Device and method for monitoring pole-mounted switch opening and closing operation control loop

Abstract

The invention discloses a monitoring device and method for a pole-mounted switch opening and closing operation control loop. The monitoring device comprises a KK handle and a monitoring input circuit. A common end of the change-over switch is connected with a positive power supply of the switch operation mechanism. A normally open contact output end of the change-over switch is connected with a normally closed contact input common end of the KK handle and the first monitoring input circuit. The normally closed contact output end of the change-over switch is connected with the KK handle normally open contact input common end and the second monitoring input circuit. The output end of a manual closing normally open contact of the KK handle is connected with the positive electrode of a closing relay magnet exciting coil and a third monitoring input circuit. The output end of an automatic opening and closing normally-closed contact of the KK handle is connected with a protection preset opening and closing device, a remote control preset opening and closing device and a fourth monitoring input circuit. And the output end of a manual opening normally open contact in the KK handle is respectively connected with the positive electrode of an excitation coil of the opening relay and a fifth monitoring input circuit. According to the invention, each key node of the opening and closing operation control loop can be monitored in real time.

Description

Technical Field

[0001] The present invention relates to the field of switch control in pole-mounted switches in the power distribution industry, and more specifically, to a monitoring device and method for a control circuit of a pole-mounted switch opening and closing operation. Background Art

[0002] At present, the front-end control design of the pole-mounted switch operating mechanism has the opening circuit and closing circuit connected in series with a switching switch and a KK handle at the front end, which has the functions of manual opening and manual closing.

[0003] The switch operation's opening and closing control mechanism and control circuit, switching switch, KK handle, opening and closing preset status do not have real-time monitoring functions for key nodes. In the event of a circuit breaker or logic error, the opening and closing logic will be confused, leading to the risk of false operation and refusal to operate.

[0004] In the prior art, the devices or methods for monitoring the opening and closing operation control circuit of the pole-mounted switch mainly include: Prior art document 1 (CN109884521B) proposes a circuit breaker opening and closing control circuit disconnection monitoring alarm circuit, which publicly designs a method for using the auxiliary contacts of the circuit breaker to monitor the light; Prior art document 2 (CN220040680U) proposes a fault monitoring circuit for vulnerable parts in a high-voltage switch control circuit, which designs a method for using series-parallel auxiliary relays to perform power-on monitoring on vulnerable parts in the switch control circuit by using the auxiliary relay contacts on and off; Prior art document 3 proposes a DC switch opening and closing circuit monitoring device (CN116840674A), which designs a method for monitoring the state of the switch control circuit by connecting a relay or an optocoupler in series in the main circuit of the switch control circuit.

[0005] The above-mentioned prior arts all directly or indirectly adopt the auxiliary relay optocoupler in parallel or in series in the main circuit and key components to obtain the solution of the switch control circuit, which has at least the following technical problems:

[0006] 1. Auxiliary relays or optocouplers are connected in series in the main circuit. Failure of the auxiliary components or optocouplers will cause failure of the main circuit of the opening and closing switch, reducing the reliability of the opening and closing control circuit;

[0007] 2. The use of auxiliary relays to monitor the opening and closing control circuit increases the difficulty of implementation. Since there are many monitoring locations, the large volume after implementation is not conducive to compact installation;

[0008] 3. The monitoring results are displayed using lights, which is not conducive to an unattended working environment. Summary of the invention

[0009] In order to solve the deficiencies in the prior art, the present invention provides a monitoring device for a pole-mounted switch opening and closing operation control circuit, which can solve the problem of lack of real-time monitoring of key nodes of the pole-mounted switch opening and closing operation control circuit in the prior art.

[0010] The present invention adopts the following technical solution.

[0011] A monitoring device for a control circuit of a pole-mounted switch opening and closing operation, comprising: a KK handle and a monitoring input circuit;

[0012] Among them, the common end of the switching switch is connected to the positive power supply of the switch operating mechanism, and the normally open contact output end of the switching switch is connected to the normally closed contact input common end of the KK handle and the first monitoring input circuit respectively;

[0013] The normally closed contact output terminal of the switch is connected to the normally open contact input common terminal of the KK handle and the second monitoring input circuit respectively;

[0014] The output end of the manual closing normally open contact of the KK handle is connected to the positive pole of the closing relay excitation coil and the third monitoring input circuit respectively;

[0015] The automatic opening and closing normally closed contact output terminals of the KK handle are respectively connected to the protection preset opening and closing, remote control preset opening and closing, and the fourth monitoring input circuit;

[0016] The manual opening normally open contact output terminal in the KK handle is respectively connected to the positive pole of the opening relay excitation coil and the fifth monitoring input circuit.

[0017] Preferably, the first monitoring open-in circuit, the second monitoring open-in circuit, the third monitoring open-in circuit, the fourth monitoring open-in circuit and the fifth monitoring open-in circuit are all high-voltage open-in circuits, which are used to isolate the measured high-voltage voltage from the logic low-voltage signal area.

[0018] Preferably, the high-voltage input circuit includes an optocoupler element, a series resistor of the circuit under test, a current-limiting resistor at the input end of the optocoupler element, and a pull-up resistor at the output end of the optocoupler element;

[0019] Wherein, the series resistance of the circuit under test is connected in series with the current circuit under test;

[0020] The primary input terminal of the optocoupler is connected to the upper end of the series resistor of the circuit under test, and the primary output terminal of the optocoupler is connected to the current limiting resistor at the input terminal of the optocoupler and then connected to the lower end of the series resistor of the circuit under test;

[0021] The high voltage signal current passes through the parallel circuit formed by the series resistance of the measured circuit and the current limiting resistance of the source side of the optocoupler and the input end of the optocoupler, and the input end of the optocoupler is used as the current limiting resistance;

[0022] When current flows through the primary side of the optocoupler, the voltage state of the pull-up resistor at the output end of the optocoupler is changed, and the voltage signal is transmitted to the logic low-voltage signal area and finally to the CPU.

[0023] Preferably, the first monitoring input circuit is connected to the normally open contact output terminal of the switching switch, and the conducting and closing states of the normally open contact of the switching switch are monitored by the voltage change of the normally open contact output terminal of the switching switch;

[0024] When the normally open contacts of the switching switch are disconnected, no current flows through the primary side of the optocoupler element in the first monitoring open-in circuit, the optocoupler does not change position, and the optocoupler output side maintains the open-in signal at a high level due to the pull-up resistor; when the normally open contacts of the switching switch are closed, current flows through the primary side of the optocoupler element in the first monitoring open-in circuit, the optocoupler changes position, the optocoupler output side is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

[0025] Preferably, the second monitoring input circuit is connected to the normally closed contact output terminal of the switching switch, and the conduction and closing state of the normally closed contact of the switching switch is monitored by the voltage change of the normally closed contact output terminal of the switching switch;

[0026] When the normally closed contacts of the switching switch are disconnected, no current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler does not change position, and the optocoupler output side maintains the open-in signal at a high level due to the pull-up resistor; when the normally open contacts of the switching switch are closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler changes position, the optocoupler output side is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

[0027] Preferably, the third monitoring input circuit is connected to the manual closing normally open contact output terminal in the KK handle, and the manual closing normally open contact position of the KK handle is monitored by the voltage change of the manual closing normally open contact output terminal;

[0028] When the manual closing normally open contact in the KK handle is opened, no current flows through the primary side of the optocoupler element in the third monitoring open-in circuit, and the optocoupler does not change position. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor; when the manual closing normally open contact in the KK handle is closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler changes position, and the output side of the optocoupler is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

[0029] Preferably, the fourth monitoring input circuit is connected to the automatic opening and closing normally closed contact output terminal of the KK handle, and the position of the automatic opening and closing contact of the KK handle is monitored through the voltage change of the automatic opening and closing normally closed contact output terminal;

[0030] When the manual closing normally closed contact in the KK handle is opened, no current flows through the primary side of the optocoupler in the fourth monitoring input circuit, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the input signal at a high level due to the pull-up resistor. When the manual closing normally closed contact in the KK handle is closed, current flows through the primary side of the optocoupler in the second monitoring input circuit, the optocoupler is displaced, and the output side of the optocoupler is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

[0031] Preferably, the fifth monitoring input circuit is connected to the manual opening normally open contact output terminal of the KK handle, and the position of the manual opening normally open contact of the KK handle is monitored through the voltage change of the manual opening normally open contact output terminal;

[0032] When the normally open contact of the manual opening switch in the KK handle is opened, no current flows through the primary side of the optocoupler element in the fourth monitoring input circuit, and the optocoupler does not change position. The output side of the optocoupler maintains the input signal at a high level due to the pull-up resistor; when the normally open contact of the manual opening switch in the KK handle is closed, current flows through the primary side of the optocoupler element in the fourth monitoring input circuit, the optocoupler changes position, and the output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential, and the signal change is transmitted to the CPU.

[0033] Preferably, the anti-comparison readback circuit is connected with the protection preset opening and closing and the remote control preset opening and closing;

[0034] The inverse comparison readback circuit outputs the inverse comparison readback input signal and the fourth monitoring input circuit constitutes the basis for the logic judgment of the protection opening and closing control and the remote control opening and closing control;

[0035] The preset functions of the protection preset opening and closing control signal and the remote control preset opening and closing control signal are judged; when the protection preset opening and closing control signal is valid, the reverse comparison feedback input signal changes, and the fourth monitoring input circuit does not change; when the remote control preset opening and closing control signal is valid, the reverse comparison feedback input signal changes, and the fourth monitoring input circuit changes.

[0036] The present invention also proposes a method for monitoring a control circuit of a pole-mounted switch opening and closing operation, which is implemented based on a monitoring device for the control circuit of a pole-mounted switch opening and closing operation, and the method comprises:

[0037] After the pole-mounted switch opening and closing operation control circuit is powered on, when the normally open contact of the switching switch is closed, no current flows through the first monitoring input circuit and the fourth monitoring input circuit when the switch opening and closing operation control circuit does not perform remote opening and remote closing; at this time, the outputs of the first monitoring input circuit 1 and the fourth monitoring input circuit 4 are high level; when the remote control preset opening and closing signal is valid, and the opening and closing operation control mechanism performs the opening and closing operation, it means that the automatic control opening signal turns on the opening control circuit and energizes the opening relay; or the automatic control and closing signal turns on the closing control circuit and energizes the closing relay; at this time, current flows through the first monitoring input circuit and the fourth monitoring input circuit, and the outputs of the first monitoring input circuit and the fourth monitoring input circuit change from high level to low level; at the same time, because current flows through the anti-comparison readback circuit, the output of the anti-comparison readback circuit changes from high level to low level;

[0038] Through the remote control opening and closing process, it is known whether the circuit connection between the switching switch and the opening and closing control circuit and the closing control circuit is correct according to the first monitoring input circuit, the fourth monitoring input circuit and the anti-comparison readback circuit.

[0039] Preferably, when the normally closed contact of the switch is closed, it is the on-site test state of the switch operation control circuit, and the switch control work of manual opening, manual closing and automatic opening and closing is completed through the KK handle:

[0040] When the manual opening operation is performed, the manual opening circuit includes the second monitoring input circuit and the fifth monitoring input circuit; when the manual opening contact is opened, no current flows through the second monitoring input circuit and the fifth monitoring input circuit, and the output of the second monitoring input circuit and the fifth monitoring input circuit is high level; when the manual opening contact is closed, current flows through the second monitoring input circuit and the fifth monitoring input circuit, and the output of the second monitoring input circuit and the fifth monitoring input circuit is low level, and the output level changes; this potential change is correct, and it can be judged that the manual opening operation circuit in the opening and closing operation control circuit is correct;

[0041] During manual closing operation, the manual closing circuit includes the second monitoring input circuit and the third monitoring input circuit; when the manual closing contact is opened, no current flows through the second monitoring input circuit and the third monitoring input circuit, and the output of the second monitoring input circuit and the third monitoring input circuit is high level; when the manual closing contact is closed, current flows through the second monitoring input circuit and the third monitoring input circuit, and the output of the second monitoring input circuit and the third monitoring input circuit is low level, and the output level changes; this potential change is correct, and it can be judged that the manual closing operation circuit in the opening and closing operation control circuit is correct;

[0042] When the switch is opened and closed remotely in the test state, no current flows through the first monitoring input circuit when the switch opening and closing operation control circuit does not perform remote opening and remote closing; at this time, the output of the first monitoring input circuit is high level; when the remote control preset opening and closing signal is valid, and the opening and closing operation control mechanism performs the opening and closing operation, the automatic control opening signal turns on the opening control circuit and energizes the opening relay; or the automatic control and closing signal turns on the closing control circuit and energizes the closing relay; at this time, current flows through the first monitoring input circuit, and the output of the first monitoring input circuit changes from high level to low level, and at the same time, the output of the anti-comparison readback circuit also changes from high level to low level because current flows through it; this potential change is correct, and it can be judged that the opening and closing operation circuit in the test state in the opening and closing operation control circuit is correct.

[0043] The beneficial effects of the present invention are that, compared with the prior art, it has at least the following beneficial effects:

[0044] 1. The present invention can monitor the key nodes of the opening and closing operation control loop in real time, clarify the state of the opening and closing operation control loop, improve the transparency of circuit behavior, and facilitate background management;

[0045] 2. The present invention can quickly locate abnormal positions in the opening and closing operation control circuit, which is helpful to quickly determine the fault and solve the problem, thereby avoiding the risk of malfunction and failure caused by internal logical errors of the operating mechanism;

[0046] 3. The present invention has low implementation cost, is easy to implement, requires little change to the original circuit, and has certain economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural block diagram of the control circuit and monitoring device for the opening and closing operation of the switch on the center column of the present invention;

[0048] Figure 2 It is a structural schematic diagram of the monitoring input circuit in the present invention;

[0049] Figure 3 It is a flow chart of the method for monitoring the control circuit of the opening and closing operation of the switch on the center pole of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0051] like Figure 1As shown, the monitoring device for the control circuit of the opening and closing operation of the pole switch proposed by the present invention comprises: a KK handle and a monitoring input circuit;

[0052] Specifically, the common terminal of the switching switch is connected to the positive power supply of the switch operating mechanism, the normally open contact output terminal of the switching switch is connected to the common terminal of the normally closed contact input of the KK handle, and is connected to the first monitoring input circuit 1. The normally closed contact output terminal of the switching switch is connected to the common terminal of the normally open contact input of the KK handle, and is connected to the second monitoring input circuit 2.

[0053] The manual closing normally open contact output terminal of the KK handle is connected to the positive pole of the closing relay excitation coil, and is also connected to the third monitoring input circuit 3. The automatic opening and closing normally closed contact output terminal of the KK handle is connected to the protection preset opening and closing, remote control preset opening and closing, and is also connected to the fourth monitoring input circuit 4. The manual opening normally open contact output terminal of the KK handle is connected to the positive pole of the opening relay excitation coil, and is also connected to the fifth monitoring input circuit 5.

[0054] The first monitoring open-in circuit 1, the second monitoring open-in circuit 2, the third monitoring open-in circuit 3, the fourth monitoring open-in circuit 4, and the fifth monitoring open-in circuit 5 are all high-voltage open-in circuits with the same circuit structure. The high-voltage open-in circuit isolates the measured high-voltage voltage from the logic low-voltage signal area.

[0055] like Figure 2 As shown, the high-voltage input circuit is composed of an optocoupler element, a series resistor of the measured circuit, a current-limiting resistor at the input end of the optocoupler element, and a pull-up resistor at the output end of the optocoupler element.

[0056] The series resistor of the circuit under test is connected in series with the current circuit under test.

[0057] The primary input terminal of the optocoupler element is connected to the upper end of the series resistor of the measured circuit, and the primary output terminal of the optocoupler element is connected to the current limiting resistor at the input terminal of the optocoupler element and then connected to the lower end of the series resistor of the measured circuit.

[0058] The high voltage signal current passes through the parallel circuit composed of the series resistance of the measured circuit and the current limiting resistance of the source side of the optocoupler and the input end of the optocoupler. Due to the effect of the current limiting resistance at the input end of the optocoupler, the current flowing through the primary side of the optocoupler is small and will not affect the subsequent conduction of the high voltage signal current.

[0059] When current flows through the primary side of the optocoupler, the voltage state of the pull-up resistor at the output end of the optocoupler is changed, and the voltage signal is transmitted to the logic low-voltage signal area and finally to the CPU.

[0060] Furthermore, the functions of each monitoring input circuit in the present invention are as follows:

[0061] The first monitoring open-input circuit 1 is connected to the output end of the normally open contact of the switching switch, and monitors the conduction and closing state of the normally open contact of the switching switch through the voltage change at the output end of the normally open contact of the switching switch. When the normally open contact of the switching switch is disconnected, no current flows through the primary side of the optocoupler element in the first monitoring open-input circuit 1, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the open-input signal at a high level due to the pull-up resistor. When the normally open contact of the switching switch is closed, current flows through the primary side of the optocoupler element in the first monitoring open-input circuit 1, and the optocoupler is displaced. The output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential, and the signal change is transmitted to the CPU.

[0062] The second monitoring open-in 2 circuit is connected to the normally closed contact output terminal of the switching switch, and monitors the conduction and closing state of the normally closed contact of the switching switch by changing the voltage at the output terminal of the normally closed contact of the switching switch. When the normally closed contact of the switching switch is disconnected, no current flows through the primary side of the optocoupler element in the second monitoring open-in circuit 2, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor. When the normally open contact of the switching switch is closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit 2, and the optocoupler is displaced. The output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential, and the signal change is transmitted to the CPU.

[0063] The voltage changes of the first monitoring input circuit 1 and the second monitoring input circuit 2 are used to confirm whether the switching switch is in a manual opening and closing state or an automatic opening and closing state.

[0064] The third monitoring open-in circuit 3 is connected to the manual closing normally open contact output terminal in the KK handle, and monitors the position of the manual closing normally open contact of the KK handle through the voltage change of the manual closing normally open contact output terminal. When the manual closing normally open contact in the KK handle is opened, no current flows through the primary side of the optocoupler element in the third monitoring open-in circuit 3, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor. When the manual closing normally open contact in the KK handle is closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit 3, the optocoupler is displaced, and the output side of the optocoupler is turned on to change the potential of the pull-up resistor to a low potential. The signal change is transmitted to the CPU and sent to the background through the CPU.

[0065] The fourth monitoring open-in circuit 4 is connected to the output terminal of the automatic opening and closing normally closed contact in the KK handle, and monitors the position of the automatic opening and closing contact of the KK handle through the voltage change of the output terminal of the automatic opening and closing normally closed contact. When the manual closing normally closed contact in the KK handle is opened, no current flows through the primary side of the optocoupler element in the fourth monitoring open-in circuit 4, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor. When the manual closing and opening contacts in the KK handle are closed, current flows through the primary side of the optocoupler element in the fourth monitoring open-in circuit 4, and the optocoupler is displaced. The output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential. The signal change is transmitted to the CPU and sent to the background through the CPU.

[0066] The fifth monitoring open-in circuit 5 is connected to the manual opening normally-open contact output terminal in the KK handle, and monitors the position of the manual opening normally-open contact of the KK handle through the voltage change at the manual opening normally-open contact output terminal. When the manual opening normally-open contact in the KK handle is opened, no current flows through the primary side of the optocoupler element in the fifth monitoring open-in circuit 5, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor. When the manual opening normally-open contact in the KK handle is closed, current flows through the primary side of the optocoupler element in the fifth monitoring open-in circuit 5, and the optocoupler is displaced. The output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential. The signal change is transmitted to the CPU and sent to the background via the CPU.

[0067] The CPU is used to receive signals and can send out protection opening and closing control, remote control opening and closing control, automatic control opening, and automatic control closing signals.

[0068] Furthermore, signal changes are obtained, and the circuit behavior after the protection opening and closing control, remote control opening and closing control, automatic control opening, and automatic control closing signals are sent out is monitored in real time at each key node of the control loop.

[0069] An inverse comparison readback circuit is provided to be connected with the protection preset opening and closing circuit and the remote control preset opening and closing circuit to monitor the functional integrity of the protection preset closing circuit and the remote control preset opening and closing circuit.

[0070] When the protection preset opening and closing signal is valid, the protection preset opening and closing circuit is activated, and the positive electricity is connected to the reverse comparative reading through the protection preset opening and closing circuit, so that the reverse comparative reading input signal changes to , which means that the protection preset opening and closing circuit is in good function and the next opening and closing operation can be performed. According to actual needs, the opening signal or the closing signal is automatically controlled to turn on the opening control circuit, excite the opening relay, and the opening relay contacts perform the opening action. Or the closing relay is excited, and the closing relay contacts perform the closing action.

[0071] When the remote preset opening and closing signal is valid, the remote preset opening and closing circuit is activated, and the positive electricity is connected to the reverse comparison feedback through the remote preset opening and closing circuit, so that the return feedback input signal changes to , which means that the protection preset opening and closing circuit is in good function and the next opening and closing operation can be performed. According to actual needs, the opening signal or the closing signal is automatically controlled to turn on the opening control circuit, excite the opening relay, and the opening relay contacts perform the opening action. Or the closing relay is excited, and the closing relay contacts perform the closing action.

[0072] The protection preset opening and closing signal and the remote control preset opening and closing signal will not appear at the same time. Therefore, through the anti-comparison readback circuit, the circuit function monitoring of the protection preset opening and closing circuit and the remote control preset opening and closing circuit can be completed one by one.

[0073] like Figure 3 As shown, the monitoring method of the pole-mounted switch opening and closing operation control circuit monitoring device proposed by the present invention for monitoring the pole-mounted switch opening and closing operation control circuit is as follows:

[0074] like Figure 1 As shown, after the pole switch opening and closing operation control circuit is powered on, when the normally open contact of the switch is closed, it is in remote control working mode. When the switch opening and closing operation control circuit is not remotely opened or closed, no current flows through the first monitoring input circuit 1 and the fourth monitoring input circuit 4. Figure 2 As shown, at this time, the outputs of the first monitoring input circuit 1 and the fourth monitoring input circuit 4 are high level. When the remote control preset opening and closing signal is valid, and the opening and closing operation control mechanism performs the opening and closing operation, the opening signal is automatically controlled to turn on the opening control circuit and energize the opening relay. Or the automatic control and gate signal turns on the closing control circuit and energizes the closing relay. At this time, current flows through the first monitoring input circuit 1 and the fourth monitoring input circuit 4, and the outputs of the first monitoring input circuit 1 and the fourth monitoring input circuit 4 change from high level to low level. At the same time, because current flows through the anti-comparison readback circuit, the output of the anti-comparison readback circuit also changes from high level to low level.

[0075] Through the remote control of the opening and closing process, it can be known from the first monitoring input circuit 1, the fourth monitoring input circuit 4 and the anti-comparison readback circuit whether the circuit connection between the switching switch and the opening and closing control circuit and the closing control circuit is correct.

[0076] When the normally closed contact of the switch is closed, it is in the local working mode, and the switch operation control circuit is in the on-site test state. The tester uses the KK handle to complete the switch control work of manual opening, manual closing and automatic opening and closing.

[0077] When manual opening operation is performed. Figure 1As shown, there are the second monitoring input circuit 2 and the fifth monitoring input circuit 5 in the manual opening circuit; when the manual opening contact KKSF is opened, no current flows through the second monitoring input circuit 2 and the fifth monitoring input circuit 5, and the output of the second monitoring input circuit 2 and the fifth monitoring input circuit 5 is high level. When the manual opening contact KKSF is closed, current flows through the second monitoring input circuit 2 and the fifth monitoring input circuit 5, and the output of the second monitoring input circuit 2 and the fifth monitoring input circuit 5 is low level, and the output level changes. This potential change is correct, and it can be judged that the manual opening operation circuit in the opening and closing operation control circuit is correct.

[0078] When manual closing operation is performed. Figure 1 As shown, there are the second monitoring input circuit 2 and the third monitoring input circuit 3 in the manual closing circuit. When the manual closing contact KKSH is opened, no current flows through the second monitoring input circuit 2 and the third monitoring input circuit 3, and the output of the second monitoring input circuit 2 and the third monitoring input circuit 3 is high level. When the manual closing contact KKSH is closed, current flows through the second monitoring input circuit 2 and the third monitoring input circuit 3, and the output of the second monitoring input circuit 2 and the third monitoring input circuit 3 is low level, and the output level changes. This potential change is correct, and it can be judged that the manual closing operation circuit in the opening and closing operation control circuit is correct.

[0079] When the switch is opened and closed by remote control in the test state, that is, in the automatic opening and closing mode, no current flows through the first monitoring input circuit 1 when the switch opening and closing operation control circuit does not perform remote opening and closing. Figure 2 As shown, at this time, the output of the first monitoring input circuit 1 is high level. When the remote control preset opening and closing signal is valid, the opening and closing operation control mechanism performs the opening and closing operation, that is, the automatic control opening signal turns on the opening control circuit and excites the opening relay. Or the automatic control and gate signal turns on the closing control circuit and excites the closing relay. At this time, current flows through the first monitoring input circuit 1, and the output of the first monitoring input circuit 1 changes from high level to low level. At the same time, because current flows through the anti-comparison readback circuit, the output of the anti-comparison readback circuit also changes from high level to low level. This potential change is correct, and it can be judged that the opening and closing operation circuit is correct under the test state in the opening and closing operation control loop.

[0080] The beneficial effects of the present invention are that, compared with the prior art, the present invention can monitor the key nodes of the opening and closing operation control loop in real time, clarify the state of the opening and closing operation control loop, and can quickly locate the abnormal position in the opening and closing operation control loop. In addition, the present invention makes relatively small changes to the original loop and has a low implementation cost.

[0081] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0082] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0083] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0084] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A monitoring device for a control circuit of a pole-mounted switch opening and closing operation, characterized in that: include: KK handles and monitors the circuit; Among them, the common end of the switching switch is connected to the positive power supply of the switch operating mechanism, and the normally open contact output end of the switching switch is connected to the normally closed contact input common end of the KK handle and the first monitoring input circuit respectively; The normally closed contact output terminal of the switch is connected to the normally open contact input common terminal of the KK handle and the second monitoring input circuit respectively; The output end of the manual closing normally open contact of the KK handle is connected to the positive pole of the closing relay excitation coil and the third monitoring input circuit respectively; The automatic opening and closing normally closed contact output terminals of the KK handle are respectively connected to the protection preset opening and closing, remote control preset opening and closing, and the fourth monitoring input circuit; The manual opening normally open contact output terminal in the KK handle is respectively connected to the positive pole of the opening relay excitation coil and the fifth monitoring input circuit.

2. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The first monitoring open-in circuit, the second monitoring open-in circuit, the third monitoring open-in circuit, the fourth monitoring open-in circuit and the fifth monitoring open-in circuit are all high-voltage open-in circuits, which are used to isolate the measured high-voltage voltage from the logic low-voltage signal area.

3. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 2 is characterized in that: The high-voltage input circuit includes an optocoupler, a series resistor of the circuit under test, a current-limiting resistor at the input end of the optocoupler, and a pull-up resistor at the output end of the optocoupler; Wherein, the series resistance of the circuit under test is connected in series with the current circuit under test; The primary input terminal of the optocoupler is connected to the upper end of the series resistor of the circuit under test, and the primary output terminal of the optocoupler is connected to the current limiting resistor at the input terminal of the optocoupler and then connected to the lower end of the series resistor of the circuit under test; The high voltage signal current passes through the parallel circuit formed by the series resistance of the measured circuit and the current limiting resistance of the source side of the optocoupler and the input end of the optocoupler, and the input end of the optocoupler is used as the current limiting resistance; When current flows through the primary side of the optocoupler, the voltage state of the pull-up resistor at the output end of the optocoupler is changed, and the voltage signal is transmitted to the logic low-voltage signal area and finally to the CPU.

4. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The first monitoring input circuit is connected to the normally open contact output terminal of the switching switch, and monitors the conduction and closing state of the normally open contact of the switching switch through the voltage change of the normally open contact output terminal of the switching switch; When the normally open contacts of the switching switch are disconnected, no current flows through the primary side of the optocoupler element in the first monitoring open-in circuit, the optocoupler does not change position, and the optocoupler output side maintains the open-in signal at a high level due to the pull-up resistor; when the normally open contacts of the switching switch are closed, current flows through the primary side of the optocoupler element in the first monitoring open-in circuit, the optocoupler changes position, the optocoupler output side is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

5. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The second monitoring input circuit is connected to the normally closed contact output terminal of the switching switch, and monitors the conduction and closing state of the normally closed contact of the switching switch through the voltage change of the normally closed contact output terminal of the switching switch; When the normally closed contacts of the switching switch are disconnected, no current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler does not change position, and the optocoupler output side maintains the open-in signal at a high level due to the pull-up resistor; when the normally open contacts of the switching switch are closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler changes position, the optocoupler output side is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

6. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The third monitoring input circuit is connected to the manual closing normally open contact output terminal in the KK handle, and the manual closing normally open contact position of the KK handle is monitored through the voltage change of the manual closing normally open contact output terminal; When the manual closing normally open contact in the KK handle is opened, no current flows through the primary side of the optocoupler element in the third monitoring open-in circuit, and the optocoupler does not change position. The output side of the optocoupler maintains the open-in signal at a high level due to the pull-up resistor; when the manual closing normally open contact in the KK handle is closed, current flows through the primary side of the optocoupler element in the second monitoring open-in circuit, the optocoupler changes position, and the output side of the optocoupler is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

7. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The fourth monitoring input circuit is connected to the automatic opening and closing normally closed contact output terminal of the KK handle, and the position of the automatic opening and closing contact of the KK handle is monitored through the voltage change of the automatic opening and closing normally closed contact output terminal; When the manual closing normally closed contact in the KK handle is opened, no current flows through the primary side of the optocoupler in the fourth monitoring input circuit, and no displacement of the optocoupler occurs. The output side of the optocoupler maintains the input signal at a high level due to the pull-up resistor. When the manual closing normally closed contact in the KK handle is closed, current flows through the primary side of the optocoupler in the second monitoring input circuit, the optocoupler is displaced, and the output side of the optocoupler is turned on, causing the pull-up resistor potential to change to a low potential, and the signal change is transmitted to the CPU.

8. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The fifth monitoring input circuit is connected to the manual opening normally open contact output terminal of the KK handle, and monitors the position of the manual opening normally open contact of the KK handle through the voltage change of the manual opening normally open contact output terminal; When the normally open contact of the manual opening switch in the KK handle is opened, no current flows through the primary side of the optocoupler element in the fourth monitoring input circuit, and the optocoupler does not change position. The output side of the optocoupler maintains the input signal at a high level due to the pull-up resistor; when the normally open contact of the manual opening switch in the KK handle is closed, current flows through the primary side of the optocoupler element in the fourth monitoring input circuit, the optocoupler changes position, and the output side of the optocoupler is turned on, causing the potential of the pull-up resistor to change to a low potential, and the signal change is transmitted to the CPU.

9. The monitoring device for the control circuit of the pole-mounted switch opening and closing operation according to claim 1 is characterized in that: The reverse comparison readback circuit is connected with the protection preset opening and closing and the remote control preset opening and closing; The inverse comparison readback circuit outputs the inverse comparison readback input signal and the fourth monitoring input circuit constitutes the basis for the logic judgment of the protection opening and closing control and the remote control opening and closing control; The preset functions of the protection preset opening and closing control signal and the remote control preset opening and closing control signal are judged; when the protection preset opening and closing control signal is valid, the reverse comparison feedback input signal changes, and the fourth monitoring input circuit does not change; when the remote control preset opening and closing control signal is valid, the reverse comparison feedback input signal changes, and the fourth monitoring input circuit changes.

10. A method for monitoring a control circuit of a pole-mounted switch opening and closing operation, implemented based on the monitoring device for the control circuit of a pole-mounted switch opening and closing operation according to any one of claims 1 to 9, characterized in that: The method includes: After the pole-mounted switch opening and closing operation control circuit is powered on, when the normally open contact of the switching switch is closed, no current flows through the first monitoring input circuit and the fourth monitoring input circuit when the switch opening and closing operation control circuit does not perform remote opening and remote closing; at this time, the outputs of the first monitoring input circuit 1 and the fourth monitoring input circuit 4 are high level; when the remote control preset opening and closing signal is valid, and the opening and closing operation control mechanism performs the opening and closing operation, it means that the automatic control opening signal turns on the opening control circuit and energizes the opening relay; or the automatic control and closing signal turns on the closing control circuit and energizes the closing relay; at this time, current flows through the first monitoring input circuit and the fourth monitoring input circuit, and the outputs of the first monitoring input circuit and the fourth monitoring input circuit change from high level to low level; at the same time, because current flows through the anti-comparison readback circuit, the output of the anti-comparison readback circuit changes from high level to low level; Through the remote control opening and closing process, it is known whether the circuit connection between the switching switch and the opening and closing control circuit and the closing control circuit is correct according to the first monitoring input circuit, the fourth monitoring input circuit and the anti-comparison readback circuit.

11. The method for monitoring the control circuit of the pole-mounted switch opening and closing operation according to claim 10, characterized in that: When the normally closed contact of the transfer switch is closed, it is the on-site test state of the switch operation control circuit. The switch control work of manual opening, manual closing and automatic opening and closing is completed through the KK handle: When the manual opening operation is performed, the manual opening circuit includes the second monitoring input circuit and the fifth monitoring input circuit; when the manual opening contact is opened, no current flows through the second monitoring input circuit and the fifth monitoring input circuit, and the output of the second monitoring input circuit and the fifth monitoring input circuit is high level; when the manual opening contact is closed, current flows through the second monitoring input circuit and the fifth monitoring input circuit, and the output of the second monitoring input circuit and the fifth monitoring input circuit is low level, and the output level changes; this potential change is correct, and it can be judged that the manual opening operation circuit in the opening and closing operation control circuit is correct; During manual closing operation, the manual closing circuit includes the second monitoring input circuit and the third monitoring input circuit; when the manual closing contact is opened, no current flows through the second monitoring input circuit and the third monitoring input circuit, and the output of the second monitoring input circuit and the third monitoring input circuit is high level; when the manual closing contact is closed, current flows through the second monitoring input circuit and the third monitoring input circuit, and the output of the second monitoring input circuit and the third monitoring input circuit is low level, and the output level changes; this potential change is correct, and it can be judged that the manual closing operation circuit in the opening and closing operation control circuit is correct; When the switch is opened and closed remotely in the test state, no current flows through the first monitoring input circuit when the switch opening and closing operation control circuit does not perform remote opening and remote closing; at this time, the output of the first monitoring input circuit is high level; when the remote control preset opening and closing signal is valid, and the opening and closing operation control mechanism performs the opening and closing operation, the automatic control opening signal turns on the opening control circuit and energizes the opening relay; or the automatic control and closing signal turns on the closing control circuit and energizes the closing relay; at this time, current flows through the first monitoring input circuit, and the output of the first monitoring input circuit changes from high level to low level, and at the same time, the output of the anti-comparison readback circuit also changes from high level to low level because current flows through it; this potential change is correct, and it can be judged that the opening and closing operation circuit in the test state in the opening and closing operation control circuit is correct.

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