JP2011176919A - Equipment monitoring device and equipment monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To find out the inactivity of equipment which is installed in an electric station via a remote controller. <P>SOLUTION: In a first mode, a second control unit supplies a gradually raised voltage signal to the tripping coil or input coil of a breaker as a test signal for performing the operation test of a blocking circuit, and a determination part obtains a minimum operation voltage at which the breaker has operated according to the test signal based on an event signal indicating the operation state of the blocking circuit, and then determines that the blocking circuit has operated with specified performance if the minimum operation voltage is under a specified reference operation voltage. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a device monitoring apparatus and a device monitoring system.

  In order to ensure the reliability of the electric power system, it is important to appropriately monitor electric stations such as power plants and substations, and electric lines such as transmission lines and distribution lines. In addition, there are many unmanned cases in electrical stations where traffic is inconvenient or for efficient operation of electric stations, and many devices installed in electric stations are generally remote from control stations and power stations. Controlled (remotely operated) and remotely monitored at those facilities.

  Among the equipment in electrical stations, circuit breakers, in particular, not only open and close the circuit when the power system is functioning properly, but also reduce the accident current in a short time in the event of a short circuit or ground fault. It is installed for the purpose of blocking and preventing the serious impact of the accident. Therefore, it is desirable for the circuit breaker and the (protection) relay that controls the circuit breaker to grasp not only a failure but also an abnormal operation such as a failure sign before the failure occurs in a timely manner.

  For example, in Patent Document 1, an open / close command signal is input to a circuit breaker from a remote control device (distance control device) installed in a substation, and an output signal of an auxiliary switch that operates according to the opening / closing operation of the circuit breaker changes. Disclosed is a remote monitoring system for a substation circuit breaker that determines the state of the circuit breaker according to the operation time (response time) until.

  Thus, the state of the circuit breaker can be determined according to the operation time by measuring the operation time from the time when the command signal is input to the circuit breaker.

JP 2005-168121 A

  However, in the remote monitoring system disclosed in Patent Document 1, since the state of the circuit breaker is determined based only on the operation time that is difficult to manage, it is difficult to grasp the precursor of the circuit breaker refractory due to aged grease solidification. It was insufficient as a condition-based maintenance (CBM). For this reason, in order to improve the monitoring accuracy of the equipment installed in the electric power station, when performing tests on other equipment such as relays or tests other than measurement of operating time, such as minimum operating voltage, It was necessary to install the test separately.

  The main present invention for solving the above-mentioned problems is a circuit breaker including a circuit breaker that opens and closes a power line of an electric power system and cuts off an accident current of the power line based on remote control information input via a remote control device. A first control unit that outputs a control signal for performing open / close control of the circuit; a second control unit that outputs a test signal for performing an operation test of the shut-off circuit based on the remote control information; A determination unit that determines whether or not the cutoff circuit has operated with a predetermined performance in accordance with the test signal based on an event signal indicating an operation state of the cutoff circuit, and the second control unit In the first mode, a voltage signal that gradually increases as the test signal is supplied to the tripping coil or the closing coil of the circuit breaker, and the determination unit is configured to output the event signal in the first mode. In And determining the minimum operating voltage at which the circuit breaker operates in response to the test signal, and determining that the circuit breaker has operated at the predetermined performance when the minimum operating voltage is less than a predetermined reference operating voltage. It is a device monitoring device.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  ADVANTAGE OF THE INVENTION According to this invention, the refractory movement of the apparatus installed in the electric station via a remote control apparatus can be discovered at an early stage.

It is a block diagram which shows the structure of the apparatus monitoring apparatus in one Embodiment of this invention. It is a block diagram which shows the outline of a structure of the whole apparatus monitoring system provided with the apparatus monitoring apparatus in one Embodiment of this invention. 3 is a circuit block diagram illustrating an example of a specific configuration of a test control unit 12. FIG. 6 is a diagram illustrating an example of a relationship between remote control information input to an interface unit 121 and each selection signal output from the interface unit 121. FIG. It is a schematic diagram which shows an example of the relationship between the marker signal S0M, the test signal TSt1, and the event signal EVb1 in the circuit breaker cutting operation time test (test mode 1). It is a figure which expands and shows each 3 phase change of the event signal EVb1 shown in FIG. 5 in the time-axis direction. It is a schematic diagram which shows an example of the relationship between the marker signal S0M, the test signal TSt1, and the event signal EVb1 in the circuit breaker operating voltage test (test mode 2). It is a schematic diagram which shows an example of the relationship between the marker signal S0M, the test signal TSc1, and the event signal EVb1 in the breaker on-operation time test (test mode 3). It is a schematic diagram which shows an example of the relationship of the marker signal S0M, the test signal TSc1, and the event signal EVb1 in the on-operation voltage test (test mode 4) of a circuit breaker. It is a schematic diagram which shows an example of the relationship between the marker signal S0M, the test signal TSr1, and the event signal EVr1 in the relay operating time test (test mode 5) for a current of 130% of the settling current value. It is a schematic diagram which shows an example of the relationship between the marker signal S0M, the test signal TSr1, and the event signal EVr1 in the relay operating time test (test mode 6) for a current of 400% of the settling current value. 4 is a flowchart for explaining determination processing of a determination unit 18; It is a circuit block diagram which shows the other structural example of the voltage signal generation part which generate | occur | produces the test signal in the incoming operation voltage test (test mode 4) of a circuit breaker. FIG. 14 is a schematic diagram illustrating an example of a relationship among a marker signal S0M, a test signal TSc1, and an event signal EVb1 when performing an on-operation voltage test (test mode 4) of the circuit breaker using the voltage signal generation unit illustrated in FIG. .

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== General configuration of the entire device monitoring system ===
Hereinafter, with reference to FIG. 2, an outline of a configuration of an entire device monitoring system including a device monitoring apparatus according to an embodiment of the present invention to be described later will be described.

  The equipment monitoring system shown in FIG. 2 is a system for monitoring the breaking circuits 21 to 23 installed in the electric station. In addition to the equipment monitoring apparatus 1, a remote control slave station installed in the electric station is provided. The apparatus 8 is configured to include a remote control master station apparatus 9 installed in a control station, for example.

  The cutoff circuits 21 to 23 to be monitored are installed on power transmission lines (distribution lines) 31 to 33 branched from the bus 3, respectively. Further, the control signals CN1 to CN3 or the test signals TS1 to TS3 are respectively input from the device monitoring apparatus 1 to the cutoff circuits 21 to 23 in accordance with a normal control mode or a test control mode described later. On the other hand, event signals EV1 to EV3 are input to the device monitoring apparatus 1 from the cutoff circuits 21 to 23, respectively. A detailed description of the configuration of the device monitoring device 1 and each cutoff circuit will be given later.

  Remote control information TC is input from the remote control slave station device 8 to the device monitoring device 1, and determination result information JD is input from the device monitoring device 1 to the remote control slave device 8. The remote control slave station device 8 and the remote control master station device 9 are connected via, for example, a public communication network.

=== Configuration of Device Monitoring Device ===
Hereinafter, with reference to FIG. 1, the structure of the apparatus monitoring apparatus in one Embodiment of this invention is demonstrated. FIG. 1 illustrates an example of a specific configuration of each cutoff circuit that is a monitoring target of the device monitoring apparatus.

  In FIG. 1, the remote control information TC includes remote control information TCn and TCt. The control signal CN1 is composed of control signals CNt1 and CNc1, the test signal TS1 is composed of test signals TSt1, TSc1, and TSr1, and the event signal EV1 is composed of event signals EVr1 and EVb1.

  The device monitoring apparatus 1 illustrated in FIG. 1 includes a normal control unit 11, a test control unit 12, a determination unit 18, and a recording unit 19. Moreover, the interruption | blocking circuit 21 is comprised including the relay 212, the circuit breaker 213, and the current transformer 214, for example. It is assumed that the cutoff circuits 22 and 23 have the same configuration.

  Each phase current I1 of the power transmission line 31 is output from the current transformer 214. The trigger signal TR output from the relay 212 is input to the circuit breaker 213 installed on the power transmission line 31.

  The remote control information TCn output from the remote control slave station device 8 is input to the normal control unit 11. Further, the control signals CNt1 and CNc1 output from the normal control unit 11 are input to the circuit breaker 213.

  On the other hand, the remote control information TCt is input to the test control unit 12. The test signals TSt1 and TSc1 output from the test control unit 12 are input to the circuit breaker 213, and the test signal TSr1 is input to the relay 212.

  The determination unit 18 includes a storage unit 181. Further, the determination unit 18 includes the remote control information TCt, the control signals CNt1, CNc1, the test signals TSt1, TSc1, and TSr1, together with the trigger signal TR and each phase current I1 of the transmission line 31 as event signals EVr1 and EVb1, respectively. Have been entered. Further, the determination result information JD output from the determination unit 18 is input to the remote control slave station device 8. The event information ED is input to the recording unit 19 together with the determination result information JD.

=== Configuration of Test Control Unit ===
Hereinafter, a more specific configuration of the test control unit 12 will be described with reference to FIGS. 3 and 4. In FIG. 3, the remote control information TCt includes circuit selection information CSL and mode selection information MSL.

  The test control unit 12 includes, for example, an interface unit 121, a clock unit 122, a voltage signal generation unit 123, a current signal generation unit 124, switch circuits 131 to 133, 141 to 143, and 151 to 153.

  The circuit selection information CSL and mode selection information MSL output from the remote control slave station device 8 are input to the interface unit 121. Further, as shown in FIG. 4, the interface unit 121 outputs circuit selection signals SL1 to SL3, device control selection signals SLt, SLc, SLr, a voltage gradient selection signal SLP, and a current value selection signal IHL. Further, a marker signal S0M is output from the clock unit 122.

  In addition to the marker signal S0M, the device control selection signals SLt and SLc and the voltage gradient selection signal SLP are input to the voltage signal generation unit 123, and the voltage signal TSb is output from the voltage signal generation unit 123. In addition, the device signal selection signal SLr and the current value selection signal IHL are input to the current signal generation unit 124 together with the marker signal S0M, and the current signal TSr is output from the current signal generation unit 124.

  One ends of the switch circuits 131 to 133 are connected in parallel to the output of the voltage signal generator 123, and circuit selection signals SL1 to SL3 are input as control signals, respectively. In addition, one end of each of the switch circuits 151 and 152 is connected in parallel to the other end of the switch circuit 131, and device control selection signals SLt and SLc are input as control signals, respectively. The other ends of the switch circuits 151 and 152 are connected to a tripping coil and a closing coil (not shown) of the circuit breaker 213.

  Therefore, the voltage signal TSb is input as the test signal TSt1 to the tripping coil of the circuit breaker 213 via the switch circuits 131 and 151. The voltage signal TSb is input to the closing coil of the circuit breaker 213 as the test signal TSc1 through the switch circuits 131 and 152. It is assumed that the other ends of the switch circuits 132 and 133 are connected to the circuit breakers of the circuit breakers 22 and 23 via the switch circuit similarly to the switch circuit 131, respectively.

  One end of each of the switch circuits 141 to 143 is connected in parallel to the output of the current signal generator 124, and circuit selection signals SL1 to SL3 are input as control signals, respectively. Further, one end of the switch circuit 153 is connected to the other end of the switch circuit 131, and the device control selection signal SLr is input as a control signal. The other end of the switch circuit 153 is connected to the relay 212.

  Therefore, the current signal TSr is input to the relay 212 as the test signal TSr1 via the switch circuits 141 and 153. It is assumed that the other ends of the switch circuits 142 and 143 are connected to the relays of the cutoff circuits 22 and 23 through the switch circuit similarly to the switch circuit 141.

=== Outline of overall operation of device monitoring system ===
The overall operation of the device monitoring system will be described below with reference to FIGS. 1 to 4 as appropriate. In the following, only operations related to the control of the cutoff circuit 21 will be described, and the cutoff circuits 22 and 23 are also controlled similarly.

  The remote control master station device 9 installed in the control station transmits the remote control information TC to the remote control slave station device 8 installed in the electric station in accordance with an automatic control program or an operator's operation. Further, the remote control slave station device 8 inputs the remote control information TCn to the normal control unit 11 (first control unit) or inputs the remote control information TCt to the test control unit 12 (second control unit). Thus, the control mode of the device monitoring apparatus 1 can be switched.

  In the normal control mode in which opening / closing control of the cutoff circuit 21 is performed, the normal control unit 11 outputs the control signal CN1 based on the remote control information TCn. In this case, the remote control information TCn is, for example, an open / close command signal for the circuit breaker 213, as in the remote monitoring system of Patent Document 1, and the normal control unit 11 uses the same method as the known system to cut off the circuit 21 Can be remotely controlled.

  In the case of a short circuit accident or a ground fault, the circuit breaker 213 automatically shuts off regardless of remote control. For example, the relay 212 is an overcurrent relay that detects a short-circuit fault or a ground fault based on the fault current detected by the current transformer, and the circuit breaker 213 is in response to the trigger signal TR output from the relay 212. Perform the opening operation (tripping) to open the pole and cut off the accident current.

  On the other hand, in the test control mode in which the operation test of the cutoff circuit 21 is performed, the test control unit 12 outputs the test signal TS1 based on the remote control information TCt. In this case, as shown in FIG. 4, the interface unit 121 sets any one of the circuit selection signals SL1 to SL3 to a high level according to the circuit selection information CSL in the remote control information TCt, and operates. Select the circuit to be tested. Further, the interface unit 121 outputs device control selection signals SLt, SLc, SLr, a voltage gradient selection signal SLP, and a current value selection signal IHL according to the mode selection information MSL, and selects a test mode for the operation test.

  Here, the device monitoring apparatus 1 of the present embodiment includes test modes 1 to 6, and the operation in each test mode will be described below. In the following description, the circuit selection signals SL1 to SL3 are high level, low level, and low level (hereinafter referred to as SL1 = H, SL2 = L, SL3 = L), respectively, and are subject to testing. Assume that the cutoff circuit 21 is selected.

=== Operation of Device Monitoring Device in Test Mode 1 ===
First, the operation in the test mode 1 of the device monitoring apparatus 1 will be described with reference to FIGS. 5, 6, and 12 as appropriate. The test mode 1 and the test mode 3 described later correspond to the second mode.

  In the test mode 1, the device control selection signals are SLt = H, SLc = L, and SLr = L, and the test control unit 12 performs a disconnection operation test of the circuit breaker 213. In this case, the test signal TSt1 that is the voltage signal TSb is supplied to the tripping coil of the circuit breaker 213 as the test signal TS1. Further, the voltage ramp selection signal is SLP = L, and the voltage of the voltage signal TSb is a constant voltage. In this case, the determination unit 18 determines the state of the circuit breaker 213 based on the cutting operation time Top of the circuit breaker 213 corresponding to the test signal TSt1.

  Here, FIG. 5 shows an example of the relationship among the marker signal S0M, the test signal TSt1, and the event signal EVb1 in the disconnection operation time test of the circuit breaker 213. FIG. 6 shows the change of each of the three phases of the event signal EVb1 (each phase current I1) enlarged in the time axis direction.

  The clock unit 122 counts the current time and outputs a marker signal S0M indicating the timing of 0 seconds per minute. The clock unit 122 preferably has a function of correcting the time so that the current time can be measured correctly. For example, a method is known that receives GPS signals transmitted from four GPS (Global Positioning System) satellites and corrects the current time. In addition, time information included in standard radio waves transmitted in each country can be used. For example, a standard radio wave transmitted from a Japanese standard frequency station includes a 0.2 second pulse indicating a timing of 0 second, and the marker signal S0M can be generated using the pulse.

  The voltage signal generator 123 raises the voltage of the voltage signal TSb to a predetermined constant voltage (for example, 100 V) at the rising edge of the marker signal S0M (at time t0). The constant voltage signal TSb is supplied as a test signal TSt1 to the tripping coil of the circuit breaker 213 via the switch circuits 131 and 151 that are turned on. Then, the circuit breaker 213 performs a cutting operation according to the test signal TSt1.

  When the breaking operation of the circuit breaker 213 is completed, each phase current I1 of the power transmission line 31 is interrupted (at time t0 + t1). In addition, the determination unit 18 obtains a time t1 from the rise of the test signal TSt1 (start of the cutting operation) to the interruption of each phase current I1 (the completion of the cutting operation) as the cutting operation time Top of the circuit breaker 213.

  In addition, the current of each of the three phases of each phase current I1 is cut off at the zero point in order according to the timing. For example, as shown in FIG. 6, the currents I1_r, I1_s, and I1_t of the three phases are cut off at the zero point in this order. In this case, assuming that the respective cutting operation times are Top_r, Top_s, and Top_t, the determination unit 18 can calculate, for example, an average value of these values as the cutting operation time Top of the circuit breaker 213. Further, the determination unit 18 can also determine any one of the maximum value Top_t, the median value Top_s, and the minimum value Top_r as the cutting operation time Top.

  Furthermore, the determination part 18 calculates | requires the difference of each cutting operation time. For example, when the zero point is interrupted in the order shown in FIG. 6, the cutting operation time difference Drs (= Top_s-Top_r) and Dst (= Top_t-Top_s) are calculated. And the determination part 18 performs the determination process of the state of the circuit breaker 213 based on the cutting operation time Top and the cutting operation time difference Drs and Dst.

  In the present embodiment, when the breaking operation of the circuit breaker 213 starts, the rising edge of the marker signal S0M, that is, the timing of 0 second per minute is set. Therefore, if the circuit breaker 213 starts the disconnection operation at H hours, M minutes, and 0 seconds, the disconnection operation is completed at H hours, M minutes, and t1 seconds. (= T1) can be directly obtained.

  Further, when the cut-off operation test is performed after a power failure, the event signal EVb1 indicating the operation state of the circuit breaker 213 operates according to the opening / closing operation of the circuit breaker 213, for example, as in the remote monitoring system of Patent Document 1. The output signal of the auxiliary switch may be used.

Here, the determination process of the determination unit 18 in the test mode 1 will be described with reference to FIG.
When the event signal EVb1 corresponding to the test signal TSt1 is input, the determination unit 18 first obtains the cut operation time Top and the cut operation time differences Drs and Dst, and starts the determination process (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 1 (S2: = 1), the measurement value MV to be determined is set as the cut-off operation time Top, and the threshold TV serving as the determination reference is set as the reference cut-off operation time Ttht (S31). The reference cut operation time Ttht and the reference on operation time Tthc in the test mode 3 described later correspond to a first reference operation time. In FIG. 5, the reference cut operation time Ttht is set to 50 ms as an example.

  Next, the determination unit 18 compares the cutting operation time differences Drs and Dst with a predetermined reference time difference Dth (S4). Here, when the discontinuity of the cut-off operation times of the three phases of each phase current I1 is large, at least one of the cut-off operation time differences Drs and Dst becomes equal to or greater than the reference time difference Dth. In this case (S4: NO), it is determined that the circuit breaker 213 has not been turned off with a predetermined performance, and the determination result signal JD is set to 2 in accordance with the determination result that the irregularity is defective. Is finished (S8). As an example, when the current of each of the three phases is normally cut off at zero points at intervals of about 5.6 ms, the reference time difference Dth is set to 7.0 ms.

  On the other hand, when both the cutting operation time differences Drs and Dst are less than the reference time difference Dth (S4: YES), the determination unit 18 compares the measured value MV (= Top) with the threshold value TV (= Ttht) (S5). ). If the cut-off operation time Top is less than the reference cut-off operation time Ttht (S5: YES), it is determined that the circuit breaker 213 has performed a cut-off operation with a predetermined performance, and according to the determination result of the normal operation. Then, the determination result signal JD is set to 0, and the determination process is terminated (S6). On the other hand, when the cut-off operation time Top is equal to or longer than the reference cut-off operation time Ttht (S5: NO), it is determined that the circuit breaker 213 has not performed the cut-off operation with a predetermined performance, and according to the determination result of the operation failure. Thus, the determination result signal JD is set to 1, and the determination process is ended (S7).

  When the determination process of the determination unit 18 ends, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9 installed in the control center. The recording unit 19 records the value of the determination result signal JD for each operation test as time series data. In addition to the determination result signal JD, for example, event information ED indicating the operation history of the cutoff circuit 21 is also recorded in the recording unit 19 in accordance with changes in the event signals EVr1 and EVb1 in the normal control mode and the test control mode. The Furthermore, the recording unit 19 may record, for example, the measurement value MV that is a determination target for each operation test together with the time series data.

=== Operation of Device Monitoring Device in Test Mode 2 ===
Next, the operation in the test mode 2 of the device monitoring apparatus 1 will be described with reference to FIGS. 7 and 12 as appropriate. The test mode 2 and the test mode 4 described later correspond to the first mode.

  In the test mode 2, as in the test mode 1, the test control unit 12 performs a disconnection operation test of the circuit breaker 213, and the test signal TSt1 which is the voltage signal TSb is tripped from the circuit breaker 213 as the test signal TS1. Supplied to the coil. The voltage ramp selection signal is SLP = H, and the voltage of the voltage signal TSb is a ramp voltage described later. In this case, the determination unit 18 determines the state of the circuit breaker 213 based on the minimum cut-off operating voltage Vmt of the circuit breaker 213 corresponding to the test signal TSt1.

  Here, FIG. 7 shows an example of the relationship among the marker signal S0M, the test signal TSt1, and the event signal EVb1 in the disconnection operation voltage test of the circuit breaker 213. Note that the clock unit 122 outputs the same marker signal S0M as in the test mode 1, and FIG. 7 is different from FIG. 5 in the scale of the time axis.

  The voltage signal generator 123 starts rising of the voltage signal TSb at the rising edge of the marker signal S0M (at time t0), and the voltage of the voltage signal TSb gradually increases with a certain slope. In FIG. 7, as an example, the voltage of the voltage signal TSb increases from 0 V to 100 V in 2 seconds, and the slope a is a = 50 V / s. The ramp voltage signal TSb is supplied as a test signal TSt1 to the tripping coil of the circuit breaker 213 via the switch circuits 131 and 151 that are turned on. Then, the circuit breaker 213 performs a cutting operation according to the test signal TSt1.

  When the breaking operation of the circuit breaker 213 is completed, each phase current I1 of the power transmission line 31 is cut off (at time t0 + t2). Further, the determination unit 18 determines from the time t2 from the start of the rising edge of the test signal TSt1 to the cutoff of each phase current I1 (completion of the cut operation), the cut operation time Top in the test mode 1, and the voltage gradient a of the test signal TSt1. The minimum cut-off operating voltage Vmt of the circuit breaker 213 is obtained. As an example, when t2 = 850 ms and Top = 50 ms, the voltage V = a × (t2−Top) = 40 V of the test signal TSt1 at the time of t = t2−Top = 800 ms is calculated as the minimum cut-off operation voltage Vmt. And the determination part 18 performs the determination process of the state of the circuit breaker 213 based on the minimum cut-off operation voltage Vmt.

Here, the determination process of the determination unit 18 in the test mode 2 will be described with reference to FIG.
When the event signal EVb1 corresponding to the test signal TSt1 is input, the determination unit 18 first calculates the minimum cut-off operating voltage Vmt and starts the determination process (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 2 (S2: = 2), the measurement value MV to be determined is set as the minimum cutoff operating voltage Vmt, and the threshold value TV as the criterion for determination is set as the reference cutoff operating voltage Vtht (S32). The reference cut operation voltage Vtht and the reference on operation voltage Vthc in the test mode 4 described later correspond to a predetermined reference operation voltage. In FIG. 7, as an example, the reference cut operation voltage Vtht is 55V.
Finally, the determination unit 18 compares the measured value MV (= Vmt) with the threshold value TV (= Vtht) (S5). If the minimum cut-off operation voltage Vmt is less than the reference cut-off operation voltage Vtht (S5: YES), it is determined that the circuit breaker 213 has been turned off with a predetermined performance, and according to the determination result of the normal operation. Thus, the determination result signal JD is set to 0, and the determination process is terminated (S6). On the other hand, when the minimum cut-off operation voltage Vmt is equal to or higher than the reference cut-off operation voltage Vtht (S5: NO), it is determined that the circuit breaker 213 has not performed the cut-off operation with a predetermined performance, Accordingly, the determination result signal JD is set to 1, and the determination process is terminated (S7).

  As in the test mode 1, when the determination process of the determination unit 18 is completed, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9, and the recording unit 19 determines each operation test. The value of the result signal JD is recorded as time series data.

=== Operation of Device Monitoring Device in Test Mode 3 ===
Next, the operation of the device monitoring apparatus 1 in the test mode 3 will be described with reference to FIGS. 8 and 12 as appropriate.

  In the test mode 3, the device control selection signals are SLt = L, SLc = H, and SLr = L, and the test control unit 12 performs an on-operation test of the circuit breaker 213. In this case, the test signal TSc1, which is the voltage signal TSb, is supplied to the closing coil of the circuit breaker 213 as the test signal TS1. Further, the voltage ramp selection signal is SLP = L, and the voltage of the voltage signal TSb is a constant voltage. In this case, the determination unit 18 determines the state of the circuit breaker 213 based on the on-operation time Tcl of the circuit breaker 213 corresponding to the test signal TSc1.

  Here, an example of the relationship among the marker signal S0M, the test signal TSc1, and the event signal EVb1 in the on-operation time test of the circuit breaker 213 is shown in FIG. The clock unit 122 outputs the same marker signal S0M as in the test mode 1, and FIG. 8 is different from FIG. 5 in the scale of the time axis. The on-operation time test is performed following, for example, the test mode 1 or test mode 2 switching operation test. At the start of the test, each phase current I1 of the transmission line 31 is cut off.

  The voltage signal generator 123 raises the voltage of the voltage signal TSb to a predetermined constant voltage (for example, 100 V) at the rising edge of the marker signal S0M (at time t0). The constant voltage signal TSb is supplied to the closing coil of the circuit breaker 213 as the test signal TSc1 through the switch circuits 131 and 152 that are turned on. Then, the circuit breaker 213 performs an input operation according to the test signal TSc1.

  When the turning-on operation of the circuit breaker 213 is completed, each phase current I1 of the power transmission line 31 is turned on again (at time t0 + t3). In addition, the determination unit 18 obtains a time t3 from the rise of the test signal TSc1 (start of on-operation) to the input of each phase current I1 (on-operation completion) as the on-operation time Tcl of the circuit breaker 213. And the determination part 18 performs the determination process of the state of the circuit breaker 213 based on the input operation time Tcl.

Here, the determination process of the determination unit 18 in the test mode 3 will be described with reference to FIG.
When the event signal EVb1 corresponding to the test signal TSc1 is input, the determination unit 18 first obtains the on operation time Tcl and starts the determination process (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 3 (S2: = 3), the measurement value MV to be determined is set as the input operation time Tcl, and the threshold value TV as the determination reference is set as the reference input operation time Tthc (S33). In FIG. 8, as an example, the reference input operation time Tthc is 200 ms.
Finally, the determination unit 18 compares the measurement value MV (= Tcl) with the threshold value TV (= Tthc) (S5). If the on-operation time Tcl is less than the reference on-operation time Tthc (S5: YES), it is determined that the circuit breaker 213 has performed an on-operation with a predetermined performance, and according to the determination result of the normal operation. Then, the determination result signal JD is set to 0, and the determination process is terminated (S6). On the other hand, when the on-operation time Tcl is equal to or longer than the reference on-operation time Tthc (S5: NO), it is determined that the circuit breaker 213 has not performed the on-operation with a predetermined performance, and according to the determination result of the operation failure. Thus, the determination result signal JD is set to 1, and the determination process is ended (S7).

  As in the test mode 1, when the determination process of the determination unit 18 is completed, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9, and the recording unit 19 determines each operation test. The value of the result signal JD is recorded as time series data.

=== Operation of Device Monitoring Device in Test Mode 4 ===
Next, the operation in the test mode 4 of the device monitoring apparatus 1 will be described with reference to FIGS. 9 and 12 as appropriate.

  In the test mode 4, as in the test mode 3, the test control unit 12 performs an on-operation test of the circuit breaker 213. As the test signal TS1, the test signal TSc1, which is the voltage signal TSb, is an input coil of the circuit breaker 213. To be supplied. The voltage ramp selection signal is SLP = H, and the voltage of the voltage signal TSb is a ramp voltage. In this case, the determination unit 18 determines the state of the circuit breaker 213 based on the minimum input operation voltage Vmc of the circuit breaker 213 corresponding to the test signal TSc1.

  Here, FIG. 9 shows an example of the relationship among the marker signal S0M, the test signal TSc1, and the event signal EVb1 in such an incoming operation voltage test of the circuit breaker 213. Note that the clock unit 122 outputs the same marker signal S0M as in the test mode 2, and the scale of the time axis in FIG. 9 is the same as that in FIG. In addition, the on-operation voltage test is performed, for example, following the switching operation test in test mode 1 or test mode 2, and each phase current I1 of the transmission line 31 is cut off at the start of the test.

  The voltage signal generator 123 starts rising of the voltage signal TSb at the rising edge of the marker signal S0M (at time t0), and the voltage of the voltage signal TSb is gradually increased with a constant slope as in FIG. To rise. The ramp voltage signal TSb is supplied as a test signal TSc1 to the closing coil of the circuit breaker 213 via the switch circuits 131 and 152 that are turned on. Then, the circuit breaker 213 performs an input operation according to the test signal TSc1.

  When the closing operation of the circuit breaker 213 is completed, each phase current I1 of the power transmission line 31 is turned on again (at time t0 + t4). Further, the determination unit 18 determines from the time t4 from the start of rising of the test signal TSc1 to the input of each phase current I1 (completion of the input operation), the input operation time Tcl in the test mode 3, and the voltage slope a of the test signal TSc1. The minimum input operation voltage Vmc of the circuit breaker 213 is obtained. As an example, when t4 = 1200 ms and Tcl = 200 ms, the voltage V = a × (t4−Tcl) = 50 V of the test signal TSc1 at the time of t = t4−Tcl = 1000 ms is calculated as the minimum input operation voltage Vmc. And the determination part 18 performs the determination process of the state of the circuit breaker 213 based on the minimum input operation voltage Vmc.

Here, the determination process of the determination unit 18 in the test mode 4 will be described with reference to FIG.
When the event signal EVb1 corresponding to the test signal TSc1 is input, the determination unit 18 first calculates the minimum input operation voltage Vmc and starts determination processing (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 4 (S2: = 4), the measurement value MV to be determined is set as the minimum input operation voltage Vmc, and the threshold value TV as the determination reference is set as the reference input operation voltage Vthc (S34). In FIG. 9, as an example, the reference input operation voltage Vtht is 65V.
Finally, the determination unit 18 compares the measured value MV (= Vmc) with the threshold value TV (= Vthc) (S5). When the minimum input operation voltage Vmc is less than the reference input operation voltage Vthc (S5: YES), it is determined that the circuit breaker 213 has performed an input operation with a predetermined performance, and the determination result of the normal operation is determined. Thus, the determination result signal JD is set to 0, and the determination process is terminated (S6). On the other hand, when the minimum input operation voltage Vmc is equal to or higher than the reference input operation voltage Vthc (S5: NO), it is determined that the circuit breaker 213 has not performed an input operation with a predetermined performance, and the determination result of the operation failure is obtained. Accordingly, the determination result signal JD is set to 1, and the determination process is terminated (S7).

  As in the test mode 1, when the determination process of the determination unit 18 is completed, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9, and the recording unit 19 determines each operation test. The value of the result signal JD is recorded as time series data.

=== Operation of Device Monitoring Device in Test Mode 5 ===
Next, the operation in the test mode 5 of the device monitoring apparatus 1 will be described with reference to FIGS. 10 and 12 as appropriate. The test mode 5 and the test mode 6 described later correspond to the third mode.

  In the test mode 5, the device control selection signals are SLt = L, SLc = L, and SLr = H, and the test control unit 12 performs an operation test of the relay 212. In this case, the test signal TSr1 that is the current signal TSr is supplied to the relay 212 as the test signal TS1. Further, the current value selection signal is IHL = L, and the current value IL of the current signal TSr is a constant current of 130% of the settling current value Is of the relay 212. In this case, the determination unit 18 determines the state of the relay 212 based on the operation time Trl of the relay 212 corresponding to the test signal TSr1.

  Here, in such an operation time test of the relay 212, an example of the relationship among the marker signal S0M, the test signal TSr1, and the event signal EVr1 is shown in FIG.

  The current signal generator 124 outputs the current signal TSr having the current value IL at the rising edge of the marker signal S0M (at time t0). Further, the constant current signal TSr is supplied to the relay 212 as the test signal TSr1 through the switch circuits 131 and 153 that are turned on. And the relay 212 makes trigger signal TR high level according to test signal TSr1.

  When the trigger signal TR becomes a high level (at time t0 + t5), the determination unit 18 determines the time t5 from the rising edge (operation start) of the test signal TSr1 to the rising edge (operation completion) of the trigger signal TR as the operation time Trl of the relay 212. Asking. And the determination part 18 performs the determination process of the state of the relay 212 based on the operation time Trl. In the present embodiment, the trigger signal TR is used as the event signal EVr1 indicating the operation state of the relay 212.

Here, the determination process of the determination unit 18 in the test mode 5 will be described with reference to FIG.
When the event signal EVr1 corresponding to the test signal TSr1 is input, the determination unit 18 first obtains the operation time Trl and starts the determination process (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 5 (S2: = 5), the measurement value MV to be determined is set as the operation time Trl, and the threshold value TV as the determination reference is set as the reference operation time Tthl (S35). The reference operation time Tthl and the reference operation time Tthh in the test mode 6 described later correspond to a second reference operation time. In FIG. 10, as an example, the reference operation time Tthl is set to 500 ms.
Finally, the determination unit 18 compares the measured value MV (= Trl) with the threshold value TV (= Tthl) (S5). When the operation time Trl is less than the reference operation time Tthl (S5: YES), it is determined that the relay 212 has operated with a predetermined performance, and a determination result signal is determined according to the determination result of the normal operation. JD is set to 0, and the determination process is terminated (S6). On the other hand, when the operation time Trl is equal to or longer than the reference operation time Tthl (S5: NO), it is determined that the relay 212 has not operated with a predetermined performance, and the determination result is determined according to the determination result of the operation failure. The signal JD is set to 1 and the determination process is terminated (S7).

  As in the test mode 1, when the determination process of the determination unit 18 is completed, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9, and the recording unit 19 determines each operation test. The value of the result signal JD is recorded as time series data.

=== Operation of Device Monitoring Device in Test Mode 6 ===
Next, the operation in the test mode 6 of the device monitoring apparatus 1 will be described with reference to FIGS. 11 and 12 as appropriate.

  In the test mode 6, as in the test mode 5, the test control unit 12 performs an operation test of the relay 212, and the test signal TSr1 that is the current signal TSr is supplied to the relay 212 as the test signal TS1. Further, the current value selection signal is IHL = H, and the current value IH of the current signal TSr is a constant current of 400% of the settling current value Is of the relay 212. In this case, the determination unit 18 determines the state of the relay 212 based on the operation time Trh of the relay 212 according to the test signal TSr1.

  Here, in such an operation time test of the relay 212, an example of the relationship among the marker signal S0M, the test signal TSr1, and the event signal EVr1 is shown in FIG. Note that the clock unit 122 outputs the same marker signal S0M as in the test mode 5, and FIG. 11 is different from FIG. 10 in the scale of the time axis.

  The current signal generator 124 outputs the current signal TSr having the current value IH at the rising edge of the marker signal S0M (at time t0). Further, the constant current signal TSr is supplied to the relay 212 as the test signal TSr1 through the switch circuits 131 and 153 that are turned on. And the relay 212 makes trigger signal TR high level according to test signal TSr1.

  When the trigger signal TR becomes a high level (at time t0 + t6), the determination unit 18 determines the time t6 from the rising edge (operation start) of the test signal TSr1 to the rising edge of the trigger signal TR (operation completion) as the operation time Trh of the relay 212. Asking. And the determination part 18 performs the determination process of the state of the relay 212 based on the operation time Trh.

Here, the determination process of the determination unit 18 in the test mode 6 will be described with reference to FIG.
When the event signal EVr1 corresponding to the test signal TSr1 is input, the determination unit 18 first obtains the operation time Trh and starts the determination process (S1).
Next, the determination unit 18 sets a determination target and a determination criterion according to the mode selection information MSL (S2). In the case of the test mode 6 (S2: = 6), the measurement value MV to be determined is set as the operation time Trh, and the threshold value TV as the determination reference is set as the reference operation time Tthh (S36). In FIG. 11, as an example, the reference operation time Tthh is 200 ms.
Finally, the determination unit 18 compares the measured value MV (= Trh) with the threshold value TV (= Tthh) (S5). If the operation time Trh is less than the reference operation time Tthh (S5: YES), it is determined that the relay 212 has operated with a predetermined performance, and a determination result signal is determined according to the determination result of the normal operation. JD is set to 0, and the determination process is terminated (S6). On the other hand, when the operation time Trh is equal to or longer than the reference operation time Tthh (S5: NO), it is determined that the relay 212 has not operated with a predetermined performance, and the determination result is determined according to the determination result of the operation failure. The signal JD is set to 1 and the determination process is terminated (S7).

  As in the test mode 1, when the determination process of the determination unit 18 is completed, the remote control slave station device 8 transmits a determination result signal JD to the remote control master station device 9, and the recording unit 19 determines each operation test. The value of the result signal JD is recorded as time series data.

  As described above, the device monitoring apparatus 1 according to the present embodiment can perform early detection of circuit breaker refractory and detection of operation irregularities for each phase of the circuit breaker by performing a minimum operation test of the circuit breaker. It has become. Therefore, a highly reliable state monitoring and maintenance system can be constructed by conducting the minimum operation test at a distance. In addition, it is possible to perform an open / close test at any time in accordance with the system operation for a parallel power transmission line and the like, and an uninterruptible open / close inspection can also be performed for a distribution line by loop opening / closing by a distribution automation system.

=== Other Configuration Examples of Voltage Signal Generating Unit ===
In the device monitoring apparatus of the present invention, the voltage signal generator 123 may be configured as shown in FIG. 13, for example, and may output the voltage signal TSb as shown in FIG. 14 in the test modes 2 and 4.

  13 includes a clock generation circuit 1231, a counter circuit 1232, a selection circuit 1233, a level shift circuit 1234, switch circuits 1235 and 1236, and resistors R0 to R12. .

  A voltage test mode signal VMM, which will be described later, is input to the clock generation circuit 1231, and the clock signal CKp output from the clock generation circuit 1231 is input to the level shift circuit 1234. The counter circuit 1232 is configured as a 13-digit counter. An inverted signal of the clock signal CKp is input to the CK input (clock input), and the voltage test mode signal VMM is input to the CL input (clear input). An inverted signal is input. The counter circuit 1232 outputs a count value CNT.

  The resistors R0 to R12 are connected in series in this order, and one ends of the resistors R0 and R12 are connected to potentials of 0V and 100V, respectively. Since the resistance value of the resistor R0 is 40 kΩ and the resistance values of the resistors R1 to R12 are all 5 kΩ, the voltage at the connection point of each resistor is 40 V to 95 V in 5 V increments. .

  The selection circuit 1233 is configured as a 13-input 1-output multiplexer, and the count value CNT of the counter circuit 1232 is input to the selection control input. The data input corresponding to CNT = 0 to 11 is connected to the connection point of each of the resistors, and the data input corresponding to CNT = 12 is connected to a potential of 100V. The output voltage of the selection circuit 1233 is supplied to the level shift circuit 1234 as a power supply voltage.

  Switch circuits 1235 and 1236 have one end connected in common to the output node of voltage signal generator 123 and the other end connected to the output of level shift circuit 1234 and the potential of 100V, respectively. The switch circuits 1235 and 1236 are turned on or off in a complementary manner, with the voltage ramp selection signal SLP and its inverted signal inputted as control signals, respectively.

  Here, with reference to FIG. 14, the operation | movement of the equipment monitoring apparatus 1 in the test mode 4 using the said voltage signal generation part 123 is demonstrated as an example. 14 is different from FIG. 9 in the scale of the time axis.

  The voltage test mode signal VMM is a binary signal that is at a high level during the operation voltage tests in the test modes 2 and 4. Specifically, in the test modes 2 and 4, the high level is reached at the rising edge of the marker signal S0M, and the low level is reached when the count value CNT of the counter circuit 1232 becomes zero. A circuit that generates such a voltage test mode signal VMM can be configured by a logic circuit.

  The clock generation circuit 1231 outputs the clock signal CKp while the voltage test mode signal VMM is at the high level. Further, the counter circuit 1232 counts up at the falling edge of the clock signal CKp while the voltage test mode signal VMM is at high level, and the count value CNT sequentially increases from 0 to 12. Further, the output voltage of the selection circuit 1233 sequentially increases in increments of 5V from 40V to 100V according to the count value CNT of the counter circuit 1232. Then, the level shift circuit 1234 shifts the amplitude of the clock signal CKp with the output voltage of the selection circuit 1233 and outputs it.

  Therefore, the output signal of the level shift circuit 1234 becomes a pulse signal in which the voltage sequentially rises in increments of 5V from 40V to 100V, and is output as the voltage signal TSb through the switch circuit 1235 that is turned on. The pulse voltage signal TSb is supplied as a test signal TSc1 to the closing coil of the circuit breaker 213 via the switch circuits 131 and 152 that are turned on. Then, the circuit breaker 213 performs an input operation according to the test signal TSc1. Each pulse width Tp of the test signal TSc1 is ½ of the cycle of the clock signal CKp, and is at least the reference cut operation time Ttht in the test mode 1 and the reference input operation time Tthc in the test mode 3. Yes.

  When the closing operation of the circuit breaker 213 is completed, each phase current I1 of the transmission line 31 is turned on again (at time t0 + t4 '). Further, the determination unit 18 obtains the minimum input operation voltage Vmc of the circuit breaker 213 from the count value CNT of the counter circuit 1232 when each phase current I1 is input (completion of the input operation). As an example, if the count value CNT at the completion of the on-operation is 2, the minimum on-operation voltage Vmc is 50V. And the determination part 18 performs the determination process of the state of the circuit breaker 213 based on the minimum input operation voltage Vmc.

  Note that the voltage signal generator 123 operates in the same manner in the test mode 2. In the operation time tests in the test modes 1 and 3, the voltage ramp selection signal is SLP = L, so that the voltage signal TSb is a constant voltage signal of 100V.

  As described above, in the test mode 2 (4) of the device monitoring device 1, the voltage signal TSb of the ramp voltage is supplied as the test signal TSt1 (TSc1) to the tripping coil (closing coil) of the circuit breaker 213, and the event signal EVb1 The minimum cut-off operation voltage Vmt (minimum on-operation voltage Vmc) is obtained on the basis of the above and compared with the reference cut-off operation voltage Vtht (reference on-operation voltage Vthc). The state of the vessel 213 can be determined and refractory movement can be detected early.

  In test mode 1 (3), a constant voltage signal TSb is supplied as a test signal TSt1 (TSc1) to the trip coil (closing coil) of the circuit breaker 213, and each phase current I1 By obtaining the cutting operation time for each of the three phases and comparing the difference between them with the reference time difference, it is possible to detect the unevenness of the operation for each phase of the circuit breaker 213.

  Furthermore, the state of the circuit breaker 213 can be determined by comparing the cut-off operation time Top (on-operation time Tcl) with the reference cut-off operation time Ttht (reference-on operation time Tthc).

  In test mode 5 (6), a constant current signal TSr is supplied as a test signal TSr1 to the relay 212, and an operation time Trl (Trh) is obtained based on the event signal EVr1, and a reference operation time Tthl (Tthh) is obtained. By comparing, the state of the relay 212 can be determined.

  Further, by outputting the test signal TS1 at the rising edge of the marker signal S0M indicating the timing of 0 second per minute, the operation time can be directly obtained by omitting the hour and minute from the operation completion time of the circuit breaker 213 or the relay 212. Can do.

  Further, by recording the value of the determination result signal JD for each operation test as time series data, the state of each cutoff circuit can be analyzed in detail using the time series data.

  In addition, in the equipment monitoring system shown in FIG. 2, by transmitting a determination result signal JD from the remote control slave station device 8 to the remote control master station device 9, the cutoff circuits 21 to 23 installed in the electric station are monitored. Therefore, it is possible to construct a highly reliable condition monitoring and maintenance system.

  In addition, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the above embodiment, the determination of irregularity is performed only in the test mode 1, but the present invention is not limited to this. Also in the test mode 3, by performing the determination of unevenness in the same manner as in the test mode 1, it is possible to detect the unevenness of the input operation for each phase of the circuit breaker.

  In the above embodiment, the device monitoring apparatus 1 includes the test modes 1 to 6, but is not limited to this. For example, when only the operation time tests of the test modes 1 and 3 are provided, the operation of each circuit of the circuit breaker is not uniform using the inexpensive voltage signal generator 123 that generates only the constant voltage signal TSb. Can be detected.

  In the above-described embodiment, each test mode uses the circuit breaker 213 or the relay 212 as an object of the operation test, but is not limited thereto. For example, the test signal TSr1 is supplied to the relay 212, and the operation time including the circuit breaker 213 from the rise of the test signal TSr1 (operation start of the relay 212) to the interruption of each phase current I1 (the circuit breaker 213 is turned off). It is also possible to perform a comprehensive operation test that compares the value with the reference operation time.

DESCRIPTION OF SYMBOLS 1 Equipment monitoring device 3 Bus 8 Remote control slave station device 9 Remote control master station device 11 Normal control part 12 Test control part 18 Judgment part 19 Recording part 21-23 Shutdown circuit 31-33 Transmission line (distribution line)
REFERENCE SIGNS LIST 121 interface section 122 clock section 123 voltage signal generation section 124 current signal generation section 131-133 switch circuit 141-143 switch circuit 151-153 switch circuit 181 storage section 212 relay 213 circuit breaker 214 current transformer 1231 clock generation circuit 1232 counter circuit 1233 Selection circuit 1234 Level shift circuit 1235, 1236 Switch circuit R0 to R12 Resistance

Claims (7)

Based on the remote control information input via the remote control device, the control signal for performing the open / close control of the interrupting circuit including the circuit breaker that opens and closes the electric line of the power system and interrupts the fault current of the electric line. A first control unit for outputting;
A second control unit that outputs a test signal for performing an operation test of the shut-off circuit based on the remote control information;
Based on an event signal indicating the operating state of the interrupting circuit, a determination unit that determines whether the interrupting circuit has operated with a predetermined performance according to the test signal;
Have
In the first mode, the second control unit supplies a voltage signal that gradually increases as the test signal to the trip coil or the closing coil of the circuit breaker,
In the first mode, the determination unit obtains a minimum operating voltage at which the circuit breaker operates according to the test signal based on the event signal, and the minimum operating voltage is less than a predetermined reference operating voltage. In this case, it is determined that the device has been operated with the predetermined performance. In the second mode, the second control unit supplies a predetermined constant voltage signal as the test signal to the tripping coil or the closing coil,
In the second mode, the determination unit obtains an operation time of the circuit breaker for each phase of the electric line according to the test signal based on the event signal, and the difference in the operation time is a predetermined reference The device monitoring apparatus according to claim 1, wherein when the time difference is equal to or greater than the time difference, it is determined that the device does not operate with the predetermined performance.   In the second mode, the determination unit is configured such that a difference in operating time of the circuit breaker with respect to each phase is less than the predetermined reference time difference, and the operating time is less than a first reference operating time. The device monitoring apparatus according to claim 2, wherein the device monitoring device determines that the device has operated with the predetermined performance. The breaking circuit further includes a relay that detects the fault current and causes the breaker to cut off the fault current,
In the third mode, the second control unit supplies a predetermined constant current signal as the test signal to the relay,
In the third mode, the determination unit obtains an operation time corresponding to the test signal of the relay based on the event signal, and the predetermined time when the operation time is less than a second reference operation time. The apparatus monitoring apparatus according to claim 3, wherein the apparatus monitoring apparatus determines that the apparatus has operated with the performance of the apparatus.   The second control unit includes a clock unit that outputs a marker signal indicating a timing of 0 seconds per minute, and outputs the test signal at the timing of the marker signal. 4. The device monitoring apparatus according to any one of 4.   6. The device monitoring apparatus according to claim 2, further comprising a recording unit that records a determination result of the determination unit as time-series data when the operation test is performed. The device monitoring device according to any one of claims 2 to 6,
The remote control device;
With
The remote control device comprises a master station and a slave station,
The master station transmits the remote control information to a slave station,
The slave station inputs the remote control information to the appliance monitoring apparatus and transmits a determination result of the determination unit to the master station.

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