JP5367045B2 - Control circuit inspection device and control circuit inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control circuit checking apparatus in which trouble in a control circuit and a DC power unit can be found easily without stopping the DC power unit and a load device, and a control circuit checking method. <P>SOLUTION: A control circuit checking apparatus 1 measures a test-time power supply voltage V0' at the side of a DC power unit 3 and a test-time load voltage V2' at the side of a load device 4 in timing t3 when it is determined that a power supply current I0' is matched to the sum of a normal-time power supply current I0 and a test current I2. On the basis of the test-time power supply voltage V0', the test-time load voltage V2' and resistance (resistance Rp and resistance Rn) of a control circuit, it is determined whether or not the control circuit and the DC power unit 3 normally operate. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a control circuit inspection device and a control circuit inspection method for inspecting a control circuit installed between a DC power supply device and a load device.

  Conventionally, a large number of load devices such as switchboards and circuit breakers are installed in power plants and substations, and a DC power supply device having a rectifier and a storage battery is installed as a power source for operating the load devices. In such power plants and substations, when a new load device such as a switchboard or equipment is installed, it is confirmed whether the power supply voltage is supplied to the newly installed load device. It is necessary to check the operation of the control circuit installed between the two.

  In general, when a load device such as a switchboard or equipment is newly installed, check that the control voltage is normally supplied to the newly installed load device with a voltmeter, and test the load device. The operation of the control circuit is confirmed by checking whether the operation of the control circuit is normal or not. As a technique for performing an operation check in such a power plant and a substation, for example, technologies such as Patent Documents 1 and 2 have been proposed.

JP 2003-255005 A JP 2007-155419 A

  Here, in the power supply related dividing board which connects the DC power supply device and the load apparatus, the load device is connected to the power supply related dividing board by a wiring connection part, a terminal block or the like. When checking the above control voltage with a voltmeter, the power supply voltage varies depending on the load current of the load device to be tested, and the connection between the wiring connection and terminal block etc. and the wiring from the load device If the wiring connection or terminal block and the wiring from the load device are in contact with each other even if the cable is loose (for example, loose screws or screws in the wiring connection or terminal block) The voltage is measured. Therefore, in the method of checking the control voltage with a voltmeter, it has been difficult to detect looseness (contact failure) between the wiring connection portion, the terminal block, and the like and the wiring from the load device.

  Another possible method is to connect a simulated load to a control circuit installed between the DC power supply device and the load device, and distribute the test current to check the control voltage. However, when the circuit breaker is operated by a simulated load, the supply of the power supply voltage to other devices not to be confirmed connected to the DC power supply device is stopped. For this reason, it has been generally difficult to implement the method of checking the control voltage with a simulated load.

  In addition, a simulated load is connected to a control circuit installed between the DC power supply device and the load device, and a test current is circulated for a short time (for example, several hundred msec) so that the circuit breaker does not operate. A method for confirming the control voltage is also conceivable. However, since the control circuit includes an element having a capacitance such as a switching power supply, the load current of the simulated load does not match the power supply current supplied from the power supply device. Furthermore, since the current waveform also varies greatly with time, the load current of the simulated load does not become the same current value from the DC power supply to the simulated load, and the resistance value of the control circuit cannot be measured correctly. It was.

  In this way, when a load device such as a distribution board or equipment is newly installed, the control circuit and the control circuit inspection device capable of discovering a defect in the control circuit and the DC power supply device without stopping the DC power supply device and the load device and A control circuit inspection method was desired.

  Accordingly, an object of the present invention is to provide a control circuit inspection device and a control circuit inspection method that can easily find out a problem of the control circuit and the DC power supply device without stopping the DC power supply device and the load device. To do.

  The present invention is a control circuit inspection device for inspecting a control circuit installed between a DC power supply device and a plurality of load devices, and a test for circulating a pulsed test current from a load device side to be inspected for a certain period of time. A current distribution unit, a power supply current measurement unit for measuring a power supply current on the DC power supply device side when the test current is distributed, and a power supply current on the DC power supply device side matches a sum of the steady-state power supply current and the test current A power supply current determination unit that determines whether the power supply current determination unit determines that the power supply current determination unit matches, a power supply device side measurement unit that measures a power supply voltage at the time of testing on the DC power supply device side at the timing determined to match, A load-side measuring unit for measuring a load voltage at the time of a test on the apparatus side, and the control circuit and the direct current based on the power supply voltage at the time of test, the load voltage at the time of test, and the resistance of the control circuit Source and apparatus motion determination section determines whether or not operating properly, a control circuit inspection device comprising a.

  According to the present invention, the control circuit inspection device includes the test power supply voltage on the DC power supply device side and the test load on the load device side at the timing when the power supply current is determined to match the sum of the steady power supply current and the test current. The voltage is measured, and it is determined whether or not the control circuit and the DC power supply are operating normally based on the test power supply voltage, the test load voltage, and the resistance of the control circuit.

  Therefore, the control circuit inspection device confirms that the control circuit and the DC power supply device are operating normally based on the test power supply voltage, the test load voltage, and the resistance of the control circuit without stopping the DC power supply device and the load device. It is possible to determine whether or not the control circuit and the DC power supply device are defective. For example, it is possible to easily grasp problems such as terminal tightening failure and wiring contact failure that cannot be grasped by voltage measurement performed in construction of newly installing a load device or construction of adding a load device. Further, by grasping the malfunction of the control circuit, for example, it can be determined whether or not the size of the wiring (electric wire, control cable, etc.) from the DC power supply device to the load device is appropriate.

  Furthermore, since the control circuit inspection device circulates a pulsed current as a test current for a certain period (for example, about 100 msec), for example, a malfunction of the control circuit installed between the DC power supply device and the load device (for example, , Etc.) can be prevented from occurring. In addition, for example, since it is possible to measure a voltage drop in a short time during operation of a load device such as a circuit breaker and a voltage value supplied to the load device, it is determined whether or not a control voltage condition required by the load device is satisfied. It can be determined, and malfunction of the load device can be prevented.

  Further, the control circuit inspection device includes an electronic load for generating the test current by the test current distribution unit, and a first connection that can be connected to an arbitrary position between the DC power supply device and the load device. It is preferable to include a master unit having a terminal and a slave unit having a second connection terminal connectable to the DC power supply device and capable of communicating with the master unit.

  According to the present invention, since the master unit can be connected to an arbitrary position between the DC power supply device and the load device, it is possible to measure at a partially limited position of the load device depending on the location where the master unit is connected. It becomes.

  In addition, the control circuit inspection device includes a period determination unit that determines whether or not a certain period has elapsed since the test current was passed, and a case in which the period determination unit determines that the certain period has elapsed. Preferably further includes a test current stop unit that stops the flow of the test current.

  According to the present invention, when it is determined that a certain period of time has elapsed, the flow of the test current is stopped, that is, the power supply current on the DC power supply side matches the sum of the steady-state power supply current and the test current. Therefore, the test power supply voltage and the test load voltage can be measured with high accuracy without stopping the DC power supply device and the load device.

  The control circuit inspection device further includes a warning information output unit that outputs warning information indicating that the control circuit and the DC power supply device are not operating normally. The DC power supply device includes a storage battery and a rectifier. And the operation determination unit determines whether or not the test power supply voltage at the timing measured by the power supply device side measurement unit is equal to or lower than a predetermined value, and the warning information output unit includes the operation determination unit When it is determined that the test power supply voltage at the timing is equal to or lower than the predetermined value, it is preferable to output first warning information indicating that the storage battery or the rectifier is not operating normally.

  According to the present invention, it is possible to find a failure of a storage battery (decrease in capacity, an increase in internal resistance of the storage battery, or the like) or a malfunction or failure of a rectifier from a test power supply voltage when a test current flows. .

  The operation determining unit determines whether the resistance of the control circuit is equal to or higher than a predetermined resistance value when the power supply voltage at the time of the test is larger than the predetermined value. Is greater than or equal to the predetermined resistance value, it is determined that the control circuit is not operating normally, and the warning information output unit determines that the control circuit is not operating normally by the operation determination unit. When it is determined, it is preferable to output second warning information indicating that the control circuit is not operating normally.

  According to the present invention, when the resistance of the control circuit is equal to or greater than a predetermined resistance value, it is determined that the control circuit is not operating normally, so that a malfunction of the control circuit can be easily found.

  The power supply device side measurement unit measures a power supply voltage at the time of testing at the positive electrode and the negative electrode of the DC power supply device, and the load side measurement unit measures a load voltage at the time of test at the positive electrode and the negative electrode of the load device. Is preferred.

  According to the present invention, since the test power supply voltage and the test load voltage of both the positive electrode and the negative electrode are measured, appropriate measurement is possible. For example, by calculating both the resistance of the control circuit on the positive electrode side and the resistance of the control circuit on the negative electrode side based on the power supply voltage during testing and the load voltage during testing in the positive electrode and the negative electrode, the control circuit resistances on the positive electrode side and the negative electrode side are calculated. Since it is possible to determine whether the location of the defect is high, that is, whether the defective portion is on the positive electrode side or the negative electrode side, the search time for the defective portion can be reduced.

  The present invention also relates to a control circuit inspection method for inspecting a control circuit installed between a DC power supply device and a load device by a control circuit inspection device, wherein a pulsed test current is applied from the load device side to be inspected. A test current distribution step for distributing for a certain period, a power supply current measuring step for measuring a power supply current on the DC power supply side when the test current is distributed, and a power supply current on the DC power supply side is a steady-state power supply current and the test current A power source current measuring step for determining whether or not the sum of the power source current, a power source side measuring step for measuring a test power source voltage on the DC power source side at a timing determined to match by the power source current determining step, A load-side measuring step of measuring a load voltage at the time of testing on the load device side at the timing; the power supply voltage at the time of testing; the load voltage at the time of testing Based on the resistance of the fine the control circuit, a control circuit inspection method and an operation determination step of determining whether said control circuit and said direct current power supply is operating normally.

  ADVANTAGE OF THE INVENTION According to this invention, the control circuit inspection apparatus and control circuit inspection method which can discover the malfunction of a control circuit and a DC power supply device easily can be provided, without stopping a DC power supply device and a load apparatus.

It is a figure which shows the structure of the control circuit inspection apparatus which concerns on one Embodiment of this invention. It is a functional block diagram which shows the function of the control part of the control circuit inspection apparatus which concerns on this embodiment, and a control part. It is a graph which shows a test current. It is a graph which shows the ideal electric current value at the time of distribute | circulating a test current in the state in which the power supply current in the regular time is distribute | circulating. It is a graph which shows the electric current value at the time of distribute | circulating a test current in the state in which the power supply current is distribute | circulating in the steady state, when inspecting a control circuit with the control circuit inspection apparatus which concerns on this embodiment. It is a graph which shows the electric current value at the time of distribute | circulating the simulated load current to the control circuit installed between the DC power supply device and the load device. It is a flowchart shown about the control circuit inspection process of the control circuit inspection apparatus which concerns on this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a control circuit inspection device 1 according to an embodiment of the present invention. As shown in FIG. 1, the control circuit checking device 1 includes a DC power supply device 3 for checking a control circuit (not shown) at an arbitrary position installed between the DC power supply device 3 and the load device 4. And the load device 4. A large number of loads (not shown) are connected between the DC power supply device 3 and the load device 4, and a control circuit at an arbitrary position is constituted by these loads.

The control circuit inspection device 1 includes a parent device 1a and a child device 1b.
The base unit 1 a includes a control unit 10, a storage unit 11, a display unit 12, a communication unit 13, an AD converter 14, an electronic load 15, an interface circuit 16, and a connection terminal 17.
The subunit | mobile_unit 1b is provided with the control part 18, the communication part 19, AD converter 20, the interface circuit 21, clamp CT (Current Transformer) 23, and the connection terminal 24. FIG.

  The control unit 10 is constituted by, for example, a microprocessor (MPU) or the like, and controls the entire master unit 1a. Moreover, the control part 10 controls the control circuit inspection apparatus 1 in cooperation with the control part 18 of the subunit | mobile_unit 1b mentioned later.

  The memory | storage part 11 is comprised by a non-volatile memory etc., for example, and memorize | stores the program for operating the control circuit inspection apparatus 1, various information, etc. The storage unit 11 may store voltage values, current values, resistance values, and the like of the control circuit measured in the past. As a result, the voltage value, current value, resistance value, etc. of the control circuit measured in the past are compared with the voltage value, current value, resistance value, etc. of the control circuit measured this time, and the signs of the malfunction of the control circuit are grasped. be able to.

  The display unit 12 includes, for example, an LCD (Liquid Crystal Display) panel and displays various types of information. Specifically, the display unit 12 displays operation information for operating the control circuit inspection device 1, a measurement result described later, a calculated result, warning information, and the like according to the control of the control unit 10.

The communication unit 13 includes a communication circuit that performs wired or wireless communication, and communicates with the child device 1b.
The AD converter 14 converts an analog signal such as a measured voltage or current into a digital signal and outputs the digital signal to the control unit 10.
The electronic load 15 operates at a high speed so that a constant current flows even when the voltage changes.

The interface circuit 16 connects the control unit 10, the display unit 12, the communication unit 13, the AD converter 14, and the electronic load 15 to each other.
The connection terminal 17 is configured by a detachable terminal and can be connected to the load device 4 side between the DC power supply device 3 and the load device 4. The connection terminal 17 mainly measures a positive ground voltage and a negative ground voltage (hereinafter simply referred to as a positive voltage and a negative voltage) on the load device 4 side (load device end).

  The control part 18 is comprised by the microprocessor (MPU) etc., for example, and controls the whole subunit | mobile_unit 1b. Moreover, the control part 18 controls the control circuit inspection apparatus 1 in cooperation with the control part 10 of the above-mentioned main | base station 1a.

The communication unit 19 includes a communication circuit that performs wired or wireless communication, and communicates with the parent device 1a. When the communication unit 13 and the communication unit 19 perform wired communication, the communication unit 13 and the communication unit 19 are connected to each other by a communication cable 22.
The AD converter 20 converts analog signals such as measured voltages and currents into digital signals and outputs them to the control unit 18.

The interface circuit 21 connects the control unit 18, the communication unit 19, and the AD converter 20 to each other.
The clamp CT23 has a shape that can be sandwiched (clamped) with respect to a wiring (for example, a wiring on the DC power supply device 3 side) whose one end is a connection destination, and is configured to be detachable from the wiring. The clamp CT23 mainly measures the power supply current on the DC power supply device 3 side.
The connection terminal 24 is composed of a detachable terminal and is connected to the wiring on the DC power supply device 3 side. The connection terminal 24 mainly measures a positive voltage and a negative voltage on the DC power supply device 3 side (DC power supply device end).

  The DC power supply device 3 includes a rectifier 31, a storage battery 32, a rectifier MCCB (Molded Case Circuit Breaker) 33, control MCCBs 34a and 34b, and connection portions 35a and 35b.

The rectifier 31 is connected to the rectifier MCCB33, and the rectifier MCCB33 is connected to the control MCCB 34a through the connection portion 35a.
The storage battery 32 is connected to the control MCCB 34b via the connection portion 35b. The connection part 35b is connected to the connection part 35a. In addition, other connection parts (not shown), control MCCB, and the like are connected to the connection part 35b.

The load device 4 is a load device to be inspected provided in the control circuit, and includes a switchboard 41 and a device 42.
The power distribution board 41 is connected to the power supply related division board 5 by the connection part 51 c of the power supply related division board 5. Here, the connection parts 51a, 51b, 51c of the power supply related division board 5 are composed of wiring connection parts, terminal blocks, and the like. Moreover, the connection parts 51a and 51b connect the DC power supply device 3 and other existing equipment (not shown). At this time, the other device includes an electronic device having a capacitance such as a switching power supply.

The device 42 is an arbitrary electrical device and is connected to the switchboard 41.
In addition, as shown in FIG. 1, in a steady state, a power supply current I0 flows from the DC power supply device 3, and a current I1x is supplied to each of the load device 4 connected to the power supply related division board 5 and other existing devices. Circulate.

FIG. 2 is a functional block diagram illustrating functions of the control unit 10 and the control unit 18 of the control circuit inspection device 1 according to the present embodiment.
As shown in FIG. 2, the control unit 10 includes a test current distribution unit 101, a load side measurement unit 102, a power supply current determination unit 103, a period determination unit 104, a test current stop unit 105, and a calculation unit 106. The operation determination unit 107 and the warning information output unit 108 are provided.
The control unit 18 includes a power supply current measurement unit 181 and a power supply device side measurement unit 182.

  The test current distribution unit 101 distributes a pulsed test current I2 from the load device 4 side to be inspected for a certain period (t2-t1). Specifically, as shown in FIG. 3, the test current circulating unit 101 circulates the pulsed test current I2 for a certain period (t2-t1). Note that the certain period (t2-t1) is preferably about several hundred msec.

The load side measuring unit 102 measures the positive voltage Vp2 and the negative voltage Vn2 on the load device 4 side in a steady state.
Further, the load side measuring unit 102 is on the load device 4 side at the timing t3 when the power supply current I0 ′ on the DC power supply device 3 side matches the sum of the steady-state power supply current I0 and the test current I2 (I0 ′ = I0 + I2). The positive voltage Vp2 ′ and the negative voltage Vn2 ′ are measured, and the test load voltage V2 ′ on the load device 4 side at the timing t3 is measured from the positive voltage Vp2 ′ and the negative voltage Vn2 ′. Here, the test load voltage V2 ′ is a difference (V2 ′ = Vp2′−Vn2 ′) between the positive voltage Vp2 ′ and the negative voltage Vn2 ′ on the load device 4 side at the timing t3.

The power source current determination unit 103 determines whether or not the power source current I0 ′ on the DC power source device 3 side when the test current flows matches the sum of the steady state power source current I0 and the test current I2, that is, the power source current I0 ′ = (constant It is determined whether or not the constant power supply current I0 + the test current I2). At this time, the timing at which the power supply current determination unit 103 determines that they match is the timing t3 in the present embodiment.
The determination by the power supply current determination unit 103 may be performed by receiving the power supply current I0 ′ from the slave unit 1b via the communication units 13 and 19, and the slave unit via the communication units 13 and 19 It may be performed by receiving a matching instruction from 1b. That is, the calculation of the power supply current I0 ′ = (the steady-state power supply current I0 + the test current I2) may be performed in the parent device 1a or may be performed in the child device 1b. At this time, when power supply current I0 ′ = (steady-state power supply current I0 + test current I2) is calculated in slave unit 1b, it is preferable to notify only the calculation result (coincidence instruction).

The period determination unit 104 determines whether or not a certain period (t2-t1) has elapsed since the test current I2 was circulated.
The test current stop unit 105 stops the flow of the test current I2 when the period determination unit 104 determines that the certain period (t2-t1) has elapsed. For example, the test current stop unit 105 stops the flow of the test current I2 by stopping the electronic load 15 or the like.

  The calculation unit 106 calculates the positive side voltage drop Vp and the negative side voltage drop Vn in the steady state. Here, the positive side voltage drop Vp is obtained from the difference (Vp = Vp1−Vp2) between the positive voltage Vp1 on the DC power supply device 3 side and the positive voltage Vp2 on the load device 4 side. The negative voltage drop Vn is obtained from the difference (Vn = Vn1−Vn2) between the negative voltage Vn1 on the DC power supply device 3 side and the negative voltage Vn2 on the load device 4 side.

  In addition, the calculation unit 106 calculates the power supply voltage V0 and the load voltage V2 at the normal time. Here, the power supply voltage V0 in the steady state is obtained from the difference (V0 = Vp1−Vn1) between the positive voltage Vp1 on the DC power supply 3 side and the negative voltage Vn1 in the steady state. The load voltage V2 at a constant time is obtained from the difference (V2 = Vp2−Vn2) between the positive voltage Vp2 on the load device 4 side and the negative voltage Vn2 at the normal time.

  Further, the calculation unit 106 calculates the positive voltage drop Vp ′ and the negative voltage drop Vn ′ at the timing t3. Here, the positive voltage drop Vp ′ is obtained from the difference (Vp ′ = Vp1′−Vp2 ′) between the positive voltage Vp1 ′ on the DC power supply device 3 side and the positive voltage Vp2 ′ on the load device 4 side. The negative voltage drop Vn ′ is obtained from the difference (Vn ′ = Vn1′−Vn2 ′) between the negative voltage Vn1 ′ on the DC power supply device 3 side and the negative voltage Vn2 ′ on the load device 4 side.

  The calculating unit 106 calculates the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit. Here, a large amount of current that flows to other than the load device 4 to be inspected is superimposed on the power supply current I0 in the steady state. For this reason, the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit cannot be calculated from the power supply current I0 in the steady state and the power supply voltage V0 in the steady state. Therefore, the calculation unit 106 obtains the resistance Rp of the control circuit on the positive electrode side using the difference between the voltage drop Vp on the positive electrode side in the steady state and the voltage drop Vp ′ on the positive electrode side at the timing t3 as a voltage drop due to the test current I2.

Specifically, the resistance Rp of the positive control circuit is obtained from a value (Rp = (Vp′−Vp) / I2) obtained by dividing the voltage drop (Vp′−Vp) due to the test current I2 by the test current I2. .
Similarly, the resistance Rn of the negative-side control circuit is obtained from the value (Rn = (Vn′−Vn) / I2) obtained by dividing the voltage drop (Vn′−Vn) due to the test current I2 by the test current I2.

  The operation determination unit 107 is based on the test current I2, the test power supply voltage V0 ′, the test load voltage V2 ′, and the resistance of the control circuit (the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit). Then, it is determined whether or not the control circuit and the DC power supply device 3 are operating normally.

  Specifically, the operation determination unit 107 determines whether or not the test power supply voltage V0 ′ at the timing t3 is equal to or lower than a predetermined value.

  Further, when the test power supply voltage V0 ′ at timing t3 is greater than a predetermined value, the operation determination unit 107 determines that the resistance of the control circuit (the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit) is It is determined whether or not a predetermined resistance value is exceeded. The operation determining unit 107 determines that the control circuit is not operating normally when the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit are each equal to or greater than a predetermined resistance value. . For example, when the resistance Rp of the positive control circuit is greater than or equal to a predetermined resistance value and the resistance Rn of the negative control circuit is less than the predetermined resistance value, the operation determination unit 107 determines that the positive side of the control circuit is It is determined that it is not operating normally.

  In addition, the operation determination unit 107 sets the test current I2 to a value at which the circuit breaker constituting the control circuit has the minimum allowable voltage by the test current distribution unit 101, and then sets the resistance Rp and the resistance Rp of the positive-side control circuit. It may be determined whether each resistance Rn of the control circuit on the negative electrode side is equal to or higher than a predetermined resistance value. The operation determination unit 107 sets a difference between the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit in advance as a condition for determining whether the control circuit is operating normally. It may be determined whether or not the control circuit is operating normally by determining whether or not it is within the specified range.

  The warning information output unit 108 outputs warning information indicating that the control circuit and the DC power supply device 3 are not operating normally. Specifically, the warning information output unit 108 operates normally when the rectifier 31 or the storage battery 32 operates normally when the operation determination unit 107 determines that the test power supply voltage V0 ′ at the timing t3 is equal to or lower than a predetermined value. 1st warning information which shows not having been output. The warning information output unit 108 outputs second warning information indicating that the control circuit is not operating normally when the operation determining unit 107 determines that the control circuit is not operating normally. To do.

  The power supply current measuring unit 181 measures the power supply current I0 on the DC power supply device 3 side in a steady state. The power supply current measuring unit 181 measures the power supply current I0 'on the DC power supply device 3 side when the test current I2 is distributed. Then, the power source current measuring unit 181 transmits the measured values of the power source current I0 and the power source current I0 'to the parent device 1a through the communication unit 19.

  The power supply device side measuring unit 182 measures the positive voltage Vp1 and the negative voltage Vn1 on the DC power supply device 3 side in a steady state. Further, the power supply device side measuring unit 182 measures the positive voltage Vp1 'and the negative voltage Vn1' on the DC power supply device 3 side when the test current I2 flows.

  Further, the power supply device side measuring unit 182 measures the test power supply voltage V0 'on the DC power supply device 3 side at the timing t3. Here, the test power supply voltage V0 ′ is the difference between the positive voltage Vp1 ′ on the DC power supply 3 side when the test current flows and the negative voltage Vn1 ′ on the DC power supply 3 side when the test current I2 flows (V0 ′ = Vp1′−Vn1 ′). Then, the power supply device side measurement unit 182 transmits the measured values of the positive voltage Vp1 and the negative voltage Vn1, the positive voltage Vp1 ′ and the negative voltage Vn1 ′, and the test power supply voltage V0 ′ to the parent device 1a through the communication unit 19. To do.

  Next, the operation principle of the control circuit inspection device 1 according to the present embodiment will be described with reference to FIGS. FIG. 3 is a graph showing the test current I2. FIG. 4 is a graph showing an ideal current value when the test current I2 is circulated in a state where the power supply current I0 circulates in a steady state. FIG. 5 shows the current value when the test current I2 is circulated while the power supply current I0 is circulated when the control circuit is inspected by the control circuit inspection device 1 according to the present embodiment. It is a graph.

  As shown in FIG. 3, the waveform of the test current I2 circulated by the test current circulator 101 is a pulsed square wave. Therefore, the ideal waveform of the power supply current I0 ′ when the test current I2 is circulated while the power supply current I0 is circulated is a square waveform of the test current I2 as shown in FIG. The shape is a wave superimposed.

  However, since many loads (including electronic devices having capacitance) other than the load device 4 to be inspected are connected to the control circuit, the test current I2 is in a state where the power supply current I0 is in circulation. When the current is distributed, the actual waveform of the power supply current I0 ′ does not have the shape as shown in FIG. 4, and the current changes excessively as shown in FIG.

  Specifically, as shown in FIG. 5, when the test current distribution unit 101 starts distribution of the test current I2 at time t1, the test current gradually increases with the passage of time by the electronic load 15 (time t1 in FIG. 5). To t3). Then, when the electronic load 15 is stopped by the test current stop unit 105 (time t2), the voltage applied to the capacitor of the control circuit and the like rises due to the interruption of the test current, so that the charging current flows through the capacitance and the test is performed. The current increases rapidly (after time t2 in FIG. 5). Note that the degree of current increase and the state of current change do not have a uniform waveform depending on the form of the connected load, the degree of deterioration of the storage battery 32, the characteristics of the rectifier 31, and the like.

  However, at the timing t3 when the value obtained by adding the test current I2 to the power supply current I0 in the steady state becomes equal to the actually measured power supply side current, there is no influence of the capacitor of the control circuit, and the voltage drop due to only the electronic load 15 occurs. It can be said that it is the timing when it occurred. Therefore, the control circuit inspection device 1 according to the present embodiment is configured to measure the power supply current, the power supply voltage, and the load voltage at the timing t3. Thereby, the control circuit inspection apparatus 1 can perform an accurate evaluation of the control circuit.

FIG. 6 is a simulation of a control circuit installed between the DC power supply device 3 and the load device 4 in order to verify the operation when the test current I2 is passed through the control circuit inspection device 1 according to the present embodiment. It is a graph which shows the electric current value at the time of distribute | circulating load current.
As shown in FIG. 6, about 7.6 A of current flows before operating the simulated load. When the simulated load is operated, the current does not increase only for the current waveform (square wave) of the simulated load, but after an excessive phenomenon occurs in the initial stage, the current gradually increases, and when t3 time has elapsed. It can be seen that it is the sum of the load current at the constant time and the simulated load current.

  FIG. 7 is a flowchart showing the control circuit inspection process of the control circuit inspection device 1 according to the present embodiment.

  In step S1, the power supply device side measuring unit 182 measures the positive voltage Vp1 and the negative voltage Vn1 on the DC power supply device 3 side in a steady state. In addition, the load side measurement unit 102 measures the positive voltage Vp2 and the negative voltage Vn2 on the load device 4 side in a steady state. Further, the power supply current measuring unit 181 measures the power supply current I0 on the DC power supply device 3 side in the steady state.

  In step S2, the test current distribution unit 101 distributes the pulsed test current I2 from the load device 4 side to be inspected for a certain period (t2-t1).

  In step S3, the power supply current measuring unit 181 measures the power supply current I0 'on the DC power supply device 3 side when the test current I2 flows (t2-t1).

  In step S4, it is determined whether or not the power supply current I0 'on the DC power supply device 3 side when the test current flows (t2-t1) matches the sum of the steady-state power supply current I0 and the test current I2. If the power supply current I0 ′ on the DC power supply 3 side at the time of test current distribution (t2−t1) matches the sum of the steady-state power supply current I0 and the test current I2 (YES: timing t3), the process proceeds to step S8. . If the power supply current I0 'on the DC power supply 3 side at the time of test current distribution (t2-t1) does not match the sum of the steady-state power supply current I0 and the test current I2 (NO), the process proceeds to step S5.

  In step S5, the period determination unit 104 determines whether or not a certain period (t2-t1) has elapsed since the test current I2 was distributed. If the predetermined period (t2-t1) has elapsed (YES), the process proceeds to step S6. If the predetermined period (t2-t1) has not elapsed (NO), the process returns to step S3.

  In step S6, the test current stop unit 105 stops the flow of the test current I2 (test current I2 = 0).

  In step S7, the warning information output unit 108 displays warning information indicating that the measurement has failed on the display unit 12, and ends the process.

  In step S8, the power supply device side measuring unit 182 measures the positive voltage Vp1 'and the negative voltage Vn1' on the DC power supply device 3 side at the timing t3. Further, the load side measuring unit 102 measures the positive voltage Vp2 'and the negative voltage Vn2' on the load device 4 side at the timing t3.

  In step S9, the test current stop unit 105 stops the flow of the test current I2 (test current I2 = 0).

  In step S10, the power supply device side measuring unit 182 measures the test power supply voltage V0 'on the DC power supply device 3 side at the timing t3. Further, the load side measuring unit 102 measures the test load voltage V2 'on the load device 4 side at the timing t3. The calculating unit 106 calculates the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit.

  In step S11, the control unit 10 causes the display unit 12 to display the test power supply voltage V0 ', the test load voltage V2', the resistance Rp of the positive control circuit, and the resistance Rn of the negative control circuit.

  In step S <b> 12, the operation determination unit 107 determines whether or not the test power supply voltage V <b> 0 ′ at the timing t <b> 3 measured by the power supply device side measurement unit 182 is equal to or lower than a predetermined value. If the test power supply voltage V0 'is equal to or lower than the predetermined value (YES), the process proceeds to step S13. If the test power supply voltage V0 'is less than the predetermined value (NO), the process proceeds to step S14.

  In step S13, the warning information output unit 108 outputs first warning information indicating that the rectifier 31 or the storage battery 32 is not operating normally, and ends the process.

  In step S14, the operation determination unit 107 determines that the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit have predetermined resistance values when the test power supply voltage V0 ′ at timing t3 is greater than the predetermined value. It is determined whether it is above. Then, the operation determination unit 107 determines that the control circuit is not operating normally when each of the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit is equal to or greater than a predetermined resistance value. The process is terminated.

  In step S15, the warning information output unit 108 outputs second warning information indicating that the control circuit is not operating normally, and ends the process.

  As described above, according to the control circuit inspection device 1 according to the present embodiment, the following effects can be obtained.

  The control circuit checking device 1 determines that the power supply current I0 ′ is equal to the sum of the steady-state power supply current I0 and the test current I2, and the test power supply voltage V0 ′ on the DC power supply 3 side and the load device 4 side at the timing t3. The test load voltage V2 ′ is measured, and the control circuit and the DC power supply 3 are normally operated based on the test power supply voltage V0 ′, the test load voltage V2 ′, and the resistance of the control circuit (resistance Rp and resistance Rn). Determine whether it is operating.

  Therefore, the control circuit inspection device 1 does not stop the DC power supply device 3 and the load device 4, but based on the test power supply voltage V0 ′, the test load voltage V2 ′, and the resistance of the control circuit (resistance Rp and resistance Rn). Therefore, it is possible to determine whether or not the control circuit and the DC power supply device 3 are operating normally, so that the malfunction of the control circuit and the DC power supply device 3 can be easily found. For example, it is possible to easily grasp defects such as terminal tightening failure and wiring contact failure that cannot be grasped by voltage measurement performed in construction of newly installing the load device 4 or construction of adding the load device 4. Further, by grasping the malfunction of the control circuit, for example, it can be determined whether or not the size of the wiring (electric wire, control cable, etc.) from the DC power supply device 3 to the load device 4 is appropriate.

  Furthermore, since the control circuit inspection device 1 circulates a pulsed current as the test current I2 for a certain period (for example, about 100 msec), for example, a control circuit installed between the DC power supply device 3 and the load device 4 Can be prevented from occurring (for example, the circuit breaker for wiring is interrupted). In addition, for example, since the voltage drop in a short time during operation of the load device 4 such as a circuit breaker and the voltage value supplied to the load device 4 can be measured, the control voltage condition required by the load device 4 is satisfied. It is possible to determine whether or not the load device 4 is malfunctioning.

  Further, the control circuit inspection device 1 includes an electronic load 15 for generating the test current I2 by the test current distribution unit 101, and a connection terminal 17 that can be connected to an arbitrary position between the DC power supply device 3 and the load device 4. And a slave unit 1b having a clamp CT 23 and a connection terminal 24 that can be connected to the DC power supply device 3 and capable of communicating with the master unit 1a.

  As a result, the control circuit inspection device 1 can connect the parent device 1a to an arbitrary position between the DC power supply device 3 and the load device 4, so that the load circuit 4 can be partially connected depending on the location where the parent device 1a is connected. Measurement at a limited position is possible.

  The control circuit inspection device 1 includes a period determination unit 104 that determines whether or not a certain period (t2-t1) has elapsed since the test current I2 was passed, and the period determination unit 104 determines the certain period (t2-t1). And a test current stop unit 105 that stops the flow of the test current I2 when it is determined that the test has passed.

  Thereby, when it is determined that the predetermined period (t2-t1) has elapsed, the control circuit inspection device 1 stops the flow of the test current I2, that is, the power source current I0 ′ on the DC power source device 3 side is reduced. Since the measurement is repeatedly performed until the sum of the power supply current I0 and the test current I2 in a steady state is reached, the test power supply voltage V0 ′ and the test load voltage are maintained without stopping the DC power supply device 3 and the load device 4. V2 ′ can be measured with high accuracy.

  Further, the operation determination unit 107 determines whether or not the test power supply voltage V0 ′ at the timing t3 measured by the power supply device side measurement unit 182 is equal to or lower than a predetermined value, and the warning information output unit 108 includes an operation determination unit. If it is determined by 107 that the test power supply voltage V0 ′ at timing t3 is equal to or lower than a predetermined value, first warning information indicating that the rectifier 31 or the storage battery 32 is not operating normally is output.

  As a result, the control circuit inspection device 1 causes the test power supply voltage V0 ′ at the timing t3 to be defective in the storage battery 32 constituting the DC power supply device 3 (decrease in capacity, increase in internal resistance of the storage battery 32, etc.) or malfunction of the rectifier 31. And can find defects.

  When the test power supply voltage V0 ′ at the timing t3 is greater than a predetermined value, the operation determination unit 107 determines that the resistance Rp of the positive-side control circuit and the resistance Rn of the negative-side control circuit are each greater than or equal to a predetermined resistance value. Determine whether or not. The operation determination unit 107 determines that the control circuit is not operating normally when the resistance Rp of the control circuit and the resistance Rn of the negative control circuit are equal to or greater than a predetermined resistance value. When the operation determination unit 107 determines that the control circuit is not operating normally, the warning information output unit 108 outputs second warning information indicating that the control circuit is not operating normally.

  Thereby, the control circuit inspection device 1 determines that the control circuit is not operating normally when the resistance Rp of the control circuit and the resistance Rn of the negative control circuit are equal to or greater than a predetermined resistance value. The trouble of the control circuit can be easily found.

  The power supply side measurement unit 182 measures the positive voltage Vp1 ′ and the negative voltage Vn1 ′ at the positive electrode and the negative electrode of the DC power supply device 3, and the load side measurement unit 102 measures the positive voltage Vp2 at the positive electrode and the negative electrode of the load device 4. 'And negative electrode voltage Vn2' are measured.

  Thereby, since the control circuit inspection apparatus 1 measures the positive electrode voltage Vp1 ', the negative electrode voltage Vn1', the positive electrode voltage Vp2 ', and the negative electrode voltage Vn2' for both the positive electrode and the negative electrode, appropriate measurement is possible. For example, by calculating both the resistance Rp of the positive control circuit and the resistance Rn of the negative control circuit based on the positive voltage Vp1 ′, the negative voltage Vn1 ′, the positive voltage Vp2 ′, and the negative voltage Vn2 ′, Since it is possible to determine whether the resistance Rp and the resistance Rn of the control circuit on the side and the negative side are high, that is, whether the defective part is on the positive electrode side or the negative electrode side, the search time for the defective part can be shortened. .

  As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

DESCRIPTION OF SYMBOLS 1 Control circuit inspection apparatus 1a Master machine 1b Slave machine 3 DC power supply device 4 Load apparatus 10 Control part 11 Memory | storage part 12 Display part 13 Communication part 14 AD converter 15 Electronic load 16 Interface circuit 17 Connection terminal 18 Control part 19 Communication part 20 AD Converter 21 Interface circuit

Claims (7)

A control circuit inspection device for inspecting a control circuit installed between a DC power supply device and a plurality of load devices,
A test current distribution section for circulating a pulsed test current for a certain period from the load device side to be inspected;
A power supply current measuring unit for measuring a power supply current on the DC power supply device side when a test current flows;
A power supply current determination unit for determining whether or not the power supply current on the DC power supply device side matches the sum of the steady-state power supply current and the test current;
A power supply device side measurement unit that measures a power supply voltage at the time of testing on the DC power supply device side at a timing determined to be coincident by the power supply current determination unit;
A load side measurement unit for measuring a load voltage at the time of the test on the load device side at the timing;
A control circuit comprising: an operation determining unit that determines whether or not the control circuit and the DC power supply device are normally operating based on the test power supply voltage, the test load voltage, and the resistance of the control circuit; Inspection device. The control circuit inspection device is
A main unit having an electronic load for generating the test current by the test current distribution unit, and a first connection terminal connectable to an arbitrary position between the DC power supply device and the load device;
The control circuit inspection device according to claim 1, further comprising: a slave unit having a second connection terminal connectable to the DC power supply device and capable of communicating with the master unit. A period determination unit that determines whether or not a certain period of time has passed since the test current was distributed;
The control circuit inspection device according to claim 1, further comprising: a test current stop unit that stops the flow of the test current when the period determination unit determines that the certain period has elapsed. A warning information output unit that outputs warning information indicating that the control circuit and the DC power supply device are not operating normally;
The DC power supply device has a storage battery and a rectifier,
The operation determination unit determines whether or not the test power supply voltage at the timing measured by the power supply device side measurement unit is a predetermined value or less,
The warning information output unit indicates that the storage battery or the rectifier is not operating normally when the operation determination unit determines that the power supply voltage at the time of the test is equal to or lower than a predetermined value. The control circuit inspection device according to any one of claims 1 to 3, wherein the warning information is output. The operation determining unit determines whether or not the resistance of the control circuit is equal to or higher than a predetermined resistance value when the power supply voltage at the time of the test of the timing is higher than a predetermined value. If the resistance value is greater than or equal to, determine that the control circuit is not operating normally,
The warning information output unit outputs second warning information indicating that the control circuit is not operating normally when the operation determination unit determines that the control circuit is not operating normally. The control circuit inspection device according to claim 4. The power supply device side measurement unit measures a test power supply voltage at a positive electrode and a negative electrode of the DC power supply device,
The control circuit inspection device according to any one of claims 1 to 5, wherein the load-side measuring unit measures a load voltage at the time of a test at a positive electrode and a negative electrode of the load device. A control circuit inspection method for inspecting a control circuit installed between a DC power supply device and a load device with a control circuit inspection device,
A test current distribution step for circulating a pulsed test current for a certain period from the load device side to be inspected;
A power source current measuring step for measuring a power source current on the side of the DC power source device when a test current flows; and
A power supply current determination step for determining whether or not the power supply current on the DC power supply side matches the sum of the steady-state power supply current and the test current;
A power supply device side measurement step for measuring a power supply voltage during a test on the DC power supply device side at a timing determined to be coincident by the power supply current determination step;
A load-side measuring step of measuring a load voltage at the time of testing on the load device side at the timing;
A control circuit comprising: an operation determining step for determining whether or not the control circuit and the DC power supply device are operating normally based on the test power supply voltage, the test load voltage, and the resistance of the control circuit; Inspection method.

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