WO2006120919A1 - 負荷時タップ切換器の切換動作監視装置 - Google Patents
負荷時タップ切換器の切換動作監視装置 Download PDFInfo
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- WO2006120919A1 WO2006120919A1 PCT/JP2006/308856 JP2006308856W WO2006120919A1 WO 2006120919 A1 WO2006120919 A1 WO 2006120919A1 JP 2006308856 W JP2006308856 W JP 2006308856W WO 2006120919 A1 WO2006120919 A1 WO 2006120919A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H2009/0061—Monitoring tap change switching devices
Definitions
- the present invention relates to a switching operation monitoring device for a load tap changer that monitors an operation state of a load tap changer incorporated in a transformer.
- a load tap changer used in a transformer is composed of a load switch having a changeover switch, a tap selector, and a converter, and an operation mechanism for operating the load tap changer.
- Patent Document 1 and Patent Document 2 disclose a monitoring apparatus for switching operation of a load tap changer that monitors the switching operation of a load tap changer.
- the switching operation monitoring device disclosed in Patent Document 1 includes a tornolec sensor unit, a switching switch, a tap selector, and a converter that detect torque generated on a drive shaft of an operation mechanism in a pattern related to a series of switching operations.
- a switching pattern discriminating unit that discriminates the switching pattern of the switching operation, a normal torque pattern storage unit that memorizes the tornec pattern during normal operation for each switching pattern, and a normal torque no. Normal pattern based on the fluctuation tendency of the output from the abnormal part determining unit that selects the turn and compares the output from the torque sensor unit to determine the abnormal part, and the normal Tonlek pattern when no abnormal operation is detected
- a normal torque pattern correction unit that corrects the memory contents of the storage unit is provided.
- the apparatus determines an abnormal part by comparing a switching torque pattern at the time of switching detected by the torque sensor unit during switching operation with a switching torque pattern at the time of normal operation. Detect the downward trend and correct the normal torque pattern.
- the apparatus determines the presence or absence of an abnormality by selecting and comparing normal torque patterns corresponding to each switching pattern, and identifies an abnormal part based on the time of occurrence of the abnormality.
- the switching operation monitoring device disclosed in Patent Document 2 includes a current detection unit that detects a motor current of an operation mechanism, a torque detection unit that detects a drive shaft torque of a load tap changer, and a load tap change.
- An operation mode identification means for identifying the operation mode of the switching operation of the device;
- Reference data setting means for setting the data and presetting and storing the reference value and allowable fluctuation range of the monitoring target specific data for each operation mode, preset from the recorded motor current waveform data and torque waveform data
- Specific data extraction means for extracting specific data corresponding to specific data to be monitored, and the operation status is abnormal when the extracted specific data is compared with the reference value corresponding to the operation mode and the allowable fluctuation range is exceeded. Is provided with an abnormality determination means.
- the device assumes a predetermined time width in advance, assuming the operation time of the switching switch, the tap selector, and the converter with respect to the torque waveform data detected by the torque detecting means.
- the point of the maximum value of the waveform in the width is recognized as a specific point, the torque value at that point and the time of occurrence are extracted, and compared with the reference value set in the reference data setting means, the allowable fluctuation range is exceeded. In this case, the operation state is determined to be abnormal, so that the processing is simple and accurate determination is possible.
- Patent Document 1 Japanese Patent Laid-Open No. 04-137511
- Patent Document 2 Japanese Patent No. 3189542
- the conventional switching operation monitoring device for the on-load tap changer is configured as described above, and the detection of the abnormal operation state is performed by comparing the detected torque waveform data with the normal torque waveform data.
- the allowable fluctuation range is exceeded, it is judged that the operating state is abnormal, and the process is simple and can be judged with high accuracy.
- the torque waveform data detected by the torque detector attached to the drive shaft of the on-load tap changer during operation is superimposed on the torque waveform data indicating the original switching operation state.
- the pulsation waveform is often difficult to read the actual torque value.
- this observation time width should be set as narrow as possible in consideration of the effects of these noise components, and the switching operation start time can be accurately determined. It is even more important to detect this.
- the torque detection means 24 (see Fig. 1) disclosed in Patent Document 2 above uses a custom-made product that is designed and manufactured integrally with the drive shaft of the operation mechanism. Accurate grasping of the start time of the switching operation has been realized, but the cost of the equipment is unavoidable. In particular, when this type of monitoring device is to be introduced into an existing tap switching device, the remodeling work at the site becomes complicated and complicated, and the cost increases, and these problems hinder the spread of this type of device. Was.
- the present invention has been made to solve the above-described problems, and relaxed the requirement for detection accuracy at the start time of the switching operation, thereby enabling the use of a relatively simple and inexpensive torque detection means. Furthermore, even if the detected torque waveform data is a pulsation waveform containing noise components, the torque waveform data associated with the switching operation of the switching switch can be grasped accurately and accurately, and the abnormal state of the switching operation can be accurately detected. It is an object of the present invention to provide a switching operation monitoring device for a tap changer during load that can be determined.
- a switching operation monitoring device for an on-load tap changer includes a drive generated on a drive shaft of an operating mechanism for operating the on-load tap changer including a change-over switch, a tap selector, and a converter.
- Torque detection means for detecting shaft torque
- operation mode identification means for identifying the operation mode of the switching operation of the on-load tap changer
- torque waveform data of the drive shaft torque detected by the torque detection means as operation mode identification means
- the torque waveform data recorded in the reference data setting means and the torque waveform data recording means are extracted, and the noise component is removed by removing the frequency component exceeding the predetermined first frequency from the extracted torque waveform data.
- Noise removal circuit that creates waveform processing data, frequency components that exceed a predetermined second frequency that is lower than the first frequency that is set in the range where the torque change associated with the switching operation of the switching switch remains in the shaped torque waveform
- a waveform shaping circuit that creates torque waveform shaping data by removing the torque waveform processing data from the torque waveform processing data, and the generation time of the extreme value of the waveform obtained by time differentiation of the torque waveform shaping data in a predetermined time range is extracted as the operation reference time
- the waveform processing means provided with the operation reference time extracting means, and the operation reference time and the torque wave extracted by the waveform processing means.
- the specific data extraction means that extracts the data corresponding to the monitoring target specific data from the processing data as specific data, and the specific data extracted by the specific data extraction means and the reference value set by the reference data setting means are compared. And an abnormality determination means for determining an abnormality when the control value of the allowable fluctuation range is exceeded.
- the present invention particularly eliminates the noise component from the torque waveform data from the torque detection means to remove the frequency component exceeding the predetermined first frequency, thereby generating the torque waveform processing data for generating the torque waveform processing data.
- FIG. 1 is a diagram showing a configuration of a load tap changer and its switching operation monitoring device according to Embodiment 1 of the present invention.
- FIG. 2 is a circuit diagram showing a circuit configuration of a load tap changer.
- FIG. 3 is a diagram showing the relationship between the tap position of the on-load tap changer and the input state of each component.
- FIG. 4 is a waveform diagram for each operation mode of the load tap changer.
- FIG. 5 is a block diagram showing a configuration of a switching operation monitoring device for a load tap changer.
- FIG. 6 is a block diagram showing an internal configuration of the waveform processing means 47 of FIG.
- FIG. 7 is a diagram showing a waveform in the waveform processing process of torque waveform data in the waveform processing means 47.
- FIG. 8 is a block diagram showing a configuration of a switching operation monitoring device for a on-load tap changer according to Embodiment 2 of the present invention.
- FIG. 9 is a diagram showing a list of detection items corresponding to operation modes.
- FIG. 10 is a diagram showing an example of torque waveform processing data in the case of ascent switching of conversion tap switching.
- FIG. 1 is a diagram showing a configuration of a switching operation monitoring device for a load tap changer according to the first embodiment.
- the on-load tap changer 30 includes a change-over switch 31, a tap selector 32, and a converter 33, and is incorporated in the transformer 50.
- the on-load tap changer 30 is operated by the operation mechanism 35, and the on-load tap changer 30 and the motor 36 provided in the operation mechanism 35 are connected by a drive shaft 34.
- the drive shaft 34 is equipped with torque detecting means 80 for detecting the drive torque during operation.
- the torque detecting means 80 for detecting the torque of the drive shaft 34 can be realized relatively inexpensively and easily even when a switching operation monitoring device is added to the existing load tap changer.
- a separate type consisting of a rotating part 41 and a fixed part 42 is adopted, and its configuration will be described below.
- a rotating part 41 attached to the drive shaft 34 and rotating with the rotation of the drive shaft 34 is provided with a Tonlek sensor that is attached to the outer periphery of the rotating drive shaft 34 and detects the drive shaft torque, and a first transmission / reception means. It has a built-in battery that drives them.
- the fixed portion 42 fixed inside the operation mechanism 35 includes, for example, a second transmission / reception unit that transmits and receives signals to and from the first transmission / reception unit of the rotation unit 41 wirelessly using an infrared signal or the like. It is equipped with. In addition, illustration of the internal structure of the rotation part 41 and the fixed part 42 is omitted.
- the switching command signal of the on-load tap changer is transmitted from the second transmission / reception means of the fixed part 42 and received by the first transmission / reception means of the rotating part 41, so that the battery power is supplied and the torque sensor detects.
- the detected data is transmitted by the first transmission / reception means of the rotation unit 41, received by the second transmission / reception means of the fixed unit 42, and sent to the tonrec waveform data recording means 45 described later.
- the separation type tonolec detection means 80 can be configured simply and inexpensively, and the consumption of the battery built in the rotating part 41 is minimized, so that it exhibits sufficient practicality. It is.
- transmission of the detected torque data to the fixed part 42 is started by the circumferential position of the rotating part 41 on the drive shaft 34 when the torque detection start signal is transmitted from the fixed part 42 in response to the switching command signal. Will be delayed. That is, there is a drawback that the switching start time in the torque waveform data, which is a problem in the present invention, cannot be grasped with sufficient accuracy. Specifically, for example, the delay is about 200 ms at the maximum.
- the present invention is a force that can reliably detect torque data associated with the switching operation of the switching switch. Returning to the explanation of the configuration and operation of the on-load tap changer and its switching operation monitoring device.
- the switching operation monitoring device 40 takes in the torque waveform data detected by the torque sensor of the rotating unit 41 as a voltage level signal at a sampling frequency of a predetermined frequency, and transmits the voltage level signal as a digital signal.
- the signal is received by the fixed unit 42 and input to the signal processing unit 43 which is the main part of the operation monitoring device, and the switching operation of the on-load tap changer 30 is monitored.
- FIG. 2 shows a circuit configuration of a general load tap changer 30.
- the transformer 50 is composed of a main feeder wire 51a, a coarse tap feeder wire 51b, and a dense tap feeder wire 51c.
- the on-load tap changer 30, the switch selector 31, the tap selector 32, and the converter 33 are shown in the figure. Connected to the street.
- the switching switch 31 is actually provided with a current limiting resistor and a contact point that contacts and disconnects during switching, but this portion is omitted.
- Figure 3 shows the relationship between the tap position of the on-load tap changer and the input state of each component.
- the state shown in FIG. 2 shows a state in which the on-load tap changer 30 stops at the tap position 5 after finishing the switching from the tap position 4 to the tap position 5 in the upward direction.
- the odd side of tap selector 32 is tap 5
- the even side is tap 4
- converter 33 is tap +
- switch 31 is odd.
- Main wire 51 a ⁇ Coarse tap wire 5 lb ⁇ Coarse tap wire 5 lb tap + ⁇ Converter 33 ⁇ Fine tap wire 51 pcs ⁇ Fine tap wire 51 c Tap
- the current path is formed along the path of 5 ⁇ odd side of tap selector 32 ⁇ switching switch 31.
- the converter 33 does not operate in any of the above-described switching (hereinafter, switching in which the converter 33 does not operate is referred to as normal tap switching). As shown in Fig. 3, the converter 33 operates only when switching from the tap position 10 to the tap position 11 in the upward switching and from the tap position 10 to the tap position 9 in the downward switching. (Hereinafter, switching in which the converter 33 operates is referred to as switching tap switching).
- the operation of the on-load tap changer 30 can be summarized according to the operation state of each component. There are 6 types of operations involving the operation of 2 in the case of up / down switching, respectively, in the case of operation involving the operation of the tap selector 32 and the converter 33, respectively in the case of up / down switching. Identified.
- FIG. 5 shows a block diagram of the switching operation monitoring device for the on-load tap changer operating as described above.
- the switching operation monitoring device 40 that monitors the switching operation of the on-load tap changer 30 includes a rotating unit 41 that is mounted on the drive shaft 34 and includes a torque sensor, and a fixed unit 42 that receives detection data from the torque sensor by radio signals. And a signal processing unit 43.
- the signal processing unit 43 is in the process of switching the operation mode identification means 44 for identifying the operation mode of the switching operation of the on-load tap changer 30 and the on-load tap changer 30 detected by the torque detection means 80.
- Tonerec waveform data recording means 45 for identifying and recording the tonrecque waveform data of each operation mode by the operation mode identification means 44 and the monitoring target specific data for each operation mode of the on-load tap changer 30 are set, and the reference Value and allowable fluctuation range
- the reference data setting means 46 for presetting and storing the torque waveform data recorded in the torque waveform data recording means 45 will be described in detail later with reference to FIGS.
- the specific data extraction means 48 for extracting the data to be processed as specific data, and the specific data extracted by the specific data extraction means 48 and the reference value set by the reference data setting means 46 are compared to determine the allowable fluctuation range.
- the rotating portion 41 of the torque detecting means 80 is mounted on the rotating drive shaft 34, and the detected torque signal cannot be captured by wire.
- the detected data is transmitted as a radio signal converted into a digital signal at a predetermined cycle, for example, a sampling cycle of several hundred Hz, received by the fixing unit 42, and taken into the signal processing unit 43 as torque waveform data.
- the switching operation of the on-load tap switch 30 from the tap switching signal OS and the tap position signal PS from the operation mechanism 35 is switched every time switching is performed.
- the up / down switching respectively, the operation accompanied by the operation of the tap selector 32
- the up / down switching respectively, in the operation involving the operation of the tap selector 32 and the converter 33.
- the six types of operation modes shown in Fig. 4 are identified.
- the torque waveform data recording means 45 records the torque waveform data detected by the torque detection means 80 and identified by the operation mode identification means 44 for each operation mode.
- the reference data setting means 46 as the monitoring target specifying data, the operating torque values of the tap selector 32, the converter 33, and the switching switch 31, the time difference of the operating time with respect to the reference operating time, and the switching switching
- the reference value of the reference torque value at the switching operation end time of the device 31 is set, and an allowable fluctuation range of each reference value, for example, a value such as ⁇ 25% or ⁇ 50% is preset and stored.
- FIGS. 6 is a block diagram showing the internal configuration of the waveform processing means 47, and FIG. It is a figure which shows the waveform of each waveform process of torque waveform data.
- This waveform processing means 47 was created by paying attention to the abrupt torque reduction characteristics of the switching switch 31 that operates in all six switching modes shown in FIG. 4, especially during the switching operation. That is, this switching operation is realized by releasing the energy storing mechanism of the switching switch at once from the state where the energy is stored to the maximum. In this process, the torque generated on the drive shaft 34 decreases rapidly from the maximum value in the stored state toward the minimum value in the released state, but in the process, the time change of the torque, that is, the torque It pays attention to the time when the time differential value becomes maximum.
- the torque waveform data obtained from the torque detecting means 80 is switched to the switching operation of the switching switch 31 so that the time at which the maximum value of the torque differential value is generated can be detected with a wide observation time range as much as possible.
- Torque waveform shaping that minimizes the generation of local maximum values that can occur in the vicinity of the time when the local maximum occurs, by processing with a low-pass filter that has the lowest possible cut-off frequency in the range where the torque change associated with The present invention has been completed, in which data is created and the time at which the maximum value of the torque differential value is generated based on the torque waveform shaping data, that is, the operation reference time is accurately detected.
- torque waveform data from the torque waveform data recording means 45 is processed by the third low-pass filter 70, and torque waveform processing data from which noise components generated at the time of torque detection are removed is sent to the specific data extraction means 48. Is done.
- the third low-pass filter 70 constitutes a noise elimination circuit, and performs an Fourier transform process on the original waveform of the monitored torque waveform data recorded in the torque waveform data recording means 45 as a noise elimination process. It is output as torque waveform processing data by filtering with a low-pass filter that extracts the 6Hz (first frequency) component.
- Figure 7 (a) shows the waveform of this torque waveform processing data.
- the first low-pass filter 71 and the second low-pass filter 72 constitute a waveform shaping circuit, and switch the torque waveform processing data from the third low-pass filter 70 on and off.
- Torque waveform shaping data is output by processing with a low-pass filter having a cut-off frequency (second frequency) as low as possible within the range in which the torque change associated with the switching operation of the device 31 remains.
- the cut-off frequency fl of the first low-pass filter 71 is lower than the reference frequency f by a predetermined frequency width A f when the frequency at which the standard switching operation time of the switching switch 31 is 1 ⁇ 2 cycle is the reference frequency f. Further, the cutoff frequency f 2 of the second low-pass filter 72 is set to a value that is higher than the reference frequency by a predetermined frequency width ⁇ f.
- the first low-pass filter 71 has a third low-pass filter for the purpose of removing noise components.
- a f 2.0 Functions as a low-pass filter with a cut-off frequency of 2.0Hz
- the first torque waveform shaping data is output by removing the frequency components that exceed it.
- Fig. 7 (b) shows the waveform of the first torque waveform shaping data.
- the second low-pass filter 72 functions as a low-pass filter having a cutoff frequency of ⁇ , which is lower than the cutoff frequency 6 Hz of the third low-pass filter 70, and removes frequency components exceeding it. Then, the second torque waveform shaping data is output.
- Fig. 7 (c) shows the waveform of the second torque waveform shaping data.
- the first differentiator 73 and the second differentiator 74 are respectively the first torque waveform shaping data from the first low-pass filter 71 and the second torque waveform shaping from the second low-pass filter 72. This is used to calculate the time derivative of the data and is provided to determine the maximum point of torque change during the switching operation of the switching switch 31.
- Multiplier 75 calculates the product of the output of first differentiator 73 and the output of second differentiator 74, and On the time differential characteristics of the Luke waveform shaping data, the maximum point of the torque change is remarkably displayed with a positive polarity.
- Figure 7 (d) shows the product waveform from this multiplier 75.
- the maximum value extraction circuit 76 searches for the maximum value in a predetermined observation time range on the product waveform from the multiplier 75, extracts it as the operation reference time tp, and sends it to the specific data extraction means 48.
- the first and second differentiators 73 and 74, the multiplier 75, and the maximum value extraction circuit 76 described above constitute the operation reference time extraction means of claim 1 of the present application.
- Fig. 7 (a) torque waveform processing data in which only noise components are removed from the torque waveform data, and the waveform shaping circuits 71 and 72, differentiators 73 and 74, and multiplications are further added to the torque waveform processing data.
- the product waveform shown in Fig. 7 (d) which has been processed by the waveform generator 75, is compared, the latter shows a waveform that shows a prominent peak value in the portion where the torque change is large, and is around the peak time. Then you can see that the level is getting lower.
- the reference frequency f is the cutoff frequency fl
- the reference frequency beam has a predetermined frequency width A f lower value.
- the first low-pass filter 71 and the second low-pass filter 72 in which the cutoff frequency f2 is set to a value that is a predetermined frequency width ⁇ f higher than the reference frequency are included in the application of the present invention.
- the present invention is not limited to this configuration.
- the specific data extraction means 48 corresponds to the monitoring target specific data for each operation mode set in the reference data setting means 46 from the torque waveform processing data processed by the waveform processing means 47 and the data of the reference operation time. Extract data as specific data.
- the local maximum occurrence time (tp _td) immediately before the quasi-time tp is used as the operation start time of the switching switch 31 and the local minimum occurrence time (tp + to) immediately after the operation reference time tp is terminated. Specify time. Then, the operation time of the switching switch 31 that is the time width (td + to) between the operation start time and the operation end time is extracted as characteristic data.
- the torque value ( ⁇ ⁇ ) at the operation end time (tp + to) of the torque waveform processing data is identified as the reference torque value, and the torque value ( ⁇ ⁇ ) and the reference torque value () at the operation start time (tp_td) are determined.
- the torque ( ⁇ ⁇ - ⁇ ) during operation of the switchgear 31 that is the difference from ⁇ ) is extracted as characteristic data.
- the end time of the switching switch 31 is not limited to the tap selector 32 or the converter 33 other than the force switching switch 31 that uses the torque value at the operation end time of the switching switch 31 as a reference torque value.
- the torque at each operation may be obtained using the torque reference value specified from the torque value at as the torque reference value.
- the specific data extracted from the torque waveform processing data and the reference operation time by the specific data extraction unit 48, and the monitoring target specification data corresponding to the operation mode set in the reference data setting unit 46 When the difference does not exceed the allowable fluctuation range, it is determined as normal operation, and when it exceeds the allowable fluctuation range, it is determined as abnormal operation, and the determination result is output.
- the operation reference time is extracted from the time indicating the peak of the product waveform in each operation time zone.
- the operation time and operation torque of the tap selector 32 and converter 33 are extracted as characteristic data from the torque waveform processing data and the operation reference time, and compared with the corresponding reference values to determine the operation abnormality. It can be carried out.
- each reference value set by the reference data setting means 46 in FIG. A description will be given of what realizes more appropriate switching operation monitoring by correcting the fluctuation range values taking into account the changes over time associated with the operation results of the on-load tap changer. The following description will focus on the differences from the first embodiment.
- FIG. 8 is a block diagram showing a switching operation monitoring device for the on-load tap changer according to the second embodiment of the present invention.
- a specific data storage unit 61 and a specific data management value calculation unit 62 are added to the signal processing unit 43 described in FIG. 5, and a reference data setting unit 63 is provided.
- a reference data setting unit 63 is provided.
- the specific data extraction means 48 extracts, as specific data, data corresponding to the monitoring target specific data for each operation mode set in the reference data setting means 63 from the torque waveform processing data processed by the waveform processing means 47. Then, the data is output to the abnormality determining means 49 and stored as accumulated data in the specific data accumulating means 61 described below.
- Fig. 9 is a list of detection items corresponding to each operation mode, and the part indicated by ⁇ is the extraction item of specific data.
- FIG. 10 shows an example of the upward switching of the conversion tap switching of the torque waveform processing data processed by the waveform processing means 47. The procedure for extracting each extraction item of the specific data shown in FIG. 9 from the torque waveform processing data will be described.
- the torque waveform processing data extracted by the specific data extraction unit 48 is compared with the reference value of the monitoring target specific data corresponding to the operation mode set in the reference data setting unit 63. If the difference does not exceed the allowable fluctuation range, it is determined as normal operation. If the difference exceeds the allowable fluctuation range, it is determined as abnormal operation, and the determination result is output.
- the specific data accumulating unit 61 accumulates the specific data from the specific data extracting unit 48 in a time series for each operation mode and monitoring target.
- the specific data management value calculation means 62 performs statistical processing for each operation mode and extraction item when the number of data stored in the specific data storage means 61 reaches a preset number of data, and calculates an average value, Standard deviation is calculated.
- a reference value and a management value of the allowable fluctuation range are set for each specific data, and the management value of the reference data setting unit 63 is updated.
- the management value of the reference data setting unit 63 is updated every time a predetermined number of data is accumulated, but may be performed every elapse of a predetermined operation period.
- the on-load tap changer 30 accumulates the update history of the management value of the reference data setting means 63, although the operation time of the portion where the changeover frequency of the change-over switch 31 is high changes due to electrode consumption. If this is done, it is possible to diagnose the aged deterioration state of the on-load tap changer 30.
- Embodiment 2 of the present invention every time a predetermined number of performance data is accumulated, the driving torque of the on-load tap changer 30 changes with time. Since the management value of the monitoring target specific data is automatically updated, the torque waveform data is accumulated for updating the management value and the data collection for updating the setting value of the management value is performed as before. There is no need to update the management value, and the running cost can be reduced.
- the standard switching operation time of the switching switch is set to 1/2 turn.
- the frequency to be used as the reference frequency is the reference frequency
- the waveform shaping circuit includes a first low-pass filter that removes frequency components exceeding a predetermined frequency width lower than the reference frequency from the torque waveform processing data, and a frequency exceeding a frequency higher than the reference frequency by a predetermined frequency width. It consists of a second low-pass filter that removes components,
- the operation reference time extraction means includes a first micro-differentiator that differentiates the output from the first low-pass filter, a second differentiator that differentiates the output from the second low-pass filter, and outputs from both differentiators. And a local maximum extraction circuit that extracts the time of occurrence of the local maximum value in the predetermined time range of the product waveform of the multiplier force as the operation reference time. The time can be detected accurately.
- the cut-off frequency of the first low-pass filter is 0.5 to 1 Hz lower than the reference frequency
- the cut-off frequency of the second low-pass filter is 0.5 to: Since the frequency is 1 Hz higher, the operation reference time can be detected accurately and reliably.
- the specific data extraction means switches the maximum value generation time immediately before the operation reference time in the torque waveform processing data, and switches the operation start time of the switch and the minimum value generation time immediately after the operation reference time. Since the operation time of the switching switch, which is the time width between the operation start time and the operation end time, is extracted as characteristic data, it is identified as the operation end time of the switch. You can be sure.
- the specific data extracting means specifies the torque value at the operation end time of the torque waveform processing data as a reference torque value, and is a difference between the torque value at the operation start time and the reference torque value. Since the operating torque is extracted as characteristic data, it is possible to ascertain whether or not there is an abnormality in the operating torque during the operation of the switching switch.
- the torque detection means is attached to the outer periphery of the rotating drive shaft, and includes a torque sensor for detecting the drive shaft torque and a first transmission / reception means, and a first transmission / reception means wirelessly. And a fixed part having a second transmission / reception means for transmitting / receiving a signal to / from, and a switching command signal of a load tap changer force is transmitted from the second transmission / reception means of the fixed part, and The torque sensor starts detecting operation when received by the first transmission / reception means, and the detection data is transmitted from the first transmission / reception means of the rotating part to send the second transmission / reception means of the fixed part. Since it is received at the stage and sent to the torque waveform data recording means, the torque detecting means can be realized simply and inexpensively, and it can be easily attached to existing products.
- specific data storage means for storing each specific data extracted by the specific data extraction means for each operation mode, and whenever a predetermined amount of specific data is stored in the specific data storage means, the specific data is stored.
- Specific data is extracted for each operation mode and monitoring target specific data, statistical processing is performed, and the reference value and allowable fluctuation range management value for each monitoring target specific data are calculated and set in the reference data setting means. Since it is provided with a specific data management value calculation means for updating the reference value and the management value of the allowable fluctuation range, it is possible to more appropriately monitor the switching operation in consideration of the operation results.
- the reference value set in the reference data setting means by the specific data management value calculation means and the management value of the fluctuation allowable range are updated every time the accumulated data reaches the preset number of data. Is smoothly and reliably performed.
- the reference value before the update and the fluctuation tolerance management value are stored, and the reference value and the fluctuation tolerance are stored. Since the history of the management value of the width is stored for a predetermined period, it is possible to diagnose the aged deterioration state of the on-load tap changer.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007528228A JP4680261B2 (ja) | 2005-05-09 | 2006-04-27 | 負荷時タップ切換器の切換動作監視装置 |
EP20060732412 EP1884965B1 (en) | 2005-05-09 | 2006-04-27 | Change action monitoring device for on-load tap changers |
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JP2005-135878 | 2005-05-09 | ||
JP2005135878 | 2005-05-09 | ||
JP2005-139456 | 2005-05-12 | ||
JP2005139456 | 2005-05-12 |
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WO2006120919A1 true WO2006120919A1 (ja) | 2006-11-16 |
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PCT/JP2006/308856 WO2006120919A1 (ja) | 2005-05-09 | 2006-04-27 | 負荷時タップ切換器の切換動作監視装置 |
Country Status (4)
Country | Link |
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US (1) | US7724152B2 (ja) |
EP (1) | EP1884965B1 (ja) |
JP (1) | JP4680261B2 (ja) |
WO (1) | WO2006120919A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008130957A (ja) * | 2006-11-24 | 2008-06-05 | Mitsubishi Electric Corp | 負荷時タップ切換器のタップ位置及び累積動作回数検出方法 |
KR20150003207A (ko) * | 2012-04-27 | 2015-01-08 | 마쉬넨파브릭 레인하우센 게엠베하 | 부하시 탭 절환기에서의 전압을 평균화하는 방법 |
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DE102010033195B3 (de) * | 2010-08-03 | 2011-11-10 | Maschinenfabrik Reinhausen Gmbh | Verfahren zur Überwachung eines Stufenschalters |
BR112014021669B1 (pt) * | 2012-03-01 | 2021-09-28 | Cooper Technologies Company | Método e sistema para operação de múltiplas fases de desvio máximo, método de correção de fator de potência otimizada, método de equilíbrio de ângulo de fase e método de equilíbrio de delta de tensão |
DE102012103736A1 (de) * | 2012-04-27 | 2013-10-31 | Maschinenfabrik Reinhausen Gmbh | Verfahren zur Funktionsüberwachung eines Stufenschalters |
CN107870278B (zh) * | 2017-11-21 | 2024-04-30 | 国网浙江省电力公司宁波供电公司 | 一种基于紫蜂的变压器试验模拟系统 |
DE102019112715B3 (de) * | 2019-05-15 | 2020-10-01 | Maschinenfabrik Reinhausen Gmbh | Verfahren zum Durchführen einer Umschaltung eines Laststufenschalters mittels eines Antriebssystems und Antriebssystem für einen Laststufenschalter |
CN110726550B (zh) * | 2019-11-11 | 2021-11-16 | 国网河南省电力公司南阳供电公司 | 一种变压器oltc传动轴智能监测系统及方法 |
CN112327151B (zh) * | 2020-10-26 | 2022-05-06 | 南方电网科学研究院有限责任公司 | 一种有载分接开关切换状态的监测方法、装置及终端设备 |
DE102021122813B4 (de) | 2021-09-03 | 2024-03-07 | Maschinenfabrik Reinhausen Gmbh | Vorrichtung und Verfahren zur Überwachung eines Laststufenschalters |
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JPH04137511A (ja) | 1990-09-27 | 1992-05-12 | Mitsubishi Electric Corp | 負荷時タップ切換装置の異常検出装置 |
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JPS60124810A (ja) * | 1983-12-08 | 1985-07-03 | Mitsubishi Electric Corp | 負荷タップ選択器 |
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JPS60176213A (ja) * | 1984-02-23 | 1985-09-10 | Toshiba Corp | 負荷時タップ切換装置 |
JP2702357B2 (ja) * | 1992-06-24 | 1998-01-21 | 株式会社日立製作所 | 負荷時タップ切換器の異常診断システム |
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- 2006-04-27 JP JP2007528228A patent/JP4680261B2/ja not_active Expired - Fee Related
- 2006-04-27 WO PCT/JP2006/308856 patent/WO2006120919A1/ja active Application Filing
- 2006-04-27 US US11/793,813 patent/US7724152B2/en not_active Expired - Fee Related
- 2006-04-27 EP EP20060732412 patent/EP1884965B1/en not_active Expired - Fee Related
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JPS6362309A (ja) * | 1986-09-03 | 1988-03-18 | Nissin Electric Co Ltd | タツプ切換器の監視装置 |
JPH04137511A (ja) | 1990-09-27 | 1992-05-12 | Mitsubishi Electric Corp | 負荷時タップ切換装置の異常検出装置 |
JPH07161551A (ja) * | 1993-12-03 | 1995-06-23 | Mitsubishi Electric Corp | 負荷時タップ切換動作監視装置 |
JP3189542B2 (ja) | 1993-12-03 | 2001-07-16 | 三菱電機株式会社 | 負荷時タップ切換動作監視装置 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008130957A (ja) * | 2006-11-24 | 2008-06-05 | Mitsubishi Electric Corp | 負荷時タップ切換器のタップ位置及び累積動作回数検出方法 |
KR20150003207A (ko) * | 2012-04-27 | 2015-01-08 | 마쉬넨파브릭 레인하우센 게엠베하 | 부하시 탭 절환기에서의 전압을 평균화하는 방법 |
JP2015519737A (ja) * | 2012-04-27 | 2015-07-09 | マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 負荷タップ切換器の基準設定方法 |
KR102038429B1 (ko) | 2012-04-27 | 2019-10-30 | 마쉬넨파브릭 레인하우센 게엠베하 | 부하시 탭 절환기의 사전에 정해진 작동 설정을 결정하는 방법 |
Also Published As
Publication number | Publication date |
---|---|
EP1884965A1 (en) | 2008-02-06 |
EP1884965A4 (en) | 2011-10-19 |
US20080129524A1 (en) | 2008-06-05 |
EP1884965B1 (en) | 2014-12-24 |
JPWO2006120919A1 (ja) | 2008-12-18 |
US7724152B2 (en) | 2010-05-25 |
JP4680261B2 (ja) | 2011-05-11 |
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