CN105759199A - Production and approximation control method for instantaneous calibration current of low voltage circuit breaker - Google Patents
Production and approximation control method for instantaneous calibration current of low voltage circuit breaker Download PDFInfo
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Abstract
The invention relates to a production and approximation control method for instantaneous calibration current of a low voltage circuit breaker. The concrete steps include modulating an electric voltage regulator of an instantaneous calibration current generating main circuit, connecting four coils of a primary side of a large current transformer in series, calculating circuit power factor angles and calculating test floating voltage U' 40 corresponding to 4IN according to initial current; adjusting the electric voltage adjuster, connecting the four coils of the primary side of the large current transformer in series, adjusting voltage of a secondary side of the large current transformer to U' 40, closing the circuit, adjusting the current to 4IN in a loop-closed manner, disconnecting the circuit and detecting floating voltage U40; calculating an 8-time or 12-time voltage compensation index k8 or k12 by a neural network controller; if the instantaneous calibration current is not qualified, modifying floating voltage U80 or U120 and a switching-in phase angle through summaK1DeltaI and summaKPsiDeltaPsi respectively; adopting feedback control in combination with electric voltage regulation for ensuring precision of U80 and U120; conducting an instantaneous calibration test; performing error analysis of calibration current after the instantaneous calibration test; conducting online training through an online network training mechanism.
Description
Technical field
Technical scheme relates to the dynamic verification test of low-voltage circuit breaker wink, specifically moves the generation of verification electric current low-voltage circuit breaker wink and approaches control method.
Background technology
Generation main circuit for moving verification electric current low-voltage circuit breaker wink is generally adopted strong current transformer former limit tap at present, it is ensured that former secondary no-load voltage ratio is 1,8,12.When the catalyst being connected with tap is respectively closed, strong current transformer secondary voltage is similar to maintenance 1, 8, the relation of 12 times, specified in order to carry out respectively, 8 times specified, 12 times of rated current tests, avoid the electric voltage regulator being connected with strong current transformer to change on a large scale, but due to strong current transformer former limit employing is one group of coil, carry out 8 times with the test of 12 times of rated current time primary side current of transformer very big, the wire diameter needing primary coil is very big, and for carrying out rated current test, former limit total number of turns value is very big, thus adding the volume of strong current transformer, its production cost is increased.
Wink dynamic verification electric current has the features such as amplitude is big, precision is high, aperiodic component is little.Due to the requirement of overload protection characteristics, even if chopper flows through 8INElectric current, INFor rated current, also to thread off when electric current continues more than 200ms.Therefore, accurately making a determination, the persistent period of verification electric current should be strict controlled in 200ms.It addition, the dropout of electrical apparatus release is one is converted to heat by electricity, thus causing the process of deformation, and there are relation size of current and persistent period.This will verify electric current should be rapidly achieved the amplitude of requirement within the time of regulation, and transitional processes is short.And the feedback control of routine and constant current technology are required for an adjustment time, therefore here and inapplicable, so dynamic verification of general wink electric current controls as opened loop control, Shortcomings in the precision improving test current.
Its process of the test is test product internal resistance on-line checking, produces rated current initially with feedback control adjustment during test, by detecting band load voltage and floating voltage, calculates the internal resistance of chopper and the internal resistance of experiment power supply.Relation between them is:
U10=rsIN+U1(1)
Wherein: U10For floating voltage, rsIt is the equivalent internal resistance of power supply, U1Band load voltage, i.e. the product of test product internal resistance and electric current.
The switching of strong current transformer former limit combines with electronic pressure regulation, produces the voltage that verification electric current is corresponding.Generation 8I can be derivedNCorresponding floating voltage U80:
U80=8rsIN+8U1=8U10(2)
By the switching of catalyst, it is possible to obtain a rough 8INCorresponding floating voltage, then adopts feedback control, coordinates electronic pressure regulation to ensure U80Precision.8I is obtained by phase selectionN。
But, rsComprising former limit reduced resistance, it is not a constant numerical value, affect it because have: the no-load voltage ratio number of turn of strong current transformer, the electronic no-load voltage ratio number of turn from even pressure regulator, be a very complicated function, it is impossible to Precise Representation.Processing method time actually used is to make U80=8k8U10.Definition k8Being 8 times of current compensation factor, it is approximately equal to 1, is manually set according to practical situation.Define k equally12It is 12 times of current compensation factor.Ensure to move in wink the precision of debugging electric current, penalty coefficient k8With k12It is crucial, due to the factors such as power supply, electric voltage regulator and strong current transformer capacity, the penalty coefficient k that the wink streaming current of each grade requires8And k12Being different, the wink streaming current error that therefore system produces is bigger.
Summary of the invention
The technical problem to be solved is: providing the generation moving verification electric current low-voltage circuit breaker wink and approach control method, the former limit of strong current transformer is four coil L1、L2、L3、L4, the turn ratio of four coils is 2:2:1:1, takes electronic pressure regulation and coil string the mode that combines to reduce footpath, strong current transformer former sideline, save cost in process of the test；Moving verification test wink can repeat to re-start, the current error of this test as the correction of test next time, can form a broad sense closed loop control.Control to adopt the complex neural network Step wise approximation control method based on on-line training, aperiodic component and amplitude error are realized successive elimination, improve the control accuracy moving verification electric current wink.
This invention address that the generation moving verification electric current this technical problem the technical scheme is that low-voltage circuit breaker wink and approach control method, comprising the concrete steps that:
The first step, regulate the electric voltage regulator moving verification electric current generation main circuit wink, and four, former limit of strong current transformer coils connected in series, an initial voltage is produced at strong current transformer secondary, corresponding generation initial current, counter circuit power-factor angle, namely required closing phase angle, and calculate 4I according to initial currentNCorresponding test floating voltage U '40；
Second step, regulates electric voltage regulator and four, former limit of strong current transformer coils connected in series, strong current transformer secondary voltage is adjusted U '40, closing circuit, electric current is adjusted 4I by closed loopN, disconnecting circuit detection floating voltage U40；
3rd step, moves the expectation electric current I of debugging nerve network controller wink as requested*, floating voltage U corresponding to circuit power factor angle, 4 times of rated current40, calculate 8 times or 12 times of voltage compensation coefficient k8Or k12, and calculate 8 times or 12 times of rated no-load voltage U respectively according to formula (3) or (4)80Or U120；
U80=2k8U40(3)
U120=3k12U40(4)
4th step, if wink dynamic verification test current is defective, then by ∫ K1ΔI、∫KψΔ ψ is respectively to floating voltage U80Or U120It is modified with closing phase angle, ∫ K1Δ I is the accumulation item of current amplitude error；∫KψΔψAccumulation item for closing phase angle error；
5th step, strong current transformer primary coil L1And L3Series connection, L2And L4After series connection, then by the coils from parallel connection of coils after two groups of series connection, obtain 8INCorresponding test floating voltage U80, then adopt feedback control, coordinate electronic pressure regulation to ensure U80Precision；
Or two, former limit of strong current transformer coil working, coil L1And L2Parallel connection, obtains 12INCorresponding test floating voltage, then adopts feedback control, coordinates electronic pressure regulation to ensure floating voltage U120Precision；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle, carries out wink dynamic verification test；
7th step, after wink dynamic test test, carry out the error analysis of verification electric current, the error of high-ranking officers' galvanoscope is decomposed into owing to phase selection is forbidden the aperiodic component Δ ψ that brings, is transient error, and test voltage inaccuracy brings current amplitude error delta I, by to current-responsive waveform segments integration, can decomposition computation current amplitude error and transient error, respectively provide the tolerance limit of current amplitude error and transient error simultaneously, to produce electric current be made whether qualified evaluation；
8th step, carries out on-line training by online network training mechanism, and training and sample regulation rule are decided to be (∫ KIΔI)2+(∫KψΔψ)2Carry out after exceeding a certain numerical value, aperiodic component and current amplitude error are realized successive elimination.
The invention has the beneficial effects as follows: the former limit moving verification electric current generation main circuit strong current transformer wink is four coils, carry out 4 times of rated current four coils connected in series of test；Carry out 8 times of rated current test L1And L3Series connection, L2And L4After series connection, then by the coils from parallel connection of coils after two groups of series connection；Carry out 12 times of rated current tests, coil L1With L2Parallel connection, adds the utilization rate of strong current transformer primary coil through above-mentioned change, reduces the wire diameter of primary coil simultaneously, is substantially reduced the volume of strong current transformer, has saved production cost；Test repeatably feature according to wink dynamic verification, it is proposed that the thought of verification electric current broad sense closed loop control, by the error of last time as the correction regulated quantity of this test, the control accuracy moving verification electric current wink can be improved.
Compared with prior art, the generation moving verification electric current low-voltage circuit breaker wink of the present invention with the significant progress approaching control method is:
(1) error of high-ranking officers' galvanoscope is decomposed into owing to phase selection is forbidden the aperiodic component brought and test voltage inaccuracy to bring current amplitude error, by to current-responsive waveform segments integration, current amplitude error and transient error can be decomposed, propose the comprehensive tolerance limit of the two error, whether qualified evaluate verification electric current.
(2) design achieves the verification electric current neural network control method of broad sense closed loop, adopts the control method of Step wise approximation, solves verification electric current it is difficult to ensure that be rapidly achieved the problem requiring amplitude.
(3) nerve network controller can on-line training, when model output error exceedes tolerance limit, according to the new online re-training of data sample.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is low-voltage circuit breaker wink dynamic verification electric current generation main circuit diagram.
Fig. 2 be move in low-voltage circuit breaker wink verification electric current generation with approach control method workflow diagram.
Detailed description of the invention
Move in low-voltage circuit breaker wink of the present invention verification electric current generation with approach control method, comprise the concrete steps that:
The first step, regulate the electric voltage regulator moving verification electric current generation main circuit wink, and four, former limit of strong current transformer coils connected in series, an initial voltage is produced at strong current transformer secondary, corresponding generation initial current, counter circuit power-factor angle, namely required closing phase angle, and calculate 4I according to initial currentNCorresponding test floating voltage U '40；
Second step, regulates electric voltage regulator and four, former limit of strong current transformer coils connected in series, strong current transformer secondary voltage is adjusted U '40, closing circuit, electric current is adjusted 4I by closed loopN, disconnecting circuit detection floating voltage U40；
3rd step, moves the expectation electric current I of debugging nerve network controller wink as requested*, floating voltage U corresponding to circuit power factor angle, 4 times of rated current40, calculate 8 times or 12 times of voltage compensation coefficient k8Or k12, and calculate 8 times or 12 times of rated no-load voltage U respectively according to formula (3) or (4)80Or U120；
U80=2k8U40(3)
U120=3k12U40(4)
4th step, if wink dynamic verification test current is defective, then by ∫ K1ΔI、∫KψΔ ψ is respectively to floating voltage U80Or U120It is modified with closing phase angle, ∫ K1Δ I is the accumulation item of current amplitude error；∫KψΔ ψ is the accumulation item of closing phase angle error；
5th step, strong current transformer primary coil L1And L3Series connection, L2And L4After series connection, then by the coils from parallel connection of coils after two groups of series connection, obtain 8INCorresponding test floating voltage U80, then adopt feedback control, coordinate electronic pressure regulation to ensure U80Precision；
Or two, former limit of strong current transformer coil working, coil L1And L2Parallel connection, obtains 12INCorresponding test floating voltage, then adopts feedback control, coordinates electronic pressure regulation to ensure floating voltage U120Precision；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle, carries out wink dynamic verification test；
7th step, after wink dynamic test test, carry out the error analysis of verification electric current, the error of high-ranking officers' galvanoscope is decomposed into owing to phase selection is forbidden the aperiodic component Δ ψ that brings, is transient error, and test voltage inaccuracy brings current amplitude error delta I, by to current-responsive waveform segments integration, can decomposition computation current amplitude error and transient error, respectively provide the tolerance limit of current amplitude error and transient error simultaneously, to produce electric current be made whether qualified evaluation；
8th step, carries out on-line training by online network training mechanism, and training and sample regulation rule are decided to be (∫ KIΔI)2+(∫KψΔψ)2Carry out after exceeding a certain numerical value, aperiodic component and current amplitude error are realized successive elimination.
Ensure to move in wink the precision of debugging electric current, penalty coefficient k8Or k12It it is a crucial factor.Moving the expectation electric current of debugging, the power-factor angle in loop, test product impedance and impedance loop wink is the key parameter affecting penalty coefficient.These parameters connect each other, influence each other and mutually restrict, and are multi-data fusion systems, and neutral net is best suitable for such issues that solve.BP network is current most widely used neural network model, and it has powerful non-linear mapping capability and fault tolerance, and its learning rules are to adjust network weight by back propagation and threshold value makes network error quadratic sum minimum.Move the expectation electric current I of debugging BP nerve network controller wink as requested*, floating voltage U corresponding to the power-factor angle in loop, 4 times of rated current40, calculate 8 times or 12 times of voltage compensation coefficient k8Or k12, and calculate 8 times or 12 times of rated no-load voltage U80Or U120。
Moving verification test wink can repeat to re-start, the current error of this test as the correction of test next time, can form a broad sense closed loop control.Control to adopt the complex neural network Step wise approximation control method based on on-line training, aperiodic component and amplitude error are realized successive elimination.Wherein ∫ K1Δ I is the accumulation item of current amplitude error；∫KψΔ ψ is the accumulation item of closing phase angle error.By ∫ K1ΔI、∫KψThe Δ ψ correction to test voltage and closing phase angle, it is ensured that the Step wise approximation of controlled volume.
The error carrying out verification electric current is decomposed and evaluates
1) amplitude error of electric current:
Alternating current circuit combined floodgate after current is:
Wherein: ψ voltage closing phase angle,Hookup power-factor angle, ImThe amplitude of current cycle component.
The verification electric current produced has steady-state component i1With transient state component i2Two parts form.Wherein transient state component i2Present exponential damping.It is generally acknowledged and work asRear i2≈0.Therefore, the verification electric current array that detection obtains takes a section rearward just it is believed that only comprise steady-state component i1.Seek root-mean-square value by this segment data, be the virtual value I of electric current.It with move the expectation electric current I of debugging wink*Between error delta I=I*-I, is amplitude error.
2) aperiodic component (transient error) of electric current:
The aperiodic component of electric current ask for the method that can adopt integration.Theoretical derivation is as follows.By (5) both sides from 0～tNIntegration
AllowK is integer, ensures simultaneouslyThen the Section 1 on formula (6) right side is 0.
IfSubstitution formula (6) can obtain after arranging
Formula (7) left side is to verifying on current time from 0～tNIntegration, it can use verification current sampling data time upper 0～tNSum replaces.Can obtain after arrangement
In above formula, T is the sampling period of verification electric current.
According to above error analysis decomposition result, draw the analytic method of steady-state error, transient error respectively, the voltage of test next time and phase selection phase angle can be adjusted with them, with round-off error respectively.
3) evaluation of electric current is verified:
The error of verification electric current phase selection error and amplitude, from the different links of testing equipment, closing phase angle error is voltage compensation and electric adjustable pressure ring joint, and amplitude error is that power factor detection performs link with phase selection.It is also required to carry out respectively to the evaluation of verification electric current.A link error is had just to exceed standard it is believed that the precision of verification electric current is not reaching to requirement.
The evaluation of verification current amplitude error can adopt relative error EI.Assuming that relative error is qualified less than 3%.Namely
The aperiodic component that can obtain according to formula (7) and the amplitude I of current cycle componentmRelative error Eψ, evaluate phase selection error.Assuming that maximum relative error is qualified less than 5%.Namely
Namely
From formula (10), the amplitude I to aperiodic component and current cycle componentmRelative error EψRestriction, be to phase selection angular accuracy requirement simultaneously.
With problems such as ageing equipments, some parameters to change, and always adopts unalterable training sample and object vector in neural metwork training mechanism, and long-play can produce bigger error.Adopt on-line tuning method constantly to change input sample and object vector, make them constantly close to the actual value of equipment.The core of on-line training mechanism is the error transfer factor training data sample according to actual current and expectation electric current.Replacement training sample need to be followed and constantly expand training sample, makes in sample containing different grades of expectation electric current；For avoiding input vector to become single data sample, it is ensured that expectation electric current is different brackets, and in former input vector immediate with it one group is replaced by newly inputted vector；Reject differing too many fault data with training sample, namely reject the principle of unusual sample.Often changing a training sample, network re-training once, calculates voltage compensation coefficient, then is produced mechanism's generation wink dynamic debugging electric current by electric current.Training rules and sample regulation rule are decided to be (∫ KIΔI)2+(∫KψΔψ)2Carry out after exceeding a certain numerical value.
Fig. 2 shows, the generation moving verification electric current low-voltage circuit breaker wink of the present invention with the workflow approaching control method is:
(1) start → whether starting test, if not starting experiment, continuing waiting for；If starting test, enter step (2)；
(2) output small voltage, small area analysis, the power-factor angle of counter circuit also calculates 4IN4 times of corresponding rated no-load voltage U '40；
(3) electric voltage regulator and coil combination 4 times of rated no-load voltage U of output are regulated40；
(4) nerve network controller calculates output 8 times or 12 times of rated no-load voltage compensation coefficient k8Or k12, and calculate 8 times or 12 times of rated no-load voltage U80Or U120；
(5) whether verification electric current mark of conformity is 0, if verification electric current mark of conformity is 0, then test voltage and closing phase angle is modified, i.e. closing phase angle and 8 times or 12 times of rated no-load voltage U80Or U120Error correction；If verification electric current mark of conformity is not 0, then regulate electric voltage regulator and coil combination output 8 times or 12 times of rated no-load voltages；
(6) phase selection carries out wink dynamic verification test；
(7) verifying decomposition and the evaluation of electric current, it is judged that whether verification electric current is qualified, if qualified, verification electric current mark of conformity puts 1, then judges whether to test next time；If defective, verification electric current mark of conformity sets to 0, then judges whether neural network sample updates, if updating, is then updated sample on-line training, judges whether to afterwards test next time again；If not updating, then directly judge whether to test next time；
(8) if judge whether to test next time, then step (2) is returned；If judge to be made without testing next time, then directly exit.
Embodiment 1
Move the generation of verification electric current the low-voltage circuit breaker wink of the present embodiment and approach control method, choosing the 8 times of rated current wink dynamic verification tests of low-voltage circuit breaker that rated current is 250A and carry out.
The first step, regulate the electric voltage regulator moving verification electric current generation main circuit wink, and four, former limit of strong current transformer coils connected in series, a small voltage is produced at strong current transformer secondary, corresponding generation electric current, the power-factor angle of counter circuit is 0.4rad, namely required closing phase angle, and is 10.20V according to the floating voltage that this Current calculation 1000A is corresponding；
Second step, regulates electric voltage regulator and 4, former limit of strong current transformer coils connected in series, strong current transformer secondary voltage adjusts 10.20V, close circuit, and electric current is adjusted 1000A by closed loop, and disconnecting circuit detection floating voltage is 10.54V；
3rd step, that moves debugging nerve network controller wink as requested expects the floating voltage 10.54V that electric current 2000A, the power-factor angle 0.4rad in loop, 4 times of rated current are corresponding, calculates 8 times of voltage compensation coefficient K8It is 1.01, and calculates 8 times of rated no-load voltage U80For 21.30V.
4th step, for first time test without test voltage and closing phase angle are modified；
5th step, strong current transformer primary coil L1、L3Series connection, L2、L4After series connection, then by above two groups of coils from parallel connection of coils, then adopt feedback control, coordinate electronic pressure regulation to make the floating voltage of test loop be 21.19V；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle 0.4rad, carries out wink dynamic verification test；
7th step, after testing actual verification electric current 2080.5A, Δ I=80.5A；EI> 3%, Eψ< 5%, so verification current precision is defective.
8th step, calculates (∫ KIΔI)2+(∫KψΔψ)2Less than tolerance limit, neural network sample is without updating, without on-line training；
Verification electric current is defective, tests next time
Repeat above first, second and third step.
4th step, by ∫ KIΔ I is to test voltage U80It is modified；
5th step, strong current transformer primary coil L1、L3Series connection, L2、L4After series connection, then by above two groups of coils from parallel connection of coils, then adopt feedback control, coordinate electronic pressure regulation to make the floating voltage of test loop be 20.39V；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle 0.4rad, carries out wink dynamic verification test；
7th step, after testing actual verification electric current 2001.5A, Δ I=1.5A；EI=0.075%, Eψ< 5%, so verification current precision is qualified.
Embodiment 2
Move the generation of verification electric current the low-voltage circuit breaker wink of the present embodiment and approach control method, choosing the 12 times of rated current wink dynamic verification tests of low-voltage circuit breaker that rated current is 200A and carry out.
The first step, regulate the electric voltage regulator moving verification electric current generation main circuit wink, and four, former limit of strong current transformer coils connected in series, a small voltage is produced at strong current transformer secondary, corresponding generation electric current, the power-factor angle of counter circuit is 1.51rad, namely required closing phase angle, and is 8.16V according to the floating voltage that this Current calculation 800A is corresponding；
Second step, regulates electric voltage regulator and 4, former limit of strong current transformer coils connected in series, strong current transformer secondary voltage adjusts 8.16V, close circuit, and electric current is adjusted 800A by closed loop, disconnecting circuit detection floating voltage 8.17V；
3rd step, that moves debugging nerve network controller wink as requested expects the floating voltage 8.17V that electric current 2400A, the power-factor angle 1.51rad in loop, 4 times of rated current are corresponding, calculates 12 times of voltage compensation coefficient K12It is 1.004, and calculates 12 times of rated no-load voltage U120For 24.62V.
4th step, for first time test without test voltage and closing phase angle are modified；
5th step, strong current transformer primary coil L1、L3Series connection, L2、L4After series connection, then by above two groups of coils from parallel connection of coils, then adopt feedback control, coordinate electronic pressure regulation to make the floating voltage of test loop be 24.49V；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle 1.51rad, carries out wink dynamic verification test；
7th step, after testing actual verification electric current 2405A, Δ I=5A；EI=0.208%, Eψ> 5%, so verification current precision is defective.
8th step, calculates (∫ KIΔI)2+(∫KψΔψ)2Less than tolerance limit, neural network sample is without updating, without on-line training；
Verification electric current is defective, tests next time
Repeat above first, second and third step.
4th step, by ∫ KψClosing phase angle is modified by Δ ψ.
5th step, strong current transformer primary coil L1、L3Series connection, L2、L4After series connection, then by above two groups of coils from parallel connection of coils, then adopt feedback control, coordinate electronic pressure regulation to make the floating voltage of test loop be 24.49V；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle 1.525rad, carries out wink dynamic verification test；
7th step, after testing actual verification electric current 2404.4A, Δ I=4.4A；EI=0.183%, Eψ< 5%, so verification current precision is qualified.
Embodiment 3
Move the generation of verification electric current the low-voltage circuit breaker wink of the present embodiment and approach control method, choosing the 8 times of rated current wink dynamic verification tests of low-voltage circuit breaker that rated current is 100A and carry out.
Expectation electric current is 800A in the present embodiment, carry out test of many times, it is divided into two classes, a kind of is that train samples does not update and neutral net does not carry out on-line training, another kind of for neutral net according to moving producing and approaching the 8th step of control method when satisfying condition of verification electric current low-voltage circuit breaker wink, carry out Sample Refreshment and neural metwork training.Under the mode that sample after a while does not update, dynamic verification of actual output wink electric current is 787.2A, and Sample Refreshment to carry out dynamic verification of actual output wink electric current under the mode of on-line training be 800.9A, it is seen that after adding Neural Network Online training institution, there is higher control accuracy.
Strong current transformer primary coil is divided into four by above-described embodiment, adopts the mode of coil combination to carry out different tests.
In above-described embodiment, 8 times are calculated by nerve network controller with 12 times of rated voltage penalty coefficients.
In above-described embodiment, after wink dynamic test test, carrying out error analysis, the error of high-ranking officers' galvanoscope is decomposed into owing to phase selection is forbidden the aperiodic component Δ ψ that brings, and test voltage inaccuracy brings amplitude error Δ I, in order to be respectively processed；Respectively provide their tolerance limit simultaneously, the electric current produced is made whether qualified evaluation.
In above-described embodiment, the current error of this test as the correction of test next time, can form a broad sense closed loop control, controls to adopt the complex neural network Step wise approximation control method based on on-line training, aperiodic component and amplitude error are realized successive elimination.
Claims (1)
1. move in low-voltage circuit breaker wink verification electric current generation with approach control method, comprise the concrete steps that:
The first step, regulate the electric voltage regulator moving verification electric current generation main circuit wink, and four, former limit of strong current transformer coils connected in series, an initial voltage is produced at strong current transformer secondary, corresponding generation initial current, counter circuit power-factor angle, namely required closing phase angle, and calculate 4I according to initial currentNCorresponding test floating voltage U '40；
Second step, regulates electric voltage regulator and four, former limit of strong current transformer coils connected in series, strong current transformer secondary voltage is adjusted U '40, closing circuit, electric current is adjusted 4I by closed loopN, disconnecting circuit detection floating voltage U40；
3rd step, moves the expectation electric current I of debugging nerve network controller wink as requested*, floating voltage U corresponding to circuit power factor angle, 4 times of rated current40, calculate 8 times or 12 times of voltage compensation coefficient k8Or k12, and calculate 8 times or 12 times of rated no-load voltage U respectively according to formula (3) or (4)80Or U120；
U80=2k8U40(3)
U120=3k12U40(4)
4th step, if wink dynamic verification test current is defective, then by ∫ K1ΔI、∫KψΔ ψ is respectively to floating voltage U80Or U120It is modified with closing phase angle, ∫ K1Δ I is the accumulation item of current amplitude error；∫KψΔ ψ is the accumulation item of closing phase angle error；
5th step, strong current transformer primary coil L1And L3Series connection, L2And L4After series connection, then by the coils from parallel connection of coils after two groups of series connection, obtain 8INCorresponding test floating voltage U80, then adopt feedback control, coordinate electronic pressure regulation to ensure U80Precision；
Or two, former limit of strong current transformer coil working, coil L1And L2Parallel connection, obtains 12INCorresponding test floating voltage, then adopts feedback control, coordinates electronic pressure regulation to ensure floating voltage U120Precision；
6th step, controls controllable silicon and connects loop, phase selection when voltage-phase is circuit power factor angle, carries out wink dynamic verification test；
7th step, after wink dynamic test test, carry out the error analysis of verification electric current, the error of high-ranking officers' galvanoscope is decomposed into owing to phase selection is forbidden the aperiodic component Δ ψ that brings, is transient error, and test voltage inaccuracy brings current amplitude error delta I, by to current-responsive waveform segments integration, can decomposition computation current amplitude error and transient error, respectively provide the tolerance limit of current amplitude error and transient error simultaneously, to produce electric current be made whether qualified evaluation；
8th step, carries out on-line training by online network training mechanism, and training and sample regulation rule are decided to be (∫ KIΔI)2+(∫KψΔψ)2Carry out after exceeding a certain numerical value, aperiodic component and current amplitude error are realized successive elimination.
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| CN111030041A (en) * | 2019-12-27 | 2020-04-17 | 中国人民解放军海军潜艇学院 | Current control method and control device for checking circuit breaker |
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| CN2821593Y (en) * | 2005-09-29 | 2006-09-27 | 河北工业大学 | Instantaneous property detector for plastic shell breaker |
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| US20130080095A1 (en) * | 2008-04-16 | 2013-03-28 | Phoenix Broadband Technologies, Llc | Measuring and monitoring a power source |
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| US20130080095A1 (en) * | 2008-04-16 | 2013-03-28 | Phoenix Broadband Technologies, Llc | Measuring and monitoring a power source |
| US20090322358A1 (en) * | 2008-06-30 | 2009-12-31 | Hioki Denki Kabushiki Kaisha | Resistance measuring apparatus |
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| CN111030041A (en) * | 2019-12-27 | 2020-04-17 | 中国人民解放军海军潜艇学院 | Current control method and control device for checking circuit breaker |
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