Substation monitoring device

Abstract

A substation monitoring device includes a battery and a text message circuit module, as well as a pressure plate detection device, a battery performance detection circuit, a trigger circuit, and a pressure plate temperature detection circuit. The pressure plate detection devices are multiple, and the pressure plate temperature detection circuits are multiple. Each pressure plate detection device includes a micro switch, a support tube, and an internally threaded tube installed together, with a support plate at the lower end of the support tube. The support plates of the multiple pressure plate detection devices are respectively installed on the rear side of the movable plates of the multiple pressure plates of the substation. The thermistors of the multi-channel pressure plate temperature detection circuit are installed on the pressure plates. The battery and text message circuit module, the battery performance detection circuit, the trigger circuit, and the pressure plate temperature detection circuit are installed in a component box and electrically connected to the micro switch and the substation battery. In this new device, if the static and dynamic contacts of the electrical equipment controlled by any pressure plate are poorly closed or the load is too large, or if the performance of any battery deteriorates, the text message module will automatically send a text message.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substation supporting equipment, in particular to a transformer substation monitoring device. Background Art

[0002] Substations primarily step down or boost the voltage of electricity generated by power plants and deliver it to end-users. To ensure the proper functioning of power control equipment within the substation after a power outage, battery packs are installed in the distribution boxes within the equipment room (to power these equipment after a power outage). Because battery packs have a limited lifespan, their performance needs to be tested at regular intervals. Manual, unintended testing not only inconveniences the testers but also affects their commitment to responsibility. If testers fail to thoroughly check battery performance, a single battery failure could impact the overall functioning of the battery pack. For example, damage to one or more batteries could cause the control equipment to malfunction during a substation outage, hindering power restoration. Another problem is that during actual testing, staff generally only test the overall voltage of the battery pack. In this way, when one or more batteries have poor performance, it is not obvious in the overall battery pack voltage display. Therefore, the battery with poor performance cannot be maintained or replaced in the first place. When a single battery fails during use, it will affect the entire battery pack and also affect the restoration of power supply to the substation.

[0003] To ensure safe power supply, substations have a large number of pressure plates. Depending on the type of pressure plate used, they play a role in opening and closing the power supply, transmitting signals, and ensuring safe power supply. To ensure the normal operation of the pressure plates, staff are required to periodically check the position of the pressure plates in key areas, that is, whether the moving contacts and static contacts of the electrical equipment controlled by the pressure plates are in an open or closed state. Due to the large number of pressure plates, actively and aimlessly detecting the working status of multiple pressure plates will cause inconvenience to management personnel. Moreover, due to the different sense of responsibility of staff, it is not possible to effectively ensure that each pressure plate is in a suitable working state. Therefore, there are certain hidden dangers to the safe operation of the substation. Finally, when the electrical equipment controlled by the pressure plate is overloaded or short-circuited, overheating will generally occur at the contacts. This cannot be detected by existing technologies. Therefore, after a long period of high temperature (indicating that the load has been too large or short-circuited), the staff cannot deal with it in time, which may cause damage to the electrical equipment. Summary of the Invention

[0004] In order to overcome the disadvantages of existing substations that cannot effectively ensure that the battery packs and pressure plates are in good working condition due to structural limitations, and that the safe operation of the substation has hidden dangers, the present invention provides a substation with several pressure plate detection devices and multi-channel pressure plate temperature detection circuits, which are respectively installed at the moving contact control panel positions of several pressure plates. When the static contacts and moving contacts of the electrical equipment controlled by any pressure plate in the application are poorly closed, and the pressure plate temperature is too high, the SMS circuit will push a text message to the management personnel in real time. It also has a battery detection circuit. When any battery in the application fails and the voltage is too low, the SMS circuit will also send a text message to the management personnel, so that the management personnel can check the status of multiple pressure plates separately in time, effectively reset the pressure plate with poor contact, inspect and maintain the electrical equipment that causes the pressure plate temperature to be too high, and replace damaged or poorly performing single or multiple batteries in time, thereby effectively ensuring the safe operation of the substation.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A substation monitoring device, including a battery and a short message circuit module, is characterized in that it also has a pressure plate detection device, a battery performance detection circuit, a trigger circuit, and a pressure plate temperature detection circuit; the pressure plate detection device has multiple identical ones, each pressure plate detection device includes a micro switch, a support tube, and an internal threaded tube, the internal threaded tube is installed at the upper end of the support tube, a screw is arranged in the upper end of the internal threaded tube, a contact plate is arranged at the upper end of the screw, the micro switch is installed at the upper end of the contact plate, and a support plate is arranged at the lower end of the support tube; the support plates of the multiple pressure plate detection devices are respectively installed on the rear side of the movable plates of multiple pressure plates in the substation; the pressure plate temperature detection circuit has multiple identical ones, each pressure plate temperature detection circuit includes a control subcircuit and a thermistor, and the thermistors of the multiple pressure plate temperature detection circuits are respectively installed on multiple pressure plates; the battery and short message circuit module, the battery performance detection circuit, the trigger circuit, and the thermistors of the multiple pressure plate temperature detection circuits are respectively installed on multiple pressure plates; The control subcircuit of the circuit and the pressure plate temperature detection circuit is installed in the component box; the battery performance detection circuit has the same multi-channel, and the signal input ends of each battery performance detection circuit are respectively electrically connected to the positive and negative poles of each battery in the battery pack of the substation; the two poles of the battery are respectively electrically connected to the SMS circuit module and the power input ends of the multi-channel pressure plate temperature detection circuit; one end of the microswitch of the multi-channel pressure plate detection equipment is electrically connected to the positive pole of the battery, and the other end of the microswitch of the multi-channel pressure plate detection equipment is electrically connected to the signal input end of the trigger circuit, the negative pole of the battery is electrically connected to the negative power input end of the trigger circuit and the trigger signal input end of the multi-channel battery performance detection circuit, and the signal output end of the trigger circuit, the multi-channel battery performance detection circuit, and the signal output of the multi-channel pressure plate temperature detection circuit are respectively electrically connected to the three signal input ends of the SMS module.

[0007] Furthermore, after the moving contact and the contact end of the electrical equipment controlled by each pressure plate are closed, the internal contacts of the micro switch are open, and the micro switch is a normally closed contact type micro switch.

[0008] Furthermore, the battery can also adopt a DC switching power supply module.

[0009] Furthermore, each battery performance detection circuit includes an adjustable resistor, an NPN transistor, a resistor, and a relay, which are electrically connected to each other. One end of the adjustable resistor is connected to the base of the first NPN transistor, the collector of the first NPN transistor is connected to the base of the second NPN transistor and one end of the resistor R, the other end of the adjustable resistor is connected to the other end of the resistor and the positive power input end of the relay, the emitters of the two NPN transistors are connected, and the collector of the second NPN transistor is connected to the negative power input end of the relay.

[0010] Furthermore, the trigger circuit includes a resistor and an NPN transistor, which are electrically connected thereto, and one end of the resistor is connected to the base of the NPN transistor.

[0011] Furthermore, the SMS circuit module is a SMS alarm module.

[0012] Furthermore, the control subcircuit of each pressure plate temperature detection circuit includes a resistor and an NPN transistor, which are electrically connected to the thermistor, one end of the thermistor is connected to one end of the resistor, and the other end of the resistor is connected to the base of the NPN transistor.

[0013] The present invention has the following beneficial effects: The present invention comprises several pressure plate detection devices, each mounted on the movable contact control panel (movable panel) of each pressure plate. When all pressure plates are operating normally, the trigger circuit will not output a trigger signal to the signal input terminal of the SMS module, and the SMS module will not send a text message. In actual situations, if the static and moving contacts of the electrical equipment controlled by any pressure plate fail to close properly, the trigger circuit will output a signal to the first signal input terminal of the SMS module, and the SMS module will automatically send a text message to the remote administrator's mobile phone indicating that the pressure plate has failed to close properly. In several pressure plate temperature detection circuits, if the temperature of the electrical equipment controlled by any pressure plate exceeds the upper limit, a trigger signal will be input to the third signal input terminal of the SMS module, and the SMS module will then send a text message to the remote administrator's mobile phone indicating that the pressure plate is overheating. In several battery performance detection circuits, if the performance of any battery deteriorates, a trigger signal will be input to the second signal input terminal of the SMS module, and the SMS module will automatically send a text message to the remote administrator's mobile phone indicating that the battery has failed to perform properly. In this way, after receiving different text messages, the management personnel can promptly check the status of multiple pressure plates, effectively reset the pressure plates with poor contact, check the electrical equipment controlled by the corresponding pressure plates to see if they are causing the pressure plates to heat up, and perform maintenance, or promptly replace one or more batteries that are damaged or have poor performance, thereby effectively ensuring the safe operation of the substation. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of one set of the pressing plate detection equipment of the present invention after being installed on the pressing plate;

[0016] Figure 2 This is a structural diagram of one set of platen detection equipment of the present invention;

[0017] Figure 3 It is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0018] Figure 1 、 Figure 2As shown in, a substation monitoring device includes a battery 1 and a text message circuit module 2, a charging socket 3, a power switch 4, and also has a pressure plate detection device 5, a battery performance detection circuit 6, a trigger circuit 7, and a pressure plate temperature detection circuit; the pressure plate detection device 5 has the same multiple, each pressure plate detection device includes a micro switch 51, a support tube 52, and an internal threaded tube 53. The lower end of the internal threaded tube 53 is welded to the middle of the upper end of the support tube 52. The inner upper end of the internal threaded tube 53 has an internal thread. A screw 54 is screwed into the internal threaded tube 53. A circular contact plate 55 is welded to the upper end of the screw 54. The lower end of the shell of the micro switch 51 is glued to the middle of the upper end of the contact plate 55, and the lower end of the support tube 52 is welded A circular support plate 56 is connected; the rear sides of the support plates 56 of the multiple pressure plate detection devices are respectively installed on the middle of the upper end of the rear side of the movable plate of the multiple pressure plates 8 of the substation by double-sided tape or glue bonding; the pressure plate temperature detection circuit has the same multiple channels, each pressure plate temperature detection circuit includes a control subcircuit 10 and a thermistor 101, and the thermistors 101 of the multiple pressure plate temperature detection circuits are respectively installed on the front sides of the multiple pressure plates 8; the battery 1 and SMS circuit module 2, charging socket 3, power switch 4, battery performance detection circuit 6, trigger circuit 7, and control subcircuit 10 of the multiple pressure plate temperature detection circuit are installed on the circuit board in the component box 9, and the component box 9 is installed in the electrical control box of the substation.

[0019] Figure 3As shown in , in this embodiment, the installation and operating relationships between the microswitches SK and the trigger circuits of several pressure plate detection devices 5 are securely consistent. The installation and operating relationships between the multiple battery performance detection circuits and the SMS circuit module A1 are completely consistent, as are the installation and operating relationships between the multiple pressure plate temperature detection circuits and the SMS circuit module A1. The following description will be based on the installation and operating relationships between the microswitches SK and the trigger circuit of one pressure plate detection device 5, the installation and operating relationships between one battery performance detection circuit and the SMS circuit module A1, and the installation and operating relationships between one pressure plate temperature detection circuit and the SMS circuit module A1 as representative examples. After the moving contact and contact end of the electrical device controlled by each pressure plate 8 are closed, the button of the microswitch SK just contacts the front side of the fixed plate of the pressure plate 8, and the internal contacts of the microswitch SK are open. The microswitch SK is a normally closed contact type microswitch. Battery G is a 12V / 40Ah lithium battery with a lifespan of approximately three months on a single charge. A 220V to 12V DC switching power supply module can also be used instead. Charging socket CZ is a coaxial power socket, and power switch S is a toggle power switch (the charging socket CZ and the power switch S handle are located outside component box 9). The battery performance detection circuit includes an adjustable resistor RP1, NPN transistors Q5 and Q6, a resistor R1, and a relay K. These are connected via circuit board wiring. One end of adjustable resistor RP1 is connected to the base of the first NPN transistor Q5. The collector of the first NPN transistor Q5 is connected to the base of the second NPN transistor Q6, and to one end of resistor R1. The other end of adjustable resistor RP1 is connected to the other end of resistor R1 and the positive power input of relay K. The emitters of the two NPN transistors Q5 and Q6 are connected, and the collector of the second NPN transistor Q6 is connected to the negative power input of relay K. SMS circuit module A1 is a finished SMS alarm module model GSM DTUSIM800C. SMS alarm module A1 has two power input terminals, pins 1 and 2, and eight signal input ports, pins 3-10. When a low-level signal is input to each signal input port, SMS alarm module A1 sends a text message via the wireless mobile network. SMS alarm module A1 can store text messages with different contents. (In this embodiment, the administrator pre-programs two text messages using SMS alarm module A1's own functions, including "pressure plate failure," "battery failure," and "pressure plate overheating.") When two signal input terminals, pins 3 and 4, are triggered, SMS alarm module A1 automatically sends two text messages with different contents, allowing for simultaneous text messaging for up to three phone numbers. The trigger circuit includes a resistor R and an NPN transistor Q1, connected via circuit board wiring. One end of resistor R is connected to the base of NPN transistor Q1.The control subcircuit of each platen temperature detection circuit includes a resistor R2 and an NPN transistor Q2, which are electrically connected to a thermistor T. One end of the thermistor T is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the base of the NPN transistor Q2.

[0020] Figure 3 As shown, the battery performance detection circuit has the same multiple paths. The other end of the adjustable resistor RP1 at both ends of the signal input of each battery performance detection circuit and the emitter of the NPN transistor Q5 are respectively connected to the positive and negative poles of each single battery G1 (or GN1, GN2) of the battery pack of the substation via wires; the two poles of the battery G and the two connection terminals of the charging socket CZ are respectively connected via wires (when the battery G is out of power, the external 12V power charger plug can be inserted into the charging socket CZ to charge the battery G), the positive pole of the battery G and one end of the power switch S are connected via wires, the negative pole of the battery G and the other end of the power switch S are connected to the 1st and 2nd pins (VCC and GND) of the power input of the SMS circuit module A1, the other end of the thermistor T at both ends of the power input of the multi-path pressure plate temperature detection circuit and the emitter of the NPN transistor Q2 The poles are respectively connected via wires; one end of the microswitch SK of the multi-way pressure plate detection device and the other end of the power switch S are connected via wires, the other end of the microswitch SK of the multi-way pressure plate detection device and the other end of the signal input resistor R of the trigger circuit are connected via wires, the negative pole of the battery G and the emitter of the NPN transistor Q1 at the negative power input end of the trigger circuit are connected via wires; the trigger signal input end relay K control power input end of the multi-way battery performance detection circuit and the negative pole of the battery G are connected via wires, the collector of the NPN transistor Q1 at the trigger circuit signal output end, the normally open contact end of the relay K at the signal output end of the multi-way battery performance detection circuit, and the collector of the NPN transistor Q2 at the signal output end of the multi-way pressure plate temperature detection circuit are respectively connected to the two signal input ends 3, 4, and 5 of the SMS module A1 via wires.

[0021] Figure 1 、 2As shown in Figure 3, the present invention installs several pressure plate detection devices 5 at the positions of the moving contact control plates (movable plates of the pressure plates) of several pressure plates 8. In order to ensure that the button of the micro switch SK just contacts the front side of the fixed plate of the pressure plate 8 and the internal contact of the micro switch SK is open after the moving contact and contact end of the electrical equipment controlled by each pressure plate 8 are closed, it is necessary to adjust the height of the screw 54 in the internal threaded tube 53 to ensure that the internal contact of the micro switch SK is open after the moving contact and contact end of the electrical equipment controlled by each pressure plate 8 are closed (the screw 54 is rotated upward to adjust the contact to the front side of the fixed plate of the pressure plate 8, and adjusted downward). After turning on the power switch S, the power output by the battery G enters the SMS circuit module A1, the pressure plate temperature detection circuit power input ends, and enters one end of the micro switch SK of the multi-channel pressure plate detection device. In actual circumstances, multiple pressure plate detection devices in the present invention are respectively installed at the positions of the moving contact control plates (movable plates of the pressure plates) of several pressure plates. When all pressure plates 8 are working normally, that is, after the moving contacts and contact ends of the electrical equipment controlled by all pressure plates 8 are closed, the button of the microswitch SK just touches the front side of the fixed plate of the pressure plate 8, and the internal contacts of the microswitch SK are open. In this way, the 12V power supply will not enter the base of the NPN transistor Q1, and the NPN transistor Q1 will be cut off. Then, the 3rd pin of the SMS module A1 will not input a low-level signal, and the SMS module A1 will not send SMS messages. During operation, as long as the moving contacts and contact ends of the electrical equipment controlled by any pressure plate 8 are not closed, the two internal contacts of the micro switch SK are closed, which will cause the positive electrode of the 12V power supply to enter the base of the NPN transistor Q1 through the resistor R for voltage reduction and current limiting. The NPN transistor Q1 is turned on and its collector outputs a low level into pin 3 of the SMS module A1. In this way, the SMS module A1, under the action of its internal circuit, will send out the first SMS message "pressure plate failure" stored internally. After the mobile phone of the manager who has established a connection with the SMS module A1 at the remote end receives the SMS, he will be able to learn that there is a problem with the pressure plate on site at the first time, and can rush to the site in time to find and repair the faulty pressure plate, thereby ensuring the smooth progress of production as much as possible.

[0022] Figure 1 、 2As shown in Figure 3, in the battery performance detection circuit, after the positive electrode of the power output from the single cell G1 (or G1N, G2N) in the substation battery pack enters the other end of the adjustable resistor RP1, when the single cell performance is good and the voltage is higher than 12V, the 12V battery positive power is reduced and limited by the adjustable resistor RP1, and the base voltage of the NPN transistor Q5 is higher than 0.7V. Therefore, the NPN transistor Q5 is turned on, and its collector outputs a low level to the base of the NPN transistor Q6. The base of the NPN transistor Q6 has no appropriate forward bias and is in the cut-off state. Then, the relay K cannot be electrically attracted, and the low level will not enter the 4th pin of the SMS module A1, and the SMS module A1 will not send SMS messages. In actual applications, when the performance of any single battery G1 (or G1N, G2N) is poor and the voltage is lower than 12V, the 12V battery positive power supply enters the NPN transistor Q5 base voltage below 0.7V after being reduced and limited by the adjustable resistor RP1. As a result, the NPN transistor Q5 is cut off and its collector no longer outputs a low level to enter the base of the NPN transistor Q6. The base of the NPN transistor Q6 obtains a suitable forward bias voltage from the positive electrode of the battery (or G1N, G2N) through the resistor R1 to reduce the voltage and limit the current, and then the collector of the NPN transistor Q6 outputs a low level to enter the negative power input terminal of the relay K. The relay K is energized and its control power input terminal and the normally open contact terminal are closed. Since the control power input terminal of relay K is connected to the negative terminal of battery G, and the normally open contact terminal is connected to pin 4 of SMS module A1, SMS module A1, under the action of its internal circuit, will send the second internally stored SMS message "Battery Failure". After the mobile phone of the manager who is remotely connected to SMS module A1 receives the SMS, he will be able to immediately learn that there is a battery problem on site and can rush to the site in time to locate the faulty battery and repair it, thus ensuring smooth production as much as possible.

[0023] Figure 1 、 2As shown in Figure 3, in the multi-channel pressure plate temperature detection circuit, in actual applications, when the electrical equipment controlled by the pressure plate is working normally (no load and no short circuit), the pressure plate temperature is relatively low (for example, below 50°C). At this moment, the positive pole of the power output by the battery G enters the NPN transistor Q2 after voltage reduction and current limiting through the thermistor T and resistor R2, and the base voltage is lower than 0.7V. The NPN transistor Q2 is in the cut-off state, and the SMS module A1 will not send SMS messages. When the electrical equipment controlled by the pressure plate is not working properly (overload or short circuit), the temperature of the pressure plate is relatively high (for example, higher than 50℃). At this moment, the positive electrode of the power output by the battery G enters the NPN transistor Q2 after the thermistor T and resistor R2, and the base voltage is higher than 0.7V. The NPN transistor Q2 is in the on state and the collector outputs a low level to the 5th pin of the SMS module A1. The SMS module A1, under the action of its internal circuit, will send the third SMS message "pressure plate" stored in the internal storage. After the mobile phone of the manager who has established a connection with the SMS module A1 at the remote end receives the SMS, he will be able to know immediately that there is a problem with the electrical equipment on site that causes the temperature of the pressure plate to rise. He can then rush to the site in time to find the faulty electrical equipment and perform maintenance, etc., thus ensuring the smooth progress of production as much as possible. Through the action of all the above circuits, in the present invention, when any pressure plate or single battery has a problem, or when the pressure plate temperature exceeds the standard, the SMS module A1 will send a SMS to the mobile phone of the remote manager to achieve a real-time prompt. In actual situations, the performance of each battery G1 in the substation gradually deteriorates. Therefore, as long as the voltage drops below 12V, the SMS module A1 will send a text message, and the management personnel can receive timely reminders.

[0024] Figure 3 In the present invention, the NPN transistors Q1, Q5, and Q6 are of model 9013; the resistance values of resistors R, R1, and R2 are 100K, 47K, and 100K, respectively; the specification of the adjustable resistor RP1 is 8M; the relay K is a DC12V miniature relay; and the thermistor T is a negative temperature coefficient thermistor of model NTC103D. In the present invention, the resistance value of the adjustable resistor RP1 needs to be determined during production. Specifically, one circuit of the battery performance detection circuit is connected to a standard DC adjustable regulated power supply, and the power output voltage of the regulated power supply is adjusted to 11.9V. Then, the resistance value of the adjustable resistor RP1 is slowly adjusted until the collector of the NPN transistor Q6 outputs a low level (the positive pole of the voltmeter is connected to the positive pole of the regulated power supply, and the black test lead is connected to the collector of the NPN transistor Q6). The resistance value of the adjustable resistor RP1 is then adjusted to the required value. Disconnect the regulated power supply and test the resistance value of the adjustable resistor RP1. The measured resistance value is the resistance value of RP1 in subsequent production. In subsequent production, the resistance value of the adjustable resistor RP1 can be directly adjusted to the desired value, or a fixed resistor of the same resistance value can be used instead.

[0025] While the principal features and advantages of the present invention have been shown and described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and all variations that come within the meaning and range of equivalents of the claims are intended to be embraced thereby.

[0026] Furthermore, it should be understood that while this specification describes embodiments, these embodiments do not necessarily encompass only a single technical solution. This description is provided for clarity only, and those skilled in the art should consider the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other embodiments that are understandable to those skilled in the art.

Claims

1. A substation monitoring device, comprising a battery and a short message circuit module, characterized in that: It also has a pressure plate detection device, a battery performance detection circuit, a trigger circuit, and a pressure plate temperature detection circuit; the pressure plate detection device has the same multiple, each pressure plate detection device includes a micro switch, a support tube, and an internal threaded tube, the internal threaded tube is installed at the upper end of the support tube, there is a screw in the upper end of the internal threaded tube, the upper end of the screw has a contact plate, the micro switch is installed at the upper end of the contact plate, and the lower end of the support tube has a support plate; the support plates of the multiple pressure plate detection devices are respectively installed on the rear side of the movable plates of multiple pressure plates in the substation; the pressure plate temperature detection circuit has the same multiple, each pressure plate temperature detection circuit includes a control subcircuit and a thermistor, and the thermistors of the multi-channel pressure plate temperature detection circuit are respectively installed on multiple pressure plates; the battery and SMS circuit module, the battery performance detection circuit, the trigger circuit, the control of the pressure plate temperature detection circuit The subcircuit is installed in the component box; the battery performance detection circuit has the same multi-channel, and the signal input ends of each battery performance detection circuit are respectively electrically connected to the positive and negative poles of each single battery in the battery pack of the substation; the two poles of the battery are respectively electrically connected to the SMS circuit module and the power input ends of the multi-channel pressure plate temperature detection circuit; one end of the microswitch of the multi-channel pressure plate detection equipment is electrically connected to the positive pole of the battery, and the other end of the microswitch of the multi-channel pressure plate detection equipment is electrically connected to the signal input end of the trigger circuit, the negative pole of the battery is electrically connected to the negative pole power input end of the trigger circuit and the trigger signal input end of the multi-channel battery performance detection circuit, and the signal output end of the trigger circuit, the multi-channel battery performance detection circuit, and the signal output of the multi-channel pressure plate temperature detection circuit are respectively electrically connected to the three signal input ends of the SMS module.

2. A substation monitoring device according to claim 1, characterized in that: After the moving contact of the electrical equipment controlled by each pressure plate and the contact end are closed, the internal contacts of the micro switch are open, and the micro switch is a normally closed contact type micro switch.

3. A substation monitoring device according to claim 1, characterized in that: The battery can also use a DC switching power supply module.

4. A substation monitoring device according to claim 1, characterized in that: Each battery performance detection circuit includes an adjustable resistor, an NPN transistor, a resistor, and a relay, which are electrically connected. One end of the adjustable resistor is connected to the base of the first NPN transistor, the collector of the first NPN transistor is connected to the base of the second NPN transistor and one end of the resistor R, the other end of the adjustable resistor is connected to the other end of the resistor and the positive power input end of the relay, the emitters of the two NPN transistors are connected, and the collector of the second NPN transistor is connected to the negative power input end of the relay.

5. A substation monitoring device according to claim 1, characterized in that: The trigger circuit includes a resistor and an NPN transistor, which are electrically connected therebetween, and one end of the resistor is connected to the base of the NPN transistor.

6. A substation monitoring device according to claim 1, characterized in that: The SMS circuit module is an SMS alarm module.

7. A substation monitoring device according to claim 1, characterized in that: The control subcircuit of each pressure plate temperature detection circuit includes a resistor and an NPN transistor, which are electrically connected to the thermistor. One end of the thermistor is connected to one end of the resistor, and the other end of the resistor is connected to the base of the NPN transistor.

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