CN104218666B - 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment - Google Patents
10kV vacuum circuit breaker standby closing coil automatic throw-in equipment Download PDFInfo
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Abstract
The invention discloses a kind of 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment, automatically engage loop, former closing circuit including spare coil, control power supply and measure and control device, controlling power supply to include controlling power supply negative terminal and controlling power positive end, it is the control relay A that connects between former closing coil with control power supply negative terminal on the basis of former closing circuit that spare coil automatically engages loop；And a series loop in parallel between normally closed auxiliary contact QF with control power supply negative terminal；This series loop includes standby closing coil and controls relay B, does not change former closing circuit.The present invention is standby closing coil in parallel on the basis of former closing coil, can realize the automatic switching function of standby closing coil after former Burnout of Closing Coil, improves power supply reliability, improves closing coil service life, improves closing coil working environment.
Description
Technical field
The present invention relates to a kind of Measurement and Control System for protective breaker operating mechanism, the control device that in a kind of 10kV vacuum circuit breaker operating mechanism, standby closing coil automatically engages.
Background technology
Along with the development of economic society, also constantly raising the need for electricity amount of power system, the requirement to power system security reliability service is more and more higher.In power system, 10kV vacuum switch has extremely wide application, therefore plays vital effect in the reliability service electrical network of 10kV vacuum switch.
10kV vacuum circuit breaker is made up of breaker body, operating mechanism, power supply three part.The reliability of 10kV vacuum circuit breaker body has reached at a relatively high level, and its mean free error time is up to many decades.But in actual motion, the reliability of 10kV vacuum circuit breaker but and pessimistic, the reliability level reached well below its body.Statistics shows: having 70%～more than 90% in 10kV vacuum circuit breaker fault is the fault of operating mechanism.
Investigation finds, in operating mechanism fault, the overwhelming majority is Burnout of Closing Coil, and the unplanned power failure that this type of fault causes directly affects power supply reliability, and increases maintenance workload.
Closing coil is by a hollow multiturn coil, the magnetic field produced after coil is charged can make the connecting rod action of centre, thus open the pin of locking energy-stored spring, energy-stored spring releases energy breaker closing, now the normally closed auxiliary contact in wire loop disconnects and makes coil losing electricity, the back-moving spring on coil losing electricity back link that connecting rod can be made to reset.
If but the energy that connecting rod obtains from coil not, mechanism's bite or coil insulation damage etc. the most all can cause coil to be energized for a long time working in short-circuit condition and then burn coil.Meanwhile, still suffer from actually used because maloperation, in the short time, repeatedly deciliter etc. artificial origin damages coil.
Summary of the invention
It is an object of the invention to provide one and can improve closing coil service life, improve closing coil working environment, it is achieved 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment.
For achieving the above object, the present invention provides following technical scheme:
10kV vacuum circuit breaker standby closing coil automatic throw-in equipment, automatically engage loop, former closing circuit including spare coil, control power supply and measure and control device, controlling power supply to include controlling power supply negative terminal and controlling power positive end, it is the control relay A that connects between former closing coil with control power supply negative terminal on the basis of former closing circuit that spare coil automatically engages loop；And a series loop in parallel between normally closed auxiliary contact QF with control power supply negative terminal；This series loop includes standby closing coil and controls relay B, does not change former closing circuit；
Measure and control device includes Hall element, conditioning module, AD conversion module, dsp chip；Hall element realizes being acquired former closing coil and the voltage at standby closing coil two ends, current signal be converted to secondary current value according to certain no-load voltage ratio；Conditioning module is again converted to magnitude of voltage to secondary current value and processing and amplifying becomes codomain value in AD conversion module input range, the input analogue value is converted to digital signal by AD conversion module, and the digital signal that AD conversion module exports is acquired and computational analysis by dsp chip；Output control relay A, the control signal of control relay B, finally realize spare coil and automatically engage function.
As the further scheme of the present invention: controlling relay A, control relay B selection SSR solid-state relay, model is GJ-5FA-L.
As the further scheme of the present invention: Hall element includes HNV025A Hall voltage sensor and HNC03SY Hall current sensor.
As the further scheme of the present invention: AD conversion module uses AD7656 conversion chip.
As the further scheme of the present invention: dsp chip uses TMS320F2812 chip.
As the further scheme of the present invention: light-coupled isolation module uses HCPL4504 photoelectrical coupler.
Compared with prior art, the invention has the beneficial effects as follows:
(1) present invention uses TMS320F2812 chip as core processor, realize powerful generating date ability, use more accurate A/D sampling A/D chip AD7656 conversion chip faster, curent change situation master when closing coil running voltage and combined floodgate can be carried out Real-time Collection and analyzing and processing.
(2) present invention uses the Hall element that the linearity is high, conversion speed is fast, and secondary is output as current signal and improves the interference free performance of device.
(3) present invention standby closing coil in parallel on the basis of former closing coil, can realize the automatic switching function of standby closing coil after former Burnout of Closing Coil, improves power supply reliability.
(4) former combined floodgate electrical apparatus release is transformed by the present invention, and the length increasing combined floodgate electrical apparatus release can strike combined floodgate dropout trigger board prolongation with the standby combined floodgate lance ensureing standby closing coil, effectively meets the function that standby closing coil completes to close a floodgate.
(5) control algolithm uses voltage.The structure that magnitude of voltage and current value jointly control, effectively meets the needs that under former closing coil malfunction, standby closing coil automatically engages, and high-speed data acquisition frequency is that data analyze and process further and provide possibility.
Accompanying drawing explanation
Fig. 1 is 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment block diagram；
Fig. 2 is measure and control device schematic diagram；
Fig. 3 is that spare coil automatically engages circuit wiring diagram；
Fig. 4 is novel combined floodgate trigger perspective view；
Fig. 5 is spare coil scheme of installation；
Fig. 6 is former closing coil action schematic diagram；
Fig. 7 is standby closing coil action schematic diagram；
Fig. 8 is DSP Measuring and controlling program flow chart of the present invention；
Fig. 9 is the circuit diagram of former closing circuit；
In figure: 1-spare coil automatically engages loop, 2-normally closed auxiliary contact QF, the former closing circuit of 3-, 4-controls power supply and measure and control device, 5-controls power positive end, 6-controls power supply negative terminal, the standby closing coil of 7-, 8-controls relay A, 9-controls relay B, 10-Hall element, 11-conditioning module, 12-AD modular converter, 13-DSP chip, 14-light-coupled isolation module, 21-combined floodgate dropout trigger board, 22-asessory shaft, 23-combined floodgate dropout trigger board prolongation, 24-fastens screw, 25-novel combined floodgate electrical apparatus release, 26-fixing point, the former closing coil of 27-, 28-former closing coil power line, 29-former combined floodgate lance, 30-standby combined floodgate lance.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Refer to Fig. 1 and Fig. 9, in the embodiment of the present invention, 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment, automatically engage loop 1, former closing circuit 3 including spare coil, control power supply and measure and control device 4, controlling power supply to include controlling power supply negative terminal 6 and controlling power positive end 5, it is the control relay A8 that connects between former closing coil 27 with control power supply negative terminal 6 on the basis of former closing circuit 3 that spare coil automatically engages loop 1；And a series loop in parallel between normally closed auxiliary contact QF2 with control power supply negative terminal 6；This series loop includes standby closing coil 7 and controls relay B9, does not change former closing circuit 3.
Former closing circuit 3 includes anti-trip relay, closing by hand relay and combined floodgate guard relay, when breaker closing, start the normally opened holding contact self-sustaining of combined floodgate guard relay HBJ, combined floodgate guard relay HBJ, make closing circuit constantly on, until chopper closes.Closing circuit is disconnected with the normally closed auxiliary contact QF2 that chopper current interruption ability is stronger after breaker closing, normally opened contact SHJ or ZHJ avoiding the poor closing relay of current interruption ability returns in advance and arcing burns out, and can guarantee that normal combined floodgate and the chopper that reliably closes during reclosing action.When sub-gate circuit in an ON state time, anti-trip relay TBJV1 opens contact, makes closing circuit be constantly in off-state, prevents the jump of chopper.
Measure and control device 4 includes Hall element 10, conditioning module 11, AD conversion module 12, dsp chip 13.Hall element 10 realizes being acquired former closing coil 27 and the voltage at standby closing coil 7 two ends, current signal be converted to secondary current value according to certain no-load voltage ratio.Conditioning module 11 is again converted to magnitude of voltage to secondary current value and processing and amplifying becomes codomain value in AD conversion module 12 input range, the input analogue value is converted to digital signal by AD conversion module 12, and the digital signal that AD conversion module 12 exports is acquired and computational analysis by dsp chip 13；Output control relay A8, the control signal of control relay B9, finally realize spare coil 7 and automatically engage function.
Refer to Fig. 2-Fig. 3, Hall element voltage sample part 101 selects 2 HNV025A Hall voltage sensors to gather the former i.e. HQ1 of closing coil 27 respectively, the voltage at standby closing coil 7 i.e. HQ2 two ends, Hall voltage sensor is applicable to measure voltage 10～500V, secondary output-current rating is 25mA, resistance R5 in the electric current that sampling obtains conditioned module 11 respectively, resistance R7 dividing potential drop, the amplifying circuit that this voltage is extremely made up of AD620 amplifier chip through the input of RC filter circuit, voltage-mode analog values is converted to the analogue signal between-5V～+5V be multiplied by the no-load voltage ratio of Hall voltage sensor and i.e. can get the magnitude of voltage on former limit, this signal exports AD conversion module 12.
Hall element current sample part 102 selects 2 HNC03SY Hall current sensors to gather the electric current flowing through HQ1, HQ2 respectively, to the amplifying circuit being made up of AD620 amplifier chip, the analogue signal that voltage-mode analog values is converted between-5V～+5V is input to AD conversion module 12 through the input of RC filter circuit after sample the resistance R4 in the conditioned circuit module of the analogue value 11 obtained, resistance R2 dividing potential drop.
AD conversion module 12 uses the AD7656 conversion chip of AD company of the U.S. as A/D conversion chip, this chip is a kind of 16 analog-digital converters at a high speed, and its sampling rate is 250kS/s, has the feature of extremely low power dissipation, input range is-5V～+5V, can meet the needs of this device.Wherein AD7656 conversion chip converts analog signals into digital signal output in dsp chip 13；
Dsp chip 13 in measure and control device 4 is the key surveyed and realize observing and controlling function as core processor.Select TMS320F2812 as dsp chip 13, have a characteristic that (1) high primary frequency, the i.e. dominant frequency of 150MHz；(2) low-power consumption, 1.8V and 3.3V powers；(3) the internal SARAM of 128K internal FLASH, 18K, can extend out 1M memorizer, and memorizer is unified addressing, and its addressing space reaches 4M；(4) interrupt resources is enriched, and can support that 45 peripheral hardware levels are interrupted and 3 external interrupt；Extracting interrupt vector and saving scene only needs 9 clock cycle, response is rapidly.
Dsp chip 13 have cured the program of whole system control part, its voltage V1, voltage V2 and electric current 11 to collecting, electric current I2 are analyzed calculating, and according to result of calculation, output I/O port GPIOA0, GPIOA1 put 1 or reset, i.e. send to close or disconnects and control relay A8, the order of control relay B9.
The switch command signal sent due to dsp chip 13 is insufficient for controlling relay A8, controlling relay B9 action, need to increase light-coupled isolation module 14 to strengthen the driving force of switch command signal so that controlling relay A8, controlling relay B9 action, and realize the isolation of forceful electric power and light current, strengthen the interference free performance of system.Light-coupled isolation module 14 is mainly made up of two pieces of HCPL4504 photoelectrical couplers, and according to dsp chip 13 data, when input Up_1 is high level+5V, its outfan Uin voltage is+15V；During input Up_1 low level 0V, its outfan Uin voltage is OV；The output of HCPL4504 photoelectrical coupler is applied directly to control relay A8, controls the input of relay B9 thus realizes the order closed or disconnect.
Controlling relay A8, control relay B9 selection SSR solid-state relay, model is GJ-5FA-L, uses the control mode of direct current control direct current, its load voltage is 220VDC, control voltage is 3-32VDC, and load current is 30A, meets the requirement to arc extinguishing ability when auxiliary contact cut-off.
Two voltage sensors gather the voltage at HQ1, HQ2 two ends respectively, and the voltage collected receives voltage sensor lH1, H2 and L1 of measure and control device 4, L2 terminal；Two current sensors gather the electric current flowing through HQ1, HQ2 respectively, and the electric current collected receives H7, H8 and L7 of measure and control device 4, L8 terminal.Control relay A8 input in HQ1 loop receives H4, H6 terminal, and controlling relay A8 is that normally closed type controls relay, and the control relay B9 input in HQ2 loop receives L4, L6 terminal；S1, S2 are power positive end and the negative terminal of measure and control device 4, and controlling relay B9 is control relay open in usual.
Referring to Fig. 4-Fig. 7, traditional combined floodgate electrical apparatus release is by closing a floodgate dropout trigger board 21 and asessory shaft 22 is constituted.Former closing coil 27 electric after make former combined floodgate lance 29 clash into combined floodgate dropout trigger board 21 under the action of a magnetic field, drive asessory shaft 22 rotates, thus realizes making process.So that the standby combined floodgate lance 30 of standby closing coil 7 can play the effect of combined floodgate, adding a combined floodgate dropout trigger board prolongation 23 on the basis of original combined floodgate dropout trigger board 21, it links together through fastening screw 24 with combined floodgate dropout trigger board 21.Therefore, novel combined floodgate electrical apparatus release 25 is made up of combined floodgate dropout trigger board 21, asessory shaft 22, combined floodgate dropout trigger board prolongation 23 and fastening screw 24.
Time in former closing coil 27 by electric current, producing magnetic flux in electric magnet, former combined floodgate lance 29, by electromagnetic force adhesive, clashes into novel combined floodgate electrical apparatus release 25, drives asessory shaft 22 to rotate, completes making process.Not flowing through electric current in the most standby closing coil 7, the most standby combined floodgate lance 30 is failure to actuate.
Time in standby closing coil 7 by electric current, producing magnetic flux in electric magnet, standby combined floodgate lance 30, by electromagnetic force adhesive, clashes into the connecting lever prolongation of novel combined floodgate electrical apparatus release 25, drives asessory shaft 22 to rotate, completes making process.Not flowing through electric current in the most former closing coil 7, the most former combined floodgate lance 30 is failure to actuate.
On dsp chip 13 according to content design as above control algolithm of based on TMS320F2812 chip, flow process is as follows:
First, system completes the initialization procedure needed for TMS320F2812 chip starts, and step includes:
1) system initialization: system clock is arranged, forbids and removes all CPU interrupting, initialization vector table to default conditions, initialization vector table.
2) GPIO module initialization, initializing pin GPIOA0/PWM1, GPIOA1/PWM2 is general I/O mouth, and direction is output.
3) system enables the underflow interruption of intervalometer, in order to start AD sampling and to calculate.
4) redistribute interrupt vector, enable the interruption 6 (T1UFINT) of PIE group 2, enable CPUINT2 (T1UFINT).
5) enable global interrupt and limit priority debugs task manager function in real time.
6) enter circular wait state, wait to be interrupted.
7) interrupt occurring, enter interruption subroutine and process: perform AD sampling module, voltage detection module, current detection module, closing circuit breakdown judge module successively.After having performed above-mentioned module successively, refresh interrupt vector table, and return in mastery routine, reenter circular wait state, wait the generation next time interrupted.
7.1) voltage detection module: the dsp chip 13 V1 to collecting compares with HQ1 both end voltage U during normal work, and obtain its difference E=U-V, the value of IF expression E/U × 100% is then thought between-5%～+5% has combined floodgate order to send, and enters current detection module；Otherwise, interrupt routine is jumped out.
7.2) current detection module: judge the current value I1 that sampling obtains, if I1 is less than the 10% of coil rating electric current, then it is assumed that HQ1 fault, all puts 1 by I/O port GPIOA0, GPIOA1, disconnects control relay A8 and close control relay B9, HQ2 put into.
7.3) closing circuit breakdown judge module: arranging index initial value is 0, if the value of I1 is between-10%～+10% of coil rated current, then index+1.If the value of index is more than 512, then it is assumed that closing coil loop exists exception or fault, it is impossible to disconnect voluntarily.Cause burning for preventing coil to be energized for a long time, I/O port GPIOA0 is put 1, disconnect and control relay A8；Similarly, if the value of 12 is between-10%～+10% of coil rated current, I/O port GPIOA1 is reset, disconnect and control relay B9.
8) DSP program constantly enters in interrupt routine under the effect of intervalometer and processes, and finally ensures that closing coil loop is in the safe work state of control.
Compared with prior art, present invention have the advantage that
(1) present invention uses TMS320F2812 chip as core processor, realize powerful generating date ability, use more accurate A/D sampling A/D chip AD7656 conversion chip faster, curent change situation master when closing coil running voltage and combined floodgate can be carried out Real-time Collection and analyzing and processing.
(2) present invention uses the Hall element that the linearity is high, conversion speed is fast, and secondary is output as current signal and improves the interference free performance of device.
(3) present invention standby closing coil 7 in parallel on the basis of former closing coil 27, can realize the automatic switching function of standby closing coil 7 after former closing coil 27 burns, and improves power supply reliability.
(4) former combined floodgate electrical apparatus release is transformed by the present invention, the length increasing combined floodgate electrical apparatus release can strike combined floodgate dropout trigger board prolongation 23 with the standby combined floodgate lance 30 ensureing standby closing coil 7, effectively meets the function that standby closing coil 7 completes to close a floodgate.
(5) control algolithm uses voltage.The structure that magnitude of voltage and current value jointly control, effectively meets the needs that under former closing coil 27 malfunction, standby closing coil 7 automatically engages, and high-speed data acquisition frequency is that data analyze and process further and provide possibility.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in the present invention.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (5)
1.10kV vacuum circuit breaker standby closing coil automatic throw-in equipment, it is characterized in that, automatically engage loop (1), former closing circuit (3) including spare coil, control power supply and measure and control device (4), controlling power supply to include controlling power supply negative terminal (6) and controlling power positive end (5), it is the control relay A(8 that connects between former closing coil (27) with control power supply negative terminal (6) on the basis of former closing circuit (3) that spare coil automatically engages loop (1))；Former closing circuit (3) and spare coil automatically engage and are provided with normally closed auxiliary contact QF(2 between loop (1)), at normally closed auxiliary contact QF(2) with control a series loop in parallel between power supply negative terminal (6)；This series loop includes standby closing coil (7) and controls relay B(9), do not change former closing circuit (3)；
Measure and control device (4) includes Hall element (10), conditioning module (11), AD conversion module (12), dsp chip (13)；Hall element (10) realizes being acquired former closing coil (27) and the voltage at standby closing coil (7) two ends, current signal be converted to secondary current value according to certain no-load voltage ratio；Conditioning module (11) is again converted to magnitude of voltage to secondary current value and processing and amplifying becomes codomain value in AD conversion module (12) input range, the input analogue value is converted to digital signal by AD conversion module (12), and the digital signal that AD conversion module (12) exports is acquired and computational analysis by dsp chip (13)；Output control relay A(8), control relay B(9) control signal, finally realize standby closing coil (7) and automatically engage function.
10kV vacuum circuit breaker the most according to claim 1 standby closing coil automatic throw-in equipment, it is characterised in that described control relay A(8), control relay B(9) select SSR solid-state relay, model is GJ-5FA-L.
10kV vacuum circuit breaker the most according to claim 1 standby closing coil automatic throw-in equipment, it is characterised in that described Hall element (10) includes HNV025A Hall voltage sensor and HNC03SY Hall current sensor.
10kV vacuum circuit breaker the most according to claim 1 standby closing coil automatic throw-in equipment, it is characterised in that described AD conversion module (12) uses AD7656 conversion chip.
10kV vacuum circuit breaker the most according to claim 1 standby closing coil automatic throw-in equipment, it is characterised in that described dsp chip (13) uses TMS320F2812 chip.
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| CN201410454281.8A CN104218666B (en) | 2014-09-01 | 2014-09-01 | 10kV vacuum circuit breaker standby closing coil automatic throw-in equipment |
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| CN104218666B true CN104218666B (en) | 2016-08-03 |
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| CN106340851B (en) * | 2016-09-14 | 2019-04-19 | 国网福建省电力有限公司 | A kind of reclosure loop reform connecing small power station's route suitable for T |
| CN110752122B (en) * | 2019-10-31 | 2021-11-19 | 南京亚派科技股份有限公司 | Circuit breaker fault tripping indicating mechanism |
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| CN101261192A (en) * | 2008-04-24 | 2008-09-10 | 南京因泰莱配电自动化设备有限公司 | 24KV high-voltage vacuum breaker mechanical features on-line monitoring method and monitoring device |
| CN201335878Y (en) * | 2008-12-23 | 2009-10-28 | 上海德力西集团有限公司 | Testing device for mechanical characteristics of vacuum circuit breaker based on DSP in medium voltage power network |
| CN102842956A (en) * | 2012-09-28 | 2012-12-26 | 山东电力集团公司枣庄供电公司 | Loop security automatic controlling system capable of resisting 30-degree angle error |
| CN202978240U (en) * | 2012-09-26 | 2013-06-05 | 崔勇 | Breaker closing circuit protecting device and corresponding breaker closing circuit |
| CN204190481U (en) * | 2014-09-01 | 2015-03-04 | 国家电网公司 | A kind of 10kV vacuum circuit-breaker closing coil automatic throw-in equipment for subsequent use |
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2014
- 2014-09-01 CN CN201410454281.8A patent/CN104218666B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261192A (en) * | 2008-04-24 | 2008-09-10 | 南京因泰莱配电自动化设备有限公司 | 24KV high-voltage vacuum breaker mechanical features on-line monitoring method and monitoring device |
| CN201335878Y (en) * | 2008-12-23 | 2009-10-28 | 上海德力西集团有限公司 | Testing device for mechanical characteristics of vacuum circuit breaker based on DSP in medium voltage power network |
| CN202978240U (en) * | 2012-09-26 | 2013-06-05 | 崔勇 | Breaker closing circuit protecting device and corresponding breaker closing circuit |
| CN102842956A (en) * | 2012-09-28 | 2012-12-26 | 山东电力集团公司枣庄供电公司 | Loop security automatic controlling system capable of resisting 30-degree angle error |
| CN204190481U (en) * | 2014-09-01 | 2015-03-04 | 国家电网公司 | A kind of 10kV vacuum circuit-breaker closing coil automatic throw-in equipment for subsequent use |
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