carry out excitation to closed coil (5), drive movable core (2), during with closed not shown vacuum valve, if cut-off switch (24) and switch (28), even if then produce voltage because of the electromagnetic induction from coil (5) in coil (6), also not having electric current flows through, and can not produce power consumption.In addition, if make switch (18) close until switch (14) disconnects, the electric current then flowing through coil (5) when switch (14) disconnects can turn and flow to the series circuit (19) comprising resistance (17), therefore, can suppress the voltage occurred in coil (5).Close making switch (24), capacitor (21) is utilized to carry out excitation to disconnection coil (6), carry out reverse drive movable core (2), during to disconnect vacuum valve, disconnect by making switch (14) and switch (18), even if thus because of the electromagnetic induction from coil (6) at coil (5) middle generation voltage, also not having electric current flows through, and can not produce power consumption.
Above scheme; not to the driving governor of operating mechanism as clearly innovation and protection; for this important but link of fragility of driving governor; need to propose a kind of reasonable plan, make it have have that driving force is strong, speed is fast, level capacitive is good, flexible and convenient to use, with low cost and reliability advantages of higher.
Utility model content
The purpose of this utility model is to solve the problems of the technologies described above, a kind of high-voltage breaker permanent magnet electric operating mechanism driving governor is provided, possesses communication function, circuit breaker compositing area network can be coordinated, the divide-shut brake of circuit breaker is controlled, simultaneously the operation conditions of circuit breaker in monitoring network by the host computer interface of Surveillance center.
For achieving the above object, the technical scheme that the utility model adopts is: a kind of high-voltage breaker permanent magnet electric operating mechanism driving governor, comprise interconnective detection module and control module, described detection module is all connected with power module with described control module, and described control module connects transport module; Described control module comprises single-chip microcomputer and Drive and Control Circuit, and described transport module comprises switching value transmission unit and serial communication unit, and described detection module comprises condenser voltage testing circuit.
Described Drive and Control Circuit comprises divide-shut brake control module, and described divide-shut brake control module comprises voltage detection module, storage capacitor and device for power switching.
Described device for power switching is insulated gate bipolar transistor.
Described switching value transmission unit comprises On-off signal level shifting circuit and outputting circuit for relay.
Described power module comprises multi-channel switch power and voltage stabilizing circuit.
Described condenser voltage testing circuit comprises linear optical coupling.
Described serial communication unit comprises RS485 serial communication interface circuit.
There is following advantage in high-voltage breaker permanent magnet motor operation mechanism: moving component only has one, simple and reliable; Adopt capacitor as operating power, operation energy consumption is smaller, and efficiency is high; There is higher capability of fast response and higher precision, meet the characteristic requirements of vacuum circuit-breaker; Adopt modern control theory and the numerical control system based on microprocessor, accurately can control cut-offfing and closing the time of circuit breaker, according to predetermined curvilinear motion, can also easily can realize communication, Real-Time Monitoring and fault diagnosis functions.Because driver needs the high power discharge of moment, can impact internal component and disturb, driver receives the impact of the factors such as thunder and lightning, high-tension line, temperature, humidity in outside simultaneously, so relative to miscellaneous part, driver is important but very fragile link.
The working method of the utility model permanent magnet motor operating mechanism driver is divided into normal operating mode and failure operation mode, wherein, the controller of normal operating mode detects performance and the voltage of energy storage capacitor in real time, when voltage is lower than preset value, by power module be capacitor charging, otherwise then stop charging, monitor electrical network parameter and circuit-breaker status simultaneously, corresponding parameter display is exported; Failure operation mode is then carry out analyzing, judging to send corresponding operational order after comparing to preset data according to the failure condition real-time monitored, motor once only accepts separating brake or reclosing command, multiple signal can be avoided to input the misoperation causing mechanism simultaneously, improve mechanism reliability, corresponding failure code is issued host computer simultaneously.
A kind of magneto mechanism drive possessing communication function that the utility model is developed can coordinate circuit breaker compositing area network, in the network by the host computer interface of Surveillance center control circuit breaker point, close a floodgate, the simultaneously operation conditions of circuit breaker in monitoring network, driver adopts industrial conventional RS485 to communicate, there is very strong common mode disturbances restraint, and require simple to transmission medium physical layer, adopt common twisted-pair feeder just can network consisting.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the voltage stabilizing circuit figure of the utility model power module.
Fig. 3 is the On-off signal level shifting circuit figure of the utility model switching value transmission unit.
Fig. 4 is the outputting circuit for relay figure of the utility model switching value transmission unit.
Fig. 5 is the utility model serial communication interface circuit figure.
Embodiment
As shown in Figures 1 to 5, a kind of high-voltage breaker permanent magnet electric operating mechanism driving governor, comprise interconnective detection module 1 and control module 2, detection module 1 is all connected with power module 3 with control module 2, and control module 2 connects transport module 4; Control module 2 comprises single-chip microcomputer 5 and Drive and Control Circuit, and transport module comprises switching value transmission unit and serial communication unit 10, and detection module comprises condenser voltage testing circuit; Drive and Control Circuit comprises divide-shut brake control module 6, and divide-shut brake control module comprises voltage detection module 7, storage capacitor 8 and device for power switching 9; Device for power switching is insulated gate bipolar transistor, i.e. IGBT pipe; Switching value transmission unit comprises On-off signal level shifting circuit 11 and outputting circuit for relay 12; Power module comprises multi-channel switch power 13 and voltage stabilizing circuit 14; Condenser voltage testing circuit comprises linear optical coupling; Serial communication unit comprises RS485 serial communication interface circuit.
Controller normal work road voltage, and isolated between each road.Therefore this driver have employed multi-channel switch power and powers.In order to the external KA7805 voltage stabilizing circuit of the power good strengthening cpu circuit further, as shown in Figure 2.Wherein U is supply voltage, and Uo is controller supply power voltage.RI, R2 are output voltage regulating resistance.This voltage stabilizing circuit can realize output voltage continuously adjustabe joint in 5 one 12V voltage stabilized ranges.Precision can reach more than 0.04, can practical requirement, and other power supply directly takes from power module.
Control module comprises single-chip microcomputer and Drive and Control Circuit, and because control system is used in the operating mechanism of primary cut-out, its special working mechanism requires that real-time is stronger, particularly dividing, in making process.Accurate commutation control need be realized, as the core of whole control system.Microprocessor needs to have higher performance, to realize the real-time measurement of external signal and to reach sensitive control ability.Therefore classics 8 single-chip microcomputer PICl6F877 of the control chip Cai Pian Microchip company of driver, its inside is changed with several functions module: A/D, PWM controls, timer etc., be a kind of numerous function i ntegration to chip together, realize hardware circuit software implementation, reduce costs, improve system reliability.
Drive and Control Circuit mainly comprises voltage detection module, storage capacitor and device for power switching, and its operation principle is: driver carries out Real-Time Monitoring to storage capacitor voltage.If undertension, charge: the separating brake that control far away/nearly control or host computer transmit if receive or reclosing command, first judge whether the whether correct condenser voltage in the position of circuit breaker reaches preset value.Conform to, drive that IGBT carries out point, closing operation.When arrival point, closing position or to have exceeded point, the combined floodgate predetermined registration operation time then turns off IGBT immediately, stops dividing, closing operation, circuit breaker position is uploaded to host computer and display module.
In divide-shut brake control module, the transmission of electric energy between full bridge power circuit realiration power supply and motor coil, power circuit not only will have higher ability to bear to transient high-current, also will realize the electrical isolation with control circuit.Short owing to asking during the larger conducting of current amplitude when mechanism closes a floodgate, and point, have twice commutation in making process.Due to the impact that HF switch process and power main loop stray inductance superpose and instantaneous power consumption can be larger to device generation.Therefore the utility model adopts device for power switching IGBT to control the break-make of three-phase windings electric current.And the switching trace that RCD buffer circuit changes device is set.Control various transient overvoltage, reduce device switching loss, protection device safe operation.In IGBT turn off process.Electric capacity, by diode charging, is absorbed the instantaneous consumption that turn off process produces, after IGBT opens, is discharged by resistance R.Absorption diode must select fast recovery diode.Its rated current should be not less than 1/10th of main circuit rated current of devices, in addition.Line inductance should be reduced as far as possible.And the internal inductance Absorption Capacitance that little high frequency characteristics is good as far as possible should be selected.
As shown in Figure 3, be the On-off signal level shifting circuit figure of switching value transmission unit, On-off signal unit is used for accepting breaker operator order and shows.After action button is closed, the conducting of optocoupler primary side sends light signal.The conducting of optocoupler secondary side light, operation signal is made a gift to someone controller, when button disconnects, for the reverse self induction electromotive force in circuit provides a current path.Avoid the self induction electromotive force because producing too high and damage optocoupler.As shown in Figure 4, for the outputting circuit for relay figure of switching value transmission unit, switch amount output unit is used to indicate the running status of circuit breaker, overcurrent separating brake, decompression separating brake, and breaker operation mechanism failure alarm signal etc., in order to carry out electrical isolation with outside and possess certain driving force.Relay is adopted to export as I/O.Note at relay coil end inverse parallel afterflow diode, turn off to prevent relay the overvoltage scaling loss relay produced.
As shown in Figure 5, be serial communication interface circuit figure; Driver will upload to the status signal of the parameter of electrical network, capacitance voltage value, circuit breaker on the host computer of Control Room in time, because the distance of driver and Control Room is larger, so driver adopts industrial conventional Rs-485 to communicate with asking of Control Room, as a kind of interface of serial communication, there is transmission range length, speed is higher, level capacitive is good, flexible and convenient to use, with low cost and reliability advantages of higher, all have a wide range of applications in many fields such as intelligent management, On-line Control, geological prospectings.
Condenser voltage testing circuit comprises linear optical coupling.Permanent magnet motor operating mechanism utilizes capacitor to carry out energy storage.The capacity of energy storage capacitor and rated voltage are selected according to armature winding job requirement.Control chip changes the voltage of monitoring capacitor by A/D, if decompression, then software locking divide, switching signal.Forbid that mechanism divides, close a floodgate.If overvoltage, start corresponding protection.In order to realize the electrical isolation of forceful electric power and light current, energy storage capacitor can not have any electrical link with cpu circuit.Driver adopts model to be that the linear optical coupling of HCNR200 is to realize the isolation transmission of analog signal.Its linearity can reach 0.01%, isolation voltage is more than 3000V.Bandwidth is maximum reaches 1MHz, wherein condenser voltage observation circuit; An operational amplifier is respectively had the input end of HCNR200 and output.When variations in temperature is larger, the internal resistance in HCNR200 can produce larger change, by adding an operational amplifier u7A at input side, adopts oppositely input to compensate internal resistance in HCNR200, can effectively suppress temperature on its impact.Under linear optical coupling is operated in photovoltage pattern, the linearity can reach 12 precision, and operating frequency is 40kHz to the maximum.Voltage on energy storage capacitor passes through electric resistance partial pressure.Obtain the voltage signal that amplitude is less than 15V.This signal is input linear light-coupled isolation hop after follower drives.First the voltage signal exported at secondary side passes through RC circuit filtering high-frequency signal, then through ferrite bean L2 filtering digital noise, finally inputs A/D conversion chip.
The utility model controller adopts standard equilibration formula to send, and the data collector that differential type receives drives bus, has very strong common mode disturbances restraint.And strict requirement is not had to transmission medium physical layer, only just can network consisting with common twisted-pair feeder.Because driver is installed on the attack that outdoor whole system may suffer electrostatic impact or thunder and lightning, therefore can also be extraneous with esd protection functional interface chip MAX3443E, it can bear the electrostatic impact up to 15kV.DE and RE short circuit in the interface circuit of it and single-chip microcomputer PICl6F877 chip, time idle, RE is effective.
Practiced by concrete, permanent magnet motor operating mechanism driver of the present utility model, with PIC16F877 single-chip microcomputer for core constitutes a real-time industrial control system.Carry out real-time analysis, computing and process by from the voltage of electrical network collection, current data, realize multiple different protective feature.Carry out real-time display and communicate with host computer.Meet simultaneously and control the reliable separating brake of actuator and closing operation requirement, realize measuring, monitoring, protection also can with computer networking, form intelligentized monitor protective system.Improve the level of control of circuit breaker.
Claims (7)
1. a high-voltage breaker permanent magnet electric operating mechanism driving governor, is characterized in that: comprise interconnective detection module and control module, and described detection module is all connected with power module with described control module, and described control module connects transport module; Described control module comprises single-chip microcomputer and Drive and Control Circuit, and described transport module comprises switching value transmission unit and serial communication unit, and described detection module comprises condenser voltage testing circuit.
2. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 1, it is characterized in that: described Drive and Control Circuit comprises divide-shut brake control module, described divide-shut brake control module comprises voltage detection module, storage capacitor and device for power switching.
3. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 2, is characterized in that: described device for power switching is insulated gate bipolar transistor.
4. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 1, is characterized in that: described switching value transmission unit comprises On-off signal level shifting circuit and outputting circuit for relay.
5. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 1, is characterized in that: described power module comprises multi-channel switch power and voltage stabilizing circuit.
6. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 1, is characterized in that: described condenser voltage testing circuit comprises linear optical coupling.
7. high-voltage breaker permanent magnet electric operating mechanism driving governor as claimed in claim 1, is characterized in that: described serial communication unit comprises RS485 serial communication interface circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420710073.5U CN204332856U (en) | 2014-11-24 | 2014-11-24 | A kind of high-voltage breaker permanent magnet electric operating mechanism driving governor |
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| CN201420710073.5U CN204332856U (en) | 2014-11-24 | 2014-11-24 | A kind of high-voltage breaker permanent magnet electric operating mechanism driving governor |
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| CN204332856U true CN204332856U (en) | 2015-05-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702530A (en) * | 2014-11-24 | 2016-06-22 | 国网河南省电力公司平顶山供电公司 | High voltage circuit breaker permanent magnet motor actuator drive controller |
| CN107240532A (en) * | 2016-04-29 | 2017-10-10 | 上海良信电器股份有限公司 | Electric operating mechanism of circuit-breaker circuit |
| CN107833784A (en) * | 2017-11-07 | 2018-03-23 | 盐城博鸣信息科技有限公司 | A kind of control mechanism of vacuum circuit breaker control circuit |
-
2014
- 2014-11-24 CN CN201420710073.5U patent/CN204332856U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702530A (en) * | 2014-11-24 | 2016-06-22 | 国网河南省电力公司平顶山供电公司 | High voltage circuit breaker permanent magnet motor actuator drive controller |
| CN107240532A (en) * | 2016-04-29 | 2017-10-10 | 上海良信电器股份有限公司 | Electric operating mechanism of circuit-breaker circuit |
| CN107240532B (en) * | 2016-04-29 | 2020-05-19 | 上海良信电器股份有限公司 | Circuit of electric operating mechanism of circuit breaker |
| CN107833784A (en) * | 2017-11-07 | 2018-03-23 | 盐城博鸣信息科技有限公司 | A kind of control mechanism of vacuum circuit breaker control circuit |
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Granted publication date: 20150513 Termination date: 20151124 |