CN219107129U - Monitoring system for high-voltage switch cabinet locking protection - Google Patents

Abstract

The embodiment of the utility model provides a monitoring system for locking protection of a high-voltage switch cabinet, and belongs to the technical field of locking protection of high-voltage switch cabinets. The monitoring system comprises a controller; the line live acquisition module is connected with the first end of the controller and is used for acquiring line side live signals; and the bus live acquisition module is connected with the second end of the controller and is used for acquiring bus side live signals. According to the monitoring system for locking protection of the high-voltage switch cabinet, the three voltage transformers are used for converting voltages on three phases of the bus side into low voltages respectively, the current detection sensors are used for detecting currents on the low voltage side of the corresponding voltage transformers and inputting the currents into the bus live acquisition circuit to obtain live signals of the bus side, and the controller is used for controlling the electric control lock module to open or close the cabinet door of the high-voltage switch cabinet on the line side and/or the bus side according to the live signals of the line side and/or the live signals of the bus side, so that operation safety of operators is guaranteed.

Description

Monitoring system for high-voltage switch cabinet locking protection

Technical Field

The utility model relates to the technical field of high-voltage switch cabinet locking protection, in particular to a monitoring system for high-voltage switch cabinet locking protection.

Background

The high-voltage switch cabinet is common high-voltage equipment in a transformer substation and is commonly used in 35kV and 10kV equipment. The switch cabinet is mainly internally provided with primary equipment such as a high-voltage bus, a handcart switch, a rheologic device, a lightning arrester, an outgoing cable connector and the like. The high-voltage equipment is packaged in the switch cabinet, so that the switch cabinet is not visual in switching indication of the switch blade and the ground blade of the open-type equipment, the installation and wiring modes of the equipment in the cabinet are not clear for part of operators, the electrified part of the equipment is not clear, and certain potential safety hazards are brought to electric shock caused by mistaken entering of the electrified interval of the operators.

In the prior art, the high-voltage sensor mainly uses the capacitive voltage division principle to collect live information of a line side or a bus side, and when the line side or the bus side is judged to be live, a line side switch cabinet door or a bus side switch cabinet door is locked, so that an operator is prevented from mistakenly entering the system to cause a safety accident. However, the existing live information on the bus side needs to be directly contacted with the high-voltage bus by the high-voltage sensor, so that the safety operation of the bus can be influenced on one hand, and on the other hand, the existing high-voltage switch cabinet needs to be modified inconveniently, and the difficulty of field popularization and application is high.

The inventor finds that in the process of realizing the utility model, the scheme in the prior art has the defects that the normal operation of the bus can be influenced when the voltage sensor collects the high-voltage bus, and the high-voltage switch cabinet in the collection mode is not easy to refit and popularize.

Disclosure of Invention

The embodiment of the utility model aims to provide a monitoring system for locking protection of a high-voltage switch cabinet, which has the functions of not directly contacting a bus and collecting a bus-side electrified signal and does not need to refit the high-voltage switch cabinet.

In order to achieve the above object, an embodiment of the present utility model provides a monitoring system for locking protection of a high-voltage switch cabinet, which is characterized by comprising:

a controller;

the line live acquisition module is connected with the first end of the controller and is used for acquiring line side live signals;

the electrified collection module of generating line, with the second end of controller is connected for gather the electrified signal of generating line side, the electrified collection module of generating line includes:

three voltage transformers respectively arranged at three phases of the three-phase circuit at the bus side;

three current detection sensors respectively arranged at the low voltage sides of the three voltage sensors,

the current detection device is used for detecting currents of the low voltage sides of the three voltage transformers;

the bus live acquisition circuit is connected with the three current detection sensors;

the Bluetooth communication module is connected with the third end of the controller and is used for being connected with the mobile terminal to transmit the line side live-wire signal, the bus side live-wire signal or the unlocking request signal;

The electric control lock module is connected with the fourth end of the controller and used for controlling the opening or closing of a cabinet door of the high-voltage switch cabinet;

the LED display module is connected with the fifth end of the controller and is used for controlling the LED display module to send out a warning when the controller acquires the bus side electrified signal;

the power module is connected with the line live acquisition module, the bus live acquisition circuit, the Bluetooth communication module, the electric control lock module, the LED display module and the controller and is used for supplying power to the line live acquisition module, the bus live acquisition circuit, the Bluetooth communication module, the electric control lock module, the LED display module and the controller when the station alternating current power supply is normal or abnormal.

Optionally, the line live acquisition module includes:

the input end of the first rectifying diode is connected with the A of the high-voltage sensor of the line-side live display device;

one end of the first resistor is connected with the output end of the first rectifying diode;

the first optical coupler is characterized IN that a first end of the first optical coupler is connected with the other end of the first resistor, a third end of the first optical coupler is connected with an IN_1A pin of the controller, and a fourth end of the first optical coupler is connected with a VCC3V3 port of the power supply module;

One end of the second resistor is connected with the second end of the first optical coupler, and the other end of the second resistor is grounded;

the input end of the first diode is connected with the second end of the first optical coupler, and the output end of the first diode is connected with the first end of the first optical coupler;

and one end of the third resistor is connected with the third end of the first optocoupler, and the other end of the third resistor is grounded.

Optionally, the line live acquisition module further includes:

the input end of the second rectifying diode is connected with the B of the high-voltage sensor of the line-side live display device;

one end of the fourth resistor is connected with the output end of the second rectifying diode;

the first end of the second optocoupler is connected with the other end of the fourth resistor, the third end of the second optocoupler is connected with an IN_1B pin of the controller, and the fourth end of the second optocoupler is connected with a VCC3V3 port of the power supply module;

one end of the fifth resistor is connected with the second end of the second optical coupler, and the other end of the fifth resistor is grounded;

the input end of the second diode is connected with the second end of the second optical coupler, and the output end of the second diode is connected with the first end of the second optical coupler;

and one end of the sixth resistor is connected with the third end of the second optocoupler, and the other end of the sixth resistor is grounded.

Optionally, the line live acquisition module further includes:

the input end of the third rectifier diode is connected with C of the high-voltage sensor of the line-side live display device;

One end of the seventh resistor is connected with the output end of the third rectifying diode;

the first end of the third optocoupler is connected with the other end of the seventh resistor, the third end of the third optocoupler is connected with an IN_1C pin of the controller, and the fourth end of the third optocoupler is connected with a VCC3V3 port of the power supply module;

one end of the eighth resistor is connected with the second end of the third optocoupler, and the other end of the eighth resistor is grounded;

the input end of the third diode is connected with the second end of the third optical coupler, and the output end of the third diode is connected with the first end of the third optical coupler;

and one end of the ninth resistor is connected with the third end of the third optocoupler, and the other end of the ninth resistor is grounded.

Optionally, the bus live acquisition circuit includes:

a tenth resistor, one end of which is connected with the current detection sensor positioned at the A phase side, and the other end of which is grounded;

an eleventh resistor, one end of which is connected with one end of the tenth resistor, and the other end of which is connected with an AD_CA pin of the controller;

one end of the first capacitor is connected with the other end of the eleventh resistor, and the other end of the first capacitor is grounded;

the input end of the fourth diode is grounded, and the output end of the fourth diode is connected with the other end of the eleventh resistor;

and the input end of the fifth diode is connected with the other end of the eleventh resistor, and the output end of the fifth diode is connected with the VCC3V3 port of the power supply module.

Optionally, the bus live acquisition circuit further includes:

a thirteenth resistor, one end of which is connected with the current detection sensor positioned at the B phase side, and the other end of which is grounded;

a fourteenth resistor, one end of which is connected with one end of the thirteenth resistor, and the other end of which is connected with an AD_CB pin of the controller;

one end of the second capacitor is connected with the other end of the fourteenth resistor, and the other end of the second capacitor is grounded;

a sixth diode, the input end of which is grounded, and the output end of which is connected with the other end of the fourteenth resistor;

and the input end of the seventh diode is connected with the other end of the fourteenth resistor, and the output end of the seventh diode is connected with the VCC3V3 port of the power supply module.

Optionally, the bus live acquisition circuit further includes:

a sixteenth resistor, one end of which is connected with the current detection sensor positioned at the C phase side, and the other end of which is grounded;

a seventeenth resistor, one end of which is connected with one end of the sixteenth resistor, and the other end of which is connected with an AD_CC pin of the controller;

one end of the third capacitor is connected with the other end of the seventeenth resistor, and the other end of the third capacitor is grounded;

an eighth diode, the input end of which is grounded, and the output end of which is connected with the other end of the seventeenth resistor;

and the input end of the ninth diode is connected with the other end of the seventeenth resistor, and the output end of the ninth diode is connected with the VCC3V3 port of the power supply module.

Optionally, the electronic control lock module includes:

the first end of the first relay is connected with the VCC5V port of the power supply module, and the second end of the first relay is connected with the controller;

the electric control lock is arranged on the bus bin gate and/or the line bin gate, and the third end and the fourth end of the first relay are connected with the electric control lock.

Optionally, the LED display module includes:

the first end of the second relay is connected with the VCC5V port of the power supply module, the second end of the second relay is connected with the controller, and the third end of the second relay is connected with the 220V port of the power supply module;

and the fourth end of the second relay is connected with the LED display screen.

Optionally, the bluetooth communication module includes:

the first end of the Bluetooth module is connected with the VCC12V port of the power module, the second end of the Bluetooth module is connected with the VCC3V3 port of the power module, the third end of the Bluetooth module is grounded,

a twelfth resistor, one end of which is connected with the fourth end of the Bluetooth module, and the other end of which is connected with a UART 1-TX pin of the controller;

and one end of the fifteenth resistor is connected with the fifth end of the Bluetooth module, and the other end of the fifteenth resistor is connected with a UART1_RX pin of the controller.

Through the technical scheme, the monitoring system for locking protection of the high-voltage switch cabinet provided by the utility model respectively converts the voltages on three phases of the bus side into low voltages through the three voltage transformers, the current detection sensor detects the current of the low voltage side of the corresponding voltage transformer and inputs the current into the bus live acquisition circuit to acquire live signals of the bus side, and the controller controls the electric control lock module to open or close the cabinet door of the high-voltage switch cabinet of the line side and/or the bus side according to the live signals of the line side and/or the live signals of the bus side, so that the operation safety of operators is ensured. The mode that adopts voltage transformer, current detection sensor and the electrified acquisition circuit cooperation of generating line to acquire the electrified information of generating line side has avoided with high-voltage bus direct contact, and then can not influence the safe operation of generating line, also need not repacking high tension switchgear simultaneously, convenient to popularize and use. In addition, bluetooth communication module can improve signal transmission's effectiveness to the operating personnel can know the live signal of circuit side and generating line side through mobile terminal directly perceivedly, and LED display module can show the live condition of generating line side, in order to warn operating personnel, has avoided the emergence of incident.

Additional features and advantages of embodiments of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain, without limitation, the embodiments of the utility model. In the drawings:

FIG. 1 is a block diagram of a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 2 is a block diagram of a controller in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 3 is a circuit diagram of a line-powered acquisition module in a monitoring system for high voltage switchgear lockout protection in accordance with one embodiment of the present utility model;

FIG. 4 is a circuit diagram of a bus live acquisition circuit in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 5 is a circuit diagram of a bus live acquisition circuit in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 6 is a circuit diagram of a bus live acquisition circuit in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 7 is a circuit diagram of an electric lock module in a monitoring system for high voltage switchgear lockout protection in accordance with one embodiment of the present utility model;

FIG. 8 is a circuit diagram of an LED display module in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

FIG. 9 is a circuit diagram of a Bluetooth communication module in a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model;

fig. 10 is a schematic diagram of bus-side live collection in a monitoring system for high voltage switchgear latch-up protection according to an embodiment of the present utility model.

Description of the reference numerals

01. Controller 02 and line live acquisition module

03. Bus live acquisition module 04 and voltage transformer

05. Current detection sensor 06 and bus live acquisition circuit

07. Bluetooth communication module 08 and electric control lock module

09. LED display module 10 and power supply module

Da. First rectifying diode Db, second rectifying diode

Dc. Third rectifier diode R1, first resistor

R2, a second resistor R3 and a third resistor

R4, fourth resistor R5 and fifth resistor

R6, sixth resistor R7, seventh resistor

R8, eighth resistor R9 and ninth resistor

R10, tenth resistor R11, eleventh resistor

R12, twelfth resistor R13, thirteenth resistor

R14, fourteenth resistor R15, fifteenth resistor

R16, sixteenth resistor R17, seventeenth resistor

J. Bluetooth module U1, first optocoupler

U2, second optical coupler U3 and third optical coupler

D1, first diode D2, second diode

D3, third diode D4, fourth diode

D5, fifth diode D6, sixth diode

D7, seventh diode D8, eighth diode

D9, ninth diode C1, first capacitor

C2, a second capacitor C3, a third capacitor

K1, first relay K2, second relay

Detailed Description

The following describes the detailed implementation of the embodiments of the present utility model with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

Fig. 1 is a block diagram of a monitoring system for high voltage switchgear latch-up protection according to one embodiment of the present utility model. In fig. 1, the monitoring system may include a controller 01, a line live acquisition module 02, a bus live acquisition module 03, a bluetooth communication module 07, an electric control lock module 08, an LED display module 09, and a battery management module 10. Specifically, the bus live acquisition module 03 may include three voltage transformers 04, three current detection sensors 05, and a bus live acquisition circuit 06.

The live line acquisition module 02 is connected with the first end of the controller 01 and used for acquiring live line signals on the line side, and the live line acquisition module 03 is connected with the second end of the controller 01 and used for acquiring live line signals on the bus side. The three voltage transformers 04 are respectively arranged at three-phase sides of the three-phase circuit at the bus side, and the three current detection sensors 05 are respectively arranged at the low-voltage sides of the three voltage sensors 04 and are used for detecting currents at the low-voltage sides of the three voltage transformers 04. The bluetooth communication module 07 is connected with a third end of the controller 01, and is used for being connected with a mobile terminal to transmit a line side live signal, a bus side live signal or an unlocking request signal. The electric control lock module 08 is connected with the fourth end of the controller 01 and is used for controlling to open or close the cabinet door of the high-voltage switch cabinet at the line side and/or the bus side. The LED display module 09 is connected to the fifth end of the controller 01, and is configured to control the LED display module 09 to emit an alarm when the controller 01 obtains the bus-side live signal. The power module 10 is connected with the line live acquisition module 02, the bus live acquisition circuit 06, the Bluetooth communication module 07, the electric control lock module 08, the LED display module 09 and the controller 01, and is used for supplying power to the line live acquisition module 02, the bus live acquisition circuit 06, the Bluetooth communication module 07, the electric control lock module 08, the LED display module 09 and the controller 01 when the station alternating current power supply is normal or abnormal.

When the electrification condition of the internal circuit of the high-voltage switch cabinet at the circuit side needs to be monitored, the circuit electrification acquisition module 02 acquires voltage information of the three-phase circuit at the circuit side, converts the acquired voltage information to form a circuit electrification signal and inputs the circuit electrification signal into the controller 01, and the controller 01 recognizes the circuit electrification signal and drives and controls the state of the electric control lock module 08 at the circuit side. If the line side is not electrified, the electric control lock module 08 at the line side is in an openable state, and the cabinet door of the high-voltage switch cabinet at the line side can be opened at any time when an operator needs to open the electric control lock module. If the line side is electrified, the electric control lock module 08 on the line side is in a non-openable state, and when an operator needs to open, the electric control lock module 08 is locked and cannot be opened. When the electrification condition of an internal bus of the high-voltage switch cabinet at the bus side needs to be monitored, the high-voltage sides of the three voltage transformers 04 are respectively connected with three phases on the three-phase circuit at the bus side, and the high voltage on the bus is converted into low voltage by the voltage transformers 04. And three current detection sensors 05 are respectively arranged on the outer rings of the low-voltage sides of the three voltage transformers 04, namely, the current of the low-voltage sides of the voltage transformers 04 can be detected. The low-voltage-side currents of the three voltage transformers 04 are input into a bus live acquisition circuit and converted into bus live signals to be input into the controller 01, and the controller 01 recognizes the bus live signals and drives and controls the state of the bus-side electric control lock module 08. If the bus side is not electrified, the electric control lock module 08 on the bus side is in an openable state, and a cabinet door of the high-voltage switch cabinet on the bus side can be opened at any time when an operator needs to open the electric control lock module. If the bus side is electrified, the electric control lock module 08 on the bus side is in a non-openable state, and when an operator needs to open, the electric control lock module 08 is locked and cannot be opened. The bluetooth communication module 07 can transmit line side live signals and bus side live signals, and an operator can obtain the line side live signals and the bus side live signals, namely, the line side live signals and the bus side live conditions, on the mobile terminal through communication connection between the mobile terminal and the bluetooth communication module 07. In addition, bluetooth communication module 07 can also transmit the request signal that unblanks, and the operating personnel passes through mobile terminal and transmits the request signal that unblanks to bluetooth communication module 07 and controller 01, and controller 01 is according to the cabinet door of circuit side high tension switchgear or the cabinet door of bus side high tension switchgear of circuit side live signal selection opening or closing. The controller 01 drives the LED display module 09 to display or not display the warning sign according to the bus side electrification signal, if the bus side electrification signal is generated, the controller 01 drives the LED display module 09 to display the warning sign, otherwise, the warning sign is not displayed. The power module 10 is connected with 220V alternating current for the station and converts the 220V alternating current into direct current which is available to the line live acquisition module 02, the bus live acquisition circuit 06, the Bluetooth communication module 07, the electric control lock module 08, the LED display module 09 and the controller 01.

In the traditional high-voltage switch cabinet, the high-voltage sensor is used for collecting the line information of the line side or the bus side, so that the opening and closing of the electric control lock of the line side switch cabinet or the bus side switch cabinet are controlled. But the high voltage sensor needs direct contact with the busbar, on the one hand can influence the safe operation of busbar, on the other hand needs the present high tension switchgear of repacking, repacking inconvenience and popularization degree of difficulty are big. In the embodiment of the utility model, the mode of matching the voltage transformer 04 with the current detection sensor 05 is adopted, so that non-contact acquisition of bus-side live information can be realized, the safe operation of a bus is not affected, the high-voltage switch cabinet on the bus side is not required to be refitted, and the popularization and the use are facilitated. In addition, bluetooth communication module 07 can be with line side electrified information and bus side strip line information transmission to mobile terminal, can be convenient for the operation personnel know line side electrified information and bus side strip line information to make corresponding measure. Meanwhile, the Bluetooth communication module 07 can also output unlocking request signals, so that convenience and safety of operators entering the high-voltage switch cabinet are further improved. The LED display module 09 can display the belt line warning at the bus side so as to further warn operators, and avoid safety accidents caused by the false entering of the operators. The power module 10 can provide direct current required by a plurality of modules when 220V alternating current power supply is normal or abnormal, so that the stability and reliability of the monitoring system can be ensured.

In this embodiment of the utility model, as shown in FIG. 2, an STM32F103RCT6 chip may be included for a particular form of controller 01. The chip is a 32-bit embedded-microcontroller integrated circuit, has small volume and powerful functions, and peripheral equipment comprises a crystal oscillator, a temperature sensor and the like, wherein the input voltage is 3.3V.

In this embodiment of the present utility model, as shown in fig. 3, the line live acquisition module may include a line live acquisition circuit and three high voltage sensors connected to three phases on the line side, respectively. Specifically, the line live acquisition circuit may include a first rectifier diode Da, a first resistor R1, a first optocoupler U1, a second resistor R2, a first diode D1, and a third resistor R3.

The input end of the first rectifying diode Da is connected to the a of the high voltage sensor of the line-side live display device, i.e., L1A in fig. 3, and one end of the first resistor R1 is connected to the output end of the first rectifying diode Da. The first end of the first optical coupler U1 is connected with the other end of the first resistor R1, the third end of the first optical coupler U1 is connected with an IN_1A pin of the controller 01, and the fourth end of the first optical coupler U1 is connected with a VCC3V3 port of the power module 10. One end of the second resistor R2 is connected with the second end of the first optical coupler U1, and the other end of the second resistor R2 is grounded. The input end of the first diode D1 is connected with the second end of the first optical coupler U1, and the output end of the first diode D1 is connected with the first end of the first optical coupler U1. One end of the third resistor R3 is connected with the third end of the first optical coupler U1, and the other end of the third resistor R3 is grounded.

The A-phase 100V alternating current output by the high-voltage sensor of the line-side electrified display device is subjected to half-wave rectification through the first rectifying diode Da, then is input along the first end of the first optical coupler U1, and the first optical coupler U1 converts a 100V alternating current signal into a 3.3V pulse signal and inputs the 3.3V pulse signal into the controller 01 through the third port. The controller 01 can judge whether the line side A phase is electrified by detecting whether the IN_1A pin has pulse voltage. If the controller 01 detects that the in_1a pin has pulse voltage, the circuit side a is electrified, otherwise, the circuit side a is not electrified. The circuit is used for judging the electrification condition of the phase A at the line side, is simple and stable, and has high judgment result accuracy.

In this embodiment of the present utility model, the line live display device is mainly constituted by a high-voltage sensor. The high-voltage sensor is an epoxy resin casting pillar insulator product, can be used as a pillar insulator of equipment such as an isolating switch, a grounding switch, a bus, an outgoing line and the like, and has the characteristics of high strength, strong arc resistance, small partial discharge capacity and the like. The high-voltage sensor is embedded with a high-strength dielectric functional material to form a core rod capacitor C, one end of the core rod capacitor C is connected with a high-voltage line through an upper flange, the other end of the core rod capacitor C is connected with a secondary output end of the sensor, the secondary output end of the sensor is connected with a voltage signal acquisition module of the monitoring system and is grounded through a piezoresistor R, and the piezoresistor plays a role in protection. Each grounding end of the high-voltage sensor is reliably grounded by using 1.5mm multi-strand annealed copper wires and insulated wires, and the grounding end of the monitoring system also needs to be reliably grounded. If the high voltage sensor has high voltage and the grounding end is not reliably grounded, the voltage signal input has kilovolt voltage, so that danger is caused; if the grounding end is reliably grounded, the secondary output end only has low voltage of about one hundred volts, the current is very tiny, and personal safety is not endangered. The line high-voltage sensor collects high-voltage line voltage signals in real time, and when any one phase reaches a threshold set by the system, the monitoring system senses that the line is electrified. The threshold parameter is determined by the resistance value of the voltage signal acquisition circuit, and is normally set to be the primary side rated phase voltage x (0.15 to 0.65).

In this embodiment of the present utility model, the resistance value for the resistance of the first resistor R1 includes 51kΩ, the resistance value of the second resistor R2 includes 51kΩ, and the resistance value of the third resistor R3 includes 10kΩ. For the model of the first optocoupler U1, including but not limited to EL357N (B) (TA) -G, the first, second, third, and fourth ends of the first optocoupler U1 correspond to 1, 2, 3, and 4 of the first optocoupler U1 in fig. 3.

In this embodiment of the present utility model, as shown in fig. 3, the line live acquisition circuit may further include a second rectifying diode Db, a fourth resistor R4, a second optocoupler U2, a fifth resistor R5, and second diodes D2 and R6.

The input end of the second rectifying diode Db is connected to the B of the high voltage sensor of the line-side live display device, i.e., L1B in fig. 3, and one end of the fourth resistor R4 is connected to the output end of the second rectifying diode Db. The first end of the second optocoupler U2 is connected with the other end of the fourth resistor R4, the third end of the second optocoupler U2 is connected with an IN_1B pin of the controller 01, and the fourth end of the second optocoupler U2 is connected with a VCC3V3 port of the power module 10. One end of the fifth resistor R5 is connected with the second end of the second optical coupler U2, and the other end of the fifth resistor R5 is grounded. The input end of the second diode D2 is connected with the second end of the second optical coupler U2, and the output end of the second diode D2 is connected with the first end of the second optical coupler U2. One end of the sixth resistor R6 is connected with the third end of the second optical coupler U2, and the other end of the sixth resistor R6 is grounded.

The B-phase 100V alternating current output by the high-voltage sensor of the line-side live display device is subjected to half-wave rectification through the second rectifying diode Db, then is input along the first end of the second optical coupler U2, and the first optical coupler U2 converts the 100V alternating current signal into a 3.3V pulse signal and inputs the 3.3V pulse signal into the controller 01 through the third port. The controller 01 can judge whether the line side B phase is electrified by detecting whether the in_1b pin has pulse voltage. If the controller 01 detects that the in_1b pin has pulse voltage, it indicates that the line side B phase is charged, otherwise, it is not charged. The circuit is used for judging the charging condition of the B phase at the line side, is simple and stable, and has high accuracy of judging results.

In this embodiment of the present utility model, the resistance value for the resistance of the fourth resistor R4 includes 51kΩ, the resistance value of the fifth resistor R5 includes 51kΩ, and the resistance value of the sixth resistor R6 includes 10kΩ. For the model of the second optocoupler U2, including but not limited to EL357N (B) (TA) -G, the first, second, third, and fourth ends of the second optocoupler U2 correspond to 1, 2, 3, and 4 of the second optocoupler U2 in fig. 3.

In this embodiment of the present utility model, as shown in fig. 3, the line live acquisition circuit may further include a third rectifying diode Dc, a seventh resistor R7, a third optocoupler U3, an eighth resistor R8, a third diode D3, and a ninth resistor R9.

The input end of the third rectifying diode Dc is connected to the C of the high voltage sensor of the line-side live display device, i.e., L1C in fig. 3, and one end of the seventh resistor R7 is connected to the output end of the third rectifying diode Dc. The first end of the third optocoupler U3 is connected with the other end of the seventh resistor R7, the third end of the third optocoupler U3 is connected with an IN_1C pin of the controller 01, and the fourth end of the third optocoupler U3 is connected with a VCC3V3 port of the power module 10. One end of the eighth resistor R8 is connected with the second end of the third optocoupler U3, and the other end of the eighth resistor R8 is grounded. The input end of the third diode D3 is connected with the second end of the third optical coupler U3, and the output end of the third diode D3 is connected with the first end of the third optical coupler U3. One end of the ninth resistor R9 is connected with the third end of the third optocoupler U3, and the other end of the ninth resistor R9 is grounded.

The C-phase 100V alternating current output by the high-voltage sensor of the line-side live display device is subjected to half-wave rectification through the third rectifying diode Dc, then is input along the first end of the third optical coupler U3, and the first optical coupler U3 converts the 100V alternating current signal into a 3.3V pulse signal and inputs the 3.3V pulse signal into the controller 01 through the third port. The controller 01 can judge whether the line side C phase is electrified by detecting whether the IN_1C pin has pulse voltage. If the controller 01 detects that the in_1c pin has pulse voltage, it indicates that the line side C phase is charged, otherwise, it is not charged. The circuit is used for judging the charging condition of the C phase at the line side, is simple and stable, and has high accuracy of judging results.

In this embodiment of the present utility model, the resistance value of the resistor for the seventh resistor R7 includes 51kΩ, the resistance value of the R8 for the eighth resistor includes 51kΩ, and the resistance value of the ninth resistor R9 includes 10kΩ. For the model of the third optocoupler U3, including but not limited to EL357N (B) (TA) -G, the first, second, third and fourth ends of the third optocoupler U3 correspond to 1, 2, 3 and 4 of the third optocoupler U3 in fig. 3.

In this embodiment of the present utility model, as shown in fig. 4, the bus bar electrification acquisition circuit may include a tenth resistor R10, an eleventh resistor R11, a first capacitor C1, a fourth diode D4, and a fifth diode D5.

One end of the tenth resistor R10 is connected to the current detection sensor 05 located on the a-phase side, and the other end of the tenth resistor R10 is grounded. One end of the eleventh resistor R11 is connected to one end of the tenth resistor R10, and the other end of the eleventh resistor R11 is connected to the ad_ca pin of the controller 01. One end of the first capacitor C1 is connected to the other end of the eleventh resistor R11, and the other end of the first capacitor C1 is grounded. The input end of the fourth diode D4 is grounded, and the output end of the fourth diode D4 is connected to the other end of the eleventh resistor R11. An input end of the fifth diode D5 is connected to the other end of the eleventh resistor R11, and an output end of the fifth diode D5 is connected to the VCC3V3 port of the power supply module 10.

When the phase a on the bus side is electrified, current flows through the secondary side of the voltage transformer 04, and the current detection sensor 05 outputs a corresponding current signal, and the specific principle can be shown in fig. 10. The current signal flows along one end of the tenth resistor R10, the tenth resistor R10 generates voltage, the eleventh resistor R11 and the first capacitor C1 form an RC filter circuit, the voltage on the tenth resistor R10 is filtered, and finally the filtered voltage is input to the ad_ac pin of the controller 01. In this embodiment of the present utility model, a current detection sensor 05 with a 100mA range is adopted, and when the current on the secondary side of the voltage transformer 04 is 100mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a current signal of 20 mA; when the current of the secondary side of the voltage transformer 04 is 0mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a 4mA current signal, i.e. the current of the secondary side of the voltage transformer 04 is proportional to the output current of the current detection sensor 05. The inside of the controller 01 converts the voltage signal into a digital signal, and the controller 01 determines whether the bus side a phase is charged or not according to the magnitude of the digital signal. The fourth diode D4 and the fifth diode D5 cooperate to protect the subsequent stage circuit from damage.

In this embodiment of the present utility model, the resistance value of the tenth resistor R10 includes 150Ω, the resistance value of the eleventh resistor R11 includes 1kΩ, and the first capacitance C1 includes 0.1 μf. When the resistance of the tenth resistor R10 is 150Ω and the OUT terminal and COM terminal of the current detection sensor 05 will generate a 20mA current signal, a voltage of 3V is generated across the tenth resistor R10. When the resistance of the tenth resistor R10 is 150Ω and the OUT terminal and COM terminal of the current detection sensor 05 will generate a current signal of 4mA, a voltage of 0.6V is generated across the tenth resistor R10. The current detection sensor 05 includes, but is not limited to, JL series sensors.

In this embodiment of the present utility model, as shown in fig. 5, the bus live acquisition circuit may further include a thirteenth resistor R13, a fourteenth resistor R14, a second capacitor C2, a sixth diode D6, and a seventh diode D7.

One end of the thirteenth resistor R13 is connected to the current detection sensor on the B-phase side, and the other end is grounded. One end of the fourteenth resistor R14 is connected to one end of the thirteenth resistor R13, and the other end of the fourteenth resistor R14 is connected to the ad_cb pin of the controller 01. One end of the second capacitor C2 is connected to the other end of the fourteenth resistor R14, and the other end of the second capacitor C2 is grounded. The input end of the sixth diode D6 is grounded, and the output end of the sixth diode D6 is connected to the other end of the fourteenth resistor R14. An input end of the seventh diode D7 is connected to the other end of the fourteenth resistor, and an output end of the seventh diode D7 is connected to the VCC3V3 port of the power supply module 10.

When the B phase on the bus side is charged, a current flows through the secondary side of the voltage transformer 04, and the current detection sensor 05 outputs a corresponding current signal. The current signal flows along one end of the thirteenth resistor R13, the thirteenth resistor R13 generates voltage, the fourteenth resistor R14 and the second capacitor C2 form an RC filter circuit, the voltage on the thirteenth resistor R13 is filtered, and finally the filtered voltage is input to the ad_cb pin of the controller 01. In this embodiment of the present utility model, a current detection sensor 05 with a 100mA range is adopted, and when the current on the secondary side of the voltage transformer 04 is 100mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a current signal of 20 mA; when the current of the secondary side of the voltage transformer 04 is 0mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a 4mA current signal, i.e. the current of the secondary side of the voltage transformer 04 is proportional to the output current of the current detection sensor 05. The inside of the controller 01 converts the voltage signal into a digital signal, and the controller 01 determines whether the bus side B phase is charged or not according to the magnitude of the digital signal. The sixth diode D6 and the seventh diode D7 cooperate to protect the subsequent stage circuit from damage.

In this embodiment of the utility model, the resistance of the thirteenth resistor R13 comprises 150Ω, the resistance of the fourteenth resistor R14 comprises 1kΩ, and the second capacitance C2 comprises 0.1 μf. When the resistance of the thirteenth resistor R13 is 150Ω and the OUT terminal and COM terminal of the current detection sensor 05 will generate a 20mA current signal, a voltage of 3V is generated across the thirteenth resistor R13. When the resistance of the thirteenth resistor R13 is 150Ω and the OUT terminal and COM terminal of the current detection sensor 05 will generate a current signal of 4mA, a voltage of 0.6V is generated across the thirteenth resistor R13.

In this embodiment of the present utility model, as shown in fig. 6, the bus live acquisition circuit may further include a sixteenth resistor R16, a seventeenth resistor R17, a third capacitor C3, an eighth diode D8, and a ninth diode D9.

One end of the sixteenth resistor R16 is connected to the current detection sensor located on the C-phase side, and the other end of the sixteenth resistor R16 is grounded. One end of the seventeenth resistor R17 is connected to one end of the sixteenth resistor R16, and the other end of the seventeenth resistor R17 is connected to the ad_cc pin of the controller 01. One end of the third capacitor C3 is connected to one end of the seventeenth resistor R17, and the other end of the third capacitor C3 is grounded. The input end of the eighth diode D8 is grounded, and the output end of the eighth diode D8 is connected to the other end of the seventeenth resistor R17. An input terminal of the ninth diode D9 is connected to the other terminal of the seventeenth resistor R17, and an output terminal of the ninth diode D9 is connected to the VCC3V3 port of the power supply module 10.

When the C phase on the bus side is charged, a current flows through the secondary side of the voltage transformer 04, and the current detection sensor 05 outputs a corresponding current signal. The current signal flows along one end of the sixteenth resistor R16, the sixteenth resistor R16 generates voltage, the seventeenth resistor R17 and the third capacitor C3 form an RC filter circuit, the voltage on the sixteenth resistor R16 is filtered, and finally the filtered voltage is input to the ad_cc pin of the controller 01. In this embodiment of the present utility model, a current detection sensor 05 with a 100mA range is adopted, and when the current on the secondary side of the voltage transformer 04 is 100mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a current signal of 20 mA; when the current of the secondary side of the voltage transformer 04 is 0mA, the OUT terminal and the COM terminal of the current detection sensor 05 will generate a 4mA current signal, i.e. the current of the secondary side of the voltage transformer 04 is proportional to the output current of the current detection sensor 05. The inside of the controller 01 converts the voltage signal into a digital signal, and the controller 01 determines whether the bus side C phase is charged or not according to the magnitude of the digital signal. The eighth diode D8 and the ninth diode D9 cooperate to protect the subsequent stage circuit from damage.

In this embodiment of the utility model, the resistance of the sixteenth resistor R16 comprises 150Ω, the resistance of the seventeenth resistor R17 comprises 1kΩ, and the third capacitance C3 comprises 0.1 μf. When the resistance of the sixteenth resistor R16 is 150Ω and the OUT terminal and COM terminal of the current detecting sensor 05 will generate a 20mA current signal, a voltage of 3V is generated across the sixteenth resistor R16. When the resistance of the sixteenth resistor R16 is 150Ω and the OUT terminal and COM terminal of the current detecting sensor 05 will generate a current signal of 4mA, a voltage of 0.6V is generated across the sixteenth resistor R16.

In this embodiment of the utility model, as shown in fig. 7, the electric control lock module 08 may include a first relay K1 and an electric control lock.

A first end of the first relay K1 is connected to the VCC5V port of the power supply module 10, and a second end of the first relay K1 is connected to the controller 01. The electric control lock is arranged on the bus bin gate and/or the line bin gate, and the third end A_COM and the fourth end A_NC1 of the fourth relay K1 are connected with the electric control lock. Specifically, the second terminal of the first relay K1 is connected to the RLY6 pin of ULN2003, ULN2003 is connected to the OUT6 pin of the controller 01, and ULN2003 is used to drive the second relay K2.

When the controller 01 detects that the line side or the bus side is electrified, whether the controller 01 detects an unlocking request signal or not at this time, the controller 01 controls the electric control lock to be in a locking state through the first relay K1, and an operator cannot open the cabinet door at this time. When the controller 01 detects that the line side or the bus side is not electrified, an operator sends out an unlocking request of the bus bin gate or the line bin gate, and the controller 01 controls the electric control lock to be opened through the first relay K1, namely, the controller 01 controls the logic of the electric control lock to be the logic relation of the AND gate. When the controller 01 receives a bus side electroless and a bus side unlocking request, an electric control lock on the bus side is opened; when the controller 01 receives a line side electroless and line side unlocking request, the electric control lock on the line side is opened.

In this embodiment of the utility model, the electrically controlled lock includes, but is not limited to, a 12V electrically controlled lock of the LY series, when the electrically controlled lock is energized, the locking bolt retracts, at which point the door can be opened; otherwise, the lock tongue pops up to lock the cabinet door. The model of the first relay K1 may include HF32F-005-ZS.

In this embodiment of the present utility model, as shown in fig. 8, the LED display module may include a second relay K2 and an LED display screen.

The first end of the second relay K2 is connected with the VCC5V port of the power module 10, the second end of the second relay K2 is connected with the controller 01, and the third end of the second relay K2 is connected with the 220V port of the power module 10. Specifically, the second terminal of the second relay K2 is connected to the RLY5 pin of ULN2003, and ULN2003 is connected to the OUT5 pin of the controller 01, and ULN2003 is used to drive the second relay K2.

After the controller 01 monitors that the bus side is electrified, the controller 01 controls the driving module inside the LED display screen to start through the second relay K2, so that bus electrification warning information is displayed on the LED display screen. In addition, the LED display screen has a WIFI function, and display contents can be set through mobile terminals such as mobile phones, including but not limited to 'bus electrification, high-voltage danger and the like'; otherwise, the LED display screen does not display.

In this embodiment of the present utility model, as shown in fig. 9, the bluetooth communication module 07 may include a bluetooth module J, a twelfth resistor R12, and a fifteenth resistor R15. The Bluetooth module J includes, but is not limited to, HC-08 model. Specifically, a first end of the bluetooth module J is connected to the VCC12V port of the power module 10, a second end of the bluetooth module J is connected to the VCC3V3 port of the power module 10, and a third end of the bluetooth module J is grounded. One end of the twelfth resistor R12 is connected with the fourth end of the Bluetooth module J, and the other end of the twelfth resistor R12 is connected with the UART 1-TX pin of the controller 01. One end of the fifteenth resistor R15 is connected with the fifth end of the Bluetooth module J, and the other end of the fifteenth resistor R15 is connected with a UART1_RX pin of the controller 01.

In this embodiment of the utility model, the model of the second relay K2 may comprise HF32F-005-ZS.

Mobile terminals such as mobile phones are connected with the controller 01 through a Bluetooth communication mode, after the mobile terminals such as mobile phones are successfully connected with the monitoring system, the charged information of the line side and the bus side switch cabinet can be checked through the APP, and under the premise of ensuring safety, the mobile phones can send unlocking requests to the controller 01 through the Bluetooth module so as to open the cabinet door. Mobile terminals such as mobile phones check monitoring information inside the high-voltage switch cabinets by scanning two-dimension codes reserved on monitoring systems on the high-voltage switch cabinets.

In this embodiment of the present utility model, the resistance value of the twelfth resistor R12 includes 470 Ω, and the resistance value of the fifteenth resistor R15 includes 470 Ω.

In this embodiment of the present utility model, the power module 10 may include a main power module and a standby power module. Specifically, the main power supply module comprises a power supply conversion module, the input of the power supply conversion module is connected with 220V alternating current for a station, 220V is converted into 12V direct current power supply through the power supply conversion module, and the 12V direct current power supply is converted into 5V direct current power supply and 3.3V direct current power supply through other power supply conversion modules or in a split manner, so that the power supply of the line live acquisition module 02, the bus live acquisition circuit 06, the Bluetooth communication module 07, the electric control lock module 08, the LED display module 09 and the controller 01 can be met. When 220V alternating current is disabled for station, the monitoring system is manually connected into a standby power supply which is a 12V direct current power supply, the standby power supply converts the 12V direct current power supply into a 5V direct current power supply and a 3.3V direct current power supply through a power supply conversion module or a shunt, and the power supply of the circuit live acquisition module 02, the bus live acquisition circuit 06, the Bluetooth communication module 07, the electric control lock module 08, the LED display module 09 and the controller 01 can be met. The power supply mode improves the reliability of the power supply of the monitoring system.

Through the technical scheme, the monitoring system for locking protection of the high-voltage switch cabinet provided by the utility model respectively converts the voltages on three phases of the bus side into low voltages through the three voltage transformers 04, the current detection sensor 05 detects the current of the low voltage side of the corresponding voltage transformer 04 and inputs the current into the bus live acquisition circuit 06 to acquire live signals of the bus side, and the controller 01 controls the electric control lock module 08 to open or close the cabinet door of the high-voltage switch cabinet of the line side and/or the bus side according to the live signals of the line side and/or the bus side, so that the operation safety of operators is ensured. The mode that voltage transformer 04, current detection sensor 05 and electrified acquisition circuit 06 of generating line cooperate to acquire the electrified information of generating line side has avoided with high-voltage bus direct contact, and then can not influence the safe operation of generating line, also need not repacking high-voltage switch cabinet simultaneously, convenient to popularize and use. In addition, bluetooth communication module 07 can improve the validity that improves signal transmission to the operating personnel can know the live signal of circuit side and generating line side through mobile terminal directly perceivedly, and LED display module 09 can show the live condition of generating line side, in order to warn operating personnel, has avoided the emergence of incident.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (10)

1. A monitoring system for high tension switchgear lockout protection, comprising:

a controller;

the line live acquisition module is connected with the first end of the controller and is used for acquiring line side live signals;

The electrified collection module of generating line, with the second end of controller is connected for gather the electrified signal of generating line side, the electrified collection module of generating line includes:

three voltage transformers respectively arranged at three phases of the three-phase circuit at the bus side;

the three current detection sensors are respectively arranged at the low-voltage sides of the three voltage sensors and are used for detecting the currents at the low-voltage sides of the three voltage transformers;

the bus live acquisition circuit is connected with the three current detection sensors;

the Bluetooth communication module is connected with the third end of the controller and is used for being connected with the mobile terminal to transmit the line side live-wire signal, the bus side live-wire signal or the unlocking request signal;

the electric control lock module is connected with the fourth end of the controller and used for controlling the opening or closing of a cabinet door of the high-voltage switch cabinet at the line side and/or the bus side;

the LED display module is connected with the fifth end of the controller and is used for controlling the LED display module to send out a warning when the controller acquires the bus side electrified signal;

the power module is connected with the line live acquisition module, the bus live acquisition circuit, the Bluetooth communication module, the electric control lock module, the LED display module and the controller and is used for supplying power to the line live acquisition module, the bus live acquisition circuit, the Bluetooth communication module, the electric control lock module, the LED display module and the controller when the station alternating current power supply is normal or abnormal.

2. The monitoring system of claim 1, wherein the line live acquisition module comprises:

the input end of the first rectifying diode is connected with the A of the high-voltage sensor of the line-side live display device;

one end of the first resistor is connected with the output end of the first rectifying diode;

the first optical coupler is characterized IN that a first end of the first optical coupler is connected with the other end of the first resistor, a third end of the first optical coupler is connected with an IN_1A pin of the controller, and a fourth end of the first optical coupler is connected with a VCC3V3 port of the power supply module;

one end of the second resistor is connected with the second end of the first optical coupler, and the other end of the second resistor is grounded;

the input end of the first diode is connected with the second end of the first optical coupler, and the output end of the first diode is connected with the first end of the first optical coupler;

and one end of the third resistor is connected with the third end of the first optocoupler, and the other end of the third resistor is grounded.

3. The monitoring system of claim 2, wherein the line live acquisition module further comprises:

the input end of the second rectifying diode is connected with the B of the high-voltage sensor of the line-side live display device;

one end of the fourth resistor is connected with the output end of the second rectifying diode;

the first end of the second optocoupler is connected with the other end of the fourth resistor, the third end of the second optocoupler is connected with an IN_1B pin of the controller, and the fourth end of the second optocoupler is connected with a VCC3V3 port of the power supply module;

One end of the fifth resistor is connected with the second end of the second optical coupler, and the other end of the fifth resistor is grounded;

the input end of the second diode is connected with the second end of the second optical coupler, and the output end of the second diode is connected with the first end of the second optical coupler;

and one end of the sixth resistor is connected with the third end of the second optocoupler, and the other end of the sixth resistor is grounded.

4. A monitoring system in accordance with claim 3, wherein the line live acquisition module further comprises:

the input end of the third rectifier diode is connected with C of the high-voltage sensor of the line-side live display device;

one end of the seventh resistor is connected with the output end of the third rectifying diode;

the first end of the third optocoupler is connected with the other end of the seventh resistor, the third end of the third optocoupler is connected with an IN_1C pin of the controller, and the fourth end of the third optocoupler is connected with a VCC3V3 port of the power supply module;

one end of the eighth resistor is connected with the second end of the third optocoupler, and the other end of the eighth resistor is grounded;

the input end of the third diode is connected with the second end of the third optical coupler, and the output end of the third diode is connected with the first end of the third optical coupler;

and one end of the ninth resistor is connected with the third end of the third optocoupler, and the other end of the ninth resistor is grounded.

5. The monitoring system of claim 1, wherein the bus live acquisition circuit comprises:

A tenth resistor, one end of which is connected with the current detection sensor positioned at the A phase side, and the other end of which is grounded;

an eleventh resistor, one end of which is connected with one end of the tenth resistor, and the other end of which is connected with an AD_CA pin of the controller;

one end of the first capacitor is connected with the other end of the eleventh resistor, and the other end of the first capacitor is grounded;

the input end of the fourth diode is grounded, and the output end of the fourth diode is connected with the other end of the eleventh resistor;

and the input end of the fifth diode is connected with the other end of the eleventh resistor, and the output end of the fifth diode is connected with the VCC3V3 port of the power supply module.

6. The monitoring system of claim 5, wherein the bus live acquisition circuit further comprises:

a thirteenth resistor, one end of which is connected with the current detection sensor positioned at the B phase side, and the other end of which is grounded;

a fourteenth resistor, one end of which is connected with one end of the thirteenth resistor, and the other end of which is connected with an AD_CB pin of the controller;

one end of the second capacitor is connected with the other end of the fourteenth resistor, and the other end of the second capacitor is grounded;

a sixth diode, the input end of which is grounded, and the output end of which is connected with the other end of the fourteenth resistor;

and the input end of the seventh diode is connected with the other end of the fourteenth resistor, and the output end of the seventh diode is connected with the VCC3V3 port of the power supply module.

7. The monitoring system of claim 6, wherein the bus live acquisition circuit further comprises:

a sixteenth resistor, one end of which is connected with the current detection sensor positioned at the C phase side, and the other end of which is grounded;

a seventeenth resistor, one end of which is connected with one end of the sixteenth resistor, and the other end of which is connected with an AD_CC pin of the controller;

one end of the third capacitor is connected with the other end of the seventeenth resistor, and the other end of the third capacitor is grounded;

an eighth diode, the input end of which is grounded, and the output end of which is connected with the other end of the seventeenth resistor;

and the input end of the ninth diode is connected with the other end of the seventeenth resistor, and the output end of the ninth diode is connected with the VCC3V3 port of the power supply module.

8. The monitoring system of claim 1, wherein the electrically controlled lock module comprises:

the first end of the first relay is connected with the VCC5V port of the power supply module, and the second end of the first relay is connected with the controller;

the electric control lock is arranged on the bus bin gate and/or the line bin gate, and the third end and the fourth end of the first relay are connected with the electric control lock.

9. The monitoring system of claim 1, wherein the LED display module comprises:

The first end of the second relay is connected with the VCC5V port of the power supply module, the second end of the second relay is connected with the controller, and the third end of the second relay is connected with the 220V port of the power supply module;

and the fourth end of the second relay is connected with the LED display screen.

10. The monitoring system of claim 1, wherein the bluetooth communication module comprises:

the first end of the Bluetooth module is connected with the VCC12V port of the power module, the second end of the Bluetooth module is connected with the VCC3V3 port of the power module, the third end of the Bluetooth module is grounded,

a twelfth resistor, one end of which is connected with the fourth end of the Bluetooth module, and the other end of which is connected with a UART 1-TX pin of the controller;

and one end of the fifteenth resistor is connected with the fifth end of the Bluetooth module, and the other end of the fifteenth resistor is connected with a UART1_RX pin of the controller.

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