CN205355812U - Looks control system is selected to 12kV permanent magnetism vacuum circuit breaker intelligence - Google Patents
Looks control system is selected to 12kV permanent magnetism vacuum circuit breaker intelligence Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E40/30—Reactive power compensation
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Abstract
The utility model provides a looks control system is selected to 12kV permanent magnetism vacuum circuit breaker intelligence comprises control panel and drive plate two parts. The control panel extracts out the zero crossing as selecting the reference time point of controlling mutually after gathering the current signal from the signal. Received the divide -shut brake instruction back of circuit breaker, the control panel obtains one section delay time through calculation earlier, and the coil of controlling the drive plate after the time delay again discharges with the branch closing operation who carries out the circuit breaker. Because the influence selects the factor of looks time accuracy nature mainly to include operating mechanism operate time, drive plate coil excitation time, refer to the seizure and the procedure delay time at zero point, wherein permanent magnet operating mechanism's deciliter operate time is invariable basically, and the drive plate coil excitation time also be the constatn value, consequently selects the accuracy nature of controlling mutually mainly to depend on the delay time of procedure. The equitable control delay time time, just can make the circuit breaker close a floodgate in the punishment of electric current zero crossing to effectively avoid branch switching in rush current and switching overvoltage transient, improve the reliability of circuit breaker work.
Description
Technical field
This utility model relates to electric and electronic technical field, is specifically related to a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection and controls system.
Background technology
Chopper is as the visual plant closed in power system with cut-off circuit, and the safe and stable operation for whole electrical network has important function.Wherein, vacuum circuit breaker is with the feature of its inside fine vacuum, high dielectric strength, have dielectric strength height, need not the frequent advantage such as maintenance, obtain in power system and apply extremely widely, especially typical capacitor to be carried out switching control realization reactive-load compensation.The various structures of vacuum circuit breaker, is developed into spring, hydraulic pressure and permanent magnet mechanism by initial manual type.Wherein permanent magnet mechanism occur in the structure that greatly simplify mechanism, improve the reliability of actuating, additionally its of dispersibility little movement time, and deciliter time tends to fixed value, convenient controls, and therefore obtains tremendous expansion.
Traditional vacuum circuit breaker lacks the effective control to current phase, very easily causes at the non-near zero-crossing point deciliter capacitor of electric current, thus there is comparatively serious surge current and switching overvoltage transient process.These transition effects very easily cause the misoperation of secondary side relay equipment, have a strong impact on power supply quality, and the stable operation of power system also causes very big threat, may result in electrical network paralysis, bring immeasurable serious consequence time serious.
Traditional method that divide-shut brake shoves that suppresses is to load reactor or switching-on resistance, and serious transition effect is divided into multiple more weak transient process, thus within inrush phenomenon is limited in certain amplitude.This method complicated operation, device is easily impaired because frequently switching；Over-voltage suppression transient process then adopts and installs resistance-capacitance absorption device additional, and its principle is through shnt capacitor to increase the shunt capacitance of protected equipment.It is extremely harsh that this device chooses requirement for the resistance of resistance and electric capacity, chooses and improper will produce harmonic wave, adds the fault rate of system on the contrary.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency for above-mentioned existence, a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection is provided to control system, energy Real-time Collection current phase, and can control chopper carry out at current zero-crossing point place capacitor switching operation, shoving and switching overvoltage transient process thus being prevented effectively from divide-shut brake, improving the reliability of chopper work.
This utility model solves its technical problem and be the technical scheme is that
One 12kV permanent magnetic vacuum breaker intelligent phase selection controls system, and system is mainly made up of panel and driving plate two parts, and panel and driving plate are mutually isolated.After panel collects current signal, from signal, extract the zero crossing reference time point as phase-controlled.After receiving the divide-shut brake instruction of chopper, panel first passes through calculating and obtains one section of delay time, controls the coil discharge driving plate again to carry out the breaking-closing operating of chopper, thus ensureing to realize the steady switching of capacitor at current zero-crossing point place after time delay.
Panel, is used for gathering current signal, extracts the zero crossing reference time point as phase-controlled from signal, after the divide-shut brake instruction receiving chopper, the computation delay time, controls to drive plate.
Drive plate, for making permanent magnet mechanism excitatory permanent magnet mechanism coil discharge, it is achieved the breaking-closing operating of chopper.
Described panel interconnects with driving plate；The voltage transformer summation current transformer of described panel connects electrical network respectively；The coil control circuit of described driving plate and chopper interconnection, the controller of described panel connects chopper.
Described panel includes controller, voltage transformer, current transformer, signal acquisition circuit, signal conditioning circuit, divide-shut brake instruction reading circuit and display circuit；Signal conditioning circuit, divide-shut brake instruction reading circuit and display circuit connect controller respectively；Described voltage transformer summation current transformer connects the respective input of signal acquisition circuit respectively, and the outfan of signal acquisition circuit connects the input of signal conditioning circuit.
Described voltage transformer summation current transformer gathers voltage signal and current signal respectively from electrical network, and wherein current signal converts same phase voltage signal to after signal acquisition circuit, extracts the reference zero of system after signal conditioning circuit；After divide-shut brake instruction reading circuit receives deciliter signal of chopper, driving plate is sent signal by controller, it is achieved deciliter operation of chopper；Display circuit is for showing electrical network parameter in real time, including size of current, chopper deciliter state.
Described driving plate is made up of charging capacitor, charging power source circuit, capacitance voltage testing circuit, coil control circuit and drive circuit；The input of described drive circuit and capacitance voltage testing circuit connecting coil control circuit respectively；Described capacitance voltage testing circuit and charging capacitor interconnection；Described charging power source circuit connects charging capacitor.
Described charging capacitor is as the driving power supply of permanent-magnet manipulating mechanism；Described charging power source circuit provides high-quality charge power supply for electric capacity, and whole driving plate is realized overvoltage protection；Described capacitance voltage testing circuit is by the real-time monitoring to charging capacitor voltage, it is ensured that charging capacitor both end voltage reaches coil discharge requirement, makes permanent magnet mechanism action message；Described coil control circuit is by the control to the sense of current circulated in coil, it is achieved the separating brake of permanent magnet mechanism and closing operation.
Described panel carries RT-Thread real time operating system, it is ensured that the accurate delay of system；Conservative control delay time, can make chopper at current zero-crossing point place divide-shut brake, shoving and switching overvoltage transient process thus being prevented effectively from divide-shut brake, improving the reliability of chopper work.
Described signal acquisition circuit first converts current signal to synchronous voltage signal by small resistor, described voltage signal is isolated by voltage transformer ZMPT107 after current-limiting resistance R1, the compensation of phase place is carried out, again through decoupling and the filtering of electric capacity C14 and electric capacity C16 Capacitor banks through electric capacity C15 and resistance R2；By adjusting the resistance of sampling resistor R2, make input voltage within the voltage range that system can be born.
Described signal conditioning circuit includes voltage lifting, filtering, impedance isolation and extracts four functions of zero crossing.
Described divide-shut brake instruction reading circuit is made up of photoelectrical coupler 4N35；After Two-port netwerk junction block Header2 end, divide-shut brake instruction output corresponding signal, this signal is isolated by photoelectrical coupler, and signal is delivered to the GPIO mouth of panel, it is achieved the read functions of instruction.
Described coil control circuit is H bridge circuit, using electric capacity as the action energy of coil；Q01, Q02, Q03, Q04 are insulated gate bipolar transistor IGBT, control Q01, Q04 conducting when sub-switching operation, and Q02, Q03 turn off, and when making electric capacity to circuit-breaker switching on-off coil discharge, the sense of current is for just, completing sub-switching operation；Controlling Q02, Q03 conducting during closing operation, Q01, Q04 turn off, and when making coil discharge, the sense of current is negative, completes closing operation；Dead Time is set to the switching tube of upper and lower bridge arm, it is prevented that upper and lower bridge arm conducting causes short circuit during practical operation.
Described drive circuit is made up of driving chip TC4427；Two-port netwerk junction block Header2 place is isolated by photoelectrical coupler after receiving divide-shut brake signal, inputs a signal into driving chip TC4427；Driving chip decides whether to export big electric current according to the value of this signal, to drive insulated gate bipolar transistor IGBT；TC4427 maximum output current is 1.5A, it is ensured that the reliable control of insulated gate bipolar transistor IGBT.
Operation principle of the present utility model is, the key technology of phase-controlled system is in that the accurate of phase-controlled time.Affect the factor of phase selection Time precision mainly to include breaker operation mechanism movement time, drive board coil excitation time, the seizure of reference zero and Program time delay time.The substantially constant deciliter movement time of permanent-magnet manipulating mechanism, after driving plate to design, its coil magnetization time is also steady state value, the seizure accuracy of reference zero is determined by follow-up hardware designs and program computation, and therefore the accuracy of phase-controlled depends primarily on the time delay of program.Conservative control delay time so that chopper realizes breaking-closing operating at current zero-crossing point place, so realizes accurate phase-controlled.
The beneficial effects of the utility model are in that: system fully grasps the real-time phase information of current signal, after receiving circuit-breaker switching on-off signal, ensure to realize the accurate breaking-closing operating of chopper at current zero-crossing point place, effectively prevent the generation of surge current and switching overvoltage, improve reliability and the safety of power supply.
Accompanying drawing explanation
Fig. 1 is this utility model embodiment phase-controlled sequential chart；
Fig. 2 is this utility model example structure block diagram；
Fig. 3 is this utility model embodiment panel signal acquisition circuit figure；
Fig. 4 is this utility model embodiment panel signal conditioning circuit figure；
Fig. 5 is this utility model embodiment panel divide-shut brake instruction reading circuit figure；
Fig. 6 is this utility model embodiment panel display circuit figure；
Fig. 7 is that this utility model embodiment drives plate charging power source circuit figure；
Fig. 8 is that this utility model embodiment drives plate capacitance voltage testing circuit figure；
Fig. 9 is that this utility model embodiment drives board coil control circuit figure；
Figure 10 is that this utility model embodiment drives plate IGBT drive circuit figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As it is shown in figure 1,12kV permanent magnetic vacuum breaker intelligent phase selection controls the controller of system at t1The combined floodgate order that reception system or user send, detects that system voltage is with first zero crossing moment Tzero(later or after the zero crossing of several half-waves), make chopper close a floodgate at the phase time Tob point place specified.Chopper mechanical closing time inherently is Tcls, is carved with one section of time delay Td1 when therefore sending reclosing command Tc from zero crossing Tzero to controller.Combined floodgate flow process is: controller detects a zero crossing as reference time point after receiving order of closing a floodgate, after zero crossing, after the time delay of Td1, controller sends reclosing command, after intrinsic breaker closing time Tcls, chopper completes closing operation at the phase angle Tob place specified.
By panel and plate two parts are driven to form as in figure 2 it is shown, 12kV permanent magnetic vacuum breaker intelligent phase selection controls system.The voltage transformer pt summation current transformer CT of panel collects voltage signal and current signal respectively from electrical network, and wherein current signal converts same phase voltage signal to after signal acquisition circuit, extracts the reference zero of system after signal conditioning circuit.Display circuit shows deciliter state of power grid state information and chopper in real time.After divide-shut brake signal read circuits receives the divide-shut brake signal of chopper, controller sends instruction, makes driving plate carry out the discharge operation of coil.Plate is driven to adopt charging capacitor as the driving power supply of permanent magnet mechanism circuit-breaker, power circuit is responsible for providing the charge power supply of electric capacity, the real-time monitoring voltage state of capacitance voltage testing circuit, it is ensured that electric capacity both end voltage reaches coil discharge requirement, makes permanent magnet mechanism action message.After receiving the divide-shut brake signal of panel, coil control circuit, with electric capacity for action power, makes chopper correct operation by drive circuit.After breaker actuation, signal is returned to panel, complete once complete action.
As shown in Figure 3, intelligent phase selection controls system control panel signal acquisition circuit and first converts current signal to synchronous voltage signal by small resistor, this voltage signal is isolated by voltage transformer ZMPT107 after current-limiting resistance R1, the compensation of phase place is carried out, again through decoupling and the filtering of C14 and C16 Capacitor banks through C15 and R2.By adjusting the resistance of sampling resistor R2, make input voltage within the voltage range that system can be born.
As shown in Figure 4, intelligent phase selection control system control panel signal conditioning circuit includes voltage lifting, filtering, impedance isolation and extracts four functions of zero crossing.Voltage lifting part passes through two resistance R28 and R35 dividing potential drop, and be added to AC-input voltage by DC quantity, makes the signal after superposition within 0 ~ 3.3V, meets voltage range during controller A/D conversion.Being formed RC filter circuit by resistance and electric capacity, filtered signal carries out impedance isolation by voltage follower.At TP3 place, input voltage enters the in-phase input end of comparator LTC6702ITS8, and DAU is the direct current component value of this voltage.Carry out voltage ratio relatively by comparator, produce square wave at outfan.STM32 catches this square wave can collect the zero crossing of system voltage.
Mainly it is made up of photoelectrical coupler 4N35 as it is shown in figure 5, intelligent phase selection controls system control panel divide-shut brake instruction reading circuit.After Two-port netwerk junction block Header2 end, divide-shut brake instruction output corresponding signal, this signal is isolated by photoelectrical coupler, and signal is delivered to the GPIO mouth of panel, it is achieved the read functions of instruction.
As shown in Figure 6, intelligent phase selection controls system control panel display circuit and adopts SDW8060-080-1N20W series industry control screen, supports VGUS configuration development scheme, can design the configuration file generating human-machine interactive information.Screen size is 8 inches, adopts serial mode and controller to carry out communication, and the mode of connection is simple.
As it is shown in fig. 7, intelligent phase selection controls the external 90 ~ 265V alternating current power supply of system drive plate charging power source circuit, send into D15XB60 rectifier bridge module after filtering after circuit and carry out rectification.Store electric energy by inductance L9 and be overlapped realizing the boosting of signal with the voltage signal being input into, thus+400V the DC source that output capacitance charging is required.Period is opened, due to the existence of D13, it is possible to make circuit continue the charging of subsequent capacitance load, it is ensured that the seriality of charging at Q1 and Q2.
As shown in Figure 8, intelligent phase selection controls system capacitance voltage detecting circuit and will carry out the amplification of signal after capacitance partial pressure through amplifier, through precision photoelectric coupler HCNR201, voltage signal is converted to current signal, the current signal of output is converted to voltage signal again by amplifier, ensure the magnitude of voltage becoming controller to bear convert of capacitor to voltage, it is prevented that control system is interfered and destroys by the high voltage at electric capacity two ends.Controller passes through AD conversion, monitors the magnitude of voltage at electric capacity two ends in real time, it is ensured that electric capacity both end voltage reaches coil discharge requirement, makes permanent magnet mechanism action message.
As it is shown in figure 9, it is H bridge circuit that intelligent phase selection controls system drive board coil control circuit, using electric capacity as the action energy of coil.Q01, Q02, Q03, Q04 are insulated gate bipolar transistor IGBT, control Q01, Q04 conducting when sub-switching operation, and Q02, Q03 turn off, and when making electric capacity to circuit-breaker switching on-off coil discharge, the sense of current is for just, completing sub-switching operation.Controlling Q02, Q03 conducting during closing operation, Q01, Q04 turn off, and when making coil discharge, the sense of current is negative, completes closing operation.Dead Time is set to the switching tube of upper and lower bridge arm, it is prevented that upper and lower bridge arm conducting causes short circuit during practical operation.
As shown in Figure 10, intelligent phase selection control system drive plate IGBT drive circuit is mainly made up of driving chip TC4427.Two-port netwerk junction block Header2 place is isolated by photoelectrical coupler after receiving divide-shut brake signal, inputs a signal into driving chip TC4427.Driving chip decides whether to export big electric current according to the value of this signal, to drive IGBT.TC4427 maximum output current is 1.5A, it is ensured that the reliable control of IGBT.
Claims (8)
1. a 12kV permanent magnetic vacuum breaker intelligent phase selection controls system, it is characterised in that including:
Panel, is used for gathering current signal, extracts the zero crossing reference time point as phase-controlled from signal, after the divide-shut brake instruction receiving chopper, the computation delay time, controls to drive plate；
Drive plate, for making permanent magnet mechanism excitatory permanent magnet mechanism coil discharge, it is achieved the breaking-closing operating of chopper；
Described panel interconnects with driving plate；The voltage transformer summation current transformer of described panel connects electrical network respectively；The coil control circuit of described driving plate and chopper interconnection, the controller of described panel connects chopper.
2. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 1 controls system, it is characterized in that, described panel includes controller, voltage transformer, current transformer, signal acquisition circuit, signal conditioning circuit, divide-shut brake instruction reading circuit and display circuit；Signal conditioning circuit, divide-shut brake instruction reading circuit and display circuit connect controller respectively；Described voltage transformer summation current transformer connects the respective input of signal acquisition circuit respectively, and the outfan of signal acquisition circuit connects the input of signal conditioning circuit；
Described voltage transformer summation current transformer gathers voltage signal and current signal respectively from electrical network, and wherein current signal converts same phase voltage signal to after signal acquisition circuit, extracts the reference zero of system after signal conditioning circuit；After divide-shut brake instruction reading circuit receives deciliter signal of chopper, driving plate is sent signal by controller, it is achieved deciliter operation of chopper；Display circuit is for showing electrical network parameter in real time, including size of current, chopper deciliter state.
3. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 1 controls system, it is characterised in that described driving plate is made up of charging capacitor, charging power source circuit, capacitance voltage testing circuit, coil control circuit and drive circuit；The input of described drive circuit and capacitance voltage testing circuit connecting coil control circuit respectively；Described capacitance voltage testing circuit and charging capacitor interconnection；Described charging power source circuit connects charging capacitor；
Described charging capacitor is as the driving power supply of permanent-magnet manipulating mechanism；Described charging power source circuit provides high-quality charge power supply for electric capacity, and whole driving plate is realized overvoltage protection；Described capacitance voltage testing circuit is by the real-time monitoring to charging capacitor voltage, it is ensured that charging capacitor both end voltage reaches coil discharge requirement, makes permanent magnet mechanism action message；Described coil control circuit is by the control to the sense of current circulated in coil, it is achieved the separating brake of permanent magnet mechanism and closing operation.
4. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 2 controls system, it is characterised in that described panel carries RT-Thread real time operating system.
5. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 2 controls system, it is characterized in that, described signal acquisition circuit first converts current signal to synchronous voltage signal by small resistor, described voltage signal is isolated by voltage transformer ZMPT107 after current-limiting resistance R1, the compensation of phase place is carried out, again through decoupling and the filtering of electric capacity C14 and electric capacity C16 Capacitor banks through electric capacity C15 and resistance R2；By adjusting the resistance of sampling resistor R2, make input voltage within the voltage range that system can be born.
6. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 2 controls system, it is characterised in that described divide-shut brake instruction reading circuit is made up of photoelectrical coupler 4N35；After Two-port netwerk junction block Header2 end, divide-shut brake instruction output corresponding signal, this signal is isolated by photoelectrical coupler, and signal is delivered to the GPIO mouth of panel.
7. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 3 controls system, it is characterised in that described coil control circuit is H bridge circuit, using electric capacity as the action energy of coil；Q01, Q02, Q03, Q04 are insulated gate bipolar transistor IGBT, control Q01, Q04 conducting when sub-switching operation, and Q02, Q03 turn off, and when making electric capacity to circuit-breaker switching on-off coil discharge, the sense of current is for just, completing sub-switching operation；Controlling Q02, Q03 conducting during closing operation, Q01, Q04 turn off, and when making coil discharge, the sense of current is negative, completes closing operation；Dead Time is set to the switching tube of upper and lower bridge arm, it is prevented that upper and lower bridge arm conducting causes short circuit during practical operation.
8. a kind of 12kV permanent magnetic vacuum breaker intelligent phase selection according to claim 3 controls system, it is characterised in that described drive circuit is made up of driving chip TC4427；Two-port netwerk junction block Header2 place is isolated by photoelectrical coupler after receiving divide-shut brake signal, inputs a signal into driving chip TC4427；Driving chip decides whether to export big electric current according to the value of this signal, to drive insulated gate bipolar transistor IGBT；TC4427 maximum output current is 1.5A, it is ensured that the reliable control of insulated gate bipolar transistor IGBT.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520791047.4U CN205355812U (en) | 2015-10-14 | 2015-10-14 | Looks control system is selected to 12kV permanent magnetism vacuum circuit breaker intelligence |
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| CN201520791047.4U CN205355812U (en) | 2015-10-14 | 2015-10-14 | Looks control system is selected to 12kV permanent magnetism vacuum circuit breaker intelligence |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966927A (en) * | 2017-11-20 | 2018-04-27 | 中电普瑞电力工程有限公司 | A kind of contactless circuit closing device for being precisely controlled phase |
| CN111900007A (en) * | 2020-07-29 | 2020-11-06 | 浙江方圆电气设备检测有限公司 | Method for accurately controlling phase selection closing angle |
| CN114496675A (en) * | 2021-12-21 | 2022-05-13 | 平高集团有限公司 | High-voltage circuit breaker and closing control method thereof |
| WO2023142464A1 (en) * | 2022-01-30 | 2023-08-03 | 福州大学 | Integrated flux linkage closed-loop control system of monostable permanent magnet contactor |
-
2015
- 2015-10-14 CN CN201520791047.4U patent/CN205355812U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966927A (en) * | 2017-11-20 | 2018-04-27 | 中电普瑞电力工程有限公司 | A kind of contactless circuit closing device for being precisely controlled phase |
| CN111900007A (en) * | 2020-07-29 | 2020-11-06 | 浙江方圆电气设备检测有限公司 | Method for accurately controlling phase selection closing angle |
| CN114496675A (en) * | 2021-12-21 | 2022-05-13 | 平高集团有限公司 | High-voltage circuit breaker and closing control method thereof |
| CN114496675B (en) * | 2021-12-21 | 2024-05-14 | 平高集团有限公司 | High-voltage circuit breaker and closing control method thereof |
| WO2023142464A1 (en) * | 2022-01-30 | 2023-08-03 | 福州大学 | Integrated flux linkage closed-loop control system of monostable permanent magnet contactor |
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