A voltage detection controller

Abstract

The utility model relates to the electrical technical field, and specifically is a voltage detection controller, through the acquisition operation bus section PT cabinet in the voltage mutual inductor secondary data value, access HV+, HV- wiring terminal of electric circuit, through amplification device ADI, double operational amplifier N4 and double operational amplifier N2 signal processing, by photoelectric coupler N3, relay N1, field effect tube Q1 and pulse transformer T1 output switch quantity signal node S1+, S1-, will switch quantity signal node access capacitor switch cabinet in high voltage switch electrical closing circuit, control capacitor high voltage switch closing, realize the automatic input of electric capacity.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically a voltage detection controller. Background Technology

[0002] Currently, factory substations and transmission lines are becoming increasingly complex, making real-time monitoring of voltage fluctuations and maintaining stable voltage operation extremely important. At present, substations are equipped with corresponding capacitor compensation devices. When voltage changes, manual intervention is required to activate the capacitor compensation devices to maintain bus voltage stability and thus ensure the normal power supply of the power system. However, factory substations experience significant load variations, and manual operation has limitations; untimely operation is detrimental to the safety and stability of the power grid. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a voltage detection controller.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A voltage detection controller includes a power supply module, a voltage acquisition module, a signal amplification and comparison module, and a control output module; wherein, The power supply module includes a lightning protection and anti-interference circuit, a filtering circuit, and a rectifier and voltage regulator circuit; it is used to output a stable DC voltage from the input power supply to power the electrical components in the voltage detection controller. The voltage acquisition module includes a voltage transformer, a diode rectifier bridge, and an RC filter circuit. The voltage transformer converts the primary high voltage of the PT cabinet on the high voltage bus of the substation into a secondary voltage, which is then converted into a stable voltage signal by the diode rectifier bridge and the RC filter circuit. The signal amplification and comparison module includes potentiometer RP2, amplification device ADI, dual operational amplifier N4, and dual operational amplifier N2; the voltage reference value is preset through potentiometer RP2, and the voltage signal is sequentially processed by amplification device ADI, dual operational amplifier N4, and dual operational amplifier N2 to complete signal amplification-voltage tracking-threshold comparison. The control output module includes an optocoupler N3, a relay N1, a field-effect transistor Q1, and a pulse transformer T1. The signal after comparison processing is amplified sequentially by the optocoupler N3, the relay N1, the field-effect transistor Q1, and the pulse transformer T1, and then outputs a switching signal to control the automatic activation of the capacitor reactive power compensation device.

[0005] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: The voltage detection controller collects the secondary data values ​​of the voltage transformers in the PT cabinet of the operating bus section, connects them to the HV+ and HV- terminals of the electrical circuit, and outputs switch signal nodes S1+ and S1- after signal processing. The switch signal nodes are then connected to the high-voltage switch electrical closing circuit in the capacitor switch cabinet to control the closing of the capacitor high-voltage switch and realize the automatic connection of the capacitor. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the electrical principle of the power supply section in an embodiment of this utility model; Figure 2 This is a schematic diagram of the electrical principle of the acquisition and control section in an embodiment of this utility model. Detailed Implementation

[0007] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0008] like Figures 1 to 2 As shown in the figure, this embodiment provides a voltage detection controller, including a power supply module, a voltage acquisition module, a signal amplification and comparison module, and a control output module; wherein, The power supply module includes a lightning protection and anti-interference circuit, a filtering circuit, and a rectifier and voltage regulator circuit; it is used to output a stable DC voltage from the input power supply to power the electrical components in the voltage detection controller. The voltage acquisition module includes a voltage transformer, a diode rectifier bridge, and an RC filter circuit. The voltage transformer converts the primary high voltage of the PT cabinet on the high voltage bus of the substation into a secondary voltage, which is then converted into a stable voltage signal by the diode rectifier bridge and the RC filter circuit. The signal amplification and comparison module includes potentiometer RP2, amplification device ADI, dual operational amplifier N4, and dual operational amplifier N2; the voltage reference value is preset through potentiometer RP2, and the voltage signal is sequentially processed by amplification device ADI, dual operational amplifier N4, and dual operational amplifier N2 to complete signal amplification-voltage tracking-threshold comparison. The control output module includes an optocoupler N3, a relay N1, a field-effect transistor Q1, and a pulse transformer T1. The signal after comparison processing is amplified sequentially by the optocoupler N3, the relay N1, the field-effect transistor Q1, and the pulse transformer T1, and then outputs a switching signal to control the automatic activation of the capacitor reactive power compensation device.

[0009] In implementation, the lightning protection and anti-interference circuit includes capacitor CX2, varistor RV1, overvoltage discharge tube FD1, varistor RV3, and varistor RV2; the first terminal of capacitor CX2 is connected to the positive terminal of the input power supply, and the second terminal is connected to the negative terminal of the input power supply; the first terminal of varistor RV1 is connected to the positive terminal of the power supply, and the second terminal is connected to the first terminal of the overvoltage discharge tube FD1, with the second terminal of the overvoltage discharge tube FD1 connected to the protective grounding point PE; the first terminal of varistor RV3 is connected to the first terminal of the overvoltage discharge tube FD1, and the second terminal is connected to the negative terminal of the power supply; the first terminal of varistor RV2 is connected to the positive terminal of the power supply, and the second terminal is connected to the negative terminal of the power supply. The filter circuit includes a common-mode inductor A2, safety capacitors Y1 and Y2, a common-mode inductor A3, and a capacitor CX1. The first terminal of common-mode inductor A2 is connected to the first terminal of varistor RV2, and the second terminal is connected to the second terminal of varistor RV2. The third terminal of common-mode inductor A2 is connected to the first terminal of safety capacitor Y1, and the second terminal of safety capacitor Y1 is connected to the protective ground point PE. The fourth terminal of common-mode inductor A2 is connected to the first terminal of safety capacitor Y2, and the second terminal of safety capacitor Y2 is connected to the second terminal of safety capacitor Y1, and both terminals are connected to the protective ground point PE. The first terminal of common-mode inductor A3 is connected to the first terminal of safety capacitor Y1, and the second terminal is connected to the first terminal of safety capacitor Y2. The third terminal of common-mode inductor A3 is connected to the first terminal of capacitor CX1, and the fourth terminal is connected to the second terminal of capacitor CX1. The rectifier and voltage regulator circuit includes a bridge rectifier circuit KBU10, capacitors C1, C2, and C3, a thermistor RT1, a power module A1, a diode V1, capacitors C5 and C4. The first terminal of capacitor CX1 is connected to the first terminal of the bridge rectifier circuit KBU10, and the second terminal of capacitor CX1 is connected to the third terminal of the bridge rectifier circuit KBU10. The second terminal of the bridge rectifier circuit KBU10 is connected to the positive terminal of capacitor C1, and the fourth terminal is connected to the negative terminal of capacitor C1. The positive terminal of capacitor C1 is connected to the positive terminal of capacitor C2, and the negative terminal of capacitor C1 is connected to the negative terminal of capacitor C2. The positive terminal of capacitor C2 is connected to the positive terminal of capacitor C3, and the negative terminal of capacitor C2 is connected to the negative terminal of capacitor C3. Negative terminal; The first terminal of thermistor RT1 is connected to the positive terminal of capacitor C3, and the second terminal is connected to the N terminal of power module A1. The negative terminal of capacitor C3 is connected to the N terminal of power module A1. The +15V output terminal of power module A1 is connected to the anode of diode V1. The cathode of diode V1 is connected to the first terminal of capacitor C5. The second terminal of capacitor C5 is connected to the 0V output terminal of power module A1. The positive terminal of capacitor C4 is connected to the first terminal of capacitor C5. The negative terminal of capacitor C4 is connected to the second terminal of capacitor C5, and the negative terminal of capacitor C4 is grounded. The positive terminal of capacitor C4 is connected to the first terminal of resistor R1. The second terminal of resistor R1 is connected to the anode of LED1. The cathode of LED1 is grounded.

[0010] Varistors RV1, RV2, RV3 and overvoltage discharge tube FD1 form a lightning and overvoltage protection circuit. When the input voltage rises suddenly, the resistance of the varistor drops suddenly and the overvoltage discharge tube breaks down, diverting the overvoltage current to the protective ground PE to prevent component damage. Common-mode inductors A2 and A3 and safety capacitors Y1, Y2, and CX1 filter out common-mode interference (such as grid noise) in the power supply to ensure power purity.

[0011] The bridge rectifier circuit KBU10 converts AC power to DC; capacitors C1-C3 form a filter circuit to smooth DC voltage fluctuations; power module A1 converts the filtered DC voltage to a stable +15V voltage, which is then filtered twice by diode V1 and capacitors C4 and C5 to provide stable power to subsequent circuits; thermistor RT1 provides overcurrent protection, increasing its resistance when the current is too high, thus limiting the loop current.

[0012] In implementation, the voltage acquisition module specifically includes external voltage terminals HV+ and HV-, a voltage transformer, a switching button S1, a diode rectifier bridge, and an RC filter circuit; the external voltage terminal HV+ is connected to the first terminal of the primary coil of the voltage transformer, and the external voltage terminal HV- is connected to the second terminal of the primary coil of the voltage transformer; the second terminal of the secondary coil of the voltage transformer is connected to the 11th terminal of the amplifier ADI, the first terminal of the secondary coil of the voltage transformer is connected to the first terminal of the switching button S1, and the second terminal of the switching button S1 is connected to the 12th terminal of the amplifier ADI and simultaneously grounded, forming the grounding point GND; The diode rectifier bridge consists of diodes V10, V11, V12, and V13. The second terminal of the secondary coil of the voltage transformer is connected to the anode of diode V12, the anode of diode V12 is connected to the cathode of diode V13, the anode of diode V13 is connected to the anode of diode V11, the cathode of diode V11 is connected to the anode of diode V10, the cathode of diode V10 is connected to the cathode of diode V12, and the first terminal of the secondary coil of the voltage transformer is connected to the anode of diode V10. The RC filter circuit includes resistor R19, capacitor C16, resistor R18, and capacitor C15. The first terminal of resistor R19 is connected to the cathode of diode V10, and the second terminal is connected to the anode of diode V11. The first terminal of capacitor C16 is connected to the first terminal of resistor R19, and the second terminal is connected to the second terminal of resistor R19 and grounded. The first terminal of resistor R18 is connected to the first terminal of capacitor C16, and the first terminal of capacitor C15 is connected to the second terminal of resistor R18. The second terminal of capacitor C15 is grounded.

[0013] A voltage transformer (PT) steps down the primary voltage (e.g., 10kV) of a high-voltage bus to a secondary voltage (e.g., 100V), preventing high voltage from directly damaging components in the controller. External terminals HV+ and HV- connect to the primary coil of the voltage transformer, and the secondary voltage output from the secondary coil is connected to subsequent circuits.

[0014] Diodes V10-V13 form a rectifier bridge to convert the secondary AC voltage into DC voltage; resistor R19 and capacitor C16 form an RC filter circuit to initially filter out high-frequency noise in the DC signal; resistor R18 and capacitor C15 further filter the signal to output a stable DC voltage signal, providing a clean input signal for the subsequent amplifier circuit.

[0015] In practice, the signal amplification and comparison module specifically includes an amplification device ADI, potentiometer RP2, dual operational amplifier N4, potentiometer RP1, dual operational amplifier N2, resistor R20, capacitor C17, resistor R21, resistor R22, resistor R16, resistor R11, resistor R8, resistor R15, light-emitting diode LED3, resistor R17, Zener diode V8, diode V9, and resistor R12. Connect the 9th terminal of the Amplifier ADI to the first terminal of resistor R20; connect the second terminal of resistor R20 to the 8th terminal of the Amplifier ADI; connect the first terminal of resistor R20 to the first terminal of capacitor C17; connect the 5th terminal of the Amplifier ADI to the first terminal of capacitor C17; connect the 1st terminal of the Amplifier ADI to the second terminal of capacitor C17 and ground; connect the 15th terminal of the Amplifier ADI to the 2nd terminal of the Amplifier ADI; connect the 2nd terminal of the Amplifier ADI to the first terminal of resistor R21; connect the second terminal of resistor R21 to ground; connect the first terminal of resistor R22 to the first terminal of resistor R21; connect the second terminal to the external voltage terminal HV+; connect the left end of potentiometer RP2 to the +12V power supply, the right end to ground, and the middle end to the 16th terminal of the Amplifier ADI. The first terminal of the dual operational amplifier N4 is connected to the second terminal and together they are connected to the first terminal of resistor R16; the third terminal of the dual operational amplifier N4 is connected to the first terminal of capacitor C15, and the fourth terminal is grounded; the fifth terminal of the dual operational amplifier N4 is connected to the second terminal of capacitor C8, and the sixth terminal is connected to the seventh terminal and together they are connected to the first terminal of resistor R11; the eighth terminal of the dual operational amplifier N4 is connected to the second terminal of capacitor C10, and the eighth terminal of the dual operational amplifier N4 and the second terminal of capacitor C10 are simultaneously connected to a +12V power supply, and the first terminal of capacitor C10 is grounded; the first terminal of capacitor C8 is connected to the cathode of diode V6, and the first terminal of capacitor C8 and the cathode of diode V6 are simultaneously grounded; the second terminal of capacitor C8 is connected to the middle terminal of potentiometer RP1, the left end of potentiometer RP1 is connected to the anode of diode V6, and the right end is connected to a +12V power supply; The first terminal of resistor R8 is connected to the second terminal of resistor R11, which in turn is connected to the first and sixth terminals of the dual operational amplifier N2. The second terminal of the dual operational amplifier N2 is connected to the second terminal of resistor R11, the third terminal is connected to the second terminal of resistor R16, the fourth terminal is grounded, and the fifth terminal is grounded. The seventh terminal of the dual operational amplifier N2 is connected to the first terminal of resistor R15, the second terminal of resistor R15 is connected to the anode of LED3, and the cathode of LED3 is grounded. The eighth terminal of the dual operational amplifier N2 is connected to the first terminal of capacitor C9, and both the eighth terminal of the dual operational amplifier N2 and the first terminal of capacitor C9 are connected to a +12V power supply. The second terminal of capacitor C9 is grounded. The first terminal of resistor R17 is connected to the first terminal of resistor R15, and the second terminal is connected to the cathode of Zener diode V8. The anode of Zener diode V8 is connected to the cathode of diode V9, and the anode of diode V9 is grounded. The first terminal of resistor R12 is connected to the cathode of diode V9, and the second terminal is connected to the anode of diode V9, both of which are grounded.

[0016] The secondary voltage output from the secondary coil of the voltage transformer is connected to terminals 11 and 12 of the ADI. The ADI amplifies the signal initially through its internal circuitry. Resistor R20 and capacitor C17 form an RC circuit to filter out noise in the ADI output signal. Potentiometer RP2 (left end connected to +12V, right end grounded) provides an adjustable reference voltage for the ADI. By adjusting the position of the middle terminal of RP2, the reference threshold for voltage detection (such as the lower limit of the bus voltage) is set. Terminal 2 of the ADI is grounded through resistor R21. At the same time, one end of resistor R22 is connected to R21 and the other end is connected to HV+, forming a reference voltage feedback loop to ensure the stability of the reference threshold voltage.

[0017] N4 primarily performs voltage follower and gain amplification functions. The pre-processed DC signal is input to terminal 3 of N4. Terminals 1 and 2 of N4 are shorted and connected to resistor R16 to form a voltage follower, ensuring that the amplitude remains constant and impedance is matched (to avoid signal attenuation) during signal transmission. At the same time, the signal gain is adjusted through the internal circuitry of N4 so that the signal amplitude meets the requirements of the subsequent comparator circuit. Potentiometer RP1 (with diode V6 connected to the left end and +12V connected to the right end) provides an adjustable bias voltage for N4, further optimizing the signal amplification effect. Terminals 6 and 7 of N4 are shorted and connected to resistor R11. The amplified DC signal is then transmitted to the dual operational amplifier N2 via R11.

[0018] N2 primarily performs voltage comparison and signal decision functions. Terminal 2 of N2 receives the amplified actual voltage signal from N4, and terminal 3 receives the reference voltage signal. An internal comparison circuit determines whether the actual voltage is lower than the reference value: if the actual voltage is lower, N2 outputs a high level; if it is higher, it outputs a low level. The high-level signal drives LED3 via resistor R15, indicating the need for capacitor compensation. Zener diode V8 and resistors R17 and R12 form a voltage regulator circuit to stabilize the output voltage of N2 and prevent misjudgments caused by signal fluctuations.

[0019] In implementation, the control output module specifically includes optocoupler N3, resistor R9, resistor R13, capacitor C11, capacitor C12, relay N1, capacitor C7, resistor R6, resistor R7, field-effect transistor Q1, pulse transformer T1, diode V5, resistor R4, resistor R3, light-emitting diode LED2, diode V2, diode V3, diode V4, resistor R5, and thyristor G; Optocoupler N3's first terminal is connected to the first terminal of resistor R12, and its second terminal is connected to the second terminal of resistor R12; optocoupler N3's fifth terminal is connected to the first terminal of resistor R9, and the second terminal of resistor R9 is connected to a +12V power supply; resistor R13's first terminal is connected to the first terminal of resistor R9, and its second terminal is connected to the first terminal of capacitor C11; optocoupler N3's fourth terminal is connected to the second terminal of capacitor C11; capacitor C12's first terminal is connected to the fifth terminal of relay N1, and its second terminal is connected to the second terminal of capacitor C11 and the first terminal of relay N1; relay N1's second terminal is connected to the first terminal of capacitor C11; relay N1's fourth terminal is connected to the first terminal of capacitor C7 and resistor R12. The first terminal of R6 and the second terminal of capacitor C7 are grounded; the second terminal of resistor R6 is connected to the 8th terminal of relay N1 and the first terminal of resistor R7, and the node is connected to a +12V power supply; the second terminal of resistor R7 is connected to the 7th and 6th terminals of relay N1; the first terminal of capacitor C13 is connected to the 6th terminal of relay N1, and the second terminal is grounded; the positive terminal of capacitor C14 is connected to the 6th terminal of relay N1, and the negative terminal is connected to the second terminal of capacitor C13, and both are grounded; the positive terminal of diode V7 is connected to the 3rd terminal of relay N1, and the negative terminal is connected to the first terminal of resistor R10; the second terminal of resistor R10 is connected to the first terminal of resistor R14, and the second terminal of resistor R14 is grounded; The gate of MOSFET Q1 is connected to the first terminal of resistor R14, the source is grounded, and the drain is connected to the first terminal of pulse transformer T1. The first terminal of pulse transformer T1 is connected to the anode of diode V5, and the cathode of diode V5 is connected to the first terminal of resistor R4. The second terminal of resistor R4 is connected to the first terminal of resistor R3, and the second terminal of resistor R3 is connected to the anode of LED2, with the cathode of LED2 grounded. The anode of capacitor C6 is connected to the second terminal of resistor R4, and the cathode is grounded. The first terminal of resistor R2 is connected to the second terminal of pulse transformer T1, and the second terminal is connected to the cathode of diode V2, with the anode of diode V2 connected to a +12V power supply. The third terminal of pulse transformer T1 is connected to the anode of diode V3, and the cathode of diode V3 is connected to the cathode of diode V4. The anode of diode V4 is connected to the first terminal of resistor R5, and the second terminal of resistor R5 is connected to the cathode of diode V4. Two thyristors G are configured. The first thyristor G has its third terminal connected to the second terminal of resistor R5, its first terminal connected to output point S1+, and its second terminal connected to the first terminal of resistor R5. The second thyristor G has its third terminal connected to the third terminal of the first thyristor G, its first terminal connected to output point S1+, and its second terminal connected to the second terminal of the first thyristor G, and both terminals are connected to output point S1-.

[0020] Optocoupler N3 achieves electrical isolation between the "input signal" and the "output control signal" to prevent high-voltage interference from entering the control circuit; the high-level signal output by N2 drives N3 to conduct, thereby triggering the relay N1 to operate; the relay N1 acts as a switching element, amplifying the control signal and driving the subsequent field-effect transistor circuit.

[0021] The field-effect transistor Q1 is turned on / off under the control of relay N1, controlling the primary coil current of pulse transformer T1. T1 amplifies the control signal into a pulse signal, which is rectified by diodes V3 and V4 and current-limited by resistor R5, driving two parallel thyristors G to conduct. After the thyristors G conduct, they output switching signals (S1+, S1-) to the high-voltage switch closing circuit of the capacitor bank, controlling the high-voltage switch to close and activating the capacitor reactive power compensation device. After the capacitor is activated, it can compensate for the reactive power of the high-voltage bus, raise the bus voltage to the normal range, improve voltage quality, reduce power loss, and avoid grid instability caused by untimely human operation.

[0022] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A voltage detection controller, characterized in that, It includes a power supply module, a voltage acquisition module, a signal amplification and comparison module, and a control output module; among which, The power supply module includes a lightning protection and anti-interference circuit, a filtering circuit, and a rectifier and voltage regulator circuit; it is used to output a stable DC voltage from the input power supply to power the electrical components in the voltage detection controller. The voltage acquisition module includes a voltage transformer, a diode rectifier bridge, and an RC filter circuit. The voltage transformer converts the primary high voltage of the PT cabinet on the high voltage bus of the substation into a secondary voltage, which is then converted into a stable voltage signal by the diode rectifier bridge and the RC filter circuit. The signal amplification and comparison module includes a potentiometer (RP2), an amplification device (ADI), a dual operational amplifier (N4), and a dual operational amplifier (N2). The voltage reference value is preset through the potentiometer (RP2), and the voltage signal is sequentially processed by the amplification device (ADI), the dual operational amplifier (N4), and the dual operational amplifier (N2) to complete the signal amplification-voltage tracking-threshold comparison process. The control output module includes an optocoupler (N3), a relay (N1), a field-effect transistor (Q1), and a pulse transformer (T1). The signal after comparison processing is amplified by the optocoupler (N3), relay (N1), field-effect transistor (Q1), and pulse transformer (T1) in sequence, and then outputs a switching signal to control the automatic activation of the capacitor reactive power compensation device.

2. The voltage detection controller according to claim 1, characterized in that, The lightning protection and anti-interference circuit includes a capacitor (CX2), a varistor (RV1), an overvoltage discharge tube (FD1), a varistor (RV3), and a varistor (RV2). The first terminal of the capacitor (CX2) is connected to the positive terminal of the input power supply, and the second terminal is connected to the negative terminal of the input power supply. The first terminal of the varistor (RV1) is connected to the positive terminal of the power supply, and the second terminal is connected to the first terminal of the overvoltage discharge tube (FD1), with the second terminal of the overvoltage discharge tube (FD1) connected to the protective grounding point (PE). The first terminal of the varistor (RV3) is connected to the first terminal of the overvoltage discharge tube (FD1), and the second terminal is connected to the negative terminal of the power supply. The first terminal of the varistor (RV2) is connected to the positive terminal of the power supply, and the second terminal is connected to the negative terminal of the power supply. The filter circuit includes a common-mode inductor (A2), a safety capacitor (Y1), a safety capacitor (Y2), a common-mode inductor (A3), and a capacitor (CX1). Terminal 1 of the common-mode inductor (A2) is connected to the first terminal of a varistor (RV2), and terminal 2 is connected to the second terminal of the varistor (RV2). Terminal 3 of the common-mode inductor (A2) is connected to the first terminal of the safety capacitor (Y1), and the second terminal of the safety capacitor (Y1) is connected to the protective earth (PE). Terminal 4 of the common-mode inductor (A2) is connected to the first terminal of the safety capacitor (Y2), and the second terminal of the safety capacitor (Y2) is connected to the second terminal of the safety capacitor (Y1) and both are connected to the protective earth (PE). Terminal 1 of the common-mode inductor (A3) is connected to the first terminal of the safety capacitor (Y1), and terminal 2 is connected to the first terminal of the safety capacitor (Y2). Terminal 3 of the common-mode inductor (A3) is connected to the first terminal of the capacitor (CX1), and terminal 4 is connected to the second terminal of the capacitor (CX1). The rectifier and voltage regulator circuit includes a bridge rectifier circuit (KBU10), capacitors (C1), (C2), and (C3), a thermistor (RT1), a power module (A1), a diode (V1), capacitors (C5) and (C4). The first terminal of capacitor (CX1) is connected to the first terminal of the bridge rectifier circuit (KBU10), and the second terminal of capacitor (CX1) is connected to the third terminal of the bridge rectifier circuit (KBU10). The second terminal of the bridge rectifier circuit (KBU10) is connected to the positive terminal of capacitor (C1), and the fourth terminal is connected to the negative terminal of capacitor (C1). The positive terminal of capacitor (C1) is connected to the positive terminal of capacitor (C2), and the negative terminal of capacitor (C1) is connected to the negative terminal of capacitor (C2). The positive terminal of capacitor (C2) is connected to the positive terminal of capacitor (C3), and the negative terminal of capacitor (C2) is connected to the negative terminal of capacitor (C4). C3) Negative terminal; The first terminal of the thermistor (RT1) is connected to the positive terminal of capacitor (C3), and the second terminal is connected to the N terminal of power module (A1). The negative terminal of capacitor (C3) is connected to the N terminal of power module (A1). The +15V output terminal of power module (A1) is connected to the anode of diode (V1). The cathode of diode (V1) is connected to the first terminal of capacitor (C5). The second terminal of capacitor (C5) is connected to the 0V output terminal of power module (A1). The positive terminal of capacitor (C4) is connected to the first terminal of capacitor (C5). The negative terminal of capacitor (C4) is connected to the second terminal of capacitor (C5), and the negative terminal of capacitor (C4) is grounded. The positive terminal of capacitor (C4) is connected to the first terminal of resistor (R1). The second terminal of resistor (R1) is connected to the anode of light-emitting diode (LED1). The cathode of light-emitting diode (LED1) is grounded.

3. A voltage detection controller according to claim 1, characterized in that, The voltage acquisition module specifically includes external voltage terminals (HV+) and (HV-), a voltage transformer, a switching button (S1), a diode rectifier bridge, and an RC filter circuit. The external voltage terminal (HV+) is connected to the first terminal of the primary coil of the voltage transformer, and the external voltage terminal (HV-) is connected to the second terminal of the primary coil of the voltage transformer. The second terminal of the secondary coil of the voltage transformer is connected to the 11th terminal of the amplifier (ADI), the first terminal of the secondary coil of the voltage transformer is connected to the first terminal of the switching button (S1), and the second terminal of the switching button (S1) is connected to the 12th terminal of the amplifier (ADI) and simultaneously grounded, forming a grounding point (GND). The diode rectifier bridge consists of diodes (V10), (V11), (V12), and (V13). The second terminal of the secondary coil of the voltage transformer is connected to the anode of diode (V12), the anode of diode (V12) is connected to the cathode of diode (V13), the anode of diode (V13) is connected to the anode of diode (V11), the cathode of diode (V11) is connected to the anode of diode (V10), the cathode of diode (V10) is connected to the cathode of diode (V12), and the first terminal of the secondary coil of the voltage transformer is connected to the anode of diode (V10). The RC filter circuit includes resistor (R19), capacitor (C16), resistor (R18), and capacitor (C15). The first terminal of resistor (R19) is connected to the cathode of diode (V10), and the second terminal is connected to the anode of diode (V11). The first terminal of capacitor (C16) is connected to the first terminal of resistor (R19), and the second terminal is connected to the second terminal of resistor (R19). The first terminal of resistor (R18) is connected to the first terminal of capacitor (C16), the first terminal of capacitor (C15) is connected to the second terminal of resistor (R18), and the second terminal of capacitor (C15) is grounded.

4. A voltage detection controller according to claim 1, characterized in that, The signal amplification and comparison module specifically includes an amplifier (ADI), potentiometer (RP2), dual operational amplifier (N4), potentiometer (RP1), dual operational amplifier (N2), resistor (R20), capacitor (C17), resistor (R21), resistor (R22), resistor (R16), resistor (R11), resistor (R8), resistor (R15), light-emitting diode (LED3), resistor (R17), Zener diode (V8), diode (V9), and resistor (R12). Connect terminal 9 of the amplifier (ADI) to terminal 1 of resistor (R20), and terminal 2 of resistor (R20) to terminal 8 of the amplifier (ADI); connect terminal 1 of resistor (R20) to terminal 1 of capacitor (C17), terminal 5 of the amplifier (ADI) to terminal 1 of capacitor (C17), and terminal 1 of the amplifier (ADI) to terminal 2 of capacitor (C17) and ground; connect terminal 15 of the amplifier (ADI) to terminal 2 of the amplifier (ADI); connect terminal 2 of the amplifier (ADI) to terminal 1 of resistor (R21), and terminal 2 of resistor (R21) to ground; connect terminal 1 of resistor (R22) to terminal 1 of resistor (R21), and terminal 2 of resistor (R22) to the external voltage terminal (HV+); connect the left end of potentiometer (RP2) to the (+12V) power supply, the right end to ground, and the middle end to terminal 16 of the amplifier (ADI); The first terminal of the dual operational amplifier (N4) is connected to the second terminal and together to the first terminal of the resistor (R16); the third terminal of the dual operational amplifier (N4) is connected to the first terminal of the capacitor (C15), and the fourth terminal is grounded; the fifth terminal of the dual operational amplifier (N4) is connected to the second terminal of the capacitor (C8), and the sixth terminal is connected to the seventh terminal and together to the first terminal of the resistor (R11); the eighth terminal of the dual operational amplifier (N4) is connected to the second terminal of the capacitor (C10), and the eighth terminal of the dual operational amplifier (N4) and the second terminal of the capacitor (C10) are simultaneously connected to a +12V power supply, and the first terminal of the capacitor (C10) is grounded; the first terminal of the capacitor (C8) is connected to the cathode of the diode (V6), and the first terminal of the capacitor (C8) and the cathode of the diode (V6) are simultaneously grounded; the second terminal of the capacitor (C8) is connected to the middle terminal of the potentiometer (RP1), the left end of the potentiometer (RP1) is connected to the anode of the diode (V6), and the right end is connected to a +12V power supply; The first terminal of resistor (R8) is connected to the second terminal of resistor (R11), which in turn is connected to terminals 1 and 6 of the dual operational amplifier (N2). Terminal 2 of the dual operational amplifier (N2) is connected to the second terminal of resistor (R11), terminal 3 is connected to the second terminal of resistor (R16), terminal 4 is grounded, and terminal 5 is grounded. Terminal 7 of the dual operational amplifier (N2) is connected to the first terminal of resistor (R15), the second terminal of resistor (R15) is connected to the anode of LED3, and the cathode of LED3 is grounded. The 8th terminal of the amplifier (N2) is connected to the first terminal of the capacitor (C9), and the 8th terminal of the dual operational amplifier (N2) and the first terminal of the capacitor (C9) are simultaneously connected to the +12V power supply. The second terminal of the capacitor (C9) is grounded. The first terminal of the resistor (R17) is connected to the first terminal of the resistor (R15), and the second terminal is connected to the negative terminal of the Zener diode (V8). The positive terminal of the Zener diode (V8) is connected to the negative terminal of the diode (V9), and the positive terminal of the diode (V9) is grounded. The first terminal of the resistor (R12) is connected to the negative terminal of the diode (V9), and the second terminal is connected to the positive terminal of the diode (V9) and both are grounded.

5. A voltage detection controller according to claim 1, characterized in that, The control output module specifically includes an optocoupler (N3), resistor (R9), resistor (R13), capacitor (C11), capacitor (C12), relay (N1), capacitor (C7), resistor (R6), resistor (R7), field-effect transistor (Q1), pulse transformer (T1), diode (V5), resistor (R4), resistor (R3), light-emitting diode (LED2), diode (V2), diode (V3), diode (V4), resistor (R5), and thyristor (G); Terminal 1 of optocoupler (N3) is connected to terminal 1 of resistor (R12), and terminal 2 is connected to terminal 2 of resistor (R12). Terminal 5 of optocoupler (N3) is connected to terminal 1 of resistor (R9), and terminal 2 of resistor (R9) is connected to a +12V power supply. Terminal 1 of resistor (R13) is connected to terminal 1 of resistor (R9), and terminal 2 of resistor (R13) is connected to terminal 1 of capacitor (C11). Terminal 4 of optocoupler (N3) is connected to terminal 2 of capacitor (C11). Terminal 1 of capacitor (C12) is connected to terminal 5 of relay (N1), and terminal 2 of capacitor (C12) is connected to terminal 1 of relay (N1). Terminal 2 of relay (N1) is connected to terminal 1 of capacitor (C11). Terminal 4 of relay (N1) is connected to terminal 1 of capacitor (C7) and a +12V power supply. The first terminal of resistor (R6) and the second terminal of capacitor (C7) are grounded; the second terminal of resistor (R6) is connected to the 8th terminal of relay (N1) and the first terminal of resistor (R7), and the node is connected to a +12V power supply; the second terminal of resistor (R7) is connected to the 7th and 6th terminals of relay (N1); the first terminal of capacitor (C13) is connected to the 6th terminal of relay (N1), and the second terminal is grounded; the positive terminal of capacitor (C14) is connected to the 6th terminal of relay (N1), and the negative terminal is connected to the second terminal of capacitor (C13), and both are grounded; the positive terminal of diode (V7) is connected to the 3rd terminal of relay (N1), and the negative terminal is connected to the first terminal of resistor (R10); the second terminal of resistor (R10) is connected to the first terminal of resistor (R14), and the second terminal of resistor (R14) is grounded; The gate of the field-effect transistor (Q1) is connected to the first terminal of resistor (R14), the source is grounded, and the drain is connected to the first terminal of pulse transformer (T1). The first terminal of pulse transformer (T1) is connected to the anode of diode (V5), and the cathode of diode (V5) is connected to the first terminal of resistor (R4). The second terminal of resistor (R4) is connected to the first terminal of resistor (R3), and the second terminal of resistor (R3) is connected to the anode of light-emitting diode (LED2), and the cathode of light-emitting diode (LED2) is grounded. The anode of capacitor (C6) is connected to the second terminal of resistor (R4), and the cathode is grounded. The first terminal of resistor (R2) is connected to the second terminal of pulse transformer (T1), and the second terminal is connected to the cathode of diode (V2), with the anode of diode (V2) connected to a +12V power supply. The third terminal of pulse transformer (T1) is connected to the anode of diode (V3), and the cathode of diode (V3) is connected to the cathode of diode (V4). The anode of diode (V4) is connected to the first terminal of resistor (R5), and the second terminal of resistor (R5) is connected to the cathode of diode (V4). Two thyristors (G) are configured. The third terminal of the first thyristor (G) is connected to the second terminal of the resistor (R5), the first terminal is connected to the output point (S1+), and the second terminal is connected to the first terminal of the resistor (R5). The third terminal of the second thyristor (G) is connected to the third terminal of the first thyristor (G), the first terminal is connected to the output point (S1+), and the second terminal is connected to the second terminal of the first thyristor (G) and both are connected to the output point (S1-).

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