CN101107682A - Change action monitoring device for on-load tap changers - Google Patents
Change action monitoring device for on-load tap changers Download PDFInfo
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- CN101107682A CN101107682A CNA2006800028937A CN200680002893A CN101107682A CN 101107682 A CN101107682 A CN 101107682A CN A2006800028937 A CNA2006800028937 A CN A2006800028937A CN 200680002893 A CN200680002893 A CN 200680002893A CN 101107682 A CN101107682 A CN 101107682A
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Abstract
A change action monitoring device for an on-load tap changer enables adoption of a relatively simple and inexpensive torque detecting means by mitigating the requirement of the detection accuracy of the start time of a change action, enables accurate, infallible grasp of torque waveform caused by a change action of a tap switch, and enables high-accuracy judgment of an abnormal state of a change action. The change action monitoring device comprises waveform processing means (47) composed of a third low-pass filter (70) for creating torque waveform processing data including torque waveform data from which the noise component is removed, first and second low-pass filters (71, 72) having cut-off frequencies lower than that of the third low-pass filter and adapted for creating torque waveform shaping data, first and second differentiators (73, 74) each for extracting the occurrence time of the extremum of the waveform produced by differentiating the torque waveform shaping data in a predetermined time range with respect to time, as an action reference time, a multiplier (75), and a local maxima extracting circuit (76).
Description
Technical field
The present invention relates to monitor the change action monitoring device of on-load tap changers of operate condition of on-load tap changers of transformer of packing into.
Background technology
The on-load tap changers that is used for transformer is by the on-load tap changers with diverter switch, tap selector and transducer; And the operating mechanism formation of operating this on-load tap changers, the change action monitoring device of the on-load tap changers of the operate condition of supervision on-load tap changers for example has the device that is disclosed in patent documentation 1 and the patent documentation 2.
The change action monitoring device that is disclosed in the patent documentation 1 has: the torque sensor portion that comes the torque that the driving shaft of detecting operation mechanism produces with the relevant pattern of a succession of change action; The switch mode judegment part of the switch mode of the change action of differentiation diverter switch, tap selector and transducer; The normal torque pattern storage portion of the torque mode when storing each switch mode regular event; According to select from the output of switch mode judegment part in this switch mode the normal torque pattern, with compare the unusual local unusual local detection unit of acts of determination from the output of torque sensor portion; And according to the change tendency from the output of torque sensor portion of the torque mode just often that does not detect remarkable action, proofread and correct the normal torque pattern correction unit of the memory contents of normal mode storage part.
Switching torque mode during switching that this device detects with torque sensor portion during by change action relatively and switching torque mode are just often judged unusual locally, in addition, survey the downward trend of long-term cut-out torque, correction normal torque pattern.
In addition, by selecting and the corresponding normal torque pattern of each switch mode, compare, differentiating has no abnormally, according to the time of unusual generation, determines local unusually.
In addition, the change action monitoring device shown in the patent documentation 2 has: the current detecting unit of the motor current of detecting operation mechanism; Detect the torque detecting unit of the driving shaft torque of on-load tap changers; The pattern recognition unit of the pattern of the change action of identification on-load tap changers; To the identification of each pattern and gather motor current Wave data in the change action that current detecting unit detects, and the switch data collecting unit of the torque Wave data that detects of torque detecting unit; To each recognized action mode initialization monitored object particular data, the fiducial value of monitored object particular data that preestablishes this each pattern and the reference data setup unit that allows amplitude of fluctuation and stored; Extract particular data extraction unit with the corresponding particular data of predefined monitored object particular data respectively from the motor current Wave data gathered and torque Wave data; And the particular data that relatively extracts is with the corresponding fiducial value of this pattern, the acts of determination state is unusual abnormality juding unit when surpassing the permission amplitude of fluctuation.
This device is because for the torque Wave data that detects with the torque detecting unit, suppose the action moment of diverter switch, tap selector and transducer, preestablish the regular hour width, the peaked point of waveform in the time width is regarded as specified point, extract the torque value and the generation moment thereof of this point, the fiducial value of setting with the reference data setup unit compares, when surpassing the permission amplitude of fluctuation, the acts of determination state is unusual, therefore handle simply, and can carry out high-precision judgement.
Patent documentation 1: the spy opens flat 04-137511 communique
Patent documentation 2: specially permit communique No. 3189542
The change action monitoring device of on-load tap changers in the past constitutes as described above, the abnormal operation status detection is the torque Wave data that will detect and just often torque Wave data compares, when surpassing the permission amplitude of fluctuation, the acts of determination state is unusual, therefore handle simply, and can carry out high-precision judgement.But, in fact utilize the detected torque Wave data of torque detecting unit on the driving shaft the be installed in operating on-load tap changers interference components that on the torque Wave data of original expression change action state, superposeed, formed the pulsating waveform that is difficult to read actual torque value under a lot of situations.
Yet, when for example the breakdown torque that takes place in obtaining the change action of diverter switch is as desirable particular data, as mentioned above, be the maximum of obtaining the torque data of in the regular hour width, observing.And this observation time width is to be the zero hour with change action that benchmark is set.Thereby in order to obtain correct performance data, prerequisite is the zero hour that correctly detects change action.When in the time width of setting according to incorrect zero hour, observing, might with occur in this time width, with think it is maximum by mistake according to above-mentioned particular data according to the different maximum of above-mentioned particular data.
Have, when the torque Wave data formed the pulsating waveform of the interference components that superposeed, if consider the influence of these interference components, then this observation time width should be set narrowly as far as possible again, and the zero hour that correctly positively detects change action is just more important.
Therefore, for example in the torque detecting unit 24 shown in the patent documentation 2 in front (with reference to document Fig. 1), the special customed product that the driving shaft one of employing and operating mechanism manufactures and designs is realized the correct zero hour of grasping change action, otherwise but, unavoidably increased installation cost.Particularly when wanting that existing changer introduced this monitoring arrangement again, on-the-spot improvement project is very complicated loaded down with trivial details, and cost also rises, and these problems have hindered popularizing of this device.
The present invention proposes in order to address the above problem just, its purpose is to provide a kind of change action monitoring device of on-load tap changers, this device relaxes the accuracy of detection requirement for the zero hour of change action, can adopt the torque detecting unit of easier cheapness, have again, even detected torque detection waveform comprises the pulsating waveform of interference components, also can correctly positively grasp the change action of following diverter switch and the torque Wave data that produces, can judge the abnormality of change action accurately.
Summary of the invention
The change action monitoring device of the on-load tap changers that the present invention is relevant has:
Detection has the torque detecting unit of the driving shaft torque that is produced on the driving shaft of operating mechanism of operation of on-load tap changers of diverter switch, tap selector and transducer;
The pattern recognition unit of the pattern of the change action of identification on-load tap changers;
The torque Wave data collecting unit that utilizes the torque Wave data of the driving shaft torque that the torque detecting unit detects, each pattern is gathered with pattern recognition unit identification;
Each pattern to on-load tap changers is set the monitored object particular data, sets its fiducial value and is allowed the management value of amplitude of fluctuation and the reference data setup unit of storing;
Have to disturb and remove circuit, waveform shaping circuit, and the waveform processing unit of action benchmark moment extraction unit, the torque Wave data that circuit extraction torque Wave data collecting unit is gathered is removed in aforementioned interference, by remove the frequency component of the 1st frequency that surpasses regulation from the torque Wave data that extracts, and the torque waveform processing data that interference components is removed in generation, the forementioned waveform shaping circuit is by removing the frequency component that surpasses than the 2nd frequency that remains with the low regulation of the 1st frequency set in the scope that torque that the change action of following diverter switch produces changes the torque waveform after the shaping from torque waveform processing data, and generation torque waveform shaping data, the aforementioned activities benchmark constantly extraction unit extract with the torque waveform shaping data of official hour scope carry out time diffusion waveform extreme value generation constantly, as the action benchmark constantly;
According to the action benchmark moment and torque waveform processing data, extraction and the corresponding data of monitored object particular data extracted with this waveform processing unit, as the particular data extraction unit of particular data; And
Relatively utilize this particular data extraction unit particular data that extracts and the fiducial value of setting with the reference data setup unit, when surpassing the management value that allows amplitude of fluctuation, be judged to be unusual abnormality juding unit.
The present invention as mentioned above, particularly remove circuit owing to being provided with to have to disturb, waveform shaping circuit, and the waveform processing unit of action benchmark moment extraction unit, circuit is removed the 1st frequency that surpasses regulation by the torque Wave data of self-torque detecting unit always frequency component is removed in this interference, and the torque waveform processing data that interference components is removed in generation, this waveform shaping circuit is by removing the frequency component that surpasses than remaining with the 2nd low frequency of the 1st frequency set in the scope that torque that the change action of following diverter switch produces changes the torque waveform after the shaping from torque waveform processing data, and generation torque waveform shaping data, this action benchmark constantly extraction unit extract with the torque waveform shaping data of official hour scope carry out time diffusion waveform extreme value generation constantly, as the action benchmark constantly, therefore the torque that occurs existing in the change action of diverter switch on torque waveform shaping data changes becomes maximum point, extract this moment constantly as the action benchmark, by like this, even the switching of judging according to the torque Wave data that comes the self-torque detecting unit produces some errors the zero hour, also can detect the change action of following diverter switch really and the torque data that produces can be carried out high-precision abnormality juding with the formation of easy cheapness.
Description of drawings
Figure 1 shows that the on-load tap changers of the invention process form 1 and the pie graph of change action monitoring device thereof.
Figure 2 shows that the circuit diagram of the circuit formation of on-load tap changers.
Figure 3 shows that the graph of a relation of the on-state of the tap joint position of on-load tap changers and each inscape.
Fig. 4 is the oscillogram of each pattern of on-load tap changers.
Figure 5 shows that the formation block diagram of the change action monitoring device of on-load tap changers.
The inside that Figure 6 shows that the waveform processing unit 47 of Fig. 5 constitutes block diagram.
Figure 7 shows that the oscillogram of the waveform processing process of the torque Wave data in the waveform processing unit 47.
Figure 8 shows that the formation block diagram of change action monitoring device of the on-load tap changers of the invention process form 2.
Fig. 9 is for to represent and the corresponding test item figure of pattern with list.
Figure 10 shows that the torque waveform processing data example schematic the when rising of changing tap-change operation is switched.
Label declaration
30 on-load tap changers, 31 diverter switches, 32 tap selectors, 33 transducers, 34 driving shafts, 40 change action monitoring devices, the rotating part of 41 torque detecting units, the fixed part of 42 torque detecting units, 43 signal processing units, 44 pattern recognition units, 45 torque Wave data collecting units, 46 reference data setup units, 47 waveform processing unit, 48 particular data extraction units, 49 abnormality juding unit, 61 particular data storage cell, 62 particular data management value computing units, 63 reference data setup units, 70 the 3rd low pass filters, 71 the 1st low pass filters, 72 the 2nd low pass filters, 73 the 1st differentiators, 74 the 2nd differentiators, 75 multipliers, 76 maximum are extracted circuit, 80 torque detecting units.
Embodiment
Below, the invention process form 1 is described.Figure 1 shows that the pie graph of change action monitoring device of the on-load tap changers of example 1.
On-load tap changers 30 has diverter switch 31, tap selector 32 and transducer 33, and is contained in the transformer 50.
On-load tap changers 30 utilizes operating mechanism 35 to operate, and is connected with driving shaft 34 between the motor 36 of on-load tap changers 30 and the inside that is arranged on operating mechanism 35.And, the torque detecting unit 80 of the driving torque during to this driving shaft 34 installation and measurings operation.
Here, torque detecting unit 80 as the torque that detects driving shaft 34, the torque detecting unit of divergence type that employing also can be less expensive when existing on-load tap changers is set up change action monitoring device realizes easily, that constitute by rotating part 41 and fixed part 42, below its formation of explanation.
On being installed in driving shaft 34, in the rotating part 41 that the rotation of driving shaft 34 is rotated, have the periphery of drive shaft rotating of being installed in 34, the torque sensor and the 1st Transmit-Receive Unit of detection driving shaft torque, the battery that drives them was housed in the while.Be fixed in the fixed part 42 of inside of operating mechanism 35, have for example use infrared signal etc. by wireless mode and the 1st Transmit-Receive Unit of rotating part 41 between carry out the 2nd Transmit-Receive Unit of handshaking.In addition, rotating part 41 omits with the diagram of the inside formation of fixed part 42.
Then, send the switching command signal of on-load tap changers from the 2nd Transmit-Receive Unit of fixed part 42, the 1st Transmit-Receive Unit with rotating part 41 receives, by like this from the battery supply power, torque sensor begins to detect action, send this detection data from the 1st Transmit-Receive Unit of rotating part 41, receive, send to torque Wave data collecting unit 45 described later with the 2nd Transmit-Receive Unit of fixed part 42.
As mentioned above, this divergence type torque detecting unit 80 can easyly constitute at an easy rate, and minimally suppresses the battery consumption of dress in this rotating part 41, gives full play to practicality.But, depending on the circumferential locations of the driving shaft 34 of accepting the rotating part 41 of switching command signal when fixed part 42 sends torques and detects commencing signals, the torque data of detection can postpone to the moment that fixed part 42 begins to send.That is, produce the shortcoming problem that becomes in the present application, that can not grasp switching zero hour of torque Wave data with enough precision.Specifically, for example about maximum delay 200ms.
Although the present invention has this shortcoming, but can detect the change action of following diverter switch really and the torque data that produces, the details of the main points of its realization as described later, get back to earlier constitute its prerequisite, on-load tap changers and the formation of change action monitoring device and the explanation of action.
Change action monitoring device 40 is with the sampling period of assigned frequency, be taken into the torque Wave data of the torque sensor detection that utilizes rotating part 41, as voltage level signal, send with the wireless signal that has carried out digital signalization, receive with fixed part 42, the major part that inputs to action monitor is that signal processing is independent 43, carries out the supervision of the change action of on-load tap changers 30.
The circuit that Figure 2 shows that general on-load tap changers 30 constitutes.
State representation on-load tap changers 30 shown in Figure 2 is along ascent direction, the state that promptly stops in tap joint position 5 after the finishing switching of tap joint position 5 from tap joint position 4.Also shown in the on-state of the tap joint position of switching as the rising of Fig. 35 like that, the odd side of tap selector 32 and tap 5 are connected, even number side and tap 4 are connected, transducer 33 with+connect, diverter switch 31 is connected with odd side, along the tap of main winding 51a → rough segmentation joint winding 51b → rough segmentation joint winding 51b+→ path of the odd side → diverter switch 31 of tap 5 → tap selector 32 of transducer 33 → segmentation joint winding 51c → segmentation joint winding 51c, form current path.
If from this state again along with precedingly once switch the ascent direction of equidirectional, promptly switch to tap joint position 6 from tap joint position 5, then at first the even number side of the tap selector 32 of no current path from tap 4 change actions to 6, diverter switch 31 change actions are to the even number side then, become the state of the connection tap joint position 6 that the rising of Fig. 3 switches.
Opposite with last time, from state shown in Figure 2 along descent direction, promptly when tap joint position 5 is returned original tap joint position 4 (below, to switch towards being called counter-rotating) with last rightabout switching, the even number side of tap selector 32 is owing to be positioned at target tap joint position 4, so tap selector 32 does not need to carry out change action again.Thereby tap selector 32 does not carry out change action, and only diverter switch 31 is carried out change action from odd side to the even number side, becomes the state of the connection tap joint position 4 that the decline of Fig. 3 switches.
In addition, in above-mentioned any switching, transducer 33 be failure to actuate (below, the switching that transducer 33 is failure to actuate is called common tap-change operation).As shown in Figure 3, only in rise switching from tap joint position 10 to tap joint position 11 switch and descending switch from tap joint position 10 when tap joint position 9 is switched, transducer 33 actions (below, the switching that transducer 33 is moved is called the conversion tap-change operation).
As mentioned above, the action of on-load tap changers 30, if put in order according to the operate condition of each inscape, rise respectively and descend under the situation that then having 31 actions of diverter switch only to rise respectively and descends down to switch, the action of following tap selector 32 actions situation about switching and follow tap selector 32 and action that transducer 33 moves under rise respectively and descend 6 kinds of situations of situation of switching, the exercises state is discerned as pattern.
In 6 kinds of patterns of on-load tap changers respectively detected torque waveform as shown in Figure 4, the torque value that rises in switching detects in+side, the torque value that descends in switching detects in a side, their waveform forms near symmetrical shape mutually.
Figure 5 shows that the block diagram of the change action monitoring device of above-mentioned such on-load tap changers that moves.Monitor the change action monitoring device 40 of the change action of on-load tap changers 30, be made of torque detecting unit 80 and signal processing unit 43, this torque detecting unit 80 is made of the fixed part 42 that is installed in the rotating part 41 that has torque sensor on the driving shaft 34 and receive from the detection data of torque sensor with wireless signal.
In addition, signal processing unit 43 has: the pattern recognition unit 44 of the pattern of the change action of identification on-load tap changers 30; The torque Wave data collecting unit 45 that utilizes torque Wave data in the change action of the on-load tap changers 30 that torque detecting unit 80 detects with pattern recognition unit 44 identification, each pattern is gathered; To each pattern setting monitored object particular data of on-load tap changers 30, the reference data setup unit 46 that preestablishes its fiducial value and allow amplitude of fluctuation and store; Be described in detail with reference to Fig. 6 and Fig. 7 in the back again, extract torque Wave datas that torque Wave data collecting unit 45 gathers and the action benchmark waveform processing unit 47 constantly that extracts above-mentioned diverter switch 31 according to the torque Wave data that extracts; According to the action benchmark that extracts with this waveform processing unit 47 constantly and torque waveform processing data, extraction and the corresponding data of monitored object particular data as the particular data extraction unit 48 of particular data; And relatively utilize the particular data of these particular data extraction unit 48 extractions to be judged to be unusual abnormality juding unit 49 with the fiducial value of setting with reference data setup unit 46, when surpassing the management value of permission amplitude of fluctuation.
Below, the action of each inscape of each inscape is described.In Fig. 1 and Fig. 5, the rotating part 41 of torque detecting unit 80 is installed on the drive shaft rotating 34, owing to can not be taken into the dtc signal of detection with wired mode, therefore the data that will detect with fixed part 41 send as the wireless signal that carries out digital signalization with the sampling period of cycle of regulation, for example hundreds of Hz, receive with fixed part 42, be taken into signal processing unit 43 as the torque Wave data.
In the pattern recognition unit 44 in signal processing unit 43, according to tap-change operation signal OS and tap joint position signal PS from operating mechanism 35, the change action of identification on-load tap changers 30, i.e. identification switching at every turn that situation about switching is risen and descends in 31 actions of diverter switch only down respectively, rise respectively and descend under the action of following tap selector 32 actions situation about switching and follow tap selector 32 and action that transducer 33 moves under rise respectively and descend 6 kinds of patterns shown in Figure 4 of situation of switching.
In torque Wave data collecting unit 45, gather with torque detecting unit torque Wave data 80 detections, that utilize pattern recognition unit 44 that each pattern is discerned.
In reference data setup unit 46, as the monitored object particular data, torque value when setting the moving separately of tap selector 32, transducer 33, diverter switch 31, action are constantly with respect to the benchmark action time difference and the fiducial value of the reference torque value of change action finish time of diverter switch 31 etc. constantly, preestablish the permission amplitude of fluctuation of each fiducial value, for example ± 25% or ± 50% etc. numerical value, and stored.
Below, describe the formation and the action of waveform processing unit 47 in detail with reference to Fig. 6 and Fig. 7.The inside that Figure 6 shows that waveform processing unit 47 constitutes block diagram, Figure 7 shows that the oscillogram of each waveform processing process of the torque Wave data in the waveform processing unit 47.
This waveform processing unit 47 be conceived to the diverter switch 31 of all moving in whole switch modes of 6 switch modes shown in Figure 4, particularly the rapid torque during its change action reduces characteristic and the device invented.That is, this change action be by the stored energy mechanism from diverter switch be maximum energy storage state quickly exoergic realize.In this process, though the torque that driving shaft 34 produces sharply reduces to the minimum that becomes the exoergic state from the maximum of energy storage state, notice the time variation that in its process, there is torque, be that the time diffusion value of torque becomes the great moment.
Then, the moment of taking place for the maximum that in the observation time width of trying one's best wide, also can detect this torque differential value really, the torque Wave data that will obtain from torque detecting unit 80, being used in the low pass filter that remains with the change action of following diverter switch 31 and have extremely low cut-off frequency in the scope that the torque that produces changes handles, be suppressed near the torque waveform shaping data of the generation of the maximum that can take place the front and back in the moment that above-mentioned maximum takes place by such generation as far as possible, according to these torque waveform shaping data, detect the moment of the maximum generation of above-mentioned torque differential value accurately, promptly move the benchmark moment, this should finish the present application.
Obtain in theory that the concrete processing that realizes foregoing is diversified in specifications to be easy to surely, inventor etc. have carried out finishing analysis to 2000 the huge data of surpassing of various change conditional parameters, and the result can find the optimum specifications of following explanation.
Below, describe with reference to Fig. 6 and Fig. 7.At first, come the torque Wave data of self-torque Wave data collecting unit 45, handle,, send to particular data extraction unit 48 with having removed the torque waveform processing data of the interference components that produces when torque detects with the 3rd low pass filter 70.
The 3rd low pass filter 70 is to constitute to disturb the low pass filter of removing circuit, the original waveform of the torque Wave data of the monitored object that torque Wave data collecting unit 45 is gathered is removed processing as interference, carrying out Fourier transform handles, low pass filter with the component that extracts 0～6Hz (the 1st frequency) carries out filter process, by exporting as torque waveform processing data like this.Fig. 7 (a) is depicted as the waveform of these torque waveform processing data.
The 1st low pass filter 71 and the 2nd low pass filter 72 are the low pass filters that constitute waveform shaping circuit, to be used in the low pass filter that remains with the change action of following diverter switch 31 and have extremely low cut-off frequency (the 2nd frequency) in the scope that the torque that produces changes from the torque waveform processing data of the 3rd low pass filter 70 and handle, by such output torque waveform shaping data.
With standard change action time of diverter switch 31 as the frequency in 1/2 cycle during as reference frequency f, the cut-off frequency f1 of the 1st low pass filter 71 is set at the value than the band width Δ f of the low regulation of reference frequency f, in addition, the cut-off frequency f2 of the 2nd low pass filter 72 is set at the value than the band width Δ f of the high regulation of reference frequency.
In this example example, specifically, if f=2.5Hz, Δ f=0.5Hz, then the 1st low pass filter plays as having than to remove the function of low pass filter that interference components is the cut-off frequency of the low f1=f-Δ f=2.0Hz of the cut-off frequency 6Hz of purpose the 3rd low pass filter 70, remove the frequency component that surpasses it, export the 1st torque waveform shaping data.Fig. 7 (b) is depicted as the waveform of the 1st torque waveform shaping data.
The 2nd low pass filter 72 plays the function as the low pass filter of the cut-off frequency with f2=f+ Δ f=3.0Hz lower than the cut-off frequency 6Hz of the 3rd low pass filter 70, removes the frequency component above it, exports the 2nd torque waveform shaping data.Fig. 7 (c) is depicted as the waveform of the 2nd torque waveform shaping data.
If the setting that constitutes the design of the low pass filter of these waveform shaping circuits, particularly its cut-off frequency then near the prototype of torque waveform processing data, can not make differential maximum described later and other approaching maximum create a difference than higher.Otherwise in addition, if cut-off frequency is low excessively, then the torque the during change action of diverter switch 31 changes slowly, and this differential maximum itself is not easy to differentiate, and still can not create a difference with other maximum.The set point of above-mentioned low pass filter 73 and 74 concrete cut-off frequency is that the result of the cut-and-trial of carrying out according to aforesaid a large amount of experiments obtains.
The 1st differentiator 73 and the 2nd differentiator 74 are respectively the 1st torque waveform shaping data from the 1st low pass filter 71 to be reached the differentiator that carries out the time diffusion computing from the 2nd torque waveform shaping data of the 2nd low pass filter 72, and the maximum point that changes for the torque in the change action of obtaining diverter switch 31 is provided with.
Maximum is extracted circuit 76 search from its maximum in the observation time scope of the regulation on the product waveform of multiplier 75, extracts as the action benchmark constantly, sends to particular data extraction unit 48.
In addition, utilize above-mentioned the 1st and the 2nd differentiator 73 and 74, multiplier 75 and maximum to extract circuit 76, constitute the action benchmark moment extraction unit of the application's claim 1.
If with shown in Fig. 7 (a) from the torque Wave data only remove interference components torque waveform processing data, with to this torque waveform processing data recycle waveform shaping circuit 71 and 72, differentiator 73 and 74 and multiplier 75 add that the product waveform shown in Fig. 7 (d) of waveform processed compares, then as can be known, the latter is formed on the waveform that torque variation part is greatly represented significantly outstanding peak value, and level reduces near this peak value front and back constantly.Thereby, as mentioned above, being used for change action that the data of self-torque detecting unit 80 obtain for example exists the delay of 200ms the zero hour, under the circumstances, the observation time scope that above-mentioned maximum is used is searched in expansion, also can extract really really to be equivalent to move the benchmark peaked moment constantly.
In addition, in the filter constants of the above-mentioned the 1st and the 2nd low pass filter 71 and 72 is set, establish Δ f=0.5Hz.But in the scope of Δ f=0.5～1.0Hz, can access approximately uniform effect, promptly can extract the action benchmark really constantly.
In addition, as waveform shaping circuit, be to constitute with the 1st low pass filter 71 and the 2nd low pass filter 72, with standard change action time of diverter switch 31 as the frequency in 1/2 cycle during as reference frequency f, the 1st low pass filter 71 is set at cut-off frequency f1 the value of hanging down the band width Δ f of regulation than reference frequency f, the 2nd low pass filter 72 is set at cut-off frequency f2 the value of the band width Δ f that stipulates than the reference frequency height, but in application of the present invention, not necessarily be defined in this formation.
In particular data extraction unit 48, from torque waveform processing data and the benchmark action data of handling with waveform processing unit 47 constantly, extract and use the corresponding data of monitored object particular data of each pattern of reference data setup unit 46 settings, as particular data.
If describe with reference to Fig. 7 (a), then for example on torque waveform processing data, with the most approaching action benchmark constantly the maximum before the tp take place the action zero hour that (tp-td) constantly is defined as diverter switch 31, will followed by the action benchmark constantly the minimum after the tp release that (tp+to) constantly be defined as diverter switch 31 takes place constantly.Then, extracting this action zero hour and release time width (td+to) constantly is the operate time of diverter switch 31, as performance data.
In addition, the torque value (τ o) of torque waveform processing data in the release moment (tp+to) is defined as the reference torque value, torque (τ p-τ o) when the torque value (τ p) that extracts the action zero hour (tp-td) and the difference of reference torque value (τ o) are the action of diverter switch 31 is as performance data.
In addition, be as the reference torque value with the release of diverter switch 31 torque value constantly, but for tap selector 32 or the transducer 33 beyond the diverter switch 31, also can with according to the torque fiducial value of the torque value regulation of finish time of this diverter switch 31 as its torque fiducial value, obtain torque when respectively moving.
In abnormality juding unit 49, relatively utilize particular data extraction unit 48 particular data that action is extracted constantly according to torque waveform processing data and benchmark, with reference data setup unit 46 that set with the fiducial value corresponding monitored object particular data of pattern, when its difference is no more than the permission amplitude of fluctuation, be judged to be regular event, when surpassing the permission amplitude of fluctuation, be judged to be remarkable action, and the output result of determination.
For tap selector 32 and transducer 33, also according to about the identical main points of the above explanation of diverter switch 31, according to separately operate time section moment of peak value of expression product waveform, extract the action benchmark constantly, according to the torque waveform processing data and the action benchmark moment, the torque when operate time of extraction tap selector 32 and transducer 33 and action is as performance data, and compare with corresponding fiducial value separately, by carrying out the judgement of remarkable action like this.
As mentioned above, in example 1 of the present invention, even the switching of judging according to the torque Wave data that comes self-torque detecting unit 80 produces some errors the zero hour, also can detect the change action of following diverter switch 31 really and the torque data that produces can be carried out high-precision abnormality juding with the formation of easy cheapness.
Example 2
Here the situation that will illustrate is, for the numerical value of front with each fiducial value and the permission amplitude of fluctuation thereof of reference data setup unit 46 settings of Fig. 5, the timeliness that adds the operation actual achievement of following on-load tap changers changes, and proofreaies and correct, and the change action more suitable by such realization monitors.Below, be that the center describes with different part with the example 1 of front.
Figure 8 shows that the block diagram of change action monitoring device of the on-load tap changers of the invention process form 2.For the signal processing unit illustrated in fig. 5 43 of front, additional particular data storage cell 61 and particular data management value computing unit 62 are provided with reference data setup unit 63.Below, illustrate with these changing units to be the action at center.
In particular data extraction unit 48, according to the torque waveform processing data of handling with waveform processing unit 47, extract reference data setup unit 63 that set with the corresponding data of monitored object particular data each pattern, as particular data, to 49 outputs of abnormality juding unit, as the storage data, deposit the particular data storage cell 61 of following explanation in simultaneously.
Further specify the extraction of the particular data of particular data extraction unit 48 again.
Fig. 9 is the list with the corresponding test item of each pattern, is the extraction project of particular data with zero part of representing.
Figure 10 shows that the example of torque waveform processing data when the rising of conversion tap-change operation is switched of handling with waveform processing unit 47.The following describes from the extraction order of the project of respectively extracting of torque waveform processing data extract particular data shown in Figure 9.
(1) for torque waveform processing data (for example Figure 10), with waveform processing unit 47 specified action benchmark constantly tp be benchmark, set extract diverter switch 31, tap selector 32 and transducer 33 operate time section action constantly and the time period of torque value.
(2) according to diverter switch 31 at the constantly later torque value of release, regulation torque fiducial value τ o.
(3) the action zero hour of regulation diverter switch 31 and the release moment, compulsory exercise time and action torque value.
(4) the torque value extraction time section of carrying out tap selector 32 and transducer 33 is set, and the generation moment and the torque value thereof of regulation torque peak extract and move constantly and the action torque value.
(5), obtain switching time and torque integrated value according to torque waveform processing data.
(6) Gui Ding each data are to particular data storage cell 61 and 49 outputs of abnormality juding unit.
In abnormality juding unit 49, relatively utilize torque waveform processing data that particular data extraction unit 48 extracts, with reference data setup unit 63 that set with the fiducial value corresponding monitored object particular data of pattern, when its difference is no more than the permission amplitude of fluctuation, be judged to be regular event, when surpassing the permission amplitude of fluctuation, be judged to be remarkable action, and the output result of determination.
In particular data storage cell 61, will put in order by the time sequence each pattern and monitored object from the particular data of particular data extraction unit 48, and store.
In particular data management value computing unit 62, reach moment of predefined data number at the storage data number of particular data storage cell 61, each pattern and extraction project are carried out statistical disposition, calculating mean value and standard deviation etc.
According to mean value that calculates and standard deviation, each particular data is set the management value of fiducial value and permission amplitude of fluctuation thereof, and upgrade the management value of reference data setup unit 63.
The management value of reference data setup unit 63 is to be updated to standard with each store predetermined data number, but also can implement by every run duration through regulation.
In addition, after the change action monitoring device of on-load tap changers 30 just has been provided with, though there are not the actual achievement data, can not set reference data to reference data setup unit 63, but, set the reference data of initial condition according to testing and try out resulting data by the action after the monitoring arrangement manufacturing.
In addition, the high part of the switching frequency of the diverter switch 31 of on-load tap changers 30, because of changing operate times such as consumption of electrode, but if the renewal resume of the management value of Memory Reference data enactment unit 63, then also can diagnose the timeliness degradation mode of on-load tap changers 30.
As mentioned above, in example 2 of the present invention, owing to change corresponding with the driving torque generation timeliness of on-load tap changers 30, the actual achievement data of every store predetermined number, just upgrade the management value of monitored object particular data automatically, do not need as in the past for new management value more and the accumulative total operation of the torque Wave data that carries out and for the set point of new management value more and the data acquisition of carrying out and the renewal operation of management value, obtain to suppress the effect of operating cost.
In addition, in each variation of the present invention since with standard change action time of diverter switch as the frequency in 1/2 cycle during as reference frequency,
Waveform shaping circuit constitutes by removing respectively from torque waveform processing data to surpass than the 1st low pass filter of the frequency component of the frequency of the band width of the low regulation of reference frequency and remove the 2nd low pass filter that surpasses than the frequency component of the frequency of the band width of the high regulation of reference frequency
The action benchmark constantly extraction unit by will from the output of the 1st low pass filter carry out differential the 1st differentiator, will from the output of the 2nd low pass filter carry out differential the 2nd differentiator, calculate from the long-pending multiplier of the output of two differentiators and extract and extract circuit as action benchmark maximum constantly constantly from the generation of the maximum in the official hour scope of the product waveform of this multiplier and constitute, therefore can detect the action benchmark accurately constantly.
In addition, because the cut-off frequency of the 1st low pass filter is made as the frequency than the low 0.5～1Hz of reference frequency, the cut-off frequency of the 2nd low pass filter is made as the frequency than the high 0.5～1Hz of reference frequency, therefore can detect the action benchmark accurately really constantly.
In addition, because the particular data extraction unit is in torque waveform processing data, to be defined as the action zero hour of diverter switch the maximum generation moment of the most approaching action benchmark before the moment respectively, the release that will diverter switch take place constantly to be defined as followed by the minimum of action benchmark after constantly constantly, extracting the action zero hour and release time width constantly is the operate time of diverter switch, as performance data, therefore can grasp diverter switch really has no abnormal operate time when operation.
In addition, because the particular data extraction unit is defined as the reference torque value with torque waveform processing data at release torque value constantly, the torque when difference of extracting the torque value of action zero hour and reference torque value is the action of diverter switch, therefore as performance data, torque has no abnormal in the time of can grasping the action of diverter switch when operation really.
In addition, because the torque detecting unit has rotating part and fixed part, this rotating part is installed in the periphery of drive shaft rotating, have the torque sensor and the 1st Transmit-Receive Unit that detect the driving shaft torque, this fixed part have utilize wireless mode and the 1st Transmit-Receive Unit between carry out the 2nd Transmit-Receive Unit of handshaking
Send the own switching command signal that carries tap changer from the 2nd Transmit-Receive Unit of fixed part, the 1st Transmit-Receive Unit with rotating part receives, begin to detect action by such torque sensor, send this detection data from the 1st Transmit-Receive Unit of rotating part, the 2nd Transmit-Receive Unit with fixed part receives, send to torque Wave data collecting unit, therefore can easyly realize the torque detecting unit at an easy rate, also easy for the installation of existing product.
In addition, owing to have particular data storage cell and particular data management value computing unit, each particular data that this particular data storage cell is extracted this each pattern memory by using particular data extraction unit, this particular data management value computing unit deposits this particular data storage cell in for each particular data with ormal weight, just each pattern and each monitored object particular data are extracted the particular data of storage, carry out statistical disposition, calculate the fiducial value of each monitored object particular data and the management value of permission amplitude of fluctuation, upgrade fiducial value and change permission amplitude that the reference data setup unit is set, therefore can consider the operation actual achievement, carry out more suitable change action and monitor.
In addition, owing to utilize particular data management value computing unit to upgrade the fiducial value of reference data setup unit setting and the management value of change permission amplitude, the storage data reach when predefined data are counted at every turn carries out, and therefore can positively upgrade processing smoothly.
In addition,, carry out in the time of during every process is predefined, therefore can positively upgrade processing smoothly owing to utilize particular data management value computing unit to upgrade the fiducial value of reference data setup unit setting and the management value of change permission amplitude.
In addition, because when the management value of the fiducial value of upgrading the setting of reference data setup unit and change permission amplitude, the management value of fiducial value before the storage update and change permission amplitude, with the resume of the management value of fiducial value and change permission amplitude preserve regulation during, therefore also can diagnose the timeliness degradation mode of on-load tap changers.
Claims (10)
1. the change action monitoring device of an on-load tap changers is characterized in that, has:
Detection has the torque detecting unit of the driving shaft torque that is produced on the driving shaft of operating mechanism of operation of on-load tap changers of diverter switch, tap selector and transducer;
Discern the pattern recognition unit of pattern of the change action of described on-load tap changers;
Utilize the torque Wave data of the described driving shaft torque that described torque detecting unit detects, each pattern gathered the torque Wave data collecting unit of this torque Wave data with the identification of described pattern recognition unit;
Each pattern to described on-load tap changers is set the monitored object particular data, sets its fiducial value and is allowed the management value of amplitude of fluctuation and the reference data setup unit of storing;
Have to disturb and remove circuit, waveform shaping circuit, and the waveform processing unit of action benchmark moment extraction unit, the torque Wave data that the described torque Wave data of circuit extraction collecting unit is gathered is removed in described interference, by remove the frequency component of the 1st frequency that surpasses regulation from the torque Wave data that extracts, and generate the torque waveform processing data remove behind the interference components, described waveform shaping circuit is set in the scope that torque that the change action of following described diverter switch produces changes by removing from described torque waveform processing data to surpass to remain with the torque waveform after shaping, the frequency component of the 2nd frequency of the regulation lower than described the 1st frequency, and generation torque waveform shaping data, described action benchmark constantly extraction unit extract with the described torque waveform shaping data of official hour scope carry out the waveform behind the time diffusion extreme value generation constantly, as the action benchmark constantly;
According to the action benchmark moment and described torque waveform processing data, extraction and the corresponding data of described monitored object particular data extracted with this waveform processing unit, as the particular data extraction unit of particular data; And
Relatively utilize this particular data extraction unit particular data that extracts and the fiducial value of setting with described reference data setup unit, when surpassing the management value of described permission amplitude of fluctuation, be judged to be unusual abnormality juding unit.
2. the change action monitoring device of on-load tap changers as claimed in claim 1 is characterized in that,
With standard change action time of described diverter switch as the frequency in 1/2 cycle as reference frequency
Described waveform shaping circuit constitutes by removing respectively from described torque waveform processing data to surpass than the 1st low pass filter of the frequency component of the frequency of the band width of the low regulation of described reference frequency and remove the 2nd low pass filter that surpasses than the frequency component of the frequency of the band width of the high regulation of described reference frequency
Described action benchmark constantly extraction unit by will from the output of described the 1st low pass filter carry out differential the 1st differentiator, will from the output of described the 2nd low pass filter carry out differential the 2nd differentiator, calculate from the long-pending multiplier of the output of described two differentiators and extract and extract circuit as described action benchmark maximum constantly constantly from the generation of the maximum in described official hour scope of the product waveform of this multiplier and constitute.
3. the change action monitoring device of on-load tap changers as claimed in claim 2 is characterized in that,
The cut-off frequency of described the 1st low pass filter is made as the frequency than the low 0.5～1Hz of described reference frequency, and the cut-off frequency of described the 2nd low pass filter is made as the frequency than the high 0.5～1Hz of described reference frequency.
4. the change action monitoring device of on-load tap changers as claimed in claim 1 is characterized in that,
Described particular data extraction unit is in described torque waveform processing data, to be defined as the action zero hour of described diverter switch the most approaching maximum generation moment of described action benchmark before the moment respectively, the release moment of described diverter switch will take place constantly to be defined as followed by the minimum of described action benchmark after the moment, the time width that extracts the described action zero hour and the release moment is the operate time of described diverter switch, as described performance data.
5. the change action monitoring device of on-load tap changers as claimed in claim 4 is characterized in that,
Described particular data extraction unit is defined as the reference torque value with described torque waveform processing data at described release torque value constantly, the torque when difference of extracting the torque value of described action zero hour and described reference torque value is the action of described diverter switch is as described performance data.
6. the change action monitoring device of on-load tap changers as claimed in claim 1 is characterized in that,
Described torque detecting unit has rotating part and fixed part, described rotating part is installed in the periphery of the described driving shaft of rotation, have the torque sensor and the 1st Transmit-Receive Unit that detect described driving shaft torque, described fixed part have utilize wireless mode and described the 1st Transmit-Receive Unit between carry out the 2nd Transmit-Receive Unit of handshaking
Send switching command signal from the 2nd Transmit-Receive Unit of described fixed part from described on-load tap changers, the 1st Transmit-Receive Unit with described rotating part receives, begin to detect action by described like this torque sensor, send this detection data from the 1st Transmit-Receive Unit of described rotating part, the 2nd Transmit-Receive Unit with described fixed part receives, and sends to described torque Wave data collecting unit.
7. the change action monitoring device of on-load tap changers as claimed in claim 1 is characterized in that,
Have particular data storage cell and particular data management value computing unit, each particular data that described particular data storage cell is extracted the described particular data extraction unit of this each pattern memory by using, described particular data management value computing unit deposits this particular data storage cell in for each particular data with ormal weight, just each described pattern and each monitored object particular data are extracted the particular data of storage, carry out statistical disposition, calculate the fiducial value of each described monitored object particular data and the management value of permission amplitude of fluctuation, upgrade the fiducial value of described reference data setup unit setting and the management value of change permission amplitude.
8. the change action monitoring device of on-load tap changers as claimed in claim 7 is characterized in that,
Utilize described particular data management value computing unit to upgrade the fiducial value of described reference data setup unit setting and the management value of change permission amplitude, the storage data reach when predefined data are counted at every turn carries out.
9. the change action monitoring device of on-load tap changers as claimed in claim 7 is characterized in that,
Utilize described particular data management value computing unit to upgrade the fiducial value of described reference data setup unit setting and the management value of change permission amplitude, carry out in the time of during every process is predefined.
10. the change action monitoring device of on-load tap changers as claimed in claim 7 is characterized in that,
When the management value of the fiducial value of upgrading described reference data setup unit setting and change permission amplitude, the management value of fiducial value before the storage update and change permission amplitude, with the resume of the management value of described fiducial value and change permission amplitude preserve regulation during.
Applications Claiming Priority (3)
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| JP2005135878 | 2005-05-09 | ||
| JP135878/2005 | 2005-05-09 | ||
| JP139456/2005 | 2005-05-12 |
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| CN100587863C CN100587863C (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200680002893A Expired - Fee Related CN100587863C (en) | 2005-05-09 | 2006-04-27 | Change action monitoring device for on-load tap changers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255892A (en) * | 2014-07-02 | 2016-12-21 | 欧米克朗电子仪器有限公司 | For testing the method and device of the tap transducer of transformator |
| CN109883467A (en) * | 2017-12-06 | 2019-06-14 | 技嘉科技股份有限公司 | Multi input self-regulation detector and multi input self-regulation detection method |
| CN112136195A (en) * | 2018-06-19 | 2020-12-25 | 株式会社东芝 | Electric operation device for tap changer and tap changing method |
| CN114174819A (en) * | 2019-10-08 | 2022-03-11 | 三菱电机工程技术株式会社 | State monitoring device, state monitoring system, and state monitoring method |
-
2006
- 2006-04-27 CN CN200680002893A patent/CN100587863C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255892A (en) * | 2014-07-02 | 2016-12-21 | 欧米克朗电子仪器有限公司 | For testing the method and device of the tap transducer of transformator |
| US10663516B2 (en) | 2014-07-02 | 2020-05-26 | Omicron Electronics Gmbh | Method and device for testing a tap changer of a transformer |
| CN109883467A (en) * | 2017-12-06 | 2019-06-14 | 技嘉科技股份有限公司 | Multi input self-regulation detector and multi input self-regulation detection method |
| CN112136195A (en) * | 2018-06-19 | 2020-12-25 | 株式会社东芝 | Electric operation device for tap changer and tap changing method |
| CN114174819A (en) * | 2019-10-08 | 2022-03-11 | 三菱电机工程技术株式会社 | State monitoring device, state monitoring system, and state monitoring method |
| CN114174819B (en) * | 2019-10-08 | 2024-04-16 | 三菱电机工程技术株式会社 | State monitoring device, state monitoring system, and state monitoring method |
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| CN100587863C (en) | 2010-02-03 |
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