JP2011096440A - Device and method for measuring electrode opening/closing time of power switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for measuring electrode opening/closing time for accurately measuring the electrode opening time and electrode closing time of a power switchgear. <P>SOLUTION: A magnetic sensor 102 sends a magnetic sensor output signal Ss1 indicating the position of a movable contact 203 relative to the axial direction of a contact-side movable shaft 204 of the power switchgear 200 opening and closing power using a fixed contact 202 and the movable contact 203 to the power switchgear 200, a sensor signal measuring unit 103 measures and stores the magnetic sensor output signal Ss1 as a time sequential signal Ssq1 with the input time of a measurement control command signal Sc as a starting point, and an electrode opening/closing time measuring unit 104 detects a time at which an electrode opening point or an electrode closing point of the power switchgear 200 is reached by detecting an inflection point or peak point appearing in the time sequential signal Ssq1 at the electrode opening point or electrode closing point, and measures the electrode opening time from the starting point to a time when the electrode opening point is reached, or the electrode closing time from the starting point to a time when the electrode closing point is reached. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an opening / closing pole time measuring device and method for measuring the opening time and closing time of a power switching device that opens and closes power by a fixed contact and a movable contact.

  For example, Patent Document 1 proposes a switching electrode time measuring device according to the prior art for measuring the opening time and closing time of a power switching device. The switching time measuring device according to the prior art proposed in Patent Document 1 is a power switching device in which a movable contact is connected to a movable iron core via a contact pressure spring and a spring receiver, and a current of a coil that drives the movable core. Is measured with a current measuring instrument, and is opened and closed based on the inflection point of the coil current that appears when the driving force of the movable iron core changes via the contact pressure spring at the moment when the movable contact and fixed contact are separated or contacted. Seeking extreme time.

International Publication No. 2005/111164.

  However, in the open / close pole time measuring device according to the prior art, since the movable contact and the movable iron core are connected via the contact pressure spring, the inflection point does not appear clearly in the waveform of the coil current, and the opening time In addition, the closing time may not be obtained accurately.

  An object of the present invention is to solve the above problems and to provide a switching pole time measuring apparatus and method capable of accurately measuring the opening time and the closing time as compared with the prior art.

An opening / closing pole time measuring device according to the present invention is an opening / closing pole time measuring device for measuring an opening time and a closing time of a power switching device that opens and closes power by a fixed contact and a movable contact.
Sensor means for generating and outputting a sensor output signal indicating the position of the movable contact with respect to the axial direction of the movable contact side movable shaft (hereinafter referred to as the contact side) of the power switching device;
Sensor signal measuring means for measuring and storing the sensor output signal as a time series signal starting from the input time of the measurement control command signal or the rise time of the coil current of the power switchgear,
By detecting an inflection point or peak point appearing in the time series signal at the opening point or closing point of the power switchgear, the time when the opening point or the closing point is reached is detected, and the opening point is determined from the starting point. And an opening / closing pole time measuring means for measuring a closing time from the starting point to a time when the closing point is reached.

  Therefore, according to the present invention, the sensor means is arranged so as to measure the position or acceleration of the movable contact with respect to the axial direction of the contact-side movable shaft, and the time when the movable contact and the fixed contact are separated or contacted by the sensor means. Since it detects as an inflection point or a peak point in the output signal, the opening time and closing time of the power switchgear can be accurately obtained.

FIG. 2 is a block diagram and a side view showing the configuration of the opening / closing extreme time measuring apparatus 100 according to Embodiment 1 of the present invention, and a side view showing the configuration and operation of the power switching apparatus 200. 3 is a timing chart showing a relationship between a magnetic sensor output signal Ss1 when the power switch 200 in FIG. 1 is closed, a contact state of the power switch 200, and a measurement control command signal Sc. 2 is a timing chart showing the relationship between a magnetic sensor output signal Ss1 when the power switchgear 200 of FIG. 1 opens, the contact state of the power switchgear 200, and a measurement control command signal Sc. It is a side view which shows a part of switching | closing pole time measuring apparatus 100 and the electric power switching apparatus 200 which concern on Embodiment 2 of this invention. It is a side view which shows a part of switching switching time measuring device 100 and power switching device 200 according to Embodiment 3 of the present invention. It is the block diagram and side view which show the structure of the switching time measuring apparatus 100c which concerns on Embodiment 4 of this invention, a side view, and the side view which shows the structure of the electric power switch apparatus 200. It is a timing chart which shows the relationship between the acceleration sensor output signal Ss2 when the power switchgear 200 of FIG. 6 is closed, the contact state of the power switchgear 200, and the measurement control command signal Sc. 7 is a timing chart showing a relationship between an acceleration sensor output signal Ss2 when the power switching device 200 of FIG. 6 opens, a contact state of the power switching device 200, and a measurement control command signal Sc.

Embodiment 1 FIG.
FIG. 1 is a block diagram and a side view showing the configuration of the switching time measuring apparatus 100 according to Embodiment 1 of the present invention, and a side view showing the configuration and operation of the power switching apparatus 200.

  In FIG. 1, the power switch 200 includes a vacuum valve 201, a fixed contact 202, a movable contact 203, a contact side movable shaft 204, a contact side spring receiver 205, a contact pressure spring 206, and a coil side spring receiver 207. A coil side movable shaft 208, a movable iron core 209, a closing coil 210, and an opening coil 211. A high voltage is applied from a high voltage source (not shown) between the fixed contact 202 and the movable contact 203 in the vacuum valve 201, and the fixed contact 202 and the movable contact 203 are separated at a predetermined interval. Open / close control is performed from the open state to the closed state. The movable contact 203 is connected to the coil-side movable shaft 208 via a contact-side movable shaft 204, a contact-side spring receiver 205, a contact pressure spring 206, and a coil-side spring receiver 207. Further, the coil side movable shaft 208 is connected to the movable iron core 209, and the movable iron core 209 moves leftward by exciting the closing coil 210 or the opening coil 211 from an excitation voltage source (not shown). Or move to the right.

  The power switching device 200 performs a closing operation or an opening operation in response to an opening / closing control command signal (not shown). In the closing operation, in the opened state of FIG. 1A, the closing coil 210 is excited, the movable iron core 209 moves to the left, and is connected to the coil side movable shaft 208 via the contact pressure spring 206. The contact-side movable shaft 204 that has been moved also moves to the left and enters the state shown in FIG. 1B. The movable contact 203 comes into contact with the fixed contact 202, and this state is referred to as a closing point. Note that the contact pressure spring 206 is not compressed at the closing point. Thereafter, the movable iron core 209 further moves to the left in the excited state, and the contact pressure spring 206 is compressed, so that the closed state shown in FIG. 1C is obtained, and the closing operation is completed. In the operation from the closing point to the closing state, only the contact pressure spring 206 is compressed, and the contact side movable shaft 204 does not move. Here, the time from the start of the closing operation to the closing point is referred to as “closing time”.

  On the other hand, in the opening operation, the opening coil 211 is excited in the closed state of FIG. 1C, the movable iron core 209 moves to the right, and the contact pressure spring 206 is extended. At this time, the contact-side movable shaft 204 does not move. When the contact pressure spring 206 is extended to the maximum extent, the state shown in FIG. 1B is obtained, and the movable contact 203 and the fixed contact 202 are separated, and this state is referred to as an opening point. After that, the contact-side movable shaft 204 moves to the right, and the contact opening state is completed as shown in FIG. Here, the time from the start of the opening operation to the opening point is referred to as “opening time”.

  Next, the configuration and operation of the open / close extreme time measuring apparatus 100 will be described. The switching time measurement apparatus 100 includes a magnet 101, a magnetic sensor 102, a sensor signal measurement device 103, and a switching time measurement device 104. The magnet 101 is disposed at a position that moves together with the contact-side movable shaft 204 such as the contact-side spring receiver 205. On the other hand, the magnetic sensor 102 has a power switchgear so as to face the magnetic sensor 102 in a portion whose position does not change even when the contact-side movable shaft 204 such as the outer surface of the vacuum valve 201 moves (hereinafter referred to as a fixed portion). When 200 is in a closed state, it is arranged to have a predetermined distance, for example, a distance of about several mm to 10 mm. The magnetic sensor 102 is a general sensor such as a linear Hall sensor, for example. The magnetic sensor 102 measures the magnetic flux density from the magnet 101 and changes according to the distance from the magnet 101, and outputs a magnetic sensor output signal representing the magnetic flux density. Ss1 is output to the sensor signal measuring device 103. Since the signal level of the magnetic sensor output signal Ss1 changes according to the distance between the magnet 101 and the magnetic sensor 102, the position of the magnet 101 relative to the axial direction of the contact-side movable shaft 204 with respect to the magnetic sensor 102, that is, fixed. The position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 with respect to the contact 202 is shown.

  The sensor signal measuring device 103 includes a processor 103p and a memory 103m, and starts from the time when the measurement control command signal Sc generated at the same timing as the opening / closing control command signal input to the power switching device 200 is received. The magnetic sensor output signal Ss1 is A / D converted and measured for a predetermined time, and stored in the memory 103m. Then, the magnetic sensor output signal Ss1 is read from the memory 103m and output to the open / close pole time measuring device 104 as the time series signal Ssq1. To do. In the present embodiment, the magnetic sensor output signal Ss1 is measured starting from the measurement control command signal Sc. However, the present invention is not limited to this, and a current is supplied to the closing coil 210 or the opening coil 211. The magnetic sensor output signal Ss1 may be measured starting from the current signal Si indicating that it has flowed.

  The switching pole time measuring device 104 includes a processor 104p and a memory 104m, measures the opening time and the closing time based on the time series signal Ssq1 from the sensor signal measuring device 103, and opens the opening time data Do. And the closing time data Dc are output to an external device (not shown). Based on the measured opening time and closing time, the state of the power switchgear and the switching pole phase control are performed. Here, the measuring method of the said opening time and closing time is demonstrated below.

  FIG. 2 is a timing chart showing the relationship between the magnetic sensor output signal Ss1, the contact state of the power switch 200, and the measurement control command signal Sc when the power switch 200 of FIG. 1 is closed. At time t1, the power switch 200 is in an open state (FIG. 1A), the measurement control command signal Sc changes from the L level to the H level, and the power switch 200 starts a closing operation. Next, at time t2, the power switching device 200 reaches the closing point (FIG. 1B), and at time t3, the power switching device 200 reaches the closing state (FIG. 1C). Here, the magnetic sensor output signal Ss1 is stored in the memory 103m for a predetermined time from the time t1, and the sensor signal measuring device 103 reads the magnetic sensor output signal Ss1 from the memory 103m and measures the switching pole time as the time series signal Ssq1. Output to the device 104.

  Next, with reference to FIG. 2, a method for measuring the closing time performed by the opening / closing pole time measuring device 104 will be described. At the time of starting the closing operation (time t1), the distance between the magnet 101 and the magnetic sensor 102 is longer than the distance in the closing state, and the measured magnetic flux density, that is, the signal level of the time series signal Ssq1 is closed. Small compared to the signal level in the pole state. As the contact-side movable shaft 204 moves leftward and the distance between the magnet 101 and the magnetic sensor 102 becomes shorter, the signal level of the time-series signal Ssq1 increases. Thereafter, when the closing point (time t2) is reached, the contact-side movable shaft 204 stops, and the distance between the magnet 101 and the magnetic sensor 102 is constant until the closing state (time t3) is reached. The signal level of Ssq1 is a constant value. At the closing point (time t2), the contact-side movable shaft 204 suddenly stops, so that a clear inflection point P1 appears in the time series signal Ssq1. In addition, since transient vibration occurs due to the sudden stop of the contact-side movable shaft 204, the peak point P1 may appear in the time series signal Ssq1. Therefore, if the inflection point or peak point P1 of the time series signal Ssq1 is detected, the time t2 when the power switching device 200 reaches the closing point can be detected, and the time t1 that is the starting point of the time series signal Ssq1 and the time t2 are detected. By obtaining the difference, the closing time tc1 can be measured.

  FIG. 3 is a timing chart showing the relationship between the magnetic sensor output signal Ss1 when the power switching device 200 of FIG. 1 opens, the contact state of the power switching device 200, and the measurement control command signal Sc. At time t4, the power switching device 200 is in a closed state (FIG. 1C), the measurement control command signal Sc changes from the L level to the H level, and the power switching device 200 starts the opening operation. Next, at time t5, the power switching device 200 reaches the opening point (FIG. 1B), and further, at time t6, the power switching device 200 reaches the opening state (FIG. 1C). Here, the magnetic sensor output signal Ss1 is stored in the memory 103m for a predetermined time from the time t4, and the sensor signal measuring device 103 reads the magnetic sensor output signal Ss1 from the memory 103m and measures the switching pole time as the time series signal Ssq1. Output to the device 104.

  Next, with reference to FIG. 3, the measuring method of the opening time performed by the switching pole time measuring device 104 will be described. Since the contact-side movable shaft 204 is stopped until the opening point (time t5) is reached from the time when the opening operation is started (time t4), the distance between the magnet 101 and the magnetic sensor 102 is constant. The signal level of the time series signal Ssq1 is a constant value. The contact-side movable shaft 204 moves rightward from the opening point (time t5) until reaching the opening state (time t6), and as the distance between the magnet 101 and the magnetic sensor 102 increases, the signal of the time series signal Ssq1 The level goes down. At the opening point (time t5), since the contact-side movable shaft 204 starts moving, a clear inflection point P2 appears in the time series signal Ssq1. Further, since the transitional vibration is generated by suddenly starting the movement of the contact-side movable shaft 204, the peak point P2 may appear in the time series signal Ssq1. Therefore, if the inflection point or peak point P2 of the time series signal Ssq1 is detected, the time t5 when the power switching device 200 reaches the opening point can be detected, and the time t4 that is the starting point of the time series signal Ssq1 and the time t5 are detected. By obtaining the difference, the opening time to1 can be measured.

  In the first embodiment, the inflection point or peak point P1 of the time series signal Ssq1, or the time t2 when reaching the closing point or the time t5 when reaching the opening point based on the inflection point or peak point P2 is obtained. However, the present invention is not limited to this, (1) the first intersection of the signal level at which the time series signal Ssq1 converges after the closing operation is completed and the time series signal Ssq1, and (2) the signal level of the time series signal Ssq1 is opened. The point at which the signal level of the time series signal Ssq1 before the extreme operation changes by a predetermined threshold or more, (3) the point at which the first minimal signal level appears after the peak point of the time series signal Ssq1 appears, (4) time Based on the peak point of the differential value of the series signal Ssq1 or (5) the peak point of the secondary differential value of the time series signal Ssq1, the time t2 when the open point is reached or the time t5 when the close point is reached may be obtained.

  In Embodiment 1, the magnet 101 and the magnetic sensor 102 are used to measure the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204. However, the present invention is not limited to this, Optical, ultrasonic, and radio wave distance sensors may be used.

  As described above, according to the first embodiment, the opening / closing pole time measuring device 100 for measuring the opening time and the closing time of the power switching device 200 that opens and closes the power by the fixed contact 202 and the movable contact 203. The magnetic sensor 102 and the magnet 101 for generating and outputting the magnetic sensor output signal Ss1 indicating the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 of the power switching device 200, and the input of the measurement control command signal Sc The magnetic sensor output signal Ss1 is measured and stored as the time-series signal Ssq1 with the time or the input time of the current signal Si indicating the rise of the current of the closing coil 210 or the opening coil 211 of the power switching device 200 as a starting point. Inflection appearing in the time-series signal Ssq1 at the opening or closing point of the sensor signal measuring device 103 and the power switch 200 Alternatively, by detecting the peak point P1 or P2, the time at which the opening point or the closing point is reached is detected, and the opening time from the starting point to the time at which the opening point is reached, or from the starting point to the closing point. And an open / close pole time measuring device 104 that measures the closing time until the time reached, and the magnetic sensor 102 is provided so as not to move with the contact-side movable shaft 205 and to move with the contact-side movable shaft 205. The magnetic sensor output signal Ss1 indicating the position of the movable contact 203 is generated by measuring the magnetic flux density from the magnet 101.

  That is, according to the first embodiment, the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 is measured by paying attention to the operation characteristics during the opening / closing operation of the contact-side movable shaft 204 of the power switching device 200. In addition, the magnet 101 and the magnetic sensor 102 are arranged at the same time, and the switching time measuring device 104 is configured to accurately measure the times t2 and t5 when the power switching device 200 reaches the opening point and the closing point. To1 and the closing time tc1 can be accurately measured. Further, since the opening time to1 and the closing time tc1 are measured using a non-contact type sensor, the contact portion is omitted as compared with the contact type sensor, and the opening time to1 and the closing time tc1 are more accurately detected. Can be measured. Further, since the magnetic sensor 102 is attached to the fixed portion and only the magnet 101 is attached to the contact-side movable shaft 204, the magnetic sensor output signal Ss1 can be easily taken out.

Embodiment 2. FIG.
FIG. 4 is a side view showing a part of the switching time measurement apparatus 100 and the power switching apparatus 200 according to Embodiment 2 of the present invention. The second embodiment differs from the first embodiment in the arrangement of the magnet 101a and the magnetic sensor 102a and the configuration of the contact-side spring receiver 205a. The contact-side spring receiver 205a is made of a magnetic metal. The magnet 101a and the magnetic sensor 102a are fixed portions that are opposed to the contact-side spring receiver 205a via the support members 101as and 102as, respectively, and whose positions do not change even if the contact-side movable shaft 204 such as the outer surface of the vacuum valve 201 moves. Placed in. The magnetic sensor 102a measures the magnetic flux density that changes according to the length of the magnetic path M1 from the magnet 101a to the magnetic sensor 102a via the contact-side spring receiver 205a. A magnetic sensor output signal Ss1 indicating the magnetic flux density is output to the sensor signal measuring device 103. When the contact-side movable shaft 204 moves to the left, the magnetic path M1 becomes shorter, and when the contact-side movable shaft 204 moves to the right, the magnetic path M1 becomes longer. Therefore, the length of the magnetic path M1 is movable with the fixed contact 202. The distance varies depending on the distance from the contact 203. Therefore, similarly to the first embodiment, the signal level of the magnetic sensor output signal Ss1 is the distance between the fixed contact 202 and the movable contact 203, that is, the movable contact with respect to the axial direction of the contact-side movable shaft 204 based on the fixed contact 202. The position 203 is shown. Further, since the magnet 101a is attached to the fixed portion in the second embodiment, the impact force applied to the magnet 101a in the opening / closing pole operation is smaller than that in the first embodiment, and the durability of the attachment of the magnet 101a is improved and the magnetic sensor. The reliability of the output signal Ss1 is improved.

  As described above, according to the second embodiment, the opening / closing pole time measuring device 100 for measuring the opening time and closing time of the power switching device 200 that opens and closes the power by the fixed contact 202 and the movable contact 203. The magnetic sensor 102a and the magnet 101a for generating and outputting the magnetic sensor output signal Ss1 indicating the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 of the power switching device 200, and the input of the measurement control command signal Sc The magnetic sensor output signal Ss1 is measured and stored as the time-series signal Ssq1 with the time or the input time of the current signal Si indicating the rise of the current of the closing coil 210 or the opening coil 211 of the power switching device 200 as a starting point. Appearing in the time-series signal Ssq1 at the opening or closing point of the sensor signal measuring device 103 and the power switch 200 The time at which the opening point or the closing point is reached is detected by detecting the bending point or the peak point P1 or P2, and the opening time from the starting point to the time at which the opening point is reached, or the closing point from the starting point to the closing point. And an open / close pole time measuring device 104 for measuring the closing time until the time when the pole is reached. The magnetic sensor 102a and the magnet 101a are opposed to the contact-side spring receiver 205a made of magnetic metal and are contact-side movable shafts. 204, a magnetic sensor output signal indicating the position of the movable contact 203 by measuring the magnetic flux density of the magnetic path from the magnet 101a to the magnetic sensor 102a via the contact-side spring receiver 205a. Ss1 is generated.

  That is, according to the second embodiment, similarly to the first embodiment, the magnetic sensor output signal Ss1 indicating the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 can be obtained. The opening time and the closing time can be measured by measuring the time when the opening point and the closing point are reached. Further, since the magnet 101a and the magnetic sensor 102a are attached to the fixed portion, the impact force applied to the magnet 101a is smaller than that in the first embodiment, and the reliability of the magnetic sensor output signal Ss1 is improved.

Embodiment 3 FIG.
FIG. 5 is a side view showing a part of the switching time measurement apparatus 100 and the power switching apparatus 200 according to Embodiment 3 of the present invention. The third embodiment differs from the second embodiment in the arrangement of the magnet 101b and the magnetic sensor 102b. The magnet 101b and the magnetic sensor 102b face each other so as to sandwich the contact-side spring receiver 205a, and their positions do not change even if the contact-side movable shaft 204 such as the housing inner walls 101bs and 102bs of the power switching device 200 moves. Located in the fixed part. The magnetic sensor 102b measures the magnetic flux density that changes according to the length of the magnetic path M2 from the magnet 101b to the magnetic sensor 102b via the contact-side spring receiver 205a, and outputs a magnetic sensor output signal Ss1 indicating the magnetic flux density. Output to the sensor signal measuring device 103. When the power switch 200 reaches the closing point, the magnetic path M2 is optimally formed, and the magnetic sensor output signal Ss1 becomes the largest. Therefore, similarly to the first embodiment, the signal level of the magnetic sensor output signal Ss1 is the distance between the fixed contact 202 and the movable contact 203, that is, the movable contact with respect to the axial direction of the contact-side movable shaft 204 based on the fixed contact 202. The position 203 is shown. In the third embodiment, since the magnet 101b is attached to the fixed portion, the impact force applied to the magnet 101b in the opening / closing pole operation is smaller than that in the first embodiment, and the durability of the attachment of the magnet 101a is improved and the magnetic sensor. The reliability of the output signal Ss1 is improved.

  As described above, according to the third embodiment, the opening / closing pole time measuring device 100 for measuring the opening time and closing time of the power switching device 200 that opens and closes the power by the fixed contact 202 and the movable contact 203. The magnetic sensor 102b and the magnet 101b for generating and outputting the magnetic sensor output signal Ss1 indicating the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 of the power switching device 200, and the input of the measurement control command signal Sc The magnetic sensor output signal Ss1 is measured and stored as the time-series signal Ssq1 with the time or the input time of the current signal Si indicating the rise of the current of the closing coil 210 or the opening coil 211 of the power switching device 200 as a starting point. Appearing in the time-series signal Ssq1 at the opening or closing point of the sensor signal measuring device 103 and the power switch 200 The time at which the opening point or the closing point is reached is detected by detecting the bending point or the peak point P1 or P2, and the opening time from the starting point to the time at which the opening point is reached, or the closing point from the starting point to the closing point. And an open / close pole time measuring device 104 that measures the closing time until the time when the pole is reached. The magnetic sensor 102b and the magnet 101b face each other so as to sandwich the contact-side spring receiver 205a made of magnetic metal. The position of the movable contact 203 is determined by measuring the magnetic flux density of the magnetic path from the magnet 101b to the magnetic sensor 102b through the contact-side spring receiver 205a. A magnetic sensor output signal Ss1 is generated.

  That is, according to the third embodiment, similarly to the first embodiment, the magnetic sensor output signal Ss1 indicating the position of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 is obtained. The opening time and the closing time can be measured by measuring the time when the opening point and the closing point are reached. Further, since the magnet 101b and the magnetic sensor 102b are attached to the fixed portion, the impact force applied to the magnet 101b is smaller than that in the first embodiment, and the reliability of the magnetic sensor output signal Ss1 is improved.

Embodiment 4 FIG.
FIG. 6 is a block diagram and a side view showing the configuration of the switching time measuring apparatus 100c according to Embodiment 4 of the present invention, and a side view showing the configuration of the power switching apparatus 200. In the fourth embodiment, compared with the first embodiment, (1) the acceleration sensor 105 is used instead of the magnet 101 and the magnetic sensor 102, and (2) the sensor signal measuring device 103c is the magnetic sensor output signal Ss1. Instead of measuring and storing the acceleration sensor output signal Ss2 and outputting the time series signal Ssq2 instead of the time series signal Ssq1, and (3) the time series signal Ssq1 instead of the time series signal Ssq1. This is different from measuring the opening time and closing time based on Ssq2. The acceleration sensor 105 is disposed at a position that moves together with the contact-side movable shaft 204 such as the contact-side spring receiver 205, and outputs an acceleration sensor output signal Ss2 indicating the acceleration with respect to the axial direction of the contact-side movable shaft 204 to the sensor signal measuring device 103c. To do. Since the contact-side spring receiver 205 moves together with the movable contact 203, the signal level of the acceleration sensor output signal Ss2 indicates the acceleration of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204.

  FIG. 7 is a timing chart showing the relationship between the acceleration sensor output signal Ss2, the contact state of the power switching device 200, and the measurement control command signal Sc when the power switching device 200 of FIG. 6 is closed. At time t7, the power switch 200 is in an open state (FIG. 1A), the measurement control command signal Sc changes from the L level to the H level, and the power switch 200 starts a closing operation. Next, at time t8, the power switching device 200 reaches the closing point (FIG. 1B), and at time t9, the power switching device 200 reaches the closing state (FIG. 1C). Here, the acceleration sensor output signal Ss2 is stored in the memory 103cm for a predetermined time from the time t7, and the sensor signal measuring device 103c reads the acceleration sensor output signal Ss2 from the memory 103cm, and measures the open / close extreme time as the time series signal Ssq2. Output to the device 104c.

  Next, with reference to FIG. 7, a method for measuring the closing time performed by the switching pole time measuring device 104c will be described. At the time when the closing operation is started (time t7), the contact-side movable shaft 204 starts to move, so that a transient vibration occurs due to the start of movement, and a clear first peak point P11 appears in the time series signal Ssq2. To do. Thereafter, when the closing pole point (time t8) is reached, the contact-side movable shaft 204 suddenly stops, so that a clear second peak point P12 appears in the time series signal Ssq2. Therefore, when the second peak point P12 is detected, the time t8 when the power switching device 200 reaches the closing point can be detected. Since the first peak point P11 appears immediately after the measurement control command signal Sc is input, the first peak point P11 is configured not to detect the peak point that appears immediately after the measurement control command signal Sc is input. Misdetection of the time when the closing point is reached can be avoided. The second peak point P12 is detected by applying a band-pass filter to the time series signal Ssq2 to extract only the vibration frequency component associated with the sudden stop of the contact-side movable shaft 204, and then determining the second peak point P12. The second peak point P12 may be detected based on the absolute value of the signal level of the time series signal Ssq2 so as not to depend on the sign level of the time series signal Ssq2. May be. The closing time tc2 can be measured by obtaining the difference between the time t7 and the time t8 that are the starting points of the time series signal Ssq2.

  FIG. 8 is a timing chart showing the relationship between the acceleration sensor output signal Ss2 when the power switch 200 in FIG. 6 opens, the contact state of the power switch 200, and the measurement control command signal Sc. At time t10, the power switching apparatus 200 is in a closed state (FIG. 1C), the measurement control command signal Sc changes from L level to H level, and the power switching apparatus 200 starts the opening operation. Next, at time t11, the power switching device 200 reaches the opening point (FIG. 1B), and further, at time t12, the power switching device 200 reaches the opening state (FIG. 1C). Here, the acceleration sensor output signal Ss2 is stored in the memory 103cm for a predetermined time from the time t10, and the sensor signal measuring device 103c reads the acceleration sensor output signal Ss2 from the memory 103cm and measures the open / close extreme time as the time series signal Ssq2. Output to the device 104c.

  Next, with reference to FIG. 8, the measuring method of the opening time performed by the switching time measuring device 104c will be described. Since the contact-side movable shaft 204 is stopped from the time when the opening operation is started (time t10) until the opening point (time t11) is reached, the time series signal Ssq2 becomes a constant value. When the opening point (time t11) is reached, the contact-side movable shaft 204 starts to move, so that a transient vibration accompanying the start of movement occurs, and a clear first peak point P21 appears in the time series signal Ssq2. Thereafter, when the opening operation is completed (time t12), the contact-side movable shaft 204 suddenly stops, so that a clear second peak point P22 appears in the time-series signal Ssq2. Therefore, when the first peak point P21 is detected, the time t11 when the power switching device 200 reaches the opening point can be detected. The first peak point P21 is detected by applying a bandpass filter to the time-series signal Ssq2 in the same manner as in the case of the above-described closing operation, and vibration frequency components accompanying the start of movement of the contact-side movable shaft 204. The first peak point P21 may be detected after extracting only, and based on the absolute value of the signal level of the time-series signal Ssq2 so as not to depend on the sign of the signal level of the time-series signal Ssq2. The first peak point P21 may be detected. The opening time to2 can be measured by obtaining the difference between the time t10 and the time t11 that are the starting points of the time series signal Ssq2.

  As described above, according to the fourth embodiment, the opening / closing pole time measuring device 100c for measuring the opening time and the closing time of the power switching device 200 that opens and closes the power by the fixed contact 202 and the movable contact 203. , The acceleration sensor 105 that generates and outputs the acceleration sensor output signal Ss2 indicating the acceleration of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 of the power switchgear 200, and the input time of the measurement control command signal Sc, or A sensor that measures and stores the acceleration sensor output signal Ss2 as a time series signal Ssq2 from the input time of the current signal Si indicating the rise of the coil current of the closing coil 210 or the opening coil 211 of the power switch 200 Appears in the time series signal Ssq2 at the opening or closing point of the signal measuring device 103c and the power switching device 200. The time at which the opening point or the closing point is reached is detected by detecting the peak point P12 or P21, and the opening time from the starting point to the time at which the opening point is reached, or from the starting point to the closing point. And an opening / closing pole time measuring device 104c for measuring the closing time until the reached time.

  That is, according to the fourth embodiment, the acceleration of the movable contact 203 with respect to the axial direction of the contact-side movable shaft 204 is measured by paying attention to the operation characteristics during the opening / closing operation of the contact-side movable shaft 204 of the power switching device 200. Since the acceleration sensor 105 is arranged at the same time and the time when the power switching device 200 reaches the opening point and the closing point is accurately measured in the opening / closing pole time measuring device 104c, the opening time to2 and the closing time tc2 are measured. Can be measured accurately.

  As described above in detail, according to the switching time measuring apparatus and method according to the present invention, the sensor means is arranged to measure the position or acceleration of the movable contact with respect to the axial direction of the contact-side movable shaft, Since the time at which the fixed contact is released or contacted is detected as an inflection point or peak point in the signal output by the sensor means, the opening time and closing time of the power switchgear can be accurately obtained.

  100, 100c Opening / closing pole time measuring device, 101, 101a, 101b Magnet, 102, 102a, 102b Magnetic sensor, 101as, 102as Support member, 101bs, 102bs Housing inner wall of power switching device, 103, 103c Sensor signal measuring device, 103m , 103 cm, 104 m, 104 cm Memory, 103 p, 103 cp, 104 p, 104 cp Processor, 104, 104 c Opening / closing time measuring device, 105 Acceleration sensor, 200 Power switch, 201 Vacuum valve, 202 Fixed contact, 203 Movable contact, 204 Contact side Movable shaft, 205, 205a Contact side spring receiver, 206 Contact pressure spring, 207 Coil side spring receiver, 208 Coil side movable shaft, 209 Movable iron core, 210 Closing coil, 211 Opening coil, Dc Closing time data, Do opening time data, M1, M2 magnetic path, P1, P2 inflection point or peak point, P11, P12 first peak point, P21, P22 second peak point, Sc measurement control command signal, Si current signal, Ss1 magnetic sensor output signal, Ss2 acceleration sensor output signal, Ssq1, Ssq2 time series signal, tc1, tc2 closing time, to1, to2 opening time.

Claims (7)

In an opening / closing pole time measuring device for measuring the opening time and closing time of a power switching device that opens and closes power by a fixed contact and a movable contact,
Sensor means for generating and outputting a sensor output signal indicating the position of the movable contact with respect to the axial direction of the movable contact side movable shaft of the power switch;
Sensor signal measuring means for measuring and storing the sensor output signal as a time series signal starting from the input time of the measurement control command signal or the rise time of the coil current of the power switchgear,
By detecting an inflection point or peak point appearing in the time series signal at the opening point or closing point of the power switchgear, the time when the opening point or the closing point is reached is detected, and the opening point is determined from the starting point. An opening / closing pole time measuring device for measuring the opening time until the time when the contact point is reached or the closing time from the starting point to the time when the contact point is reached.   The sensor means is provided so as not to move together with the movable contact side movable shaft, and the position of the movable contact is determined by measuring a magnetic flux density from a magnet provided so as to move together with the movable contact side movable shaft. 2. The switching time measuring apparatus according to claim 1, wherein the magnetic sensor generates a sensor output signal.   The sensor means is opposed to the movable contact side movable shaft made of magnetic metal, or a member that moves together with the movable contact side movable shaft made of magnetic metal, and does not move with the movable contact side movable shaft. The position of the movable contact is determined by measuring the magnetic flux density of the magnetic path from the magnet to the magnetic sensor via the movable contact side movable shaft or the member. 2. The switching time measuring apparatus according to claim 1, wherein a sensor output signal is generated.   The sensor means are opposed to each other so as to sandwich the movable contact side movable shaft made of magnetic metal, or a member that moves together with the movable contact side movable shaft made of magnetic metal, and the movable contact side movable shaft. A magnet and a magnetic sensor provided so as not to move together with the shaft, and by measuring the magnetic flux density related to the magnetic path from the magnet to the magnetic sensor through the movable contact side movable shaft or the member, 2. The switching time measuring apparatus according to claim 1, wherein a sensor output signal indicating the position of the movable contact is generated. In an opening / closing pole time measuring device for measuring the opening time and closing time of a power switching device that opens and closes power by a fixed contact and a movable contact,
An acceleration sensor that generates and outputs a sensor output signal indicating the acceleration of the movable contact with respect to the axial direction of the movable contact side movable shaft of the power switch;
Sensor signal measuring means for measuring and storing the sensor output signal as a time series signal starting from the input time of the measurement control command signal or the rise time of the coil current of the power switchgear,
By detecting an inflection point or peak point appearing in the time series signal at the opening point or closing point of the power switchgear, the time when the opening point or the closing point is reached is detected, and the opening point is determined from the starting point. An opening / closing pole time measuring device for measuring the opening time until the time when the contact point is reached or the closing time from the starting point to the time when the contact point is reached. In an opening / closing pole time measurement method for measuring the opening time and closing time of a power switching device that opens and closes power by a fixed contact and a movable contact,
Generating and outputting a sensor output signal indicating the position of the movable contact with respect to the axial direction of the movable contact side movable shaft of the power switch; and
Measuring and storing the sensor output signal as a time-series signal starting from the input time of the measurement control command signal or the rise time of the coil current of the power switching device; and
By detecting an inflection point or peak point appearing in the time series signal at the opening point or closing point of the power switchgear, the time when the opening point or the closing point is reached is detected, and the opening point is determined from the starting point. And measuring the opening time until the time when the contact point is reached from the starting point to the time when the contact point is reached. In an opening / closing pole time measurement method for measuring the opening time and closing time of a power switching device that opens and closes power by a fixed contact and a movable contact,
Generating and outputting a sensor output signal indicating the acceleration of the movable contact with respect to the axial direction of the movable contact-side movable shaft of the power switch;
Measuring and storing the sensor output signal as a time-series signal starting from the input time of the measurement control command signal or the rise time of the coil current of the power switching device; and
By detecting an inflection point or peak point appearing in the time series signal at the opening point or closing point of the power switchgear, the time when the opening point or the closing point is reached is detected, and the opening point is determined from the starting point. And measuring the opening time until the time when the contact point is reached from the starting point to the time when the contact point is reached.

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