Power monitoring management early warning system

Abstract

The present invention provides an electric power monitoring management and early warning system, comprising: the monitoring unit comprises a current detection module, a voltage detection module and an analog-to-digital conversion module; the current detection module is used to detect the alternating current current and output it to the analog-to-digital conversion module, and the voltage detection module is used to detect the voltage of the alternating current and output it to the analog-to-digital conversion module; the output end of the analog-to-digital conversion module is connected to the input end of the central control unit; the central control unit receives the detection signals output by the current detection module and the voltage detection module to control the action of the execution unit, and the central control unit is communicatively connected with the remote monitoring unit and transmits the current detection information and the voltage detection information to the remote unit; the execution unit receives the control command of the central control unit to execute the opening and closing actions of the power supply; the power supply unit is used to convert the alternating current into direct current and provide working direct current to the analog-to-digital conversion module and the central control unit; through the above structure, the alternating current of the industrial equipment can be detected in real time and accurately, and overvoltage and overcurrent protection can be performed in time.

Description

Technical Field

[0001] The invention relates to a power management system, and in particular to a power monitoring management and early warning system. Background Art

[0002] In industrial production, alternating current provides a stable power source for equipment. Although the development of power supply technology has made alternating current more stable, there are still voltage and current fluctuations in industrial applications, which can cause equipment failures.

[0003] In the prior art, whether the AC power is overvoltage or overcurrent is generally detected and controlled by a vacuum circuit breaker, that is, when there is overvoltage or overcurrent, the vacuum circuit breaker directly trips to disconnect the power supply of the equipment. However, for precision equipment, when the fluctuation of the AC power does not meet the tripping requirement of the circuit breaker, if the corresponding protection is not performed, the fluctuation of the AC power will still have a serious impact on the equipment. Therefore, how to accurately monitor the fluctuation of the AC power becomes a technical difficulty.

[0004] The difficulty lies not in how to detect the voltage and current of AC power, but in how to ensure the real-time upload of the detection information, that is, the continuous stability of AC power monitoring. In the existing technology, this aspect is often implemented with complex equipment and is costly.

[0005] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a power monitoring management and early warning system that can perform real-time and accurate detection of the alternating current of industrial equipment, and can promptly perform overvoltage and overcurrent protection. Moreover, during the detection process, it can timely upload information and detect the operating status of the equipment itself, thereby effectively ensuring the stability of the entire system.

[0007] The present invention provides an electric power monitoring management and early warning system, comprising a monitoring unit, a central control unit, an execution unit, a power supply unit and a remote unit;

[0008] The monitoring unit includes a current detection module, a voltage detection module and an analog-to-digital conversion module;

[0009] The current detection module is used to detect the alternating current and output it to the analog-to-digital conversion module, and the voltage detection module is used to detect the voltage of the alternating current and output it to the analog-to-digital conversion module; the output end of the analog-to-digital conversion module is connected to the input end of the central control unit;

[0010] The central control unit receives the detection signals output by the current detection module and the voltage detection module to control the execution unit to act, and the central control unit is connected to the remote monitoring unit for communication and transmits the current detection information and the voltage detection information to the remote unit;

[0011] The execution unit receives the control command from the central control unit to execute the opening and closing actions of the power supply;

[0012] The power supply unit is used to convert alternating current into direct current and provide working direct current to the analog-to-digital conversion module and the central control unit.

[0013] Further, the current detection module includes a current transformer, a first rectifier circuit and a current sampling circuit;

[0014] The current transformer is arranged in an AC line, the output end of the current transformer is connected to the input end of the first rectifier circuit, the output end of the first rectifier circuit is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the analog-to-digital conversion module.

[0015] Further, the voltage detection module includes a voltage transformer, a second rectifier circuit and a voltage sampling circuit;

[0016] The voltage transformer is arranged in the AC line, the output end of the voltage transformer is connected to the input end of the second rectifier circuit, the output end of the second rectifier circuit is connected to the input end of the voltage sampling circuit, and the output end of the voltage sampling circuit is connected to the input end of the analog-to-digital conversion module.

[0017] Furthermore, the central control unit includes a single chip microcomputer, a transmission module and a memory;

[0018] The input end of the single chip microcomputer is connected to the output end of the analog-to-digital conversion module, the single chip microcomputer is communicatively connected to the remote unit via the transmission module, and the single chip microcomputer is communicatively connected to the memory.

[0019] Furthermore, the power supply module includes a transformer T1, a rectifier circuit ZL1, an isolation circuit, a front-end protection circuit, a voltage stabilizing circuit, a lithium battery and a control switch;

[0020] The primary winding of the transformer is connected to the AC line, the secondary winding of the transformer is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the input end of the isolation circuit, the output end of the isolation circuit is connected to the input end of the front-end protection circuit, the output end of the front-end protection circuit is connected to the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power to the central control unit and the analog-to-digital conversion module;

[0021] The positive electrode of the lithium battery is connected to the input end of the control switch, the output end of the control switch is connected to the input end of the voltage stabilizing circuit, and the control end of the control switch is connected to the output end of the front-end protection circuit.

[0022] Furthermore, the front-end protection circuit includes a MOS tube M1, a protection control circuit, an overcurrent detection circuit and a MOS tube control circuit;

[0023] The protection control circuit is used to detect whether the output voltage of the isolation circuit is overvoltage and whether the output side of the front-end protection circuit is overcurrent, and output a control command to the MOS switch control circuit to control the MOS tube M1 to be turned off when there is overvoltage or overcurrent;

[0024] The MOS tube control circuit is used to control the on and off of the MOS tube M1.

[0025] Further, the protection control circuit includes a resistor R13, a resistor R1, a resistor R2, a resistor R5, a resistor R6, a resistor R7, a resistor R10, a resistor R11, a voltage regulator D1, a capacitor C2, a capacitor C5, a comparator U1, a controllable precision voltage regulator U3 and an inductor L1;

[0026] One end of the resistor R13 is connected to the output end of the isolation circuit, the other end of the resistor R13 is connected in series with the resistor R1 and the resistor R5 and then grounded, the common connection point of the resistor R13 and the resistor R1 is connected to the source of the MOS tube M1, the common connection point of the resistor R13 and the resistor R1 is grounded through the capacitor C2, the common connection point of the resistor R1 and the resistor R5 is connected to the inverting end of the comparator U1, the positive electrode of the controllable precision voltage-stabilizing source U3 is grounded, the reference machine of the controllable precision voltage-stabilizing source U3 is connected to the common connection point between the resistor R1 and the resistor R5 through the resistor R6, the negative electrode of the controllable precision voltage-stabilizing source U3 is connected to the common connection point of the resistor R13 and the resistor R1 through the resistor R2, the non-inverting end of the comparator U1 is connected to the negative electrode of the controllable precision voltage-stabilizing source U3, the output end of the comparator U3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the first control end of the MOS tube control circuit;

[0027] One end of the inductor L1 is connected to the drain of the MOS tube M1, the other end of the inductor L1 is connected to the negative electrode of the voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is grounded through the resistor R10, the positive electrode of the voltage regulator tube D1 is grounded through the capacitor C5, the positive electrode of the voltage regulator tube D1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the second control end of the MOS tube M1, and the common connection point between the inductor L1 and the negative electrode of the voltage regulator tube D1 is connected to the input end of the voltage stabilization circuit;

[0028] The comparator U1 is also connected to the detection input terminal of the central control unit through the resistor R7.

[0029] Further, the MOS tube control circuit includes a resistor R3, a resistor R4, a resistor R8, a resistor R9, a resistor R12, a transistor T1, a transistor T2, a capacitor C3, a capacitor C4 and a thyristor Q1;

[0030] One end of the resistor R3 is connected to the source of the MOS tube M1, the other end of the resistor R3 is connected to one end of the resistor R12 through the resistor R8, the other end of the resistor R12 is connected to the base of the transistor T2, the collector of the transistor T2 is connected to the gate of the MOS tube M1 through the resistor R9, the gate of the MOS tube M1 is connected to the source of the MOS tube M1 through the resistor R4, the emitter of the transistor T2 is grounded, the common connection point between the resistor R3 and the resistor R8 is grounded through the capacitor C3, the collector of the transistor T1 is connected to the common connection point between the resistor R3 and the resistor R8, the emitter of the transistor T1 is grounded, and the base of the transistor T1 serves as the first control end of the MOS tube control circuit;

[0031] The positive electrode of the thyristor Q1 is connected to the common connection point between the resistor R8 and the resistor R12, the negative electrode of the thyristor Q1 is connected to the positive electrode of the light-emitting diode LED1, the negative electrode of the light-emitting diode LED1 is grounded, and the control electrode of the thyristor Q1 serves as the second control terminal of the MOS tube control circuit;

[0032] One end of the capacitor C4 is connected to the drain of the MOS tube M1 , and the other end is grounded.

[0033] Further, the remote unit includes a monitoring host, a touch display, a storage server and an audible and visual alarm;

[0034] The monitoring host is connected to the central control unit for communication, the monitoring host is connected to the touch display and the storage server for communication, and the control output end of the monitoring host is connected to the input end of the sound and light alarm.

[0035] Beneficial effects of the present invention: Through the present invention, the alternating current of industrial equipment can be detected in real time and accurately, and overvoltage and overcurrent protection can be performed in time. Moreover, during the detection process, information can be uploaded in time and the operation status of the detection equipment itself can be detected, thereby effectively ensuring the stability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0037] Figure 1 It is a structural schematic diagram of the present invention.

[0038] Figure 2 It is the schematic diagram of the front-end protection circuit of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0040] The present invention provides an electric power monitoring management and early warning system, comprising a monitoring unit, a central control unit, an execution unit, a power supply unit and a remote unit;

[0041] The monitoring unit includes a current detection module, a voltage detection module and an analog-to-digital conversion module;

[0042] The current detection module is used to detect the alternating current and output it to the analog-to-digital conversion module, and the voltage detection module is used to detect the voltage of the alternating current and output it to the analog-to-digital conversion module; the output end of the analog-to-digital conversion module is connected to the input end of the central control unit;

[0043] The central control unit receives the detection signals output by the current detection module and the voltage detection module to control the execution unit to act, and the central control unit is connected to the remote monitoring unit for communication and transmits the current detection information and the voltage detection information to the remote unit;

[0044] The execution unit receives the control command of the central control unit to execute the opening and closing actions of the power supply; wherein the execution unit is implemented by an existing intelligent circuit breaker or contactor, which belongs to the prior art;

[0045] The power supply unit is used to convert AC power into DC power and provide working DC power to the analog-to-digital conversion module and the central control unit; wherein the analog-to-digital conversion module adopts the HX711 series analog-to-digital conversion module, which has two channels corresponding to voltage signals and current signals respectively; through the above structure, the AC power of industrial equipment can be detected in real time and accurately, and overvoltage and overcurrent protection can be performed in time, and in the detection process, information can be uploaded in time and the operation status of the detection equipment itself can be detected, thereby effectively ensuring the stability of the entire system.

[0046] In this embodiment, the current detection module includes a current transformer, a first rectifier circuit and a current sampling circuit;

[0047] The current transformer is arranged in an AC line, the output end of the current transformer is connected to the input end of the first rectifier circuit, the output end of the first rectifier circuit is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the analog-to-digital conversion module.

[0048] The voltage detection module includes a voltage transformer, a second rectifier circuit and a voltage sampling circuit;

[0049] The voltage transformer is arranged in an AC line, the output end of the voltage transformer is connected to the input end of the second rectifier circuit, the output end of the second rectifier circuit is connected to the input end of the voltage sampling circuit, and the output end of the voltage sampling circuit is connected to the input end of the analog-to-digital conversion module; wherein, the first rectifier circuit and the second rectifier circuit adopt a full-bridge rectifier circuit composed of existing diodes, and the current sampling circuit and the voltage sampling circuit adopt existing sampling circuits, wherein: the current sampling circuit includes a filter circuit and a voltage divider sampling circuit; the voltage sampling circuit includes a filter circuit and a voltage divider sampling circuit, and these circuits are all existing technologies and will not be described in detail here.

[0050] In this embodiment, the central control unit includes a single chip microcomputer, a transmission module and a memory;

[0051] The input end of the single-chip microcomputer is connected to the output end of the analog-to-digital conversion module, the single-chip microcomputer is communicatively connected to the remote unit through the transmission module, and the single-chip microcomputer is communicatively connected to the memory; wherein the single-chip microcomputer adopts an existing single-chip microcomputer, such as an STM32 series single-chip microcomputer, and the transmission module adopts existing modules such as an Ethernet interface and a 5G module.

[0052] In this embodiment, the power supply module includes a transformer T1, a rectifier circuit ZL1, an isolation circuit, a front-end protection circuit, a voltage stabilization circuit, a lithium battery and a control switch;

[0053] The primary winding of the transformer is connected to the AC line, the secondary winding of the transformer is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the input end of the isolation circuit, the output end of the isolation circuit is connected to the input end of the front-end protection circuit, the output end of the front-end protection circuit is connected to the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power to the central control unit and the analog-to-digital conversion module;

[0054] The positive electrode of the lithium battery is connected to the input end of the control switch, the output end of the control switch is connected to the input end of the voltage stabilizing circuit, and the control end of the control switch is connected to the output end of the front-end protection circuit. Through the above structure, continuous and stable working power can be provided to each electrical device, thereby ensuring the continuity and stability of the detection process; wherein, the control switch is implemented by the existing NMOS tube and N-type transistor. Of course, the lithium battery is equipped with a charging management circuit for performing corresponding charging and discharging management of the lithium battery, which belongs to the prior art; the voltage stabilizing circuit adopts the existing voltage stabilizing circuit, such as LM2596, LM7812, etc., which is selected according to the rated voltage of the electrical device, and there can be multiple ones.

[0055] In this embodiment, the front-end protection circuit includes a MOS tube M1, a protection control circuit, an overcurrent detection circuit and a MOS tube control circuit; wherein the MOS tube M1 is a P-type MOS tube;

[0056] The protection control circuit is used to detect whether the output voltage of the isolation circuit is overvoltage and whether the output side of the front-end protection circuit is overcurrent, and output a control command to the MOS switch control circuit to control the MOS tube M1 to be turned off when there is overvoltage or overcurrent;

[0057] The MOS tube control circuit is used to control the on and off of the MOS tube M1.

[0058] Specifically: the protection control circuit includes a resistor R13, a resistor R1, a resistor R2, a resistor R5, a resistor R6, a resistor R7, a resistor R10, a resistor R11, a voltage regulator D1, a capacitor C2, a capacitor C5, a comparator U1, a controllable precision voltage regulator U3 and an inductor L1;

[0059] One end of the resistor R13 is connected to the output end of the isolation circuit, the other end of the resistor R13 is connected in series with the resistor R1 and the resistor R5 and then grounded, the common connection point of the resistor R13 and the resistor R1 is connected to the source of the MOS tube M1, the common connection point of the resistor R13 and the resistor R1 is grounded through the capacitor C2, the common connection point of the resistor R1 and the resistor R5 is connected to the inverting end of the comparator U1, the positive electrode of the controllable precision voltage-stabilizing source U3 is grounded, the reference machine of the controllable precision voltage-stabilizing source U3 is connected to the common connection point between the resistor R1 and the resistor R5 through the resistor R6, the negative electrode of the controllable precision voltage-stabilizing source U3 is connected to the common connection point of the resistor R13 and the resistor R1 through the resistor R2, the non-inverting end of the comparator U1 is connected to the negative electrode of the controllable precision voltage-stabilizing source U3, the output end of the comparator U3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the first control end of the MOS tube control circuit;

[0060] One end of the inductor L1 is connected to the drain of the MOS tube M1, the other end of the inductor L1 is connected to the negative electrode of the voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is grounded through the resistor R10, the positive electrode of the voltage regulator tube D1 is grounded through the capacitor C5, the positive electrode of the voltage regulator tube D1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the second control end of the MOS tube M1, and the common connection point between the inductor L1 and the negative electrode of the voltage regulator tube D1 is connected to the input end of the voltage stabilization circuit;

[0061] The comparator U1 is also connected to the detection input terminal of the central control unit through the resistor R7.

[0062] The MOS tube control circuit includes a resistor R3, a resistor R4, a resistor R8, a resistor R9, a resistor R12, a transistor T1, a transistor T2, a capacitor C3, a capacitor C4 and a thyristor Q1;

[0063] One end of the resistor R3 is connected to the source of the MOS tube M1, the other end of the resistor R3 is connected to one end of the resistor R12 through the resistor R8, the other end of the resistor R12 is connected to the base of the transistor T2, the collector of the transistor T2 is connected to the gate of the MOS tube M1 through the resistor R9, the gate of the MOS tube M1 is connected to the source of the MOS tube M1 through the resistor R4, the emitter of the transistor T2 is grounded, the common connection point between the resistor R3 and the resistor R8 is grounded through the capacitor C3, the collector of the transistor T1 is connected to the common connection point between the resistor R3 and the resistor R8, the emitter of the transistor T1 is grounded, and the base of the transistor T1 serves as the first control end of the MOS tube control circuit;

[0064] The positive electrode of the thyristor Q1 is connected to the common connection point between the resistor R8 and the resistor R12, the negative electrode of the thyristor Q1 is connected to the positive electrode of the light-emitting diode LED1, the negative electrode of the light-emitting diode LED1 is grounded, and the control electrode of the thyristor Q1 serves as the second control terminal of the MOS tube control circuit;

[0065] One end of the capacitor C4 is connected to the drain of the MOS tube M1 , and the other end is grounded.

[0066] In this embodiment, the remote unit includes a monitoring host, a touch display, a storage server, and an audible and visual alarm;

[0067] The monitoring host is connected to the central control unit in communication, the monitoring host is connected to the touch display and the storage server in communication, the control output end of the monitoring host is connected to the input end of the sound and light alarm, the monitoring host displays the real-time uploaded information through the touch display, and issues an alarm through the sound and light alarm when there is AC overvoltage or overcurrent.

[0068] In order to facilitate understanding and implementation, the principle is further described below:

[0069] For the monitoring and early warning of AC power itself:

[0070] After the current detection module and the voltage detection module collect the voltage and current signals of the AC line, they are processed by the analog-to-digital conversion module and then input into the single-chip microcomputer. The single-chip microcomputer compares and calculates the voltage and current information accordingly to determine whether their fluctuations are greater than the set value. If so, the control execution unit performs the tripping action to protect the electrical equipment. The single-chip microcomputer also transmits real-time monitoring information to the monitoring host. If the voltage or current fluctuation is greater than the set value, a corresponding alarm signal is generated, and the monitoring host issues an alarm through the sound and light alarm.

[0071] For the working part of the power supply module:

[0072] Transformer T1 steps down the AC power, rectifies it into DC through rectifier circuit ZL1, and then inputs it into the front-end protection circuit through the isolation circuit. The isolation circuit adopts the existing voltage follower and realizes isolation through the high impedance characteristics of the voltage follower.

[0073] When the voltage is normal, transistor T2 is turned on, MOS tube M1 is turned on, and power is supplied to subsequent devices;

[0074] Resistors R1 and R5 perform overvoltage sampling. When the real-time voltage is greater than the set voltage (the set voltage is set by the controllable precision voltage regulator U3), the comparator outputs a high level, the transistor T1 is turned on, and the transistor T2 is turned off, the MOS tube M1 is turned off, and the online power supply is stopped. At this time, the high level output by the comparator U1 turns on the control switch, and the battery supplies power. The single-chip microcomputer receives the high level output by the comparator U1, and feeds back to the monitoring host the loop where the monitoring device is located to perform overvoltage protection. In addition, the number of times the comparator U1 outputs a high level can reflect the number of times the lithium battery is discharged, thereby evaluating the life of the lithium battery.

[0075] Inductor L1 is used to detect whether the subsequent electrical devices are short-circuited. When the subsequent devices or circuits are short-circuited, the current increases, and the right end of L1 will sense high voltage, causing the voltage regulator D1 to turn on, thereby controlling the thyristor Q1 to turn on, the transistor T2 to turn off, the MOS tube M1 to turn off, and the power supply is stopped. At this time, the light-emitting diode LED1 lights up, indicating that a device failure has occurred.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An electric power monitoring management and early warning system, characterized in that: include: Monitoring unit, central control unit, execution unit, power supply unit and remote unit; The monitoring unit includes a current detection module, a voltage detection module and an analog-to-digital conversion module; The current detection module is used to detect the alternating current and output it to the analog-to-digital conversion module, and the voltage detection module is used to detect the voltage of the alternating current and output it to the analog-to-digital conversion module; the output end of the analog-to-digital conversion module is connected to the input end of the central control unit; The central control unit receives the detection signals output by the current detection module and the voltage detection module to control the execution unit to act, and the central control unit is connected to the remote monitoring unit for communication and transmits the current detection information and the voltage detection information to the remote unit; The execution unit receives the control command from the central control unit to execute the opening and closing actions of the power supply; The power supply unit is used to convert AC power into DC power and provide working DC power to the analog-to-digital conversion module and the central control unit; The current detection module includes a current transformer, a first rectifier circuit and a current sampling circuit; The current transformer is arranged in an AC line, the output end of the current transformer is connected to the input end of the first rectifier circuit, the output end of the first rectifier circuit is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the analog-to-digital conversion module; The power supply unit includes a transformer T1, a rectifier circuit ZL1, an isolation circuit, a front-end protection circuit, a voltage stabilization circuit, a lithium battery and a control switch; The primary winding of the transformer is connected to the AC line, the secondary winding of the transformer is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the input end of the isolation circuit, the output end of the isolation circuit is connected to the input end of the front-end protection circuit, the output end of the front-end protection circuit is connected to the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power to the central control unit and the analog-to-digital conversion module; The positive electrode of the lithium battery is connected to the input end of the control switch, the output end of the control switch is connected to the input end of the voltage stabilizing circuit, and the control end of the control switch is connected to the output end of the front-end protection circuit; The front-end protection circuit includes a MOS tube M1, a protection control circuit, an overcurrent detection circuit and a MOS tube control circuit; The protection control circuit is used to detect whether the output voltage of the isolation circuit is overvoltage and whether the output side of the front-end protection circuit is overcurrent, and output a control command to the MOS tube control circuit to control the MOS tube M1 to turn off when there is overvoltage or overcurrent; The MOS tube control circuit is used to control the on and off of the MOS tube M1; The protection control circuit includes a resistor R13, a resistor R1, a resistor R2, a resistor R5, a resistor R6, a resistor R7, a resistor R10, a resistor R11, a voltage regulator D1, a capacitor C2, a capacitor C5, a comparator U1, a controllable precision voltage regulator U3 and an inductor L1; One end of the resistor R13 is connected to the output end of the isolation circuit, the other end of the resistor R13 is connected in series with the resistor R1 and the resistor R5 and then grounded, the common connection point of the resistor R13 and the resistor R1 is connected to the source of the MOS tube M1, the common connection point of the resistor R13 and the resistor R1 is grounded through the capacitor C2, the common connection point of the resistor R1 and the resistor R5 is connected to the inverting end of the comparator U1, the positive electrode of the controllable precision voltage-stabilizing source U3 is grounded, the reference machine of the controllable precision voltage-stabilizing source U3 is connected to the common connection point between the resistor R1 and the resistor R5 through the resistor R6, the negative electrode of the controllable precision voltage-stabilizing source U3 is connected to the common connection point of the resistor R13 and the resistor R1 through the resistor R2, the non-inverting end of the comparator U1 is connected to the negative electrode of the controllable precision voltage-stabilizing source U3, the output end of the comparator U3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the first control end of the MOS tube control circuit; One end of the inductor L1 is connected to the drain of the MOS tube M1, the other end of the inductor L1 is connected to the negative electrode of the voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is grounded through the resistor R10, the positive electrode of the voltage regulator tube D1 is grounded through the capacitor C5, the positive electrode of the voltage regulator tube D1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the second control end of the MOS tube M1, and the common connection point between the inductor L1 and the negative electrode of the voltage regulator tube D1 is connected to the input end of the voltage stabilization circuit; The comparator U1 is also connected to the detection input terminal of the central control unit through the resistor R7.

2. The power monitoring management and early warning system according to claim 1 is characterized in that: The voltage detection module includes a voltage transformer, a second rectifier circuit and a voltage sampling circuit; The voltage transformer is arranged in the AC line, the output end of the voltage transformer is connected to the input end of the second rectifier circuit, the output end of the second rectifier circuit is connected to the input end of the voltage sampling circuit, and the output end of the voltage sampling circuit is connected to the input end of the analog-to-digital conversion module.

3. The power monitoring management and early warning system according to claim 1 is characterized in that: The central control unit includes a single chip microcomputer, a transmission module and a memory; The input end of the single chip microcomputer is connected to the output end of the analog-to-digital conversion module, the single chip microcomputer is communicatively connected to the remote unit via the transmission module, and the single chip microcomputer is communicatively connected to the memory.

4. The power monitoring management and early warning system according to claim 1 is characterized in that: The MOS tube control circuit includes a resistor R3, a resistor R4, a resistor R8, a resistor R9, a resistor R12, a transistor T1, a transistor T2, a capacitor C3, a capacitor C4 and a thyristor Q1; One end of the resistor R3 is connected to the source of the MOS tube M1, the other end of the resistor R3 is connected to one end of the resistor R12 through the resistor R8, the other end of the resistor R12 is connected to the base of the transistor T2, the collector of the transistor T2 is connected to the gate of the MOS tube M1 through the resistor R9, the gate of the MOS tube M1 is connected to the source of the MOS tube M1 through the resistor R4, the emitter of the transistor T2 is grounded, the common connection point between the resistor R3 and the resistor R8 is grounded through the capacitor C3, the collector of the transistor T1 is connected to the common connection point between the resistor R3 and the resistor R8, the emitter of the transistor T1 is grounded, and the base of the transistor T1 serves as the first control end of the MOS tube control circuit; The positive electrode of the thyristor Q1 is connected to the common connection point between the resistor R8 and the resistor R12, the negative electrode of the thyristor Q1 is connected to the positive electrode of the light-emitting diode LED1, the negative electrode of the light-emitting diode LED1 is grounded, and the control electrode of the thyristor Q1 serves as the second control terminal of the MOS tube control circuit; One end of the capacitor C4 is connected to the drain of the MOS tube M1 , and the other end is grounded.

5. The power monitoring management and early warning system according to claim 1 is characterized in that: The remote unit includes a monitoring host, a touch display, a storage server and an audible and visual alarm; The monitoring host is connected to the central control unit for communication, the monitoring host is connected to the touch display and the storage server for communication, and the control output end of the monitoring host is connected to the input end of the sound and light alarm.

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