CN116047284A - Circuit, method, medium and terminal for detecting opening and closing closed loop of circuit breaker - Google Patents

Abstract

The invention provides a circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal. The detection circuit includes a feeder terminal CPU, an optocoupler drive module, a switch module, a signal detection module, a control power supply module and a remote control module. The remote control module is used for Feedback the opening and closing state information of the circuit breaker to the feeder terminal CPU, the output terminal of the optocoupler drive module is electrically connected to the feeder terminal CPU, and the signal detection module is used to detect whether the circuit breaker action coil is working normally and generate a corresponding initial level signal , the switch module converts the initial level signal generated by the signal detection module into a switch signal, the optocoupler drive module isolates the switch signal and converts it into a feedback level signal, and the feeder terminal CPU determines according to the feedback level signal and the opening and closing state information Whether there is any abnormality in the opening and closing of the circuit breaker. The invention effectively improves the accuracy of detecting the abnormal state of the circuit breaker, reduces the possibility of misjudgment, and simultaneously reduces the complexity of line wiring.

Description

Circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal

technical field

The invention belongs to the technical field of power grid detection, and in particular relates to a circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal.

Background technique

In the power system, the circuit breaker is an important component to ensure normal power supply and remove short-circuit faults. It can break, close and carry the normal current of the operating line, and can carry the short-circuit current within the specified range. It is very important for the automatic construction of distribution network feeders. is of great significance. However, during the long-term operation of the circuit breaker, the disconnection defect of the control circuit will occur, which will affect the normal operation of the circuit breaker and the correct execution of protection commands. Traditional control loop disconnection detection often adopts a single optocoupler or relay solution. These two solutions have a high voltage between the active remote control power supply circuit, which leads to misjudgment and misoperation of the test bench or circuit breaker, resulting in power distribution feeder failure. Automated fault isolation, failure recovery.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal, which effectively improves the accuracy of detection of abnormal state of the circuit breaker and reduces the possibility of misjudgment Sex, while reducing the complexity of line wiring.

In order to achieve the above purpose and other related purposes, the present invention provides a circuit breaker opening and closing closed-loop detection circuit, including a feeder terminal CPU, an optocoupler drive module, a switch module, a signal detection module, a control power supply module and a remote control module. The power supply module is electrically connected to the circuit breaker to be tested to supply power to the circuit breaker, and the remote control module is communicatively connected to the feeder terminal CPU for feeding back the opening and closing state information of the circuit breaker to the feeder The terminal CPU, and the control power supply module is also electrically connected to the signal detection module, the optocoupler drive module, and the switch module, and the input end of the signal detection module is electrically connected to the output end of the remote control module , the output end of the signal detection module is electrically connected to the input end of the switch module, the output end of the switch module is electrically connected to the input end of the optocoupler drive module, and the output end of the optocoupler drive module is connected to the The feeder terminal CPU is electrically connected, the signal detection module is used to detect whether the circuit breaker action coil is working normally and generates a corresponding initial level signal, and the switch module converts the initial level signal generated by the signal detection module to level signal into a switch signal, the optocoupler drive module isolates the switch signal and converts it into a feedback level signal recognizable by the feeder terminal CPU, and the feeder terminal CPU The opening and closing status information of the circuit breaker is used to determine whether there is an abnormality in the opening and closing of the circuit breaker.

Optionally, when it is determined according to the opening and closing state information that the circuit breaker is in the closing state, when the feedback level signal is at a low level, it is determined that the closing circuit of the circuit breaker is abnormal, and when the feedback The level signal is high level, and it is determined that the closing circuit of the circuit breaker is in a normal state;

When it is determined according to the opening and closing status information that the circuit breaker is in the opening state, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is abnormal, and when the feedback level signal is at a low level High level, it is determined that the opening circuit of the circuit breaker is in a normal state.

Optionally, the circuit breaker opening and closing closed-loop detection circuit is integrated inside the feeder terminal, and the feeder terminal CPU is also used to report to alarm information.

Optionally, a circuit breaker is also connected between the control power supply module and the circuit breaker, and the circuit breaker is used to control the on and off of the control power supply module and the circuit breaker.

Optionally, the signal detection module includes a second resistor and a fourth resistor, one end of the second resistor is electrically connected to the positive electrode of the control power supply module, the other end of the second resistor is connected to one end of the fourth resistor, The positive pole of the remote control module is electrically connected, the other end of the fourth resistor is electrically connected to the negative pole of the control power supply module and the negative pole of the remote control module, the switch module includes a first resistor, a third resistor and a triode, so One end of the first resistor is electrically connected to one end of the second resistor, one end of the third resistor is electrically connected to one end of the fourth resistor, and the other end of the third resistor is electrically connected to the base of the triode, the The emitter of the triode is electrically connected to the negative pole of the control power supply, and the collector of the triode and the other end of the first resistor are both electrically connected to the optocoupler driving module.

Optionally, the optocoupler driving module includes an optocoupler, a fifth resistor and a capacitor, the first pin and the second pin of the optocoupler are respectively connected to the other end of the first resistor, the collector of the triode The electrodes are electrically connected, the fourth pin of the optocoupler is electrically connected to one end of the fifth resistor and one end of the capacitor, and the third pin of the optocoupler is grounded to the other end of the capacitor, so The other end of the fifth resistor is connected to the working voltage, and the fourth pin of the optocoupler is electrically connected to the feeder terminal CPU.

The present invention also provides a circuit breaker opening and closing closed-loop detection method, which is applied to the circuit breaker opening and closing closed-loop detection circuit, and the circuit breaker opening and closing closed-loop detection method includes:

Obtain the opening and closing status information of the circuit breaker to be tested through the feeder terminal CPU, and obtain the feedback level signal of the circuit breaker through the optocoupler drive module;

determining the state of the circuit breaker according to the opening and closing state information and the feedback level information;

After determining that the circuit breaker is in the abnormal state of disconnection, the feeder terminal CPU obtains the disconnection time when the circuit breaker is in the abnormal state, and generates disconnection alarm information according to the disconnection time.

Optionally, the determining the state of the circuit breaker according to the opening and closing state information and the feedback level information includes:

When it is determined that the circuit breaker is in the closing state according to the opening and closing state information, when the feedback level signal is low level, it is determined that the closing circuit of the circuit breaker is in an abnormal state. The signal is at a high level, and it is determined that the closing circuit of the circuit breaker is in a normal state;

When it is determined that the circuit breaker is in the open state according to the opening and closing state information, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is in an abnormal state, and when the feedback level signal When the signal is at a high level, it is determined that the opening circuit of the circuit breaker is in a normal state.

The present invention provides a storage medium on which a computer program is stored, and when the program is executed by a processor, the above-mentioned closed-loop detection method for opening and closing of a circuit breaker is realized.

The present invention provides a terminal, including: a processor and a memory; the memory is used to store computer programs; the processor is used to execute the computer programs stored in the memory, so that the terminal performs the above-mentioned opening and closing of the circuit breaker Closed loop detection method.

As mentioned above, the circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal of the present invention have the following beneficial effects:

Through the switch module and the signal detection module, the line abnormality detection of the circuit breaker to be tested is carried out, and the abnormal signal on the circuit breaker is converted into the feedback level signal that the CPU of the feeder terminal can recognize through the optocoupler drive module. Compared with the traditional relay detection scheme, it not only The cumbersome wiring is reduced, and the detection error caused by the detection of some wiring faults is avoided, and the entire detection circuit neither affects the original opening and closing function of the circuit breaker, nor does it have redundant wiring, which effectively improves the accuracy of the abnormal state detection of the circuit breaker and reduce the possibility of misjudgment.

Description of drawings

Fig. 1 is a structural block diagram of a circuit breaker opening and closing closed-loop detection circuit in a feeder terminal according to the present invention.

Fig. 2 is a structural block diagram of the circuit breaker opening and closing closed-loop detection circuit according to the present invention.

Fig. 3 is a schematic diagram of judgment logic of the feeder terminal CPU in the circuit breaker opening and closing closed-loop detection circuit of the present invention.

Fig. 4 is a schematic diagram showing the judging process of the circuit breaker opening and closing loop by the feeder terminal CPU in the circuit breaker opening and closing closed loop detection circuit of the present invention.

Fig. 5 is a circuit diagram of the circuit breaker opening and closing closed-loop detection circuit according to the present invention.

Fig. 6 is a flow chart of the detection method for opening and closing of the circuit breaker according to the present invention.

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

According to the circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal of the present invention, the circuit breaker to be tested is detected by the switch module and the signal detection module, and the abnormal signal on the circuit breaker is passed through the optocoupler. The drive module is converted into a feedback level signal that can be recognized by the feeder terminal CPU. Compared with the traditional relay detection scheme, it not only reduces the cumbersome wiring, but also avoids the detection error caused by the detection part of the wiring fault, and the entire detection circuit does not affect the original open circuit. Breaker opening and closing function, and there will be no redundant wiring, which effectively improves the accuracy of abnormal state detection of circuit breakers and reduces the possibility of misjudgment.

As shown in Figure 1, the present invention discloses a circuit breaker opening and closing closed-loop detection circuit, including a feeder terminal CPU10, an optocoupler drive module 20, a switch module 30, a signal detection module 40, a control power supply module and a remote control module 50. The control power supply module is electrically connected to the circuit breaker to be tested to supply power to the circuit breaker, and the remote control module 50 is communicatively connected to the feeder terminal CPU10 for feeding back the opening and closing state information of the circuit breaker to The feeder terminal CPU10, and the control power supply module are also electrically connected to the signal detection module 40, the optocoupler drive module 20, and the switch module 30, and the input terminal of the signal detection module 40 is connected to the The output end of the remote control module 50 is electrically connected, the output end of the signal detection module 40 is electrically connected to the input end of the switch module 30, and the output end of the switch module 30 is electrically connected to the input end of the optocoupler drive module 20. connected, the output end of the optocoupler drive module 20 is electrically connected to the feeder terminal CPU10, the signal detection module 40 is used to detect whether the circuit breaker action coil is working normally and generate a corresponding initial level signal, the The switch module 30 converts the initial level signal generated by the signal detection module into a switch signal, and the optocoupler drive module 20 isolates the switch signal and converts it into a feedback level recognizable by the feeder terminal CPU10 signal, and the feeder terminal CPU10 determines whether there is an abnormality in the opening and closing of the circuit breaker according to the feedback level signal and the opening and closing state information.

In this embodiment, the entire circuit and the circuit breaker action coil 60 are powered by controlling the power supply module to ensure that the entire circuit and the circuit breaker can work normally, and the circuit breaker action coil sends the current opening and closing state information through the remote control module 50 to the feeder terminal CPU10, and the signal detection module 40 detects whether the opening and closing circuit of the circuit breaker action coil 60 is normal and generates a corresponding initial level signal, and the switch module 30 converts the initial level signal into a switch signal, and the optocoupler drive module 20 to isolate the switch signal and convert it into a feedback level signal that can be recognized by the feeder terminal CPU10, so that the feeder terminal CPU10 can detect the abnormality of the opening and closing state of the circuit breaker action coil 60 according to the opening and closing state information and the feedback level signal , so as to quickly detect whether the circuit breaker action coil 60 is in an abnormal working state.

In some embodiments, referring to FIG. 2 , the circuit breaker opening and closing closed-loop detection circuit is integrated inside the feeder terminal, which neither affects the original circuit breaker opening and closing function nor has redundant wiring, and the abnormal state of the circuit breaker control loop The accuracy of the detection is higher, and the possibility of misjudgment is lower, and the feeder terminal CPU10 is also used to report the alarm information after determining that the circuit breaker opening circuit is abnormal or the circuit breaker closing circuit is abnormal, In order to make an alarm in time after detecting that the circuit breaker action coil 60 is abnormal, so as to notify the staff to handle it.

In some other embodiments, referring to FIG. 3 , when it is determined that the circuit breaker is in the closed state according to the opening and closing state information, when the feedback level signal is at a low level, it is determined that the circuit breaker is in the closed state. The circuit is abnormal, when the feedback level signal is high level, it is determined that the circuit breaker closing circuit is in a normal state;

When it is determined according to the opening and closing status information that the circuit breaker is in the opening state, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is abnormal, and when the feedback level signal is at a low level High level, it is determined that the opening circuit of the circuit breaker is in a normal state.

Exemplarily, the feeder terminal CPU 10 judges that the abnormal state of the circuit breaker operating coil 60 satisfies the following formula according to the opening and closing state information and the feedback level signal:

V _logic ＝(S _BK &(～S _F ))|((～S _BK )&(～S _H ))

Wherein, V _logic represents the detection result of the feeder terminal CPU 10 detecting the circuit breaker, V _logic being 1 represents that the circuit breaker circuit is working normally, V _logic being 0 represents that the circuit breaker circuit is abnormal, and S _BK represents a circuit breaker The opening and closing state information of the circuit breaker, S _BK is 1 or 0, when S _BK is 1, it means that the circuit breaker is in the closing state, 0 means that the circuit breaker is in the opening state; S _F means that the circuit breaker is in the The feedback level signal of the gate circuit state, S _F is 1 or 0, where S _F is 1, indicating that the signal of the circuit breaker opening circuit is detected as a high level after a short delay, and 0 indicates that the circuit breaker is open. The signal of the gate circuit is detected as low level after a short delay; S _H indicates the feedback level signal when the circuit breaker is the closing circuit, and _SH is 1 or 0, where _SH is 1, indicating the signal of the closing circuit It is high level after a short delay detection, and _SH is 0, which means that the closing circuit signal is low level after a short delay detection.

Specifically, referring to FIG. 4 , the process of the feeder terminal CPU10 determining the breaker action coil 60 according to the opening and closing state information and the feedback level signal is as follows: when the opening and closing state information S _BK =1, the feeder terminal CPU10 compares the opening and closing The feedback level signal S _F of the circuit state, if S _F = 0, it is determined that there is an abnormality in the control circuit of the circuit breaker, and a disconnection alarm is issued to indicate that the circuit breaker opening circuit is abnormal; when the opening and closing state information S _BK = 0 , the feeder terminal CPU10 compares the feedback level signal _SH of the circuit breaker closing circuit, if S _H =0, then the feeder terminal CPU10 determines that there is an abnormality in the circuit breaker action coil 60, and issues a disconnection alarm to remind the circuit breaker closing circuit abnormal. Specifically, its corresponding truth table is shown in the following table.

<![CDATA[S_BK]]> <![CDATA[S_F]]> <![CDATA[S_H]]> <![CDATA[V_logic<!-- 4 -->]]> 1 1 / Circuit breaker circuit is normal 1 0 / Circuit breaker circuit disconnection alarm 0 / 1 Circuit breaker circuit is normal 0 / 0 Circuit breaker circuit disconnection alarm

In some embodiments, a circuit breaker 70 is also connected between the control power module and the circuit breaker, and the circuit breaker 70 is used to control the on and off of the control power module and the circuit breaker, In order to control the detection process.

In some embodiments, referring to FIG. 5 , the signal detection module 40 includes a second resistor 401 and a fourth resistor 402, one end of the second resistor 401 is electrically connected to the positive pole of the control power supply module, and the second resistor The other end of 401 is electrically connected to one end of the fourth resistor 402 and the positive pole of the remote control module 50, and the other end of the fourth resistor 402 is electrically connected to the negative pole of the control power supply module and the negative pole of the remote control module 50. The switch module 30 includes a first resistor 301, a third resistor 302 and a triode 303, one end of the first resistor 301 is electrically connected to one end of the second resistor 401, one end of the third resistor 302 is connected to the fourth resistor 402 One end is electrically connected, the other end of the third resistor 302 is electrically connected to the base of the triode 303, the emitter of the triode 303 is electrically connected to the negative pole of the control power supply, the collector of the triode 303 is connected to the The other end of the first resistor 301 is electrically connected to the optocoupler driving module 20, the optocoupler driving module 20 includes an optocoupler 201, a fifth resistor 202 and a capacitor 203, the first pin L1 of the optocoupler 201 , the second pin L2 are respectively electrically connected to the other end of the first resistor 301 and the collector of the triode 303, the fourth pin L4 of the optocoupler 201 is connected to one end of the fifth resistor 202, the One end of the capacitor 203 is electrically connected, the third pin L3 of the optocoupler 201 and the other end of the capacitor 203 are grounded to GND, the other end of the fifth resistor 202 is connected to the working voltage, and the optocoupler 201 The fourth pin L4 is electrically connected to the feeder terminal CPU10.

When the open-close closed-loop line between the distribution feeder terminal and the circuit breaker is normal, the detection result V _logic =1, and the operating coil 60 is equivalent to being connected in parallel with the fourth resistor 402 during circuit breaker. Since the internal resistance of the circuit breaker operating coil 60 is relatively small, such as 100 ohms, and the resistance of the fourth resistor 402 in the circuit is several thousand ohms, the resistance becomes smaller after the two are connected in parallel (much smaller than the resistance of the fourth resistor 402) . The second resistor 401 divides the voltage with the resistor connected in parallel, so that the voltage of the node A is approximately 0 (less than 1V), the triode 303 works in the cut-off state, and the first pin L1 and the second pin L2 of the optocoupler 201 The light-emitting diode is in a non-conducting state, while the fourth pin L4 and the third pin L3 of the optocoupler 201 are in a cut-off state, so that the CPU_YX signal of the feeder terminal CPU10 is pulled up to a high level of 3.3V.

When the open-close closed-loop line between the distribution feeder terminal and the circuit breaker is abnormal, V _logic = 0, the circuit breaker action coil 60 is not connected in parallel to the fourth resistor 402, the second resistor 401 and the fourth resistor 402 divide the voltage, point A The voltage phase is much higher than the voltage when the line is normal, the triode 303 works in the amplified state, the emitter and collector pins of the triode are turned on, and the primary side of the optocoupler 201 (that is, the first pin L1 and the second pin L2 ) through the current limiting protection of the first resistor 301, the light-emitting diode in the optocoupler 201 is in the conduction state, and the fourth pin L4 and the third pin L3 of the optocoupler 201 are in the conduction state, so that the feeder terminal CPU10 The CPU_YX signal at the terminal is directly connected to GND, so the level of CPU_YX is a low level after being grounded, so as to determine that the current circuit breaker action coil 60 is in an abnormal state.

The present invention also discloses a circuit breaker opening and closing closed-loop detection method. Referring to FIG. 6 , it is applied to the circuit breaker opening and closing closed-loop detection circuit. The circuit breaker opening and closing closed-loop detection method includes the following steps:

S601. Obtain the opening and closing status information of the circuit breaker to be tested through the feeder terminal CPU, and obtain the feedback level signal of the circuit breaker through the optocoupler drive module;

S602. Determine the state of the circuit breaker according to the opening and closing state information and the feedback level information;

S603. After determining that the circuit breaker is in an abnormal state of disconnection, obtain a disconnection time when the circuit breaker is in an abnormal state through the feeder terminal CPU, and generate disconnection alarm information according to the disconnection time.

In some embodiments, the determining the state of the circuit breaker according to the opening and closing state information and the feedback level information includes:

When it is determined that the circuit breaker is in the closing state according to the opening and closing state information, when the feedback level signal is low level, it is determined that the closing circuit of the circuit breaker is in an abnormal state. The signal is at a high level, and it is determined that the closing circuit of the circuit breaker is in a normal state;

When it is determined that the circuit breaker is in the open state according to the opening and closing state information, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is in an abnormal state, and when the feedback level signal When the signal is at a high level, it is determined that the opening circuit of the circuit breaker is in a normal state.

Since the steps of the circuit breaker opening and closing closed-loop detection method correspond one-to-one to the working process of the circuit breaker opening and closing closed-loop detection circuit, details are not repeated here.

The circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal described in the present invention perform line abnormality detection on the circuit breaker to be tested through the switch module and the signal detection module, and convert the abnormal signal on the circuit breaker through the optocoupler drive module It is a feedback level signal that can be identified by the CPU of the feeder terminal. Compared with the traditional relay detection scheme, it not only reduces the cumbersome wiring, but also avoids the detection error caused by the detection of some wiring faults, and the entire detection circuit does not affect the original circuit breaker. There is no redundant wiring, which effectively improves the accuracy of abnormal state detection of circuit breakers and reduces the possibility of misjudgment.

It should be noted that the scope of protection of the circuit breaker opening and closing closed-loop detection method described in the present invention is not limited to the execution order of the steps listed in this embodiment. The solutions implemented by replacement are all included in the protection scope of the present invention.

The computer program is stored on the storage medium of the present invention, and when the program is executed by the processor, the above-mentioned closed-loop detection method for opening and closing of the circuit breaker is realized. The storage medium includes: various media capable of storing program codes such as ROM, RAM, magnetic disk, U disk, memory card or optical disk.

The terminal of the present invention includes a processor and a memory.

The memory is used to store computer programs. Preferably, the memory includes: various media capable of storing program codes such as ROM, RAM, magnetic disk, U disk, memory card or optical disk.

The processor is connected to the memory, and is used to execute the computer program stored in the memory, so that the terminal executes the above-mentioned closed-loop detection method for opening and closing of the circuit breaker.

Preferably, the processor can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it can also be a digital signal processor (Digital Signal Processor, DSP for short), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

In summary, the circuit breaker opening and closing closed-loop detection circuit, method, medium and terminal of the present invention, through the switch module and the signal detection module, detect the abnormality of the line of the circuit breaker to be tested, and pass the abnormal signal on the circuit breaker through the optocoupler The drive module is converted into a feedback level signal that can be recognized by the feeder terminal CPU. Compared with the traditional relay detection scheme, it not only reduces the cumbersome wiring, but also avoids the detection error caused by the detection part of the wiring fault, and the entire detection circuit does not affect the original open circuit. Breaker opening and closing function, and there will be no redundant wiring, which effectively improves the accuracy of abnormal state detection of circuit breakers and reduces the possibility of misjudgment. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. A circuit breaker opening and closing closed-loop detection circuit, characterized in that it comprises a feeder terminal CPU, an optocoupler drive module, a switch module, a signal detection module, a control power supply module and a remote control module, and the control power supply module and the to-be-tested The circuit breaker is electrically connected to supply power to the circuit breaker, the remote control module is communicatively connected to the feeder terminal CPU, and is used to feed back the opening and closing state information of the circuit breaker to the feeder terminal CPU, and the The control power supply module is also electrically connected to the signal detection module, the optocoupler drive module, and the switch module, the input end of the signal detection module is electrically connected to the output end of the remote control module, and the signal detection module The output end of the switch module is electrically connected to the input end of the switch module, the output end of the switch module is electrically connected to the input end of the optocoupler drive module, and the output end of the optocoupler drive module is electrically connected to the feeder terminal CPU connection, the signal detection module is used to detect whether the circuit breaker action coil is working normally and generate a corresponding initial level signal, and the switch module converts the initial level signal generated by the signal detection module into a switch signal , the optocoupler drive module isolates the switch signal and converts it into a feedback level signal recognizable by the feeder terminal CPU, and the feeder terminal CPU uses the feedback level signal and the opening and closing state information Determine whether the opening and closing of the circuit breaker is abnormal. 2. The circuit breaker opening and closing closed-loop detection circuit according to claim 1, characterized in that, when it is determined that the circuit breaker is in the closing state according to the opening and closing status information, when the feedback level signal is low level, to determine that the closing circuit of the circuit breaker is abnormal, and when the feedback level signal is high level, it is determined that the closing circuit of the circuit breaker is in a normal state; When it is determined according to the opening and closing status information that the circuit breaker is in the opening state, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is abnormal, and when the feedback level signal is at a low level High level, it is determined that the opening circuit of the circuit breaker is in a normal state. 3. The circuit breaker opening and closing closed-loop detection circuit according to claim 2, characterized in that, the circuit breaker opening and closing closed-loop detection circuit is integrated in the feeder terminal, and the feeder terminal CPU is also used to determine the Report alarm information after the circuit breaker opening circuit is abnormal or the circuit breaker closing circuit is abnormal. 4. The circuit breaker opening and closing closed-loop detection circuit according to claim 1, wherein a circuit breaker is also connected between the control power supply module and the circuit breaker, and the circuit breaker is used to control the control power supply module with the circuit breaker on and off. 5. The circuit breaker opening and closing closed-loop detection circuit according to any one of claims 1 to 3, wherein the signal detection module includes a second resistor and a fourth resistor, one end of the second resistor is connected to the The positive pole of the control power supply module is electrically connected, the other end of the second resistor is electrically connected to one end of the fourth resistor and the positive pole of the remote control module, the other end of the fourth resistor is connected to the negative pole of the control power supply module, the The negative pole of the remote control module is electrically connected, the switch module includes a first resistor, a third resistor and a triode, one end of the first resistor is electrically connected to one end of the second resistor, one end of the third resistor is connected to the fourth resistor One end is electrically connected, the other end of the third resistor is electrically connected to the base of the triode, the emitter of the triode is electrically connected to the negative electrode of the control power supply, the collector of the triode is connected to the first resistor The other ends are electrically connected with the optocoupler driving module. 6. The circuit breaker opening and closing closed-loop detection circuit according to claim 5, characterized in that, the optocoupler drive module includes an optocoupler, a fifth resistor and a capacitor, the first pin of the optocoupler, the second The pins are respectively electrically connected to the other end of the first resistor and the collector of the triode, the fourth pin of the optocoupler is electrically connected to one end of the fifth resistor and one end of the capacitor, and the The third pin of the optocoupler and the other end of the capacitor are grounded, the other end of the fifth resistor is connected to the working voltage, and the fourth pin of the optocoupler is electrically connected to the feeder terminal CPU. 7. A circuit breaker opening and closing closed-loop detection method, characterized in that it is applied to the circuit breaker opening and closing closed-loop detection circuit according to any one of claims 1 to 6, and the circuit breaker opening and closing closed-loop detection method include: Obtain the opening and closing status information of the circuit breaker to be tested through the feeder terminal CPU, and obtain the feedback level signal of the circuit breaker through the optocoupler drive module; determining the state of the circuit breaker according to the opening and closing state information and the feedback level information; After determining that the circuit breaker is in the abnormal state of disconnection, the feeder terminal CPU obtains the disconnection time when the circuit breaker is in the abnormal state, and generates disconnection alarm information according to the disconnection time. 8. The circuit breaker opening and closing closed-loop detection method according to claim 7, wherein said determining the state of the circuit breaker according to the opening and closing status information and the feedback level information comprises: When it is determined that the circuit breaker is in the closing state according to the opening and closing state information, when the feedback level signal is low level, it is determined that the closing circuit of the circuit breaker is in an abnormal state. The signal is at a high level, and it is determined that the closing circuit of the circuit breaker is in a normal state; When it is determined that the circuit breaker is in the open state according to the opening and closing state information, when the feedback level signal is at a low level, it is determined that the opening circuit of the circuit breaker is in an abnormal state, and when the feedback level signal When the signal is at a high level, it is determined that the opening circuit of the circuit breaker is in a normal state. 9. A storage medium, on which a computer program is stored, wherein when the program is executed by a processor, the circuit breaker opening and closing closed-loop detection method according to claim 7 or 8 is realized. 10. A terminal, comprising: a processor and a memory; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory, so that the terminal executes the circuit breaker opening and closing closed-loop detection method according to claim 7 or 8.

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